INENCO   05446
INSTITUTO DE INVESTIGACIONES EN ENERGIA NO CONVENCIONAL
Unidad Ejecutora - UE
artículos
Título:
Receiver function images from the Moho and the slab beneath
Autor/es:
I WÖLBERN; B. HEIT; X. YUAN,; G. ASCH; R. KIND,; J.G. VIRAMONTE; H. WILKE
Revista:
GEOPHYSICAL JOURNAL INTERNATIONAL
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2009 vol. 177 p. 296 - 308
ISSN:
0956-540X
Resumen:
Teleseismic data recorded during one and a half years are investigated with the receiver
function technique to determine the crustal and upper-mantle structures underneath the highly
elevated Altiplano and Puna plateaus in the central Andes. A series of converting interfaces
are determined along two profiles at 21◦S and 25.5◦S, respectively, with a station spacing of
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
◦S and 25.5◦S, respectively, with a station spacing of
approximately 10 km. The data provide the highest resolution gained from a passive project
in this area, so far. The oceanic Nazca plate is detected down to 120 km beneath the Altiplano
whereas beneath the Puna, the slab can unexpectedly be traced down to 200 km depth at
longer periods. A shallow crustal low-velocity zone is determined beneath both plateaus
exhibiting segmentation. In the case of the Altiplano, the segments present vertical offsets and
are separated by inclined interfaces, which coincide with major fault systems at the surface.
An average depth to Moho of about 70 km is determined for the Altiplano plateau. A strong
negative velocity anomaly located directly below the Moho along with local crustal thinning
is interpreted beneath the volcanic arc of the Altiplano plateau between 67◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.
◦W and 68.5◦W.
A deep section of the Puna profile reveals thinning of the mantle transition zone. Although
poorly resolved, the detected anomaly may suggest the presence of a mantle plume, which
may constitute the origin of the anomalous temperatures at the depth of the upper-mantle
discontinuities.