INVESTIGADORES
PINOTTI Lucio Pedro
artículos
Título:
Ascent and emplacement of pegmatitic magmas in a compressional shear zone (Sierras de Córdoba, Argentina).
Autor/es:
MANUEL DEMARTIS, LUCIO P PINOTTI, JORGE E CONIGLIO, FERNANDO J D'ERAMO, JOSÉ M TUBÍA MARTÍNEZ, EUGENIO ARAGÓN, LEONARDO A AGULLEIRO INSÚA
Revista:
JOURNAL OF STRUCTURAL GEOLOGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 33 p. 1334 - 1346
ISSN:
0191-8141
Resumen:
Ordovician to Devonian aged crustal-scale Guacha Corral shear zone (GCSZ), central Argentina, hosts rare
element pegmatites of the Comechingones pegmatitic field (CPF). In the CPF an eastwards decreasing
strain gradient related to the GCSZ deformation is defined, with a high strain domain (HSD) to the west
and a low strain domain (LSD) to the east. Pegmatites of the CPF were emplaced in both HSD and LSD
synkinematically during ductile GCSZ deformation. Two main mechanisms for pegmatitic melt ascent
and emplacement are recognized: ?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
and a low strain domain (LSD) to the east. Pegmatites of the CPF were emplaced in both HSD and LSD
synkinematically during ductile GCSZ deformation. Two main mechanisms for pegmatitic melt ascent
and emplacement are recognized: ?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
strain gradient related to the GCSZ deformation is defined, with a high strain domain (HSD) to the west
and a low strain domain (LSD) to the east. Pegmatites of the CPF were emplaced in both HSD and LSD
synkinematically during ductile GCSZ deformation. Two main mechanisms for pegmatitic melt ascent
and emplacement are recognized: ?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
and a low strain domain (LSD) to the east. Pegmatites of the CPF were emplaced in both HSD and LSD
synkinematically during ductile GCSZ deformation. Two main mechanisms for pegmatitic melt ascent
and emplacement are recognized: ?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
field (CPF). In the CPF an eastwards decreasing
strain gradient related to the GCSZ deformation is defined, with a high strain domain (HSD) to the west
and a low strain domain (LSD) to the east. Pegmatites of the CPF were emplaced in both HSD and LSD
synkinematically during ductile GCSZ deformation. Two main mechanisms for pegmatitic melt ascent
and emplacement are recognized: ?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
and a low strain domain (LSD) to the east. Pegmatites of the CPF were emplaced in both HSD and LSD
synkinematically during ductile GCSZ deformation. Two main mechanisms for pegmatitic melt ascent
and emplacement are recognized: ?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
fined, with a high strain domain (HSD) to the west
and a low strain domain (LSD) to the east. Pegmatites of the CPF were emplaced in both HSD and LSD
synkinematically during ductile GCSZ deformation. Two main mechanisms for pegmatitic melt ascent
and emplacement are recognized: ?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
?fracture-controlled? and ?magma pumping? mechanisms. The former
implies fracturing generated due to simple shear deformation not related to any previous heterogeneity.
With further deformation, pegmatites were emplaced in low-dip surfaces of anisotropy (C?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
?-planes or Tfractures),
that might behave as releasing bends connecting adjacent high-dip conduits or shear zones.
Displacements along staggered shear zones with releasing bends induce the local development of
domains with negative pressure gradients, where open spaces could form transiently attracting for the
collection of buoyant melts, a mechanism similar to ?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
?magma pumping?. With ongoing deformation
pegmatites were progressively rotated, sheared and transposed to the mylonitic foliation. Late pegmatites
emplaced by either of the two mechanisms in the HSD and the TZ have retained their original
orientations.
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