Complex morphological architecture of the lava Flow field related to the Alumbrera scoria cone, Southern Puna, Argentina

WALTER BAEZ; SOMMER C; ARNOSIO M; BUSTOS E.; GIORDANO G; BARDELLI LORENZO; AGOSTINA CHIODI; JOSÉ VIRAMONTE

Congreso; VIII Symposium on volcanism and related settings; 2022

Despite the progress achieved in recent decades regarding lava flows modeling, understanding the dynamic of complex compound lava flow fields still requires field studies both during and Improving the capability to infer eruption and emplacement parameters from lava flows is a main goal for the volcanology since this approach is essential to understanding effusive volcanism in the solar system. In addition, re from its morphological architecture provide hazard related to lava flows emplacement. the cinematic of crust formation and how it deforms under stress over time. The term “lava morphotype” is usually used to describe the characteristics of the surface morphology of a lava flow after solidification and can be understood as a specific stagelocated in the Antofagasta valley (Catamarca province, Argentina) volcanic centers of the Quaternary mafic suite of the Southern PunA detailed geomorphological map (morphotype map)cone. This compound lava field is formed by countless lava flow units occupying an area of 35 km2 and has basaltic trachyandesites and was issued from many vents along the base of the Alumbrera volcano spread mainly towards the S and OSO, and to a lesser extent to the NO. The S path reached the greatest distance since it followed the general slope edge of the basin and by the presence of older result of the new topography generated by the lava field and confined basin. Lava flow morphotypes and structures morphotype was defined according to the stage of degree of detachment of fragments. flow structures were mapped in a Geographica from Google Earth and aerial photographs. pahoehoe, Rubbly-pahoehoe, Rubbly units (Rubbly-dominated zones, Spiny dominated zones are constituted by Mixed zones are characterized by a complex with highly variable surface morphology. In addition, several structures were identified in the field and mapped, including levee-channels systems clefts and squeeze ups. The three main patharchitectures that in turn represent the variable influence of the long topographic control during its emplacement.