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Geology Of Lihuel Calel – Northern Patagonia – Argentina

International - Date: 16th – 23rd April, 2015

Raising more than 500 meters above the sea level, Lihuel Calel is a topographic height of an ignimbritic plateau at the Chadileuvú Massif (south-central La Pampa province, northern Patagonia, Argentina). The plateau is consisted by a sequence of ignimbrites with moderate to high level of welding and rhyolitic to dacitic fully recrystallized reoignimbrites, with a predominance of the rhyolitc units. With ages ranging between 270 – 230 Ma, the rocks of Lihuel Calel are probably the late magmatic examples of the Choiyoi Igneous Province, the greatest occurrence of silicic magmatism at southwestern Gondwana.

Located near the suture zones of three different accreted terranes, the area is important to the understanding of the Permo–Triassic dynamics of southwestern Gondwana. The ongoing work aims to contribute with the knowledge of the evolutionary history of Lihuel Calel through a detailed structural study as with new isotopic geochemistry analyses in order to compare the results with regional data available.

Participants: Prof. Victor Ramos (Universidad de Buenos Aires- UBA), Rafael de Araújo Fragoso (Universidade Federal do Rio de Janeiro- UFRJ), Miguel Esteban Ramos (UBA).