TY - JOUR
T1 - Calc-alkaline and alkaline miocene and calc-alkaline recent volcanism in the Southernmost Patagonian Cordillera, Chile
AU - Puig, A.
AU - Herve, M.
AU - Suarez, M.
AU - Saunders, A. D.
PY - 1984
Y1 - 1984
N2 - In the southernmost Patagonian Cordillera (south of Lat. 54°45′) previously unrecorded calc-alkaline dacites and andesites, and adjacent alkali-basalts, were dated at 21 and 18 Ma (K-Ar), respectively. In the same area post-glacial low-K calc-alkaline andesites, identified at Isla Cook, represent the southernmost Recent volcanism recorded so far in South America, about 400 km south of Monte Burney, previously known as the southernmost Recent volcano. The association of contemporaneous calc-alkaline and alkali volcanics suggests a subduction-related environment for the Miocene volcanism, and the Recent calc-alkaline volcanics indicate that currently there is a small component of subduction of the Antarctic Plate beneath the South American part of the Scotia Plate.
AB - In the southernmost Patagonian Cordillera (south of Lat. 54°45′) previously unrecorded calc-alkaline dacites and andesites, and adjacent alkali-basalts, were dated at 21 and 18 Ma (K-Ar), respectively. In the same area post-glacial low-K calc-alkaline andesites, identified at Isla Cook, represent the southernmost Recent volcanism recorded so far in South America, about 400 km south of Monte Burney, previously known as the southernmost Recent volcano. The association of contemporaneous calc-alkaline and alkali volcanics suggests a subduction-related environment for the Miocene volcanism, and the Recent calc-alkaline volcanics indicate that currently there is a small component of subduction of the Antarctic Plate beneath the South American part of the Scotia Plate.
UR - http://www.scopus.com/inward/record.url?scp=0021283652&partnerID=8YFLogxK
U2 - 10.1016/0377-0273(84)90020-9
DO - 10.1016/0377-0273(84)90020-9
M3 - Article
AN - SCOPUS:0021283652
VL - 21
SP - 149
EP - 163
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
SN - 0377-0273
IS - 1-2
ER -