TY - JOUR
T1 - Combined U-Pb and Lu-Hf isotope study from the Las Lozas volcanics, northwestern Argentina: Evidence of juvenile Cryogenian-derived, lower Pennsylvanian volcanism in western Gondwana
AU - Zappettini, E.O.
AU - Coira, B.L.
AU - Santos, Joao
AU - Cisterna, C.E.
AU - Belousova, E.A.
PY - 2015
Y1 - 2015
N2 - © 2015 Elsevier Ltd. Las Lozas volcanic succession, cropping out in the southwestern Puna, Catamarca province, Argentina, consists of an intracontinental volcanic sequence of Carboniferous age. The lavic members are predominantly rhyolites, and subordinated andesites and basalts. The volcaniclastic layers consist of monomictic and polymictic breccias with structures denoting processes of lava fragmentation. They constitute a bimodal suite, ranging from basalts to high silica rhyolites. A new U-Pb SHRIMP age of 320±2 Ma for a rhyolite allows extending the Mississipian magmatism of the region to the lower Pennsylvanian. Hf data point to juvenile sources of Cryogenian age with no evidence of older reworked crustal contamination.
AB - © 2015 Elsevier Ltd. Las Lozas volcanic succession, cropping out in the southwestern Puna, Catamarca province, Argentina, consists of an intracontinental volcanic sequence of Carboniferous age. The lavic members are predominantly rhyolites, and subordinated andesites and basalts. The volcaniclastic layers consist of monomictic and polymictic breccias with structures denoting processes of lava fragmentation. They constitute a bimodal suite, ranging from basalts to high silica rhyolites. A new U-Pb SHRIMP age of 320±2 Ma for a rhyolite allows extending the Mississipian magmatism of the region to the lower Pennsylvanian. Hf data point to juvenile sources of Cryogenian age with no evidence of older reworked crustal contamination.
U2 - 10.1016/j.jsames.2015.01.004
DO - 10.1016/j.jsames.2015.01.004
M3 - Article
SN - 0895-9811
VL - 59
SP - 13
EP - 18
JO - Journal of South American Earth Sciences
JF - Journal of South American Earth Sciences
ER -