期刊
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
卷 29, 期 4, 页码 764-771出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsames.2010.06.002
关键词
Northern Andean; Basement tectonics; Paleogeography; Geochronology; Grenvillian; Paleozoic; Orogenic; Oaxaquia
This paper summarizes geological data from the basement massifs of the northern Andes. Geological and geochronological data from this region indicate that the metamorphic basement consolidated during the Orinoquiense (similar to 1.0 Ga) and Caparonensis (similar to 0.47 Ga) orogenic events. The latter formed part of a proto-Andean orogen that extended from Venezuela to northern Argentina. Interactions between Laurentia and the peri-Amazonian proto-Andes during Late Proterozoic-Paleozoic times, is supported by geological, geochronological, isotopic data and by faunal affinities of the sedimentary sequences overlying the basement complex. This interaction may have included possible terrane transfer between Laurentia and Amazonia. Geological, tracer-isotopic and geochronological data suggest that a fragment of the proto-Andean orogen is presently located at the southern end of Mexico (Oaxaquia). The transfer of Oaxaquia from the northern termination of the proto-Andes, most likely occurred in late Paleozoic time and was left attached to N. America upon the disaggregation of Pangea. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据