کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4682662 1348934 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Northern South America basement tectonics and implications for paleocontinental reconstructions of the Americas
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Northern South America basement tectonics and implications for paleocontinental reconstructions of the Americas
چکیده انگلیسی

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 (∼1.0 Ga) and Caparonensis (∼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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of South American Earth Sciences - Volume 29, Issue 4, October 2010, Pages 764–771
نویسندگان
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