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Chronological study of the pre-Permian basement rocks of southern Patagonia

Pankhurst, Robert J; Rapela, Carlos W; Loske, W; Marquez, M; Fanning, Christopher


Small outcrops of the basement of the Deseado Massif, consisting of weathered, altered granitoids and their metasedimentary host rocks, were dated by the U-Pb zircon method using thermal ionization mass spectrometry and ion microprobe (SHRIMP). The provenance ages of detrital zircon in the metasediments are typical of material available in the adjacent regions of the Gondwana margin, with prominent components at 1000-1100 and 580±6 Ma, the latter probably approximating the age of sedimentation...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
Source: Journal of South American Earth Sciences
DOI: 10.1016/S0895-9811(03)00017-8


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