Mesoarchaean crustal history of the eastern Indian Craton: Sm-Nd and U-Pb isotopic evidence

Autor:	Fernando Corfu, S. Sengupta, Robert H. McNutt, D.K. Paul
Rok vydání:	1996
Předmět:	Craton geography geography.geographical_feature_category Geochemistry and Petrology Lithology Pluton Geochemistry Geology Xenolith Petrology Protolith Zircon
Zdroj:	Scopus-Elsevier
ISSN:	0301-9268
Popis:	A variety of xenoliths representing high-Al trondhjemites and supracrustal lithologies occur within Mesoarchaean granitoid rocks of the eastern Indian Craton. A trondhjemitic xenolith from the Bonai pluton yields a UPb age of 3380 +6 −4 Ma for magmatic zircon and a minimum age of 3448 Ma for xenocrystic zircon grains. This sample also shows an ϵ Nd value of −4.2 and T DM of 3.9 Ga whereas four other xenoliths yield ϵ Nd values ranging from +0.3 to +1.8 and T DM of 3.54 to 3.37, which are consistent with published data from the region and suggest a derivation from protoliths with relatively short-lived crustal residence times.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f9a2d541f9b162896a30ec881819d7c https://doi.org/10.1016/0301-9268(95)00042-9 Zobrazit plný text záznamu Full Text from ScienceDirect