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New SHRIMP Age and Microstructures from a Deformed A-Type Granite, Kanigiri, Southern India: Constraining the Hiatus between Orogenic Closure and Postorogenic Rifting

Sain, Arnab; Saha, Dilip; Joy, Sojen; Jelsma, Hielke; Armstrong, Richard

Description

A new U-Pb zircon SHRIMP age of 1284 Ma from the Kanigiri granite, India, is reported to help constrain the middle to late Mesoproterozoic tectonic evolution of the Nellore schist belt (NSB). The Kanigiri granite has whole-rock chemical characteristics of A-type granites and is marked by light rare earth element enrichment, a strong negative Eu anomaly, and negative Ba, Sr, P, Ti, and Yb anomalies, indicating feldspar, apatite, and ilmenite/magnetite fractionation. Samples show Y/Nb versus...[Show more]

CollectionsANU Research Publications
Date published: 2017-03
Type: Journal article
URI: http://hdl.handle.net/1885/113999
Source: The Journal of Geology
DOI: 10.1086/690196

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