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Discovery of a Neoproterozoic granite in the Northern Alxa region, NW China: its age, petrogenesis, and tectonic significance
Stockholm University, Faculty of Science, Department of Geological Sciences. Chinese Academy of Geological Sciences, China; Peking University, China.
Stockholm University, Faculty of Science, Department of Geological Sciences.
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(English)In: Geological Magazine, ISSN 0016-7568, E-ISSN 1469-5081Article in journal (Refereed) Epub ahead of print
Abstract

A Neoproterozoic granite (Western Huhetaoergai granite) from the Northern Alxa region, southern Central Asia Orogenic Belt (CAOB) is first recognized by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb zircon dating (889±8 Ma). It is a highly fractionated potassium-rich calc-alkaline pluton with low εNd(t) (−2.6 to −1.1) and high (87Sr/86Sr) t (0.727305–0.735626), and is probably derived from a mantle source and assimilated crustal rocks with very high 87Sr/86Sr. Regional geology implies that it may reflect the existence of a microcontinent, and the formation of the Western Huhetaoergai granite is related to the assembly of Rodinia.

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Earth and Related Environmental Sciences
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URN: urn:nbn:se:su:diva-126283DOI: 10.1017/S0016756815000631OAI: oai:DiVA.org:su-126283DiVA: diva2:898612
Available from: 2016-01-28 Created: 2016-01-28 Last updated: 2016-01-29

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Zhang, WenPease, VictoriaMeng, QingpengWohlgemuth-Ueberwasser, Cora
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