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Petrogeochemistry and SHRIMP dating of ga'erqin pillow basalt in Duolong, Northern Tibet

Citation

Lin, B and Tang, J-X and Song, Y and Wang, Q and Cao, H-W and Baker, M and Zhang, L-J and Li, Y-B, Petrogeochemistry and SHRIMP dating of ga'erqin pillow basalt in Duolong, Northern Tibet, Acta Geoscientica Sinica, 38, (5) pp. 702-710. ISSN 1006-3021 (2017) [Refereed Article]


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Copyright 2017 Acta Geoscientica Sinica

DOI: doi:10.3975/cagsb.2017.05.10

Abstract

Duolong is one of the largest porphyry Cu (Au) ore concentration areas, its dynamic history always being the hot topic for study. Pillow basalt was discovered in Jurassic marine sedimentary strata of Ga'erqin area. Geochronological and geochemical study is helpful to revealing the evolution history of Bangong Co-Nujiang Ocean. Geochemical data show that basalt has low REE (∑REE 38.01נ10-6∼63.56נ10-6) and no significant differentiation between LREE and HREE. The chondrite-normalized REE patterns are flat, similar to features of E-MORB. SHRIMP dating shows that the age of pillow basalt is (29811) Ma, coinciding with ages of mafic dykes and basalt in Late Carboniferous to Early Permian strata. All of these phenomena may be the products of large-scale volcanic activity for the opening of Bannu Ocean in early Permian strata.

Item Details

Item Type:Refereed Article
Keywords:duolong, petrogeochemistry, pllow basalt, SHRIMP dating, Tibet
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
UTAS Author:Lin, B (Mr Bin Lin)
UTAS Author:Baker, M (Dr Michael Baker)
UTAS Author:Zhang, L-J (Dr Lejun Zhang)
ID Code:126914
Year Published:2017
Deposited By:CODES ARC
Deposited On:2018-07-02
Last Modified:2018-10-12
Downloads:0

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