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The Western Ailaoshan Volcanic Belts and their SE Asia connection: a new tectonic model for the Eastern Indochina Block

Citation

Lai, CK and Meffre, S and Crawford, AJ and Zaw, K and Xue, C-D and Halpin, JA, The Western Ailaoshan Volcanic Belts and their SE Asia connection: a new tectonic model for the Eastern Indochina Block, Gondwana Research, 26, (1) pp. 52-74. ISSN 1342-937X (2014) [Refereed Article]

Copyright Statement

Copyright 2013 International Association for Gondwana Research

DOI: doi:10.1016/j.gr.2013.03.003

Abstract

The Western Ailaoshan (WAL) Volcanic Belts mark the western boundary of the South China–Indochina Suture Zone along the Ailaoshan Fold Belt. Geochronological and geochemical evidence suggests that the WAL Volcanic Belts vary in ages and origins, and includes (1) L. Carboniferous–earliest M.-Permian (ca. 300–270 Ma) incipient backarc basin magmatism; (2) M. Permian (ca. 265 Ma) island arc/mature backarc basin magmatism; (3) early L. Permian (ca. 260–255 Ma) WAL–Indochina arc–continent collision and the associated syn-collisional granitic magmatism, as well as subsequent (4) E. Triassic (ca. 250–245 Ma) post-collisional magmatism. Regional geological comparison indicates that the post-L. Carboniferous WAL tectonic evolution was closely related to the Eastern Indochina Block. We present a new G-Plate geodynamic evolution model for the Ailaoshan Fold Belt and its surrounding South China–Indochina region, based on new and published U–Pb zircon ages, together with whole rock and Pb-isotope geochemical data.

Item Details

Item Type:Refereed Article
Keywords:Western Ailaoshan (WAL) Volcanic Belts, SE Asia, arc/backarc basin, arc–continent collision, g-plate tectonic reconstruction
Research Division:Earth Sciences
Research Group:Geology
Research Field:Tectonics
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Lai, CK (Dr Chun Lai)
Author:Meffre, S (Dr Sebastien Meffre)
Author:Crawford, AJ (Professor Anthony Crawford)
Author:Zaw, K (Professor Khin Zaw)
Author:Halpin, JA (Dr Jacqueline Halpin)
ID Code:91979
Year Published:2014
Web of Science® Times Cited:44
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2014-06-04
Last Modified:2017-10-30
Downloads:0

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