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Post-collisional crustal extension setting and VHMS mineralization in the Jinshajiang orogenic belt, southwestern China

Citation

Hou, Z and Wang, L and Zaw, K and Mo, X and Wang, M and Li, D and Pan, G, Post-collisional crustal extension setting and VHMS mineralization in the Jinshajiang orogenic belt, southwestern China, Ore Geology Reviews, 22, (3-4) pp. 177-199. ISSN 0169-1368 (2003) [Refereed Article]

DOI: doi:10.1016/S0169-1368(02)00141-5

Abstract

The Jinshajiang orogenic belt (JOB) of southwestern China, located along the eastern margin of the Himalayan-Tibetan orogen, includes a collage of continental blocks joined by Paleozoic ophiolitic sutures and Permian volcanic arcs. Three major tectonic stages are recognized based on the volcanic-sedimentary sequence and geochemistry of volcanic rocks in the belt. Westward subduction of the Paleozoic Jinshajiang oceanic plate at the end of Permian resulted in the formation of the Chubarong-Dongzhulin intra-oceanic arc and Jamda-Weixi volcanic arc on the eastern margin of the Changdu continental block. Collision between the volcanic arcs and the Yangtze continent block during Early-Middle Triassic caused the closing of the Jinshajiang oceanic basin and the eruption of high-Si and -Al potassic rhyolitic rocks along the Permian volcanic arc. Slab breakoff or mountain-root delamination under this orogenic belt led to post-collisional crustal extension at the end of the Triassic, forming a series of rift basins on this continental margin arc. Significant potential for VHMS deposits occurs in the submarine volcanic districts of the JOB. Mesozoic VHMS deposits occur in the post-collisional extension environment and cluster in the Late Triassic rift basins. © 2002 Elsevier Science B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Ore Deposit Petrology
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Other Mineral Resources (excl. Energy Resources)
Objective Field:Mineral Resources (excl. Energy Resources) not elsewhere classified
Author:Zaw, K (Professor Khin Zaw)
ID Code:28010
Year Published:2003
Web of Science® Times Cited:34
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2003-08-01
Last Modified:2011-11-23
Downloads:0

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