The central ailaoshan ophiolite and modern analogs

Chun Kit Lai; Sebastien Meffre; Anthony J. Crawford; Khin Zaw; Jacqueline A. Halpin; Chuan-Dong Xue; Abhisit Salam

doi:10.1016/j.gr.2013.03.004

The central ailaoshan ophiolite and modern analogs

Chun Kit Lai^*, Sebastien Meffre, Anthony J. Crawford, Khin Zaw, Jacqueline A. Halpin, Chuan-Dong Xue, Abhisit Salam

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

145 Citations (Scopus)

Abstract

The Central Ailaoshan (CAL) ophiolite represents an important tectonic component of the Jinshajiang-Ailaoshan-Song Ma suture zone separating the South China and Indochina blocks in the mainland SE Asia. The CAL ophiolite occurs as a complex tectonic mélange, and preserves the history of the opening and closure of the once vast Jinshajiang-Ailaoshan-Song Ma branch of the Paleotethys. New and existing geological data indicate that the CAL ophiolite contains magmatic rocks generated by: (1) L. Devonian-E. Carboniferous (ca. 380-330. Ma) volcanic passive margin-breakup development in the NW Gondwana margin; (2) L. Permian (ca. 258. Ma) Emeishan large igneous province-related continental rift magmatism, together with (and intruded by) (3) earliest M. Triassic (ca. 244. Ma) continent-continent syn-collisional S-type granitoids. The Devono-Carboniferous suites of the CAL ophiolite are highly comparable with many continental margin-type Alpine Tethyan ophiolites. In addition, the various CAL magmatic suites have strong South China block-affinities with coeval magmatism particularly in the western South China block, Jinshajiang-, Song Ma-, and Song Da terranes.

Original language	English
Pages (from-to)	75-88
Number of pages	14
Journal	Gondwana Research
Volume	26
Issue number	1
DOIs	https://doi.org/10.1016/j.gr.2013.03.004
Publication status	Published - Jul 2014
Externally published	Yes

Keywords

Jinshajiang–Ailaoshan–Song Ma suture
Ophiolite
Paleotethys
Gondwana volcanic passive margin
South China–Indochina collision

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10.1016/j.gr.2013.03.004

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title = "The central ailaoshan ophiolite and modern analogs",

abstract = "The Central Ailaoshan (CAL) ophiolite represents an important tectonic component of the Jinshajiang-Ailaoshan-Song Ma suture zone separating the South China and Indochina blocks in the mainland SE Asia. The CAL ophiolite occurs as a complex tectonic m{\'e}lange, and preserves the history of the opening and closure of the once vast Jinshajiang-Ailaoshan-Song Ma branch of the Paleotethys. New and existing geological data indicate that the CAL ophiolite contains magmatic rocks generated by: (1) L. Devonian-E. Carboniferous (ca. 380-330. Ma) volcanic passive margin-breakup development in the NW Gondwana margin; (2) L. Permian (ca. 258. Ma) Emeishan large igneous province-related continental rift magmatism, together with (and intruded by) (3) earliest M. Triassic (ca. 244. Ma) continent-continent syn-collisional S-type granitoids. The Devono-Carboniferous suites of the CAL ophiolite are highly comparable with many continental margin-type Alpine Tethyan ophiolites. In addition, the various CAL magmatic suites have strong South China block-affinities with coeval magmatism particularly in the western South China block, Jinshajiang-, Song Ma-, and Song Da terranes.",

keywords = "Jinshajiang–Ailaoshan–Song Ma suture, Ophiolite, Paleotethys, Gondwana volcanic passive margin, South China–Indochina collision",

author = "Lai, \{Chun Kit\} and Sebastien Meffre and Crawford, \{Anthony J.\} and Khin Zaw and Halpin, \{Jacqueline A.\} and Chuan-Dong Xue and Abhisit Salam",

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AU - Lai, Chun Kit

AU - Meffre, Sebastien

AU - Crawford, Anthony J.

AU - Zaw, Khin

AU - Halpin, Jacqueline A.

AU - Xue, Chuan-Dong

AU - Salam, Abhisit

PY - 2014/7

Y1 - 2014/7

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AB - The Central Ailaoshan (CAL) ophiolite represents an important tectonic component of the Jinshajiang-Ailaoshan-Song Ma suture zone separating the South China and Indochina blocks in the mainland SE Asia. The CAL ophiolite occurs as a complex tectonic mélange, and preserves the history of the opening and closure of the once vast Jinshajiang-Ailaoshan-Song Ma branch of the Paleotethys. New and existing geological data indicate that the CAL ophiolite contains magmatic rocks generated by: (1) L. Devonian-E. Carboniferous (ca. 380-330. Ma) volcanic passive margin-breakup development in the NW Gondwana margin; (2) L. Permian (ca. 258. Ma) Emeishan large igneous province-related continental rift magmatism, together with (and intruded by) (3) earliest M. Triassic (ca. 244. Ma) continent-continent syn-collisional S-type granitoids. The Devono-Carboniferous suites of the CAL ophiolite are highly comparable with many continental margin-type Alpine Tethyan ophiolites. In addition, the various CAL magmatic suites have strong South China block-affinities with coeval magmatism particularly in the western South China block, Jinshajiang-, Song Ma-, and Song Da terranes.

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KW - Paleotethys

KW - Gondwana volcanic passive margin

KW - South China–Indochina collision

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ER -

The central ailaoshan ophiolite and modern analogs

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Keywords

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