Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5783950 | Lithos | 2017 | 84 Pages |
Abstract
The Triassic granitoids from the Songpan-Ganze terrane show remarkable temporal-spatial-petrogenetic affinities to the counterparts of subduction zones in the Yidun and Kunlun arc terranes, plausibly support a double-sided subduction of the Paleo-Tethys ocean. The mixing mechanism for the formation of the Tagong pluton was likely associated with the break-off of a subducted slab of the Paleo-Tethys ocean, which triggered subsequent upwelling of hot asthenosphere beneath accreted arc fragments and induced lithospheric mantle-derived magmas suffice to underplate and mix with the lower crust-derived felsic magma. Collectively, the late Triassic igneous rocks record significant crustal growth and continental development as response to the final demise of the Paleo-Tethys ocean (ca. 210Â Ma), and marks the last episode of orogenic magmatism in the Songpan-Ganze terrane after which the region entered into post-orogenic phase of evolution.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Qiong Chen, Min Sun, Guochun Zhao, Fengli Yang, Xiaoping Long, Jianhua Li, Jun Wang, Yang Yu,