成果归属作者：

朱弟成 ; 莫宣学 ; 赵志丹

成果归属机构：

地球科学与资源学院

作者：

Zhu, Di-Cheng ; Zhao, Zhi-Dan ; Niu, Yaoling ; Dilek, Yildirim ; Mo, Xuan-Xue

单位：

China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China;China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China;Univ Durham, Dept Earth Sci, Durham DH1 3LE, England;Miami Univ, Dept Geol, Oxford, OH 45056 USA

摘要：

The U-Pb age and Hf isotope data on detrital zircons from Paleozoic metasedimentary rocks in the Lhasa terrane (Tibet) define a distinctive age population of ca. 1170 Ma with epsilon(Hf)(t) values identical to the coeval detrital zircons from Western Australia, but those from the western Qiangtang and Tethyan Himalaya terranes define an age population of ca. 950 Ma with a similar epsilon(Hf)(t) range. The ca. 1170 Ma detrital zircons in the Lhasa terrane were most likely derived from the Albany-Fraser belt in southwest Australia, whereas the ca. 950 Ma detrital zircons from both the western Qiangtang and Tethyan Himalaya terranes might have been sourced from the High Himalaya to the south. Such detrital zircon connections enable us to propose that the Lhasa terrane is exotic to the Tibetan Plateau system, and should no longer be considered as part of the Qiangtang-Greater India-Tethyan Himalaya continental margin system in the Paleozoic reconstruction of the Indian plate, as current models show; rather, it should be placed at the northwestern margin of Australia. These results provide new constraints on the paleogeographic reconstruction and tectonic evolution of southern Tibet, and indicate that the Lhasa terrane evolved as part of the late Precambrian-early Paleozoic evolution as part of Australia in a different paleogeographical setting than that of the Qiangtang-Greater India-Tethyan Himalaya system.

基金：

National Key Project for Basic Research of China [2011CB403102, 2009CB421002]; National Natural Science Foundation of China [41073013, 40830317]; Chinese 111 Project [B07011]; Leverhulme Trust; Durham University; China University of Geosciences-Beijing; Miami University

语种：

英文

DOI：

10.1130/G31895.1

来源：

GEOLOGY,2011(8):727-730.

出版日期：

2011-08

提交日期：

2017-12-14

引用参考：

Zhu, Di-Cheng; Zhao, Zhi-Dan; Niu, Yaoling; Dilek, Yildirim; Mo, Xuan-Xue. Lhasa terrane in southern Tibet came from Australia[J]. GEOLOGY,2011(8):727-730.