Journal
GEOLOGY
Volume 44, Issue 9, Pages 727-730Publisher
GEOLOGICAL SOC AMER, INC
DOI: 10.1130/G38030.1
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Funding
- National Basic Research Program of China [XDB03010401]
- National Natural Science Foundation of China [41472185, 41490610]
- China Post-doctoral Science Foundation [2012M510566]
- U.S. National Science Foundation [EAR-1008527]
- European Research Council Starting [306810]
- Nether-lands Organisation for Scientific Research (NWO) VIDI [864.11.004]
- European Research Council (ERC) [306810] Funding Source: European Research Council (ERC)
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The Mesozoic plate tectonic history of Gondwana-derived crustal blocks of the Tibetan Plateau is hotly debated, but so far, paleomagnetic constraints quantifying their paleolatitude drift history remain sparse. Here, we compile existing data published mainly in Chinese literature and provide a new, high-quality, well-dated paleomagnetic pole from the ca. 180 Ma Sangri Group volcanic rocks of the Lhasa terrane that yields a paleolatitude of 3.7 degrees S +/- 3.4 degrees. This new pole confirms a trend in the data that suggests that Lhasa drifted away from Gondwana in Late Triassic time, instead of Permian time as widely perceived. A total northward drift of similar to 4500 km between ca. 220 and ca. 130 Ma yields an average south-north plate motion rate of 5 cm/yr. Our results are consistent with either an Indian or an Australian provenance of Lhasa.
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