气候变化领域集成服务门户(CCPortal): A Consistently High-Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large-Scale True Polar Wander

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DOI	10.1029/2020JB021541
	A Consistently High-Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large-Scale True Polar Wander
	Park Y.; Swanson-Hysell N.L.; Xian H.; Zhang S.; Condon D.J.; Fu H.; Macdonald F.A.
发表日期	2021
ISSN	21699313
卷号	126 期号:6
英文摘要	The Tonian supercontinent Rodinia is hypothesized to have included almost all Proterozoic continental blocks. Competing models variably place South China at the core or periphery of Rodinia or separated from it entirely. Tonian paleogeographic models also vary in whether they incorporate hypothesized large and rapid oscillatory true polar wander associated with the ca. 810–795 Ma Bitter Springs Stage. Here, we present paleomagnetic data paired with U-Pb chemical abrasion isotope dilution thermal ionization mass spectrometry zircon geochronology from the Tonian Xiajiang Group in South China to establish the craton's position and test the Bitter Springs Stage true polar wander hypothesis. Fine-grained siliciclastic sediments and ashes of the Xiajiang Group post-date the Jiangnan Orogeny, which united the Yangtze and Cathaysia blocks. A U-Pb zircon date of 815.73 ± 0.18 Ma from a tuff near the base of the Xiajiang Group constrains the Jiangnan Orogeny to have ended between ca. 830 and 816 Ma. The paleomagnetic and geochronologic data constrain South China to high latitudes ca. 813 Ma and indicate a relatively stable high-latitude position from ca. 821 to 805 Ma. These high-latitude constraints either connect the craton to Rodinia along its periphery or disconnect it from the supercontinent entirely. The difference in pole position between the pre-Bitter Springs Stage Xiajiang Group pole and the syn-Bitter Springs Stage Madiyi Formation pole is significantly less than that predicted for the Bitter Springs Stage true polar wander hypothesis. If this pole difference is interpreted as true polar wander superimposed upon differential plate motion, it requires South China to have been separate from Rodinia. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187069
作者单位	Department of Earth and Planetary Science, University of California, Berkeley, CA, United States; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, China; Natural Environment Research Council Isotope Geosciences Laboratory, British Geological Survey, Keyworth, United Kingdom; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; Department of Earth Science, University of California, Santa Barbara, CA, United States
推荐引用方式 GB/T 7714	Park Y.,Swanson-Hysell N.L.,Xian H.,et al. A Consistently High-Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large-Scale True Polar Wander[J],2021,126(6).
APA	Park Y..,Swanson-Hysell N.L..,Xian H..,Zhang S..,Condon D.J..,...&Macdonald F.A..(2021).A Consistently High-Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large-Scale True Polar Wander.Journal of Geophysical Research: Solid Earth,126(6).
MLA	Park Y.,et al."A Consistently High-Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large-Scale True Polar Wander".Journal of Geophysical Research: Solid Earth 126.6(2021).