气候变化领域集成服务门户(CCPortal): Paleomagnetic and Chronologic Data Bearing on the Permian/Triassic Boundary Position of Qamdo in the Eastern Qiantang Terrane: Implications for the Closure of the Paleo-Tethys

CCPortal

DOI	10.1029/2020GL092059
	Paleomagnetic and Chronologic Data Bearing on the Permian/Triassic Boundary Position of Qamdo in the Eastern Qiantang Terrane: Implications for the Closure of the Paleo-Tethys
	Guan, Chong; Yan, Maodu; Zhang, Weilin; Zhang, Dawen; Fu, Qiang; Yu, Liang; Xu, Wanlong; Zan, Jinbo; Li, Bingshuai; Zhang, Tao; Shen, Miaomiao
通讯作者	Yan, MD ; Zhang, WL (通讯作者)
发表日期	2021
ISSN	0094-8276
EISSN	1944-8007
卷号	48 期号:6
英文摘要	The tectonic evolution of the eastern Paleo-Tethys in the Three-Rivers headwater region remains uncertain, especially because of the lack of quality paleomagnetic data from the east Eastern Qiangtang Terrane (EQT). Here, we present an integrated paleomagnetic and zircon U-Pb geochronologic study of the Gadikao Formation (Fm.) volcanic rocks in the EQT. This previously assumed Carboniferous or Permian rock unit is now zircon U-Pb dated to similar to 254-248 Ma. Our new high quality (29 sites and 257 samples) inferred primary paleomagnetic results yield a robust Permo-Triassic boundary paleopole of 59.7 degrees N and 228.2 degrees E (A(95) = 3.3 degrees), with a paleolatitude of 10.0 +/- 3.3 degrees N for the study area. Integrated with other reliable Permo-Triassic paleomagnetic data of the EQT and the Tarim Block and other lines of geologic evidence, we propose that the EQT drifted continuously northward during 300-200 Ma and the Paleo-Tethys Ocean probably closed at similar to 232-220 Ma around the Qamdo region, most likely at 230 Ma.
英文关键词	Eastern Paleo‐ Tethys Ocean; paleomagnetism; Permo‐ Triassic boundary; Qamdo; Qiangtang‐ Tarim collision
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000635209100065
来源期刊	GEOPHYSICAL RESEARCH LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260402
推荐引用方式 GB/T 7714	Guan, Chong,Yan, Maodu,Zhang, Weilin,et al. Paleomagnetic and Chronologic Data Bearing on the Permian/Triassic Boundary Position of Qamdo in the Eastern Qiantang Terrane: Implications for the Closure of the Paleo-Tethys[J]. 中国科学院青藏高原研究所,2021,48(6).
APA	Guan, Chong.,Yan, Maodu.,Zhang, Weilin.,Zhang, Dawen.,Fu, Qiang.,...&Shen, Miaomiao.(2021).Paleomagnetic and Chronologic Data Bearing on the Permian/Triassic Boundary Position of Qamdo in the Eastern Qiantang Terrane: Implications for the Closure of the Paleo-Tethys.GEOPHYSICAL RESEARCH LETTERS,48(6).
MLA	Guan, Chong,et al."Paleomagnetic and Chronologic Data Bearing on the Permian/Triassic Boundary Position of Qamdo in the Eastern Qiantang Terrane: Implications for the Closure of the Paleo-Tethys".GEOPHYSICAL RESEARCH LETTERS 48.6(2021).