New Paleomagnetic and Chronological Constraints on the Late Triassic Position of the Eastern Qiangtang Terrane: Implications for the Closure of the Paleo-Jinshajiang Ocean

Liang Yu; Maodu Yan; Mathew Domeier; Chong Guan; Miaomiao Shen; Qiang Fu; Wanlong Xu; Zunbo Xu; Zhichao Niu; Liye Yang; Rendeng Shi; Weilin Zhang; Jinbo Zan; Dawen Zhang; Bingshuai Li

doi:10.1029/2021gl096902

New Paleomagnetic and Chronological Constraints on the Late Triassic Position of the Eastern Qiangtang Terrane: Implications for the Closure of the Paleo-Jinshajiang Ocean

Liang Yu, Maodu Yan^*, Mathew Domeier, Chong Guan, Miaomiao Shen, Qiang Fu, Wanlong Xu, Zunbo Xu, Zhichao Niu, Liye Yang, Rendeng Shi, Weilin Zhang, Jinbo Zan, Dawen Zhang, Bingshuai Li

^*Corresponding author for this work

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Research output: Contribution to journal › Letter › Academic › peer-review

Abstract

The tectonic evolution of the Paleo-Jinshajiang Ocean, and in particular the time of its closure, is debated. Here we present new constraints on the evolution of this region from an integrated paleomagnetic and geochronologic study of the Late Triassic Batang Group volcanic rocks in Qamdo, Eastern Qiangtang Terrane (EQT). Two zircon U-Pb ages indicate that the volcanic rocks erupted at ∼227–222 Ma. New paleomagnetic results yield a robust Late Triassic paleopole of 57.6°N, 176.4°E (A₉₅ = 7.8°), corresponding to a paleolatitude of 32.5 ± 7.8°N for the study area. Integrated with other lines of paleomagnetic and geological evidence, we show that the northward drift of the EQT placed it at the same paleolatitude as the Tarim Block by ∼227–222 Ma, which suggests that the Paleo-Jinshajiang Ocean in the Qamdo region closed before that time, and likely around ∼230 Ma.

Original language	English
Article number	e2021GL096902
Pages (from-to)	1-12
Journal	Geophysical Research Letters
Volume	49
Issue number	2
DOIs	https://doi.org/10.1029/2021gl096902
Publication status	Published - 28 Jan 2022
Externally published	Yes

Bibliographical note

Funding Information:
This research was supported by the Second Tibetan Plateau Scientific Expedition Program (Grant 2019QZKK0707), Strategic Priority Research Program of Chinese Academy of Sciences (XDA20070201), the 2020 outstanding members of Youth Innovation Promotion Association, CAS, China (Y202023), the Natural Science Foundation of China (Grants 41988101‐01, 41974080, 42164005), and the State Scholarship Fund, CSC, China (202004910721). Ziqiang Mao, Peiping Song, Zhantao Feng, Deng Zeng, Yongmin Liu, Kang Wu and Shengsheng Chen are thanked for their assistance with the laboratory work and data processing.

Publisher Copyright:
© 2022. American Geophysical Union. All Rights Reserved.

Keywords

Late Triassic
Paleo-Jinshajiang Ocean
Qamdo
Qiangtang-Tarim Block/Songpan-Ganzi Terrane/Yidun Terrane collision
paleomagnetism

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10.1029/2021gl096902

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Yu, L., Yan, M., Domeier, M., Guan, C., Shen, M., Fu, Q., Xu, W., Xu, Z., Niu, Z., Yang, L., Shi, R., Zhang, W., Zan, J., Zhang, D., & Li, B. (2022). New Paleomagnetic and Chronological Constraints on the Late Triassic Position of the Eastern Qiangtang Terrane: Implications for the Closure of the Paleo-Jinshajiang Ocean. Geophysical Research Letters, 49(2), 1-12. Article e2021GL096902. https://doi.org/10.1029/2021gl096902

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title = "New Paleomagnetic and Chronological Constraints on the Late Triassic Position of the Eastern Qiangtang Terrane: Implications for the Closure of the Paleo-Jinshajiang Ocean",

abstract = "The tectonic evolution of the Paleo-Jinshajiang Ocean, and in particular the time of its closure, is debated. Here we present new constraints on the evolution of this region from an integrated paleomagnetic and geochronologic study of the Late Triassic Batang Group volcanic rocks in Qamdo, Eastern Qiangtang Terrane (EQT). Two zircon U-Pb ages indicate that the volcanic rocks erupted at ∼227–222 Ma. New paleomagnetic results yield a robust Late Triassic paleopole of 57.6°N, 176.4°E (A95 = 7.8°), corresponding to a paleolatitude of 32.5 ± 7.8°N for the study area. Integrated with other lines of paleomagnetic and geological evidence, we show that the northward drift of the EQT placed it at the same paleolatitude as the Tarim Block by ∼227–222 Ma, which suggests that the Paleo-Jinshajiang Ocean in the Qamdo region closed before that time, and likely around ∼230 Ma.",

keywords = "Late Triassic, Paleo-Jinshajiang Ocean, Qamdo, Qiangtang-Tarim Block/Songpan-Ganzi Terrane/Yidun Terrane collision, paleomagnetism",

author = "Liang Yu and Maodu Yan and Mathew Domeier and Chong Guan and Miaomiao Shen and Qiang Fu and Wanlong Xu and Zunbo Xu and Zhichao Niu and Liye Yang and Rendeng Shi and Weilin Zhang and Jinbo Zan and Dawen Zhang and Bingshuai Li",

note = "Funding Information: This research was supported by the Second Tibetan Plateau Scientific Expedition Program (Grant 2019QZKK0707), Strategic Priority Research Program of Chinese Academy of Sciences (XDA20070201), the 2020 outstanding members of Youth Innovation Promotion Association, CAS, China (Y202023), the Natural Science Foundation of China (Grants 41988101‐01, 41974080, 42164005), and the State Scholarship Fund, CSC, China (202004910721). Ziqiang Mao, Peiping Song, Zhantao Feng, Deng Zeng, Yongmin Liu, Kang Wu and Shengsheng Chen are thanked for their assistance with the laboratory work and data processing. Publisher Copyright: {\textcopyright} 2022. American Geophysical Union. All Rights Reserved.",

year = "2022",

month = jan,

day = "28",

doi = "10.1029/2021gl096902",

language = "English",

volume = "49",

pages = "1--12",

journal = "Geophysical Research Letters",

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Yu, L, Yan, M, Domeier, M, Guan, C, Shen, M, Fu, Q, Xu, W, Xu, Z, Niu, Z, Yang, L, Shi, R, Zhang, W, Zan, J, Zhang, D & Li, B 2022, 'New Paleomagnetic and Chronological Constraints on the Late Triassic Position of the Eastern Qiangtang Terrane: Implications for the Closure of the Paleo-Jinshajiang Ocean', Geophysical Research Letters, vol. 49, no. 2, e2021GL096902, pp. 1-12. https://doi.org/10.1029/2021gl096902

New Paleomagnetic and Chronological Constraints on the Late Triassic Position of the Eastern Qiangtang Terrane: Implications for the Closure of the Paleo-Jinshajiang Ocean. / Yu, Liang; Yan, Maodu; Domeier, Mathew et al.
In: Geophysical Research Letters, Vol. 49, No. 2, e2021GL096902, 28.01.2022, p. 1-12.

Research output: Contribution to journal › Letter › Academic › peer-review

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T2 - Implications for the Closure of the Paleo-Jinshajiang Ocean

AU - Yu, Liang

AU - Yan, Maodu

AU - Domeier, Mathew

AU - Guan, Chong

AU - Shen, Miaomiao

AU - Fu, Qiang

AU - Xu, Wanlong

AU - Xu, Zunbo

AU - Niu, Zhichao

AU - Yang, Liye

AU - Shi, Rendeng

AU - Zhang, Weilin

AU - Zan, Jinbo

AU - Zhang, Dawen

AU - Li, Bingshuai

N1 - Funding Information: This research was supported by the Second Tibetan Plateau Scientific Expedition Program (Grant 2019QZKK0707), Strategic Priority Research Program of Chinese Academy of Sciences (XDA20070201), the 2020 outstanding members of Youth Innovation Promotion Association, CAS, China (Y202023), the Natural Science Foundation of China (Grants 41988101‐01, 41974080, 42164005), and the State Scholarship Fund, CSC, China (202004910721). Ziqiang Mao, Peiping Song, Zhantao Feng, Deng Zeng, Yongmin Liu, Kang Wu and Shengsheng Chen are thanked for their assistance with the laboratory work and data processing. Publisher Copyright: © 2022. American Geophysical Union. All Rights Reserved.

PY - 2022/1/28

Y1 - 2022/1/28

N2 - The tectonic evolution of the Paleo-Jinshajiang Ocean, and in particular the time of its closure, is debated. Here we present new constraints on the evolution of this region from an integrated paleomagnetic and geochronologic study of the Late Triassic Batang Group volcanic rocks in Qamdo, Eastern Qiangtang Terrane (EQT). Two zircon U-Pb ages indicate that the volcanic rocks erupted at ∼227–222 Ma. New paleomagnetic results yield a robust Late Triassic paleopole of 57.6°N, 176.4°E (A95 = 7.8°), corresponding to a paleolatitude of 32.5 ± 7.8°N for the study area. Integrated with other lines of paleomagnetic and geological evidence, we show that the northward drift of the EQT placed it at the same paleolatitude as the Tarim Block by ∼227–222 Ma, which suggests that the Paleo-Jinshajiang Ocean in the Qamdo region closed before that time, and likely around ∼230 Ma.

AB - The tectonic evolution of the Paleo-Jinshajiang Ocean, and in particular the time of its closure, is debated. Here we present new constraints on the evolution of this region from an integrated paleomagnetic and geochronologic study of the Late Triassic Batang Group volcanic rocks in Qamdo, Eastern Qiangtang Terrane (EQT). Two zircon U-Pb ages indicate that the volcanic rocks erupted at ∼227–222 Ma. New paleomagnetic results yield a robust Late Triassic paleopole of 57.6°N, 176.4°E (A95 = 7.8°), corresponding to a paleolatitude of 32.5 ± 7.8°N for the study area. Integrated with other lines of paleomagnetic and geological evidence, we show that the northward drift of the EQT placed it at the same paleolatitude as the Tarim Block by ∼227–222 Ma, which suggests that the Paleo-Jinshajiang Ocean in the Qamdo region closed before that time, and likely around ∼230 Ma.

KW - Late Triassic

KW - Paleo-Jinshajiang Ocean

KW - Qamdo

KW - Qiangtang-Tarim Block/Songpan-Ganzi Terrane/Yidun Terrane collision

KW - paleomagnetism

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U2 - 10.1029/2021gl096902

DO - 10.1029/2021gl096902

M3 - Letter

SN - 1944-8007

VL - 49

SP - 1

EP - 12

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 2

M1 - e2021GL096902

ER -

New Paleomagnetic and Chronological Constraints on the Late Triassic Position of the Eastern Qiangtang Terrane: Implications for the Closure of the Paleo-Jinshajiang Ocean

Abstract

Bibliographical note

Keywords

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