North China block underwent simultaneous true polar wander and tectonic convergence in late Jurassic: New paleomagnetic constraints

2021 ◽  
Vol 567 ◽  
pp. 117012
Author(s):  
Yangjun Gao ◽  
Shihong Zhang ◽  
Hanqing Zhao ◽  
Qiang Ren ◽  
Tianshui Yang ◽  
...  
Keyword(s):  
Late Jurassic ◽  
North China ◽  
North China Block ◽  
Polar Wander ◽  
True Polar Wander

Enigma of the Jurassic monster shift of the North China block

2020 ◽  
Author(s):  
Shihong Zhang ◽  
Yangjun Gao ◽  
Qiang Ren
Keyword(s):  
North China ◽  
Rotation Axis ◽  
Eastern Asia ◽  
North China Block ◽  
Polar Wander ◽  
Plate Convergence ◽  
True Polar Wander ◽  
The North ◽  
Geochronological Study ◽  
Oceanic Plates

<p>Accumulation of the global paleomagnetic data, from both continental and oceanic plates, may suggest a true polar wander (TPW) event in Jurassic, with a rotation axis located in the present northwestern Africa, but no consensus has been reached regarding to the initiation, duration and velocity of the TPW. As one of the eastern Asian blocks, the north China block (NCB) is then located far from the rotation axis of the TPW and the plate convergence between Siberia and the Amur-NCB, known as the subduction in the Mesozoic Okhotsk-Baikal ocean, did exist. Paleogeographic changes observed of the eastern Asian blocks in Jurassic thus should contain the TPW component and plate moving component. To better estimate the influence of the TPW in the Eastern Asia blocks, we carried out a new paleomagnetic and precision U-Pb geochronological study on the middle Jurassic lavas in the NCB. Being profoundly different to the recent paleogeographic model (Yi et al., 2019, https://doi .org/10.1130/G46641.1) that suggest that the NCB experienced a large latitudinal displacement (monster-shift) responding to the TPW event between ~174 and ~157 Ma, we suggest that the NCB, as well as other blocks already connected with it, do not record any monster-shift between ~170 and ~160 Ma. The strata, ranging from 160 to 145 Ma, however, yield considerable paleomagnetic variations and need further investigation.</p>

scholarly journals The Apparent Polar Wander Path For the North China Block Since the Jurassic

1991 ◽  
Vol 104 (1) ◽  
pp. 29-40 ◽  
Author(s):  
Zhong Zheng ◽  
Masaru Kono ◽  
Hideo Tsunakawa ◽  
Gaku Kimura ◽  
Qingyun Wei ◽  
...  
Keyword(s):  
North China ◽  
North China Block ◽  
Polar Wander ◽  
The North ◽  
Apparent Polar Wander Path

scholarly journals Testing the occurrence of Late Jurassic true polar wander using the La Negra volcanics of northern Chile

2020 ◽  
Vol 529 ◽  
pp. 115835 ◽  
Author(s):  
Roger R. Fu ◽  
Dennis V. Kent ◽  
Sidney R. Hemming ◽  
Pablo Gutiérrez ◽  
Jessica R. Creveling
Keyword(s):  
Late Jurassic ◽  
Northern Chile ◽  
Polar Wander ◽  
True Polar Wander

Apparent polar wander path and tectonic movement of the North China Block in Phanerozoic

1998 ◽  
Vol 41 (S2) ◽  
pp. 51-65 ◽  
Author(s):  
Yang Zhenyu ◽  
Ma Xinghua ◽  
Huang Baochun ◽  
Sun Zhiming ◽  
Zhou Yaoxiu
Keyword(s):  
North China ◽  
Tectonic Movement ◽  
North China Block ◽  
Polar Wander ◽  
The North ◽  
Apparent Polar Wander Path

Preliminary Proterozoic apparent polar wander paths for the South China Block and their tectonic implications

1998 ◽  
Vol 35 (3) ◽  
pp. 302-320 ◽  
Author(s):  
Huimin Zhang
Keyword(s):  
South China ◽  
North China ◽  
Eastern China ◽  
North China Block ◽  
Polar Wander ◽  
Late Proterozoic ◽  
The North ◽  
Apparent Polar Wander Path ◽  
Paleomagnetic Study ◽  
Middle Proterozoic

Results of a regional paleomagnetic study of Precambrian rocks in central-east China are summarized and interpreted. The study is a partial outcome of a geoscience transect incorporating three terranes, namely the Yangzi, Jiangnan, and Huaxia blocks. Paleomagnetic poles derived from a range of metamorphic, igneous, and sedimentary rocks define a northeast to southwest swath crossing the present Pacific Ocean and interpreted to embrace Early to Late Proterozoic times. All three terranes define segments of the same swath and correlate with a similar apparent polar wander path previously defined from the North China Block. The results imply that the constituent blocks of eastern China formed a united block during Early to Middle Proterozoic times. Later relatively large fragmentation is confirmed by Late Proterozoic apparent polar wander path records of the North China and South China Blocks.

A true polar wander trigger for the Great Jurassic East Asian Aridification

Geology ◽  
2019 ◽  
Vol 47 (12) ◽  
pp. 1112-1116 ◽  
Author(s):  
Zhiyu Yi ◽  
Yongqing Liu ◽  
Joseph G. Meert
Keyword(s):  
Environmental Change ◽  
East Asia ◽  
Late Jurassic ◽  
Large Scale ◽  
Arid Zone ◽  
East Asian ◽  
Volcanic Rocks ◽  
Jehol Biota ◽  
Polar Wander ◽  
True Polar Wander

Abstract A drastic environmental change occurred during the Middle to Late Jurassic as much of East Asia transitioned from a wet seasonal to an extremely arid climate. The timing, scope, and especially mechanism for this aridification are contentious. In this study, we report paleomagnetic data and ages from Jurassic volcanic rocks in North China and for the first time reveal a large-scale southward displacement of ∼25° for the Eastern Asian blocks (EABs) sometime between 174 ± 6 Ma and 157 ± 4 Ma. We suggest that the rapid motion documented by our paleomagnetic studies resulted from large-scale true polar wander (TPW). The TPW rotation displaced the EABs from the Northern Hemisphere humid-temperate belt into the subtropical/tropical arid zone. The resultant latitudinal motion coincided with a remarkable environmental change recorded over 10,000,000 km2 in East Asia between ca. 165 Ma and 155 Ma. We call the climate transition the “Great Jurassic East Asian Aridification” and argue that TPW-induced climatic shifts were also responsible for the demise of the Yanliao Biota and subsequent radiation of the Jehol Biota during the Late Jurassic and Early Cretaceous.

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