scholarly journals Seismological evidence for the earliest global subduction network at 2 Ga ago

2020 ◽  
Vol 6 (32) ◽  
pp. eabc5491 ◽  
Author(s):  
Bo Wan ◽  
Xusong Yang ◽  
Xiaobo Tian ◽  
Huaiyu Yuan ◽  
Uwe Kirscher ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Plate Tectonics ◽  
North China ◽  
High Density ◽  
Seismic Array ◽  
Close Resemblance

The earliest evidence for subduction, which could have been localized, does not signify when plate tectonics became a global phenomenon. To test the antiquity of global subduction, we investigated Paleoproterozoic time, for which seismic evidence is available from multiple continents. We used a new high-density seismic array in North China to image the crustal structure that exhibits a dipping Moho bearing close resemblance to that of the modern Himalaya. The relict collisional zone is Paleoproterozoic in age and implies subduction operating at least as early as ~2 billion years (Ga) ago. Seismic evidence of subduction from six continents at this age is interpreted as the oldest evidence of global plate tectonics. The sutures identified can be linked in a plate network that resulted in the assembly of Nuna, likely Earth’s first supercontinent. Global subduction by ~2 Ga ago can explain why secular planetary cooling was not appreciable until Proterozoic time.

scholarly journals New images of the crustal structure beneath eastern Tibet from a high-density seismic array

2017 ◽  
Vol 480 ◽  
pp. 33-41 ◽  
Author(s):  
Zhen Liu ◽  
Xiaobo Tian ◽  
Rui Gao ◽  
Gaochun Wang ◽  
Zhenbo Wu ◽  
...  
Keyword(s):  
Crustal Structure ◽  
High Density ◽  
Seismic Array ◽  
Eastern Tibet

High-resolution crustal structure and gold mineralization in the southwest Cathaysia block revealed by a dense seismic array

2021 ◽  
pp. 229012
Author(s):  
Xuelei Li ◽  
Zhiwei Li ◽  
Yufei Xi ◽  
Yutao Shi ◽  
Xiangteng Wang ◽  
...  
Keyword(s):  
High Resolution ◽  
Crustal Structure ◽  
Gold Mineralization ◽  
Seismic Array ◽  
Cathaysia Block ◽  
Dense Seismic Array

Detailed crustal structure of the North China and its implication for seismicity

2014 ◽  
Vol 81 ◽  
pp. 53-64 ◽  
Author(s):  
Wenliang Jiang ◽  
Xin Wang ◽  
Tian Tian ◽  
Jingfa Zhang ◽  
Donglei Wang
Keyword(s):  
Crustal Structure ◽  
North China ◽  
The North

Sediment thickness variations of the Tangshan fault zone in North China from a dense seismic array and microtremor survey

2019 ◽  
Vol 185 ◽  
pp. 104045 ◽  
Author(s):  
Feng Bao ◽  
Zhiwei Li ◽  
Baofeng Tian ◽  
Liaoliang Wang ◽  
Guanghong Tu
Keyword(s):  
Fault Zone ◽  
North China ◽  
Seismic Array ◽  
Sediment Thickness ◽  
Thickness Variations ◽  
Dense Seismic Array ◽  
Microtremor Survey

scholarly journals Crustal structure of Mesozoic rifting in the northeastern Gulf of Mexico from integration of seismic and potential fields data

2019 ◽  
Vol 7 (4) ◽  
pp. T857-T867 ◽  
Author(s):  
Mei Liu ◽  
Irina Filina ◽  
Paul Mann
Keyword(s):  
Gulf Of Mexico ◽  
Crustal Structure ◽  
Late Jurassic ◽  
Phase 1 ◽  
Integrated Approach ◽  
High Density ◽  
Magnetic Data ◽  
Data Sets ◽  
Gravity And Magnetic ◽  
Northeastern Gulf Of Mexico

We have investigated the crustal structure of a 400 km wide zone of thinned continental crust in the northeastern Gulf of Mexico (GOM) using gravity and magnetic modeling along two deeply penetrated seismic transects. Using this approach, we identify two zones of prominent, southward-dipping reflectors associated with 7–10 km thick, dense, and highly magnetic material. Previous workers have interpreted the zones as either coarse clastic redbeds of Mesozoic age that are tilted within half-grabens or seaward-dipping reflectors of magmatic origin. Both seismic reflection lines reveal a 10 km thick and 67 km wide northern zone of high density near the Florida coastline beneath the Apalachicola rift (AR). The southern zone of high density occurs 70 km to the south in the deepwater central GOM along the northern flank of the marginal rift, a 48 km wide, southeast-trending structure of inferred Late Jurassic age that is filled by 3 km of low-density and low-magnetic susceptibility sediments including complexly deformed salt deposits. We propose that these two subparallel rifts and their associated magmatic belts formed in the following sequence: (1) AR formed during Triassic-early Jurassic (210–163 Ma) phase 1 of diffuse continental stretching and was partially infilled on its northern edge by southward-dipping volcanic flows; and (2) the similarly southward-dipping southern magmatic zone formed adjacent to the marginal rift during the early phase 2 of late Jurassic (161–153 Ma) rifting of the GOM continental extension; this southern area of SDR formation immediately preceded the formation of the adjacent oceanic crust that separated the rift-related evaporates into the northern and southern GOM. Our integrated approach combining 2D seismic, gravity, and magnetic data sets results in a more confident delineation of these deep crustal features than from seismic data alone.

Lateral variation of crustal structure in the Ordos block and surrounding regions, North China, and its tectonic implications

2014 ◽  
Vol 387 ◽  
pp. 198-211 ◽  
Author(s):  
Chun-Yong Wang ◽  
E. Sandvol ◽  
L. Zhu ◽  
Hai Lou ◽  
Zhixiang Yao ◽  
...  
Keyword(s):  
Crustal Structure ◽  
North China ◽  
Lateral Variation ◽  
Ordos Block ◽  
Tectonic Implications

scholarly journals Imaging the crustal structure beneath the Yinchuan Basin in the western North China Craton using normalized full gradient and 3D gravity inversion

2022 ◽  
pp. 105087
Author(s):  
Guiju Wu ◽  
Jian Wang ◽  
Bingfei Yu ◽  
Hongbo Tan ◽  
Jiapei Wang ◽  
...  
Keyword(s):  
Crustal Structure ◽  
North China Craton ◽  
North China ◽  
Gravity Inversion ◽  
Normalized Full Gradient ◽  
3D Gravity ◽  
Yinchuan Basin

High-resolution crustal velocity imaging using ambient noise recordings from a high-density seismic array: An example from the Shangrao section of the Xinjiang basin, China

2018 ◽  
Vol 31 (5-6) ◽  
pp. 242-251
Author(s):  
Gaochun Wang ◽  
◽  
Xiaobo Tian ◽  
Lianglei Guo ◽  
Jiayong Yan ◽  
...  
Keyword(s):  
High Resolution ◽  
Ambient Noise ◽  
High Density ◽  
Seismic Array ◽  
Crustal Velocity ◽  
Velocity Imaging

Destruction geodynamics of the North China craton and its Paleoproterozoic plate tectonics

2009 ◽  
Vol 54 (19) ◽  
pp. 3354-3366 ◽  
Author(s):  
RiXiang Zhu ◽  
TianYu Zheng
Keyword(s):  
North China Craton ◽  
Plate Tectonics ◽  
North China ◽  
The North
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