准噶尔盆地及邻区地壳磁性特征及其构造意义

孙石达; 陈超; 杜劲松; 许顺芳; 胡正旺; 王秋革

doi:10.3799/dqkx.2016.099

Volume 41 Issue 7

Jul. 2016

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Article Navigation > Earth Science > 2016 > 41(7): 1216-1224

Sun Shida, Chen Chao, Du Jinsong, Xu Shunfang, Hu Zhengwang, Wang Qiuge, 2016. Magnetic Characteristics and Tectonic Implications of Crust in Junggar Basin and Its Surroundings. Earth Science, 41(7): 1216-1224. doi: 10.3799/dqkx.2016.099

Citation:

Sun Shida, Chen Chao, Du Jinsong, Xu Shunfang, Hu Zhengwang, Wang Qiuge, 2016. Magnetic Characteristics and Tectonic Implications of Crust in Junggar Basin and Its Surroundings. Earth Science, 41(7): 1216-1224. doi: 10.3799/dqkx.2016.099

Citation:

Sun Shida, Chen Chao, Du Jinsong, Xu Shunfang, Hu Zhengwang, Wang Qiuge, 2016. Magnetic Characteristics and Tectonic Implications of Crust in Junggar Basin and Its Surroundings. Earth Science, 41(7): 1216-1224. doi: 10.3799/dqkx.2016.099

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Magnetic Characteristics and Tectonic Implications of Crust in Junggar Basin and Its Surroundings

doi: 10.3799/dqkx.2016.099

Sun Shida^{1,2
,},
Chen Chao^{1,2
,
,},
Du Jinsong^1,2,
Xu Shunfang^1,2,
Hu Zhengwang^1,2,
Wang Qiuge^1,2

1.
Institute of Geophysics & Geomatics, China University of Geosciences, Wuhan 430074, China
2.
Hubei Key Laboratory of Subsurface Multi-Scale Imaging, China University of Geosciences, Wuhan 430074, China

Received Date: 2015-10-30
Publish Date: 2016-07-15

Abstract

Abstract

The Junggar block can be divided into east, west Junggar tectonic zones and Junggar basin. Since the Paleozoic, large scale volcanic activity and complex tectonic evolution occurred in the Junggar basin and its surroundings. There have long been controversies on the basement of the Junggar basin, its structure relationship with its surroundings and its evolution. In this paper, we use the EMAG2 lithospheric magnetic anomaly model, together with modern 3D inversion technique, to image the crustal magnetic susceptibility of the Junggar basin and its surroundings, and to obtain the magnetic structure of the 0-60 km depth range. The inversion results show that the magnetic structure of the crust in central Junggar basin is relatively complete, the west Junggar crust has a magnetic structure associated with subduction of oceanic crust arc environment, and both the east Junggar and the Turpan basin have thick and continuous magnetic layer with paleo-continental basement features. Moreover, the crustal magnetic susceptibility anomaly shows the regional fault structure and its deep extension features, and existence of concealed deep fault zone in the covered area as well. The quantitative explanation of the origin of the magnetic anomaly in this area provided in this paper can be useful information and reference for the further analysis of the relationship between the lithosphere structure and the surrounding tectonic units in Junggar area.
- lithospheric magnetic anomaly,
- Junggar,
- crustal magnetic structure,
- 3D inversion,
- tectonic structure,
- tectonic geology

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References(61)

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Magnetic Characteristics and Tectonic Implications of Crust in Junggar Basin and Its Surroundings

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