Moho depth and deep crustal structure in the land and seas of China and adjacent areas : An example of the Altay-Bashi Channel profile

doi:10.6038/cjg20141207

	Moho depth and deep crustal structure in the land and seas of China and adjacent areas : An example of the Altay-Bashi Channel profile
	Hu Wei-Jian 1; Hao Tian-Yao 1; Qin Jing-Xin 1,2; Li Zhi-Wei 3; Jiang Wei-Wei ; Jiang Di-Di 1; Xing Jian 1; Hu Li-Tian 1; Xu Ya 1; Lei Shou-Min 4
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2014-12-01
卷号	57 期号:12 页码:3932-3943
关键词	Land and seas of China Altay-Bashi Channel profile Crustal structure Moho Gravity
ISSN号	0001-5733
DOI	10.6038/cjg20141207
文献子类	Article
英文摘要	The study on Moho depth and crustal structure in the land and seas of China is one of the focused issues for research on macro-structural framework of East Asia. In this paper, the Moho depth in the land and seas of China and adjacent areas is calculated through sub-regional gravity data inversion with deep seismic sounding data as constraints. The Moho depths are divided on the basis of crust characters combined with the distribution of Moho depth gradient belts and characteristics of Moho depth distribution in each sub-region are summarized. The density structure of the Altay-Bashi Channel profile is established by gravity and seismic joint inversion. The Moho depth and deep structure of the profile can clearly reflect the tectonic framework of "three horizontals and two verticals, two Triangles" in China. On the north side of Kunlun-Qin Ling-Dabie horizontal, the Moho depth in the Junggar massive and Sino-Korean platform changes from 45 to 50 km, while between the Kunlun-Qinling-Dabie horizontal and Helan Mountain-Longmen Mountains vertical, the Moho depth in the Qilian, Qaidam to Songpan-Ganze shows a W-shape relief. The Moho depth in the north Qilian block is 50 km and deepens to 68 km, rises to 58 km in the Qaidam Basin, extends downward to 68 km in the Ainyemagen Mountains, and uplifts gradually southward. It is 44 km in the Sichuan Basin. Across the Da Hinggan Ling-Taihang-Mountains-Wuling Mountain vertical stepped uplift, it is 35 km in the South China fold belt. The Moho depth uplifts slowly in the south side of Jiangshao-Nanling, 20 similar to 25 km deep in the northern continental shelf of South China Sea. In the Bashi Channel, the Moho is complicated due to eastward subduction of the South China Sea along the Manila trench. There is a low-speed, low-density body in the middle and lower crust of the Qilian block and Qaidam block, suggesting it may be caused by partial melting, and existence of the crust material flow channel in the northeastern margin of the Tibetan Plateau.
WOS关键词	VELOCITY STRUCTURE ; GRAVITY-ANOMALIES ; UPPERMOST MANTLE ; TIBETAN PLATEAU ; MARGIN ; TOMOGRAPHY ; MAINLAND ; TRANSECT ; TAIWAN ; TAGH
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000347270700008
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85980]
专题	中国科学院地质与地球物理研究所
通讯作者	Hu Wei-Jian
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China 4.Minist Land & Resources China, Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Hu Wei-Jian,Hao Tian-Yao,Qin Jing-Xin,et al. Moho depth and deep crustal structure in the land and seas of China and adjacent areas : An example of the Altay-Bashi Channel profile[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(12):3932-3943.
APA	Hu Wei-Jian.,Hao Tian-Yao.,Qin Jing-Xin.,Li Zhi-Wei.,Jiang Wei-Wei.,...&Lei Shou-Min.(2014).Moho depth and deep crustal structure in the land and seas of China and adjacent areas : An example of the Altay-Bashi Channel profile.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(12),3932-3943.
MLA	Hu Wei-Jian,et al."Moho depth and deep crustal structure in the land and seas of China and adjacent areas : An example of the Altay-Bashi Channel profile".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.12(2014):3932-3943.