气候变化领域集成服务门户(CCPortal): Lithosphere Mantle Density of the North China Craton

CCPortal

DOI	10.1029/2020JB020296
	Lithosphere Mantle Density of the North China Craton
	Xia B.; Thybo H.; Artemieva I.M.
发表日期	2020
ISSN	21699313
卷号	125 期号:9
英文摘要	We constrain the lithospheric mantle density of the North China Craton (NCC) at both in situ and standard temperature-pressure (STP) conditions from gravity data. The lithosphere-asthenosphere boundary (LAB) depth is constrained by our new thermal model, which is based on a new regional heat flow data set and a recent regional crustal model NCcrust. The new thermal model shows that the thermal lithosphere thickness is <120 km in most of the NCC, except for the northern and southern parts with the maximum depth of 170 km. The gravity calculations reveal a highly heterogeneous density structure of the lithospheric mantle with in situ and STP values of 3.22–3.29 and 3.32–3.40 g/cm3, respectively. Thick and reduced-density cratonic-type lithosphere is preserved mostly in the southern NCC. Most of the Eastern Block has a thin (90–140 km) and high-density lithospheric mantle. Most of the Western Block has a high-density lithospheric mantle and a thin (80–110 km) lithosphere typical of Phanerozoic regions, which suggests that the Archean lithosphere is no longer present there. We conclude that in almost the entire NCC the lithosphere has lost its cratonic characteristics by geodynamic processes that include, but are not limited to, the Paleozoic closure of the Paleo-Asian Ocean in the north, the Mesozoic Yangtze Craton flat subduction in the south, the Mesozoic Pacific subduction in the east, the Cenozoic remote response to the Indian-Eurasian collision in the west, and the Cenozoic extensional tectonics (possibly associated with the slab roll-back) in the center. © 2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187595
作者单位	State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Science, China University of Geosciences, Wuhan, China; Geology Section, Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark; Eurasia Institute of Earth Sciences, Istanbul Technical University, Istanbul, Turkey; Center for Earth Evolution and Dynamics, University of Oslo, Oslo, Norway; Department of Geophysics, Stanford University, Stanford, CA, United States; Section of Marine Geodynamics, GEOMAR Helmholtz Center for Ocean Research, Kiel, Germany
推荐引用方式 GB/T 7714	Xia B.,Thybo H.,Artemieva I.M.. Lithosphere Mantle Density of the North China Craton[J],2020,125(9).
APA	Xia B.,Thybo H.,&Artemieva I.M..(2020).Lithosphere Mantle Density of the North China Craton.Journal of Geophysical Research: Solid Earth,125(9).
MLA	Xia B.,et al."Lithosphere Mantle Density of the North China Craton".Journal of Geophysical Research: Solid Earth 125.9(2020).