气候变化领域集成服务门户(CCPortal): The Lithospheric Thickness Control on the Compositional Variation of Continental Intraplate Basalts: A Demonstration Using the Cenozoic Basalts and Clinopyroxene Megacrysts From Eastern China

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DOI	10.1029/2019JB019315
	The Lithospheric Thickness Control on the Compositional Variation of Continental Intraplate Basalts: A Demonstration Using the Cenozoic Basalts and Clinopyroxene Megacrysts From Eastern China
	Sun P.; Niu Y.; Guo P.; Duan M.; Wang X.; Gong H.; Xiao Y.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	Studies on intraplate ocean island basalts have demonstrated the control of lithosphere thickness on the extent of melting and pressure of melt extraction (i.e., the lid effect). However, whether lithosphere thickness also controls the composition of within-continent basalts remains unclear. Here, we test this hypothesis by studying the Cenozoic basalts contaitning clinopyroxene megacrysts from 10 localities throughout eastern continental China with a north-south spatial coverage in excess of 2,500 km. Indeed, the geochemical parameters (e.g., abundances and ratios of major and trace elements) correlate well with the depth of the lithosphere-asthenosphere boundary (LAB) calculated using the clinopyroxene barometry, showing significant lithospheric thickness control on basalt compositions. These observations offer further evidence for melt pooling (a melt rich layer) close beneath the LAB as a “stable magma reservoir” for crystallizing compositionally uniform clinopyroxene megacrysts to be carried by subsequent pulses of melt transport and eruption. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	clinopyroxene megacrysts; compositional variation; continental intraplate basalts; lid effect; lithosphere thickness control; thermobarometry
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/187926
作者单位	Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Department of Earth Sciences, Durham University, Durham, United Kingdom; School of Earth Science and Resources, China University of Geosciences, Beijing, China
推荐引用方式 GB/T 7714	Sun P.,Niu Y.,Guo P.,et al. The Lithospheric Thickness Control on the Compositional Variation of Continental Intraplate Basalts: A Demonstration Using the Cenozoic Basalts and Clinopyroxene Megacrysts From Eastern China[J],2020,125(3).
APA	Sun P..,Niu Y..,Guo P..,Duan M..,Wang X..,...&Xiao Y..(2020).The Lithospheric Thickness Control on the Compositional Variation of Continental Intraplate Basalts: A Demonstration Using the Cenozoic Basalts and Clinopyroxene Megacrysts From Eastern China.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Sun P.,et al."The Lithospheric Thickness Control on the Compositional Variation of Continental Intraplate Basalts: A Demonstration Using the Cenozoic Basalts and Clinopyroxene Megacrysts From Eastern China".Journal of Geophysical Research: Solid Earth 125.3(2020).