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DOI	10.1016/j.jvolgeores.2015.09.018
	Geochemical and Sr-Nd isotopic constraints on the petrogenesis of late Cenozoic basalts from the Abaga area, Inner Mongolia, eastern China
	Chen, Sheng-Sheng; Fan, Qi-Cheng; Zou, Hai-Bo; Zhao, Yong-Wei; Shi, Ren-Deng
通讯作者	Chen, SS (通讯作者)
发表日期	2015
ISSN	0377-0273
EISSN	1872-6097
起始页码	30
结束页码	44
卷号	305
英文摘要	Over the past 30 years, the Cenozoic basalts in eastern China have been the subject of many investigations, but their origin remains highly controversial. The Abaga-Dalinuoer volcanic field in Inner Mongolia consists of an approximately 10,000 km(2) lava plateau and more than 300 volcanic cones and extends northwestward to the adjacent Dariganga lava plateau of Mongolia, forming one of the largest Cenozoic volcanic fields in eastern Asia. In this paper, we concentrate on the Abaga volcanic field that comprises more than 200 monogenetic cones, including scoria cones, lava flows, and maars. Phreatomagmatism has contributed to the generation of several volcanic edifices, and the diameter of the maars craters can reach 3 to 6 km, which are among the largest in eastern China. The volcanic rocks in the Abaga area can be divided into alkaline basalts and tholeiites. According to trace element and Sr-Nd isotopic characteristics, the Abaga magmas were primarily derived from a relatively homogeneous garnet peridotite source within the asthenosphere. Variable degrees and depths of partial melting played a key role in the genesis of magma from alkaline basalts to tholeiites. In contrast to the surrounding Cenozoic volcanic fields, such as Datong, Jining, and Hanuoba, in the western block of the North China Craton, the Abaga volcanic region in the southern part of the Central Asian Orogenic Belt is distinguished by the deepest melting and the thickest lithosphere. Negative Ba-, Rb-, K-, and Ti anomalies and relatively high Sr-82/Sr-86 ratios suggest the presence of residual phlogopite/amphibole during mantle melting. The origin of the Abaga magma most likely required involvement of fluids released from the stagnant Pacific slab in the mantle transition zone. (C) 2015 Elsevier B.V. All rights reserved.
关键词	ELEMENT PARTITION-COEFFICIENTS PARTIAL MELTING EXPERIMENTS RARE-EARTH-ELEMENTS TRACE-ELEMENT LITHOSPHERIC MANTLE NORTH CHINA VOLCANIC-ROCKS CHEMICAL CLASSIFICATION PERIDOTITE XENOLITHS CONTINENTAL-CRUST
英文关键词	Abaga basalt; Geochemistry; Petrogenesis; Asthenospheric mantle source; Inner Mongolia; China
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000364893900003
来源期刊	JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258556
推荐引用方式 GB/T 7714	Chen, Sheng-Sheng,Fan, Qi-Cheng,Zou, Hai-Bo,et al. Geochemical and Sr-Nd isotopic constraints on the petrogenesis of late Cenozoic basalts from the Abaga area, Inner Mongolia, eastern China[J]. 中国科学院青藏高原研究所,2015,305.
APA	Chen, Sheng-Sheng,Fan, Qi-Cheng,Zou, Hai-Bo,Zhao, Yong-Wei,&Shi, Ren-Deng.(2015).Geochemical and Sr-Nd isotopic constraints on the petrogenesis of late Cenozoic basalts from the Abaga area, Inner Mongolia, eastern China.JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH,305.
MLA	Chen, Sheng-Sheng,et al."Geochemical and Sr-Nd isotopic constraints on the petrogenesis of late Cenozoic basalts from the Abaga area, Inner Mongolia, eastern China".JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 305(2015).