Origin of the Volcanic Rocks Erupted in the Eastern Manus Basin:Basaltic Andesite-Andesite-Dacite Associations

IOCAS-IR

	Origin of the Volcanic Rocks Erupted in the Eastern Manus Basin:Basaltic Andesite-Andesite-Dacite Associations
	MA Yao; ZENG Zhigang ; CHEN Shuai ; YIN Xuebo ; WANG Xiaoyuan
发表期刊	Journal of Ocean University of China
ISSN	1672-5182
	2017-06-06
出版年	2017
卷号	v.16 期号:03 页码:37-50
文献类型	CNKI期刊论文
摘要	There has been much recent interest in the origin of intermediate lava and several hypotheses are: 1) direct melting of the mantle under water-saturated conditions, 2) partial melting of altered crust, 3) fractional crystallization of parent magma, and 4) magma mixing of mafic magmas with dacitic/rhyolitic magmas. Volcanic rocks series ranging from basaltic andesite to dacite(SiO_2 ranges from 53.8 to 63.0 wt.%) from the eastern Manus Basin were detected for major and trace element compositions to understand their origin. Low H_2O contents, positive correlations of La-SiO_2 and Yb-SiO_2, oxygen isotope data and the indistinct change of trace element concentrations in oscillatory zoning of plagioclase phenocrysts rule out the models in which silicic lava results from direct melting of hydrous mantle, partial melting of altered oceanic crust or gabbros, and magma mixing, respectively. Besides, the geochemical data of whole rock and melt inclusions indicate that fractional crystallization plays a dominant role in generating the intermediate lava with subduction features.
关键词	Eastern Manus Basin fractional crystallization volcanic rocks
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A011;
CNKI专题名称	地质学;
分类号	P588.1
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	supported by the National Key Basic Research Program of China (No. 2013CB429700) ; the National Natural Science Foundation of China (Nos. 4132 5021, 41306053, 40476044) ; the Strategic Priority Research Program of the Chinese Academy of Sciences (No XDA11030302) ; the Special Fund for the Taishan Scholar Program of Shandong Province (No. ts201511061) ; the AoShan Talents Program Supported by Qingdao Nationa Laboratory for Marine Science and Technology (No. 2015 ASTP-0S17) ; the Innovative Talent Promotion Program (No. 2012RA2191) ; the Science and Technology Devel opment Program of Shandong Province (No. 2013GRC 31502) ; the Scientific and Technological Innovation Project Financially Supported by Qingdao National Labora tory for Marine Science and Technology (No. 2015ASKJ 03) ; the National High Level Talent Special Support Program ; the CAS/SAFEA International Partnership Program for Creative Research Teams ; the Qingdao Collaborative Innovation Center of Marine Science and Technology
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/189303
专题	中国科学院海洋研究所
作者单位	1.SeafloorHydrothermalActivityLaboratoryoftheKeyLaboratoryofMarineGeologyandEnvironment,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences 3.LaboratoryforMarineMineralResources,QingdaoNationalLaboratoryforMarineScienceandTechnology
推荐引用方式 GB/T 7714	MA Yao,ZENG Zhigang,CHEN Shuai,et al. Origin of the Volcanic Rocks Erupted in the Eastern Manus Basin:Basaltic Andesite-Andesite-Dacite Associations. 2017.