Chemical and carbon isotopic compositions of volatiles in Shuangliao Cenozoic basalts and related mantle xenoliths: Implications for origins of volatiles

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院新生代地质与环境重点实验室

	Chemical and carbon isotopic compositions of volatiles in Shuangliao Cenozoic basalts and related mantle xenoliths: Implications for origins of volatiles
	Gao JinLiang 1,2; Liu JiaQi 1; Guo ZhengFu 1; Meng FanChao 3; Zhai LiNa 4; Li ZhongPing 5
刊名	ACTA PETROLOGICA SINICA
	2017
卷号	33 期号:1 页码:81-92
关键词	Mantle Fluid Chemical Composition Carbon Isotope Basalt Xenolith Shuangliao
ISSN号	1000-0569
文献子类	Article
英文摘要	The mantle fluids hosted in basalts and mantle xenoliths are important for us to understand characteristics of magmatic source and evolution of lithospheric mantle. We have investigated the features of volatiles extracted from basaltic rocks and related xenoliths collected from Shuangliao volcanic field in order to reveal the characteristics and geneses of mantle fluids. Two types of fluid inclusions can be recognized in olivine phenocrysts of Shuangliao basalts and constituent minerals of xenoliths: the early stage and late stage fluid inclusions. The volatiles in early stage of inclusions were trapped during crystallization of minerals and represent the primary volatiles of magmas. The volatiles in late stage of inclusions were trapped by minerals during alteration and metasomatism processes and represent the secondary volatiles. The volatiles in early and late stage of inclusions were released at high temperature interval (600 similar to 1200 degrees C) and low temperature interval (200 similar to 600 degrees C), respectively. Primary volatiles of xenoliths are composed mainly of H2O, CO and H-2 with minor CO2 and CH4. Metasomatic volatiles of xenoliths and primary volatiles in olivine phenocrysts are dominated by H2O and CO2 with minor CO, H-2 and CH4. The primary and metasomatic volatiles in mantle xenoliths and primary volatiles in olivine phenocrysts all contain biogenic CO2 and hydrocarbons. It indicates that biogenic volatiles from organic matters were introduced into lithospheric mantle and magma source of Shuangliao basalts. The biogenic volatiles in magma source of Shuangliao basalts and metasomatic fluids in lithospheric mantle were most likely derived from the sedimentary organic matters in the subducted Pacific slab. The plagioclase phenocrysts and matrix of Shuangliao basalts contain much more volatiles than minerals mentioned above. The volatiles are composed mainly of CO2 and H2O. The delta C-13 values of CO2 are much lower than that extracted from olivine phenocrysts, which can be interpreted as a result of degassing during ascent of magma.
WOS关键词	BENEATH EASTERN CHINA ; CONTINENTAL LITHOSPHERIC MANTLE ; NORTHEAST CHINA ; NE CHINA ; POTASSIC BASALTS ; SONGLIAO BASIN ; CONSTRAINTS ; GEOCHEMISTRY ; EVOLUTION ; VOLCANISM
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000393257900007
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53104]
专题	地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者	Gao JinLiang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Univ Petr, Sch Geosci, Qingdao 266580, Peoples R China 4.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Gao JinLiang,Liu JiaQi,Guo ZhengFu,et al. Chemical and carbon isotopic compositions of volatiles in Shuangliao Cenozoic basalts and related mantle xenoliths: Implications for origins of volatiles[J]. ACTA PETROLOGICA SINICA,2017,33(1):81-92.
APA	Gao JinLiang,Liu JiaQi,Guo ZhengFu,Meng FanChao,Zhai LiNa,&Li ZhongPing.(2017).Chemical and carbon isotopic compositions of volatiles in Shuangliao Cenozoic basalts and related mantle xenoliths: Implications for origins of volatiles.ACTA PETROLOGICA SINICA,33(1),81-92.
MLA	Gao JinLiang,et al."Chemical and carbon isotopic compositions of volatiles in Shuangliao Cenozoic basalts and related mantle xenoliths: Implications for origins of volatiles".ACTA PETROLOGICA SINICA 33.1(2017):81-92.