The volatile conditions of Permian basaltic magmatism in northwestern Junggar basin of Xinjiang, China: Constraints from chemical and carbon isotopic compositions of volatiles in basalts

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	The volatile conditions of Permian basaltic magmatism in northwestern Junggar basin of Xinjiang, China: Constraints from chemical and carbon isotopic compositions of volatiles in basalts
	Zhang MingJie 1; Yu Ming 1; Tang QingYan 1; Yang Yang 1; Chen SiTong 1; Li ZhongPing 2; Shi JiAn 2
刊名	ACTA PETROLOGICA SINICA
	2017
卷号	33 期号:1 页码:93-103
关键词	Origin Carbon Isotope Volatile Permian Basalt Northwestern Junggar Basin China
ISSN号	1000-0569
文献子类	Article
英文摘要	The Carboniferous-Permian basalts are occurred in deep part of northwestern Junggar basin, Xinjiang, China. The volatile conditions of the Permian basaltic magmatism had not been studied. The chemical and carbon isotopic compositions of volatiles in the matrix of Permian basalt cores were measured by stepwise heating mass spectrometer. The results showed that the volatiles in Permian basalts from northwestern Junggar basin were composed of dominated H2O with an average of 13789mm(3). STP/g (STP-standard tempeture and pressure), with minor CO2, O-2, H2S and N-2. The delta C-13 values of CO2 (-28. 9 parts per thousand to -15. 8 parts per thousand) and delta C-13(cH4) (-36. 8 parts per thousand similar to -21. 9 parts per thousand) were plotted in the delta C-13 ranges of crust and methane oxidation. The CH4, C2H6, C3H8, and C4H10 etc. methane homologues showed the normal distribution pattern of carbon isotopic compositions among CH4 to C4H10, which are the carbon isotopic features of thermogenic hydrocarbon gases of organic materials in oceanic sedimentary. The delta C-13 values of CH4 released at 400 similar to 800 degrees C (about -25 parts per thousand) are heavier than those at 200 similar to 400 degrees C (about 35 parts per thousand), and some samples showed partial reversal pattern in CH, to C3H, released at 400 similar to 800 degrees C, suggested that volatiles originated from mantle could be mixed by hydrocarbons from thermally cracked by sedimentary organic materials, which should be volatiles degassed from alterated subducted oceanic sedimentary. Large quatity of H2O indicated the addition of recycled volatiles in arc. The chemical and carbon isotopic compositions of CO2 and CH4 reveal long time alteration of organic materials, and imply long time uplifting after basaltic magmatism.
WOS关键词	BENEATH EASTERN CHINA ; VOLCANIC-ROCKS ; NW CHINA ; GEOCHEMICAL CHARACTERISTICS ; TECTONIC SIGNIFICANCE ; SULFIDE DEPOSITS ; SOUTHERN MARGIN ; WESTERN JUNGGAR ; OROGENIC BELT ; ORIGIN
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000393257900008
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53118]
专题	地质与地球物理研究所_兰州油气中心
通讯作者	Zhang MingJie
作者单位	1.Lanzhou Univ, Sch Earth Sci, Key Lab Mineral Resources Western China Gansu, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Gansu Key Lab Petr Resources, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang MingJie,Yu Ming,Tang QingYan,et al. The volatile conditions of Permian basaltic magmatism in northwestern Junggar basin of Xinjiang, China: Constraints from chemical and carbon isotopic compositions of volatiles in basalts[J]. ACTA PETROLOGICA SINICA,2017,33(1):93-103.
APA	Zhang MingJie.,Yu Ming.,Tang QingYan.,Yang Yang.,Chen SiTong.,...&Shi JiAn.(2017).The volatile conditions of Permian basaltic magmatism in northwestern Junggar basin of Xinjiang, China: Constraints from chemical and carbon isotopic compositions of volatiles in basalts.ACTA PETROLOGICA SINICA,33(1),93-103.
MLA	Zhang MingJie,et al."The volatile conditions of Permian basaltic magmatism in northwestern Junggar basin of Xinjiang, China: Constraints from chemical and carbon isotopic compositions of volatiles in basalts".ACTA PETROLOGICA SINICA 33.1(2017):93-103.