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兰州大学机构库  > 地质科学与矿产资源学院  > 期刊论文
题名: 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
作者: Zhang, MJ; Yu, M; Tang, QY; Yang, Y; Chen, ST; Li, ZP; Shi, JA
收录类别: SCIE
出版日期: 2017-01
刊名: ACTA PETROLOGICA SINICA
卷号: 33, 期号:1-1, 页码:93-103
期刊主办单位: 中国矿物岩石地球化学学会 ; 中国科学院地质与地球物理研究所
出版者: SCIENCE CHINA PRESS
出版地: BEIJING
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.
关键词: Origin ; Carbon isotope ; Volatile ; Permian basalt ; Northwestern Junggar basin ; China
作者部门: [Zhang MingJie ; Yu Ming ; Tang QingYan ; Yang Yang ; Chen SiTong] Lanzhou Univ, Sch Earth Sci, Key Lab Mineral Resources Western China Gansu, Lanzhou 730000, Peoples R China ; [Li ZhongPing ; Shi JiAn] Chinese Acad Sci, Inst Geol & Geophys, Gansu Key Lab Petr Resources, Lanzhou 730000, Peoples R China
通讯作者: Zhang, MJ (reprint author), Lanzhou Univ, Sch Earth Sci, Key Lab Mineral Resources Western China Gansu, Lanzhou 730000, Peoples R China.
学科分类: Geology
文章类型: Article
语种: 中文
ISSN号: 1000-0569
WOS记录号: WOS:000393257900008
IR记录号: WOS:000393257900008
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189136
Appears in Collections:地质科学与矿产资源学院_期刊论文

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Recommended Citation:
Zhang, MJ,Yu, M,Tang, QY,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(1-1):93-103.
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