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Isotope geochemistry of volcanic rocks from the Barton Peninsula, King George Island, Antarctica

文献类型：期刊论文

作者Hwang, Jeong1; Zheng Xiangshen2; Ripley, Edward M.3; Lee, Jong-Ik4; Shin, Dongbok5
刊名JOURNAL OF EARTH SCIENCE
出版日期2011-02-01
卷号22期号:1页码:40-51
关键词isotope volcanic rock high temperature alteration Antarctica
ISSN号1674-487X
DOI10.1007/s12583-011-0156-y
文献子类Article
英文摘要C, O, H, S and Sr isotopes were investigated to characterize the isotopic composition of the Paleocene-Eocene volcanic rocks in Barton Peninsula, King George Island, Antarctica. The analyzed samples of volcanic rocks cover a range from basalt to andesite. The delta C-13 and delta O-18 values of calcite in volcanic rocks range from -7.5aEuro degrees to -3.2aEuro degrees and 0.4aEuro degrees to 5.1aEuro degrees, respectively. The homogenous delta C-13(cal) and depleted delta O-18(cal) values relative to primary magmatic values reflect the effect of high temperature alteration of volcanic rocks. The delta O-18 of volcanic rocks ranges from -1.1aEuro degrees to 7.2aEuro degrees, and the majority of values are significantly lower than those of primary magmatic values. The low delta O-18(WR) values are compatible with high temperature alteration. The initial values of Sr-87/Sr-86 of volcanic rocks span a narrow range from 0.703 312 to 0.703 504 which belong to the present mid-oceanic ridge basalt. The values of Sr-87/Sr-86 of volcanics in the Barton Peninsula are similar to those determined in the Fildes Peninsula, King George Island. The delta D-WR and H2O contents of volcanic rocks range from -74aEuro degrees to -66aEuro degrees and 0.67 wt.% to 2.74 wt.%, respectively. The higher delta D-WR and H2O wt.% of volcanic rocks relative to fresh basalts also result from high temperature alteration. Sulfur isotope compositions of the volcanic rocks range from -12.5aEuro degrees to -7.0aEuro degrees; these values may represent fractionation accompanying partial oxidation of magmatic S or incorporation of some bacteriogenic sulfide. The low S contents and negative correlation with C and H2O reflect the formation of calcite and breakdown of sulfide as a result of high temperature water-rock interaction.
WOS关键词SOUTH-SHETLAND-ISLANDS ; HYDROTHERMAL ALTERATION ; SULFUR SATURATION ; SUBDUCTION ZONES ; OCEANIC-CRUST ; IGNEOUS ROCKS ; OXYGEN ; ARC ; SYSTEMATICS ; BASALTS
WOS研究方向Geology
语种英语
WOS记录号WOS:000286675000005
出版者CHINA UNIV GEOSCIENCES
资助机构KOPRI(PP10030) ; KOPRI(PP10030) ; KOPRI(PP10030) ; KOPRI(PP10030) ; KOPRI(PP10030) ; KOPRI(PP10030) ; KOPRI(PP10030) ; KOPRI(PP10030)
源URL[http://ir.iggcas.ac.cn/handle/132A11/74816]  
专题中国科学院地质与地球物理研究所
通讯作者Hwang, Jeong
作者单位1.Daejeon Univ, Dept Geol Engn, Taejon 300716, South Korea
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA
4.Korea Polar Res Inst, Inchon 406600, South Korea
5.Kongju Univ, Dept Geol Sci, Konju 314701, South Korea
推荐引用方式
GB/T 7714		 Hwang, Jeong,Zheng Xiangshen,Ripley, Edward M.,et al. Isotope geochemistry of volcanic rocks from the Barton Peninsula, King George Island, Antarctica[J]. JOURNAL OF EARTH SCIENCE,2011,22(1):40-51.
APA Hwang, Jeong,Zheng Xiangshen,Ripley, Edward M.,Lee, Jong-Ik,&Shin, Dongbok.(2011).Isotope geochemistry of volcanic rocks from the Barton Peninsula, King George Island, Antarctica.JOURNAL OF EARTH SCIENCE,22(1),40-51.
MLA Hwang, Jeong,et al."Isotope geochemistry of volcanic rocks from the Barton Peninsula, King George Island, Antarctica".JOURNAL OF EARTH SCIENCE 22.1(2011):40-51.

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来源：地质与地球物理研究所

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