| 塔里木盆地古代蒸发岩硫同位素地球化学研究 |
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| 引用本文： | 章振国,高继雷,张向文.塔里木盆地古代蒸发岩硫同位素地球化学研究[J].甘肃地质学报,2010(1):32-37. |
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| 作者姓名： | 章振国 高继雷 张向文 |
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| 作者单位： | 福建省地质调查院;山东省第一地质矿产勘查院;甘肃省地矿局第二地勘院; |
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| 摘 要： | 塔里木盆地是我国一重要成盐盆地,地史时期曾有过长期海侵,被列为我国最有远景的钾盐找矿远景区之一。为判断塔里木盆地主要含盐构造海陆相沉积特征,选择了蒸发岩沉积序列普遍存在的石膏、硬石膏矿物,做了其硫同位素34S/32S比值分析。结果表明,塔里木盆地西部盐岩沉积区石膏矿物硫同位素相对分布于低值段,但均为正值,且比较集中普遍分布于+10‰～+20‰之间。这种石膏硫同位素的较低值分布范围(没有高于+30‰的样品)说明细菌的还原作用较弱,对石膏硫同位素的分馏作用贡献不大。从石膏硫同位素分布特征分析,塔里木盆地成盐环境为开阔氧化条件为主,物质来源不同构造单元各不相同,喀什凹陷以海水为主,库车拗陷及阳霞凹陷则以海水与陆缘水混合为主。
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| 关 键 词： | 塔里木盆地 蒸发岩 硫同位素 |
GEOCHEMISTRY OF SULFUR ISOTOPE OF PALEO-EVAPORITES IN TARIM BASIN |
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| ZHANG Zhen-guo,GAO Ji-lei,ZHANG Xiang-wen.GEOCHEMISTRY OF SULFUR ISOTOPE OF PALEO-EVAPORITES IN TARIM BASIN[J].Acta Geologica Gansu,2010(1):32-37. |
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| Authors: | ZHANG Zhen-guo GAO Ji-lei ZHANG Xiang-wen |
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| Institution: | 1. Geological Survey of Fujian Province;Fuzhou 350001;China;2. The First Geology and Mineral Exploration Institution in Shandong Province;Jinan 250031;3. No.2 Geology and Mineral Exploration Team;Gansu Provincial Bureau of Geology and Mineral Exploration and Development;Lanzhou 730000;China |
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| Abstract: | From the late Cretaceous to the early Tertiary period, the Tethys seawater repeatedly invaded the Shacha subbasin and entered into the Kuche subbasin through the Awati strait. At the same time, as a result of tectonic and paleoenvironmental conditions, many sequences of thick strata of evaporites, especially in its two largest subbasins of Kuche in the north and Shaqa in the southwest have been deposited. Therefore, the western Tarim Basin has been considered to be a favorable location to prospect for ancie... |
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| Keywords: | Tariam Basin evaporites sulfur isotope |
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