| 察尔汗盐湖物质来源的研究 |
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| 引用本文： | 段振豪
,袁见齐.察尔汗盐湖物质来源的研究[J].现代地质,1988,2(4):420. |
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| 作者姓名： | 段振豪 袁见齐 |
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| 摘 要： | 柴达木盆地察尔汗盐湖是一个以氯化物为主的盐湖,然而今天补给该盐湖的水是碳酸盐和硫酸盐型的。所以,该盐湖的物质来源问题是研究其成因的根本问题,也一直是中外学者感兴趣。同时又感到非常棘手的问题,他们提出了各种假说。本文综合了六化学、岩相古地理、Sr和Br的地球化学、古生态、同位素和构造方面的资料,对前人提出的各种假说逐一进行了论证,最后的结论是,察尔汗盐湖的盐类物质有三个来原:通过河流补给的地表化学风化淋滤物质、通过断层补给的油田水和柴达木古湖的遗留物质。否定了海水来源和第三纪含盐系风化淋滤来源的假说。 中更新世末,察尔汗湖从柴达木古湖中完全蚀立出来,并继承了部分从古湖遗留下来的盐类物质。在察尔汗湖蚀立过程中和独立后早期,构造运动比较强烈,通过断层补给的油田水较多,后来随着构造运动的减弱,油田水补给量逐渐减少,而地丧化学风化淋滤物质的补给一直是比较稳定的。
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| 关 键 词： | 察尔汗盐湖 盐类物质 水化学 油田水 柴达木古湖 |
THE ORIGIN OF SALINE MATERIALS OF QARHAN SALT LAKE IN QAIDAM BASIN, CHINA |
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| Duan Zhenhao Yuan Jianqi.THE ORIGIN OF SALINE MATERIALS OF QARHAN SALT LAKE IN QAIDAM BASIN, CHINA[J].Geoscience——Journal of Graduate School,China University of Geosciences,1988,2(4):420. |
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| Authors: | Duan Zhenhao Yuan Jianqi |
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| Institution: | China University of Geosciences |
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| Abstract: | Chloride accounts for most saline material in Qarhan Salt Lake (QSL) of Qaidam Basin. Carbonate and sulphate type water, however, is now being supplied QSL with. Then arises the problem "where was the saline material from" as a sensitive and radical one, attracting many scientists from home and abroad. Through the effort of the former scientists, five different hypotheses on the origin of the saline materials were proposed. Based on the synthetical study of hydrochemistry of all the waters related to QSL, paleogeography of Qaidam Basin, the geochemistry of element Br and Sr, Paleoecology, isotope geology of MC and tectonics, this paper makes approaches to each hypothesis one by one, and comes to the conclusions that the weathered chemical components from surrounding mountains (by river), oil-ield water (by faults) and salts left over by Ancient Qaidam Lake are the main sources of QSL, and that there could not be any material directly from seawater and from filtered Tertiary salt bearing strata of west Qaidam.
Qarhan Salt Lake isolated itself from Ancient Qaidam Lake at the end of Middle Pleistocene, inheriting a fraction of saline materials from QAL. In early stage after isolating from QAL, violent tectonical movement led up to the supplying QSL with a lot of oil-field waters through faults, with the development of time, oil-field water decreased gradually owning to the tectonical movement. But the supply of the weathered chemical material from surrounding mountains is relatively stable since isolating. |
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| Keywords: | : Qarhan Salt Lake saline material hydrochemistry oil-fieldwater Ancient Qaidam Lake |
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