Distribution of Hydrogen and Oxygen Isotopes in Salt Lakes of the Qinghai—Xizang Plateau,China

The Qinghai-Xizang Plateau is an area where a large number of salt lakes are distributed. We have collected several hundred samples of natural waters over the Plateau since 1976 and carried out researches on their hydrogen and oxygen isotopes. The results indicate that the^δD and δ¹⁸O values of the salt lake waters over the Plateau range from −64.1 to +12.4‰ and from −11.19 to +8.62‰, respectively. From the different types of surfaces, ground and lake waters of various salinities it is inferred that the compositions of H and O isotopes in the initial water of Qinghai Lake are^δD=−55.0‰ and {ie336-1}; and those in the original water from the lakes in northern Xizang, are^δD=−116.0‰ and {ie336-2}. Brines in the salt lakes are derived from rain water through prolonged circulation. Oilfield water also makes some contribution to the salt lakes in the Qaidam Basin. Similar slopes of evaporation lines of water isotopes are noticed for the Qinghai Lake area and northern Xizang. This is attributed to the evolution of the isotopes in these water bodies in an environment of middle latitude and high elevation.     

地球表层辐射平衡质疑

太阳辐射是推动地球表层系统向前发展的根本动力。为了揭示地表太阳辐射输入、转化、贮存和输出的客观规律,自然科学工作者进行了长期的不懈探索,创立了地表辐射平衡学说,它是气象学、自然地理学、以及地球表层学的基本理论之一。     

石油成因新概念新理论

有机地球化学学科在我国由引进至发展已有廿多年历史。实践证明这一新兴的地球化学学科对于发展我国陆相生油理论、促进我国油气资源的勘探开发已发挥出重要作用。我国有机地球化学工作者在开展国家五十四项油气重大攻关课题的研究中揭示了许多石油成因新概念、新理论,如未成熟原油和低成熟原油的不断发现,煤成油的研究等,不但为扩大我国油气资源的勘探远景评价作出了贡献,同时进一步丰富着我国陆相石油成因新理论,如浅层生油层有机质生油、干酪根热解聚生油,生物聚合物直接成油,非烃、沥青质成油等值得进一步深入研     

中国大陆Ms≥8.0级大震活动特征的初步探讨

本文从宏观上研究了中国大陆Ms≥8.0级大震的空间分布特征及其相关因素,并据此提出了未来大震活动的危险地带和发震时段。     

一种测求水井含水层导水系数的新方法

本文给出了一种测求水井含水层导水系数的新方法。利用Cooper理论和振动理论,通过简单的试验,可以测求出水井含水层的导水系数。用这种方法计算出珍珠泉井含水层的导水系数为2439m~2/d,用抽水试验法测得该系数为2618m~2/d,两者符合得较好。