西藏盐井地区盐泉同位素特征示踪研究  

RESEARCH ON CIRCULATION MODE FOR SALT SPRINGS BY ISOTOPE TRACING IN YANJIN,TIBET

作　　者：漆继红[1] 许模[1] 张强[1] 覃礼貌[2] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]西南交通大学土木工程学院,四川成都610000

出　　处：《地球与环境》2008年第3期237-244,共8页Earth and Environment

摘　　要：对西藏盐井地区盐泉、曲孜卡泉、地表水及重要地层进行了同位素测定和分析,结合区域地质构造条件、辅以水化学证据确定泉水的补径排模式。δD~δ18O规律指示出盐泉和温泉的补给类型的差异;用δ18O对泉水的补给区海拔高程进行恢复;泉水、岩样的δ13C~δ18O规律指示出盐泉流经的主要相关层位为上三叠统地层T3b^T3d;其排泄主要受到芒康-盐井复式向斜次级背斜核部的张性裂隙所控制。Based on the analysis results of isotopes and the geological environment, the circulation mode of salt spring water is con- firmed under the Earth. The stable isotopes of ^18O, D and radioactive isotopes of 3H in the spring water can give proof about the type of supply water and blending conditions. Also, the altitude of supply water can be confirmed if the supple water is rain. The relationship between ^13C and ^18O can provide some information about water-rock reactions, and the correlative stra- tum where the spring flows through can be concluded. It is concluded that the salt sprig shows some difference in circulation mode from the hot spring-Quzika, and the supple water of the spring is rain and the Lancangjiang River water, but the depar- ture of ^18O according to the rain is that the Lancangjing River water mixes the salt spring and rock inflection. The main strata of the salt spring flowing through are T3 d--T3 b, and it has taken more than several dozens of years before they can effuse from the rock crannies.

关 键 词：盐泉 碳 氧同位素 补给类型 水岩作用 

分 类 号：P641[天文地球—地质矿产勘探]