高黎贡山南段主要热泉水化学同位素特征研究
Isotopic characteristics of the main hot springs in southern Gaoligong Mountain
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摘要: 提要：笔者应用水化学同位素技术，对高黎山南段主要热泉成因及循环特征进行了研究，取得了一些重要认识。研究区热泉水为低矿化、碱性、Na-HCO3型水；热泉水主要为大气降水起源，循环速率较快，水岩作用不充分，径流环境多处于相对开放的氧化环境之中。以黄草坝泉、三官泉特征比较明显；地下水补给区主要位于泉点附近高程在1800 m的区域范围之内，为附近区域大气降水补给形成；存在浅层、深层两种混合作用形式，黄草坝泉、三官泉现代大气降水混合比在90%以上；热泉热储温度为100～200℃，循环深度在2000～4000 m。Abstract: Abstract：The origins of the main hot springs in southern Gaoligong Mountain and the cyclic characteristics were analyzed by using water chemistry isotope techniques, and some important results were achieved. The hot springs in the area was low-mineralized, alkaline, Na-HCO3 type water,which originated in the rainfall,with characteristics of fast cyclic rate,incomplete water-rock interaction,and flowing in a relatively open oxidation environment. These characteristics are especially outstanding in the Huangcaoba spring and the Sanguan spring. Groundwater recharge areas are mainly located at the elevation of 1800 m and near the spring that is recharged by atmospheric precipitation in the vicinities. There exist two kinds of mixing processes, i.e., shallow and deep mixing processes. Mixing ratio of modern water is above 90% in the Huangcaoba spring and the Sanguan spring. Hot spring thermal reservoir temperature is between 100 and 200℃, and the circular depth is 2000-4000 m.
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Keywords:
- Gaoligong Mountain /
- hot spring /
- water chemistry /
- isotope
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