阿里扎仓茶卡 -拉果错地区盐湖矿产成矿地质规律及找矿远景探讨

Metallogenic Geology and Prospecting Prediction of Salt Lake Minerals in Chagcam Caka-Lhaguo Tso Area，Ari

中文关键词:  盐湖矿产  地质特征  找矿远景  扎仓茶卡 -拉果错

英文关键词:Salt lake minerals  Metallogenic geology  Prospecting prospect  Chagcam Caka-Lhaguo Tso area  Ari region

中文摘要:

      西藏阿里扎仓茶卡 -拉果错地区盐湖矿产地处班公错 -怒江缝合带西段。南北两侧为羌塘—三江复合板片和冈底斯—念青唐古拉板片。成矿区主要分布于西羌塘高原西部硫酸钠亚型、碳酸盐型盐湖硼、钾、锂、芒硝成矿带( Ⅳ-6)和扎仓茶卡 -洞错硫酸钠亚型锂、硼、钾卤水 -钠、钙、镁、硼酸盐矿集区内。该区属于藏北寒冷的干旱 -半干旱高原季风气候区，年蒸发量 2 065～2 300 mm，为降水量的 7～8倍，是盐湖形成的理想地区。该地区共计有大型盐湖矿产 4处，以碳酸盐型和硫酸盐型盐湖卤水矿为主。通过对区域地质背景并结合典型矿床地质特征、盐湖演化、第四系空间结构变化等内容的分析，认为该区域在古湖盆、现代湖盆周边及湖水底部第四系内有很好的找矿远景。

英文摘要:

      The salt lake mineral resources in Chagcam Caka-Lhaguo Tso area，Tibet Autonomous Region are located in the western section of the Bangongcuo-Nujiang tectonic zone，with Qiangtang-Sanjiang composite plate and Gangdise-Nyenchen Tanglha plate on the north and south sides. The mining area being part of Chag. cam Caka-Dong Tso sodium sulfate subtype lithium，boron，potassium brine-sodium，calcium，magnesium， borate mineral gathering area，in the west of Qiangtang Plateau sodium sulfate subtype，carbonate salt lake boron，potassium，lithium and mirabilite metallogenic belt(IV-6). The climate is cold and drought in thenorthern Tibet Autonomous Region monsoon area. The annual precipitation is less than 50 mm，and the an. nual evaporation is 2 065.7～2 300 mm，7～8 times of the precipitation，thus becoming a good place for salt lakes forming. There are four large salt lake deposits in the area，mainly being carbonate and sulfate brine. Through the analysis of the regional geological background，combined with the typical deposits characteris. tics，the salt lakes evolution and formation，and the spatial structure of salt lakes and Quaternary lacustrine sediments，it is considered that the area has a good salt lake resources prospect concerning to the palaco-lacustrine basin，the periphery of modern lake basin and the Quaternary lake-floor deposits.