青藏高原典型盐湖硼矿床成矿条件对比与矿床模式研究

摘要

The geological setting,climate conditions,regional hydrogeochemistry,isotope geochemistry and boron geochemical characteristics of typical borate deposit in Zhacang Chaka and Da Qaidam salt lake on Qinghai-Tibetan Plateau were presented.The results show that borate deposit of Zhacang Chaka and Da Qaidam salt lake controlled by its own inherent geochemical characteristics and external conditions,especially tectonic movement,arid climate since Quaternary period and abundant provenances,the formation of salt lake-type borate deposits on Qinghai-Tibetan Plateau are the results of coupled inherent and external conditions.Based on the study of minerogenetic conditions and pattern of borate deposits in Zhacang Chaka and Da Qaidam salt lake,we establish a minerogenetic pattern of borate deposits on Qinghai-Tibetan Plateau as a high mountain-deep basin-shallow water pattern.%选取青藏高原扎仓茶卡和大柴旦典型盐湖硼酸盐矿床,分别从区域地质背景、气候条件、区域水文地球化学、同位素地球化学以及硼地球化学特征等方面开展研究.结果表明,扎仓茶卡和大柴旦盐湖固体硼酸盐矿床的形成受控于硼自身内在地球化学特性以及外在控制条件,特别是构造运动、第四纪以来的干旱气候条件以及丰富的物源等控制因素,青藏高原盐湖硼酸盐矿床的形成是内外条件耦合的结果.基于扎仓茶卡和大柴旦盐湖硼酸盐矿床的成矿条件和成矿模式的研究,确立青藏高原高寒干旱盐湖区盐湖硼酸盐矿床成矿模式为高山—深盆—浅水成矿模式.