新疆库车盆地钾盐科探1井含盐系地球化学特征及找钾指示  

Geochemical characteristics and ore-prospecting indicators of salt-bearing series in No.1 exploratory drill hole of Kuqa Basin,Xinjiang

作　　者：吴坤[1] 刘成林[2] 焦鹏程[2] 曹养同[2] 张华[2] 高超[3] 赵宪福[2] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国地质科学院矿产资源研究所,北京100037 [3]北京市地质工程设计研究院,北京101500

出　　处：《矿床地质》2014年第5期1011-1019,共9页Mineral Deposits

基　　金：国家"973"计划(编号:2011CB403007);中央地质勘查基金项目(编号:2009650004);"十二五"国家科技支撑计划305项目(编号:2011BAB06B00)的联合资助

摘　　要：在盐湖沉积演化过程中,钾盐矿物在盐类沉积的中晚期阶段才开始析出。因此,研究含盐系盐类的沉积地球化学特征,不仅可以从侧面获取岩盐的沉积物源和成盐古卤水蒸发浓缩程度等地球化学信息,而且更能揭示古盐湖钾盐富集趋势。文章通过对库车盆地钾盐科探1井钻取的岩芯样品进行高精度采样测试,得出岩盐中Mg×103/Cl、K×103/Cl、Li×103/Cl与K+、Mg2+、Li+、Ca2+、Cl-含量的垂向变化规律。并与库车盆地其他钻孔中的岩盐含钾性进行对比,同时,依据钻井剖面岩性特征,与潜江凹陷和大汶口凹陷含盐系剖面进行对比,论述研究区成盐的地球化学特征,对其钾盐成矿前景进行分析和评价。In the deposition process of the saline lake, potassium began to precipitate at the middle or late stage of salt deposition. Therefore, the study of sedimentary geochemical characteristics of the salt minerals can not only obtain the information on the source of sediments and the concentration extent of brine but also reveal the geochemical characteristics of hidden deposits, especially the condition of potassium content. In this paper, by using the methods of geochemical analysis and adopting the Kuqa Basin as the study object, the authors analyzed core samples collected from No. 1 potassium exploratory drill hole and obtained vertical variation regularity of such coefficients of rock salt as Mg × 10^3/Cl, K × 10^3/Cl and Li × 10^3/Cl as well as ion concentrations of K＋ , Mg2＋ , Li＋ , Cl- and Ca2 ＋. In comparison with potassium content of halite in other drill holes in the Kuqa Basin and through a comparative study of salt sections in the Qianjiang depression and Dawenkou depression according to the lithological characteristics of well sections, the authors discussed the geochemical characteristics of salt deposition in the study area and evaluated the potash exploration prospect of the Kuqa Basin.

关 键 词：地球化学 库车盆地 科探1井 地球化学特征 成钾前景 

分 类 号：P611.4[天文地球—矿床学] P619.211[天文地球—地质学]