罗布泊盐湖区深部钾盐找矿:理论、勘查、进展及前景分析  

Deep potash deposits in the Lop Nur salt lake:theory,practice,exploration advances and prospecting

作　　者：张华[1] 刘成林[1] 焦鹏程[1] 颜辉 张凡凯 李文学 于咏梅 马宝成 王江 王露莎 胡宇飞[1] 沈立建[1] 姚佛军[1] 郭城 上官栓通 苏野[3] 张云 ZHANG Hua;LIU Chenglin;JIAO Pengcheng;YAN Hui;ZHANG Fankai;LI Wenxue;YU Yongmei;MA Baocheng;WANG Jiang;WANG Lusha;HU Yufei;SHEN Lijian;YAO Fojun;GUO Cheng;SHANGGUAN Shuantong;SU Ye;ZHANG Yun(Ministry of Natural Resources Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;State Development and Investment Corporation,Xinjiang Luobupo Potash Co.,LTD.,Second,Xinjiang 839000 China;Geological Team of Hebei Coalfield Geological Bureau,Xirigtai Hebei 054001,China)

机构地区：[1]中国地质科学院矿产资源研究所,自然资源部成矿作用与资源评价重点实验室,北京100037 [2]国投新疆罗布泊钾盐有限责任公司,新疆哈密839000 [3]河北煤田地质局第二地质队,河北邢台054001

出　　处：《地质学报》2021年第7期2030-2040,共11页Acta Geologica Sinica

基　　金：国家自然科学基金(编号41972092,40830420,41702097);国投新疆罗布泊钾盐有限责任公司科技项目联合资助成果。

摘　　要：本文对近年来罗布泊深部钾盐成矿规律研究及找矿进展进行了梳理总结。将其大致归纳为"上升卤水补给"及"含水墙"等成钾理论/模式,为罗布泊后备钾资源找矿提供了新的方向和思路,预测了有利成钾靶区。建立以遥感地质解译、高精度重力剖面测量、EH4连续电导率成像以及氡气剖面测量为主的勘查技术体系,实现了盐湖区深部钾盐找矿靶区高效、经济圈定以及钻孔定位。实施深部钾盐科学钻探验证工程,揭示罗布泊深部赋存有丰富、可采的卤水钾盐资源,取得了找矿突破。罗布泊深部钾盐找矿是理论指导找矿取得突破的又一案例,其成矿理论和勘查技术体系可为其他盐湖及古代盐盆地深部卤水钾盐找矿提供借鉴和参考。鉴于罗布泊卤水钾盐的高强度开发态势以及深部找矿的良好前景,有必要进一步加强深部富钾卤水成因机理研究,重点摸清200~500 m层段资源、研发相应开采技术,为罗布泊钾盐基地可持续发展提供后备资源和技术储备。This study examines and summaries research advances in metallogenetic regularity and exploration practice of deep potash deposits in the Lop Nur salt lake in past decades.Models of‘supply of ascending brine’and‘brine-bearing wall’provide a new perspective and predict potential favorable areas for deep potash exploration.The newlybuilt technological system mainly including remote sensing,high-revolution gravity measurement,EH4 electromagnetic imaging and radon measurement achieve target delineation in an efficient and economical way.The drilling revealed abundant potash resources andprovided an important prospecting breakthrough for the exploration of deep potash in the Lop Nur salt lake.The above progress serves as a classic example for exploration practices guided by theory,and demonstrates that combiningtheoretical model and exploration technology can provide a reference for deep potash exploration for other salt lakes and ancient salt basinsin China.Considering the recent exploitation of the shallow brine potash resource and the potential for deep potash exploration,further theoretical research on potassium-rich brine in the deep Lop Nursalt lake,investigation on resource and development of the related mining technology is recommended for providing reserve resource guarantee and technical support.

关 键 词：深部地层 成钾机理 富钾卤水 盐湖 罗布泊 

分 类 号：P619.211[天文地球—矿床学]