柴达木盆地中西部碱石山背斜深层卤水赋存特征研究  

Study on Jianshishan Anticline Deep Brine Hosting Features in Midwestern Qaidam Basin

作　　者：何邦超 He Bangchao(Yangtze River Geological Prospecting Institute,Nanjing,Jiangsu 210046)

机构地区：[1]江苏长江地质勘查院,南京210046

出　　处：《中国煤炭地质》2022年第7期22-27,共6页Coal Geology of China

基　　金：青海省茫崖行委碱石山钾盐矿预查项目(CJKC-KCBB-DK-201901-0001)。

摘　　要：柴达木盆地自中生代末—新生代初以来,沉积了丰富的盐类矿产资源,尤其在中西部一些背斜构造发育地区的深层卤水储量丰富、品位高,具有良好的开发和利用前景。以柴达木盆地中西部的碱石山背斜为研究对象,在充分分析区域和研究区地质条件、构造发育、沉积环境演化、物质来源、水文地质条件的基础上,对碱石山背斜深层卤水的矿床赋存规律进行了深入的分析。研究表明,碱石山背斜构造区卤水型钾盐矿属沉积型地下卤水钾矿,成盐物质来源大致有三个方面:残留湖水、周边山区岩石风化淋滤、深部卤水沿构造裂隙上升至地表;碱石山背斜轴部,应力相对集中,裂隙相对发育,卤水储层空间相对较大,断层破碎带一方面作为卤水存储空间,另一方面对上下含卤水地层形成导通作用。Since the end of Mesozoic to the beginning of Cenozoic,in the Qaidam Basin has deposited abundant halogenic mineral resources.Especially deep brine in the midwestern part some anticline structure developed areas has resources abundant,grade high features with good exploitation and utilization prospects.The study has taken the Jianshishan anticline in midwestern Qaidam Basin as the subject investigated,based on regional and study area geological conditions,structural development,sedimentary environment evolution,material provenance and hydrogeological condition have thoroughly analyzed brine deposit hosting regularity.The study has shown that material provenance of underground halogenic potash deposit in the area is roughly from three aspects:residual lacustrine water,peripheral mountainous area rock weathering leacheate and deep brine risen along tectonic fissures to surface.In Jianshishan anticline axis,stress is relatively concentrated,fissures relatively developed,brine reservoir space relatively larger;shattered fault zone as brine storage space on the one hand,and as intermediate between upper and lower brine-bearing strata on the other hand.

关 键 词：深层卤水 盐类矿产 赋存特征 地质调查工程 柴达木盆地 

分 类 号：P614.3[天文地球—矿床学]