江陵凹陷新生代玄武岩水-岩反应模拟及其对富钾卤水成因的指示  

Simulation of Cenozoic Basalt Water-Rock Reaction in Jiangling Depression and Its Indications to Genesis of Potassium-Rich Brine

作　　者：王春连[1] 刘成林[1] 余小灿 王九一 李瑞琴[1,2] 段晓旭 刘思晗 游超 周博文 Wang Chunlian;Liu Chenglin;Yu Xiaocan;Wang Jiuyi;Li Ruiqin;Duan Xiaoxu;Liu Sihan;You Chao;Zhou Bowen(Ministry of Natural Resources Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;School of Earth and Space Sciences,Peking University,Beijing 100871,China;College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,China;Faculty of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Institute of Geological Survey,China University of Geosciences,Wuhan 430074,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]北京大学地球与空间科学学院,北京100871 [3]长江大学地球物理与石油资源学院,湖北武汉430100 [4]昆明理工大学国土资源工程学院,云南昆明650093 [5]中国地质大学地质调查研究院,湖北武汉430074

出　　处：《地球科学》2022年第1期94-109,共16页Earth Science

基　　金：国家自然科学基金项目(Nos.U20A2092,42002106,41502089);国家重点基础研究发展计划(973计划)项目(No.2011CB403007);中央级公益性科研院所基本科研业务费专项资金(Nos.KK2005,K1706,K1415);中国地质调查局地质矿产调查评价专项(Nos.DD20190816,DD20190606)。

摘　　要：关于江陵凹陷富钾卤水的物质来源和成因机理仍未查明.对凹陷新生代玄武岩开展矿物学、岩石学、地球化学研究以及水-岩反应模拟实验,重点研究时间、温度、流体成分等对水-岩反应的影响.结果表明,卤水具有高锂低镁的特征,说明其在成因上受到火山活动的影响;研究区岩浆发生不同程度的分异,玄武岩蚀变作用强烈,表明地下热液的交代作用强烈,玄武岩通过水-岩反应为富钾卤水矿提供了物质来源;温度是流体对元素的淋滤能力的主要控制因素,高盐度流体是各成矿元素主要的迁移载体,水-岩反应是卤水形成的重要过程.The material source and genesis mechanism of the potassium-rich brine in Jiangling Depression have not yet been ascertained.Mineralogical,petrological,geochemical analyses and water-rock reaction simulation experiments on Cenozoic basalts were carried out in Jiangling Depression,focusing on the effects of time,temperature,and fluid composition on the water-rock reaction.The study shows that the brine has the characteristics of high lithium and low magnesium.It shows that the origin of brine was controlled by volcanic activity.The magma in the study area was differentiated to different degrees,and the basalt alteration was strong,indicating that the subsurface hydrothermal fluid had a strong metasomatism on the basalt in the study area.Basalt provided material source for potassium-rich brine ore through water-rock reaction.Temperature is the main controlling factor of the eluvial capacity of the fluid,and the high salinity fluid is the main carrier of the ore-forming elements.Water-rock reaction is an important process of brine formation.

关 键 词：富钾卤水 水-岩反应 江陵凹陷 新生代 含矿卤水成因 玄武岩 矿床学 

分 类 号：P611.5[天文地球—矿床学] P588.1[天文地球—地质学]