吉泰盆地卤水型钾锂矿成矿地质特征  

Geological characteristics of the brine type of potassium-lithium deposit in the Jitai basin

作　　者：王焕 王春连[2,3] 余小灿 李强 刘殿鹤 颜开 Wang Huan;Wang Chunlian;Yu Xiaocan;Li Qiang;Liu Dianhe;Yan Kai(China University of Petroleum,Beijing,102249,China;Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing,100037,China;East China university of technology,Nanchang,Jiangxi,330013,China;Institute of Geology,Chinese Academy of Geological Sciences,Beijing,100037,China;Fifth Geological Brigade of Jiangxi Bureau of Geology,Xinyu,Jiangxi,338099,China;School of Earth and Space Sciences,Peking University,Beijing,100871,China)

机构地区：[1]中国石油大学(北京),北京102249 [2]中国地质科学院矿产资源研究所成矿作用与资源评价重点实验室,北京100037 [3]东华理工大学地球科学学院,江西新余330013 [4]中国地质科学院地质研究所,北京100037 [5]江西省地质局第五地质大队,江西新余338099 [6]北京大学地球与空间科学学院,北京100871

出　　处：《化工矿产地质》2023年第4期289-295,共7页Geology of Chemical Minerals

基　　金：国家自然科学基金重点项目江汉盆地古近纪卤水型锂铷铯关键金属矿床成矿作用与找矿预测(编号:U20A2092);中央级公益性科研院所基本科研业务费专项萤石等非金属矿产在战略性新兴产业中的应用及重点研究(编号:KK2005);深地资源成矿作用与矿产预测重点实验室开放基金基于流体包裹体分析的四川盆地早三叠世古海水化学特征及其对钾盐沉积的约束研究(编号:ZS1912)。

摘　　要：中国探明卤水型锂钾资源主要分布于青藏高原、罗布泊盐湖、江汉盆地和川西等地区,这些资源开发成本高、难度大,近期难以满足产业发展需求。目前,在吉泰盆地晚白垩纪地层中找矿取得重大突破,氯化钾含量超过1g/L、氯化锂达到工业品位2倍。本文通过对吉泰盆地周边中生代火成岩开展矿物学、岩石学、地球化学以及流体包裹体研究,探讨火成岩与富钾锂卤水成因之间的关系。研究认为吉泰盆地卤水矿Mg/Li比值低,表明卤水在成因与火山活动有关;盆地周边花岗岩属于强过铝、过碱性的特征,导致岩石中锂的富集,发生水-岩反应,为卤水提供锂元素;玄武岩钾元素稍微富集,有利于卤水钾元素富集。China's proven brine-type of lithium and potassium resources are mainly distributed in the Qinghai-Tibet plateau,Lop Nur Salt Lake,Jianghan basin and western Sichuan,etc.These resources are costly and difficult to develop,and it is difficult to meet the needs of industrial development in the near future.At present,a great breakthrough has been made in the exploration in the late Cretaceous strata of the Jitai basin,Jiangxi with the content of potassium chloride exceeding 1g/L and lithium chloride reaching twice the industrial grade.In this paper,the Mesozoic igneous rocks around the Jitai basin are studied in aspect of mineralogy,petrology,geochemistry and the fluid inclusions to discuss the relationship between the igneous rocks and the origin of potassium-rich lithium brine.The study shows that the Mg/Li ratio of the brine deposits in the Jitai basin is low,which indicates that the origin of the brine is related to volcanic activities.The granite around the basin is characterized by strongly-peraluminum and peralkaline,which leads to the enrichment of lithium in the rocks and the water-rock reaction take place,which provides lithium to the brine.Basalt is slightly enriched in potassium,which is conducive to the enrichment of potassium in brine.

关 键 词：吉泰盆地 白垩系 卤水型钾锂 地质特征 

分 类 号：P619.211[天文地球—矿床学]