东南沿海火山岩地区火山黏土型锂矿的发现  

Discovery of Volcanic Clay-type Lithium Deposit in Region of Volcanic Rocks Along the Southeastern Coast of China

作　　者：邵小阳 邓飞 张忠进 王汝成[3,4] 陆现彩[3,4] 车旭东[3,4] SHAO Xiaoyang;DENG Fei;ZHANG Zhongjin;WANG Rucheng;LU Xiancai;CHE Xudong(Foshan Geological Bureau of Guangdong Province,Foshan 528000,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory for Mineral Deposits Research,School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China;Frontiers Science Center for Critical Earth Material Cycling,Nanjing University,Nanjing 210023,China)

机构地区：[1]广东省佛山地质局,佛山528000 [2]同济大学土木工程学院,上海200092 [3]内生金属矿床成矿机制研究国家重点实验室,南京大学地球科学与工程学院,南京210023 [4]关键地球物质循环教育部前沿科学中心,南京大学,南京210023

出　　处：《高校地质学报》2024年第4期409-417,共9页Geological Journal of China Universities

基　　金：广东省自然资源厅“广东和平地区1:5万区域地质调查”(2022-11);关键地球物质循环前沿科学中心项目(2022300192)联合资助。

摘　　要：广东省东北部石人背盆地上白垩统叶塘组中存在锂元素超常富集现象(Li_(2)O含量可达0.2%以上),具有寻找黏土型锂矿的良好前景。石人背盆地综合剖面测量、全岩地球化学分析及岩相学观察表明,锂的富集层位位于叶塘组中—上部页岩、泥岩和粉砂岩中,黏土矿物是锂的主要载体矿物,其成因与火山活动密切相关,初步判断为火山活动相关的黏土型锂矿。盆地构造为锂矿形成提供了有利的沉积环境,富锂沉积层的厚度可观,连续富矿的层位厚度可达226 m,找矿潜力较大。该矿的发现为中国东南沿海火山岩地区寻找超大型火山岩相关沉积型锂矿提供了重要的找矿线索。We report the lithium enrichment in the late Cretaceous Yetang Formation,located in the Shirenbei Basin,northeast of Guangdong Province.The Li_(2)O content is greater than 0.2%,and can be a target for extracting lithium.Comprehensive crosssections of the Shirenbei Basin,geochemical analyses and lithofacies interpretation suggest that the lithium-enriched layers occur in shale,mudstone and siltstone,located in Middle-Upper Yetang Formation;lithium is mainly stored in clay minerals,whose formation is closely related to volcanic activities.It was initially interpreted as a volcanic-type lithium-rich clay deposit.The basin structure provides the environment for sedimentation and concentration of lithium.The layers containing enriched lithium are approximately 226 meters thick in total,and are in great potential for extracting lithium deposit.This discovery provides fclues on investigating large-scale lithium-rich clay deposits related to volcanic activities along the southeast coast of China.

关 键 词：火山黏土型锂矿 叶塘组 石人背盆地 粤东北地区 

分 类 号：P618.71[天文地球—矿床学]