古地理学报 ›› 2025, Vol. 27 ›› Issue (2): 383-394. doi: 10.7605/gdlxb.2025.051

• 沉积矿产资源专题 • 上一篇    下一篇

黔中石炭系九架炉组含铝岩系中锂分布规律*

蔡路1,2(), 陈华2, 杨瑞东1(), 董艳杰2, 梁鹏2, 周东东2, 高爽2, 杨明坤2   

  1. 1 贵州大学资源与环境工程学院,贵州贵阳 550025
    2 贵州省地质矿产勘查开发局一一五地质大队,贵州贵阳 551400
  • 收稿日期:2024-08-12 修回日期:2024-12-17 出版日期:2025-04-01 发布日期:2025-04-01
  • 作者简介:
    蔡路,男,1989年生,博士研究生,高级工程师,主要从事固体矿产勘查及相关科研工作。E-mail:
  • 基金资助:
    *贵州省找矿突破战略行动重大协同创新项目(黔科合战略找矿[2022]ZD002、[2022]ZD003)、贵州省战略性关键金属超常富集成矿动力学重大研究计划(地勘2024-2)和国家自然科学基金(编号: U23A2027)联合资助

Distribution pattern of lithium in aluminum-bearing rock series of the Carboniferous Jiujialu Formation in central Guizhou Province, China

CAI Lu1,2(), CHEN Hua2, YANG Ruidong1(), DONG Yanjie2, LIANG Peng2, ZHOU Dongdong2, GAO Shuang2, YANG Mingkun2   

  1. 1 College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China
    2 115th Geological Brigade,Bureau of Geology and Mineral Exploration and Development,Guizhou Province Guiyang 551400,China
  • Received:2024-08-12 Revised:2024-12-17 Online:2025-04-01 Published:2025-04-01
  • About author:
    CAI Lu,born in 1989,is a Ph.D. candidate and senior engineer. He is mainly engaged in solid mineral exploration and related scientific research work. E-mail: .
  • Supported by:
    Co-funded by the Major Collaborative Innovation Projects of Guizhou Province's Breakthrough Strategy for Mineral Exploration(Qiankehe Strategic Mineral Exploration[2022]ZD002,[2022]ZD003),the Guizhou Province Strategic Key Metal Ultra rich Integrated Mineral Dynamics Major Research Plan(Geological Exploration 2024-2)and National Natural Science Foundation of China(No. U23A2027)

摘要:

黔中清镇—修文地区铝土矿资源丰富,累计查明铝土矿资源量4.28×108t,初步估算石炭系九架炉组(C1jj)含矿岩系中Li2O的远景资源量16.84×104t,具有潜在综合利用前景。利用黔中地区130条含铝岩系岩石地球化学剖面数据,研究九架炉组中锂的分布规律。结果显示,随着九架炉组寒武系基底地层由老变新,Li2O含量逐渐增大,基底为高台—石冷水组时,九架炉组中Li2O含量相对较高,且分布连续稳定。Li2O含量按岩性: 铝质黏土岩>铝土岩>黏土岩>铝土矿>铁质黏土岩、赤铁矿,按矿石自然类型: 致密状铝土矿>碎屑状铝土矿≫土状—半土状铝土矿。在铝土矿顶底处,由致密状铝土矿向铝质黏土岩、铝土岩转变的岩性过渡带中,Li2O易富集(≥2000μg/g),形成“Li2O异常富集层(铝质黏土岩、铝土岩)—铝土矿—Li2O异常富集层(铝质黏土岩、铝土岩)—铝土矿”的垂向分布特征。九架炉组中Li2O含量受基底地层Li2O背景值、母岩的风化程度、岩性和矿石类型等因素控制。基底Li2O背景值越高,含铝岩系中Li2O的含量相对越高。随着母岩风化程度的加深,Li2O经历先增加后减少的过程,在30%Al2O355%25%SiO245%0.75Al/Si2.2的区间,Li2O值明显富集。同时,优选出长冲河矿区、坛罐窑矿区2个矿区,Li2O含量较高(≥2000μg/g),且横向分布相对连续稳定,有较好的综合利用前景。

关键词: 黔中, 寒武系, 九架炉组, 含铝岩系, 锂, 地球化学, 分布规律

Abstract:

The Qingzhen-Xiuwen area in central Guizhou Province is rich in bauxite resources,with a total identified bauxite resource of 4.28×108 t. The preliminary estimate is that the prospective resource of Li2O in the ore-bearing rock series of the Carboniferous Jiujialu Formation(C1jj)is 16.84×104t,which has potential for comprehensive utilization. This study utilized geochemical profile data from 130 aluminum-bearing rock formations in the Guiyang area to investigate the distribution pattern of lithium in the Jiujialu Formation. The results showed that as the Cambrian basement strata of the Jiujialu Formation changed from old to new,the Li2O content gradually increased. When the basement was the Gaotai Shilengshui Formation,the Li2O value in the Jiujialu Formation was relatively high and the distribution was continuous and stable. Li2O content is determined by lithology: aluminum clay rock>bauxite rock>clay rock>bauxite>iron clay rock,hematite. According to the natural type of ore: dense bauxite>detrital bauxite>>soil semi soil bauxite. At the top and bottom of bauxite,in the lithological transition zone from dense bauxite to aluminum clay rock and bauxite rock,Li2O is easily enriched(≥2000μg/g),forming a vertical distribution characteristic of “Li2O abnormal enrichment layer(aluminum clay rock,bauxite rock)-bauxite-Li2O abnormal enrichment layer(aluminum clay rock,bauxite rock)-bauxite”. The Li2O content in the Jiujialu Formation is controlled by factors such as the Li2O background value of the basement strata,the degree of weathering of the parent rock,lithology,and ore type. The higher the background value of Li2O in the base,the relatively higher the content of Li2O in the bauxite series. As the weathering degree of the parent rock deepens,Li2O undergoes a process of first increasing and then decreasing. In the range of 30%≤Al2O3≤55%,25%≤SiO2≤45%,and 0.75≤Al/Si≤2.2,Li2O values are significantly enriched. At the same time,two mining areas,Changchonghe Mining Area and Tanganyao Mining Area,were selected with high Li2O content(≥2000μg/g)and relatively continuous and stable horizontal distribution,indicating good prospects for comprehensive utilization.

Key words: central Guizhou Province, Cambrian, Jiujialu Formation, aluminum-bearing rock series, lithium, geochemistry, distribution pattern