南漳县西部梁山组富锂黏土岩物源区特征  

Source Area Characteristics of Lithium Rich Clay Rocks in the Liangshan Formation of Western Nanzhang County

作　　者：闫博 刘平 王帅君 YAN Bo;LIU Ping;WANG Shuajun(Eighth Geological Brigade of Hubei Geological Bureau;Resources and Environment Research Center of Hanjiang River Basin,Xiangyang 441002,China)

机构地区：[1]湖北省地质局第八地质大队 [2]汉江流域资源环境研究中心,湖北襄阳441002

出　　处：《中国资源综合利用》2024年第3期74-76,共3页China Resources Comprehensive Utilization

基　　金：湖北省地质勘查基金项目“湖北省襄阳地区锂多金属矿产调查评价项目”([2023]1)。

摘　　要：随着光伏产业和新能源汽车产业的蓬勃发展,国内外锂资源需求持续增加,黏土型锂矿逐渐成为矿产勘查的重点。经地质调查,南漳县西部梁山组黏土岩存在锂的超常富集现象,具备形成独立锂矿床的潜力,而梁山组富锂黏土岩物源特征、沉积环境和成矿规律的研究仍为空白。因此,有必要研究南漳县西部梁山组富锂黏土岩物源特征,以进一步揭示其源区地质特征,为后续找矿工作提供有效指导。经测定,南漳县西部梁山组富锂黏土岩样品Al_(2)O_(3)/TiO_(2)比值为14.45~37.69,平均值为27.68;K_(2)O/Al_(2)O_(3)比值为0.0017~0.0206,平均值为0.0098;Cr/Zr比值为0.1449~0.3519,平均值为0.2775。结果表明,黏土岩物源区主要为长英质岩石。La/Sc-Th/Co图解、Zr-TiO_(2)图解中,所有样品点均落在长英质物源区,显示物源的单一性。大多数样品的化学蚀变指数(Chemical Index of Alteration,CIA)、化学风化指数(Chemical Index of Weathering,CIW)均在90以上,说明源岩经历强烈化学风化作用。With the vigorous development of the photovoltaic industry and the new energy vehicle industry,the demand for lithium resources at home and abroad continues to increase,and clay type lithium mines have gradually become the focus of mineral exploration.According to geological surveys,there is an abnormal enrichment of lithium in the clay rocks of the Liangshan Formation in the western Nanzhang county,which has the potential to form independent lithium deposits,however,research on the source characteristics,sedimentary environment,and mineralization laws of the lithium rich clay rocks of the Liangshan Formation is still blank.Therefore,it is necessary to study the source characteristics of lithium rich clay rocks in the Liangshan Formation in the western Nanzhang county,in order to further reveal the geological characteristics of its source area and provide effective guidance for subsequent mineral exploration work.According to measurements,the Al_(2)O_(3)/TiO_(2)ratio of the lithium rich clay rock samples from the Liangshan Formation in the western Nanzhang county ranges from 14.45 to 37.69,with an average value of 27.68;the K_(2)O/Al_(2)O_(3)ratio ranges from 0.0017 to 0.0206,with an average value of 0.0098;the Cr/Zr ratio ranges from 0.1449 to 0.3519,with an average value of 0.2775.The results indicate that the clay source area is mainly composed of felsic rocks.In the La/Sc-Th/Co diagram and Zr-TiO_(2)diagram,all sample points are located in the source region of feldspar,indicating the singularity of the source.The Chemical Index of Alteration(CIA)and Chemical Index of Weathering(CIW)of most samples are above 90,indicating that the source rock has undergone strong chemical weathering.

关 键 词：梁山组 富锂黏土岩 物源 化学蚀变指数(CIA) 化学风化指数(CIW) 南漳县 

分 类 号：P618.71[天文地球—矿床学]