文献类型：期刊文献

英文题名：Gallium isotope variation in the Anning carbonate-hosted clay-type lithium deposit, Central Yunnan Province, China: Implications for the Li enrichment mechanism

作者：Zhang, Yuxu Wen, Hanjie Qiao, Pan Zhu, Chuanwei Fan, Haifeng Du, Shengjiang

第一作者：Zhang, Yuxu

通信作者：Wen, HJ[1]

机构：[1]Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang 550081, Peoples R China;[2]Changan Univ, Sch Earth Sci & Resources, 126 Yanta Rd, Xian 710054, Shaanxi, Peoples R China;[3]Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China;[4]Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China;[5]Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Peoples R China;[6]Chinese Acad Sci, Inst Geochem, 99 West Lincheng Rd, Guiyang 550081, Guizhou, Peoples R China

第一机构：Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang 550081, Peoples R China

通信机构：corresponding author), Changan Univ, Sch Earth Sci & Resources, 126 Yanta Rd, Xian 710054, Shaanxi, Peoples R China.

年份：2025

卷号：274

外文期刊名：JOURNAL OF GEOCHEMICAL EXPLORATION

收录：;EI(收录号：20251318120672);Scopus(收录号：2-s2.0-105000812379);WOS:【SCI-EXPANDED(收录号:WOS:001456801600001)】；

基金：This research was financially supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDA0430103), the National Natural Science Foundation of China (Grant Nos. 42273016 and 92162214), the Key R & D Program of Yunnan Province (202103AQ100003), and the Start-up Fund for High-level Talents of Guizhou Institute of Technology (2023GCC048).

语种：英文

外文关键词：Ga isotopes; Li deposits; Clay-type deposits; Mineral transformation

摘要：Lithium deposits are mainly divided into three types: pegmatite-type, brine-type, and clay-type. Compared with traditional pegmatite-type and brine-type lithium deposits, clay-type lithium deposits have attracted increasing attention due to their large scale and stable distribution. We investigated the Ga isotope composition of three drill cores (ZK401, ZK406, and ZK408) in the Anning carbonate-hosted clay-type lithium deposit in central Yunnan Province, China. The delta 71GaNIST994 values and Ga contents of the claystone sample from drill core ZK401 are 0.97-1.33 %o and 1840-4070 ppm, respectively, with a negative correlation between the Ga content and delta 71GaNIST994 value. For drill core ZK406, the delta 71GaNIST994 values and Ga contents of the claystone sample are 1.26-1.48 %o and 29.8-5950 ppm, respectively, with a positive correlation between the Ga content and delta 71GaNIST994 values. For drill core ZK408, the delta 71GaNIST994 values and Ga contents of the claystone sample are 1.04-1.22 %o and 2.70-4990 ppm, respectively, with no significant correlation observed. Previous studies have suggested that smectite is the precursor of Li-bearing minerals. However, the X-ray diffraction analysis showed that the clay minerals in the three drill cores were primarily illite, clinochlore, kaolinite, and diaspore/boehmite, indicating that these clay minerals underwent mutual transformation during the diagenesis process. The Ga isotope data suggested that during the mineral conversion process, solid-state transformation was the dominant reaction mechanism of the strata in drill core ZK401, while dissolution-crystallization was the dominant reaction mechanism of the strata in drill core ZK406. The cancellation of both mechanisms' effects may explain the lack of a clear correlation between the Ga contents and delta 71GaNIST994 values in drill core ZK408. Lithium is more likely to be preserved via the solid-state transformation mechanism during the conversion of the parent mineral (such as smectite) into daughter minerals (such as illite and clinochlore), while the dissolution-crystallization mechanism is more likely to lead to the redistribution of Li.