矿床地质2026，Vol.45Issue(3)：503-528,26.DOI:10.16111/j.0258-7106.2026.03.003
赣南淘锡坝锡锂矿床成矿作用研究:来自矿物地球化学和流体包裹体的证据
Study on metallogenesis of Taoxiba tin-lithium deposit in southern Jiangxi:Evi-dence from mineral geochemistry and fluid inclusions
摘要
Abstract
The Taoxiba deposit is located at the junction of the Wuyishan metallogenic belts and Nanling metallogenic belts in South China,and is a large-scale tin deposit iscovered within the Xikengjing ore field.Recent studies have revealed that biotite in the greisen of its contact zone contains relatively high Li concentrations,indicating potential exploitation value for lithium.To systematically clarify the ore-forming fluid characteristics,fluid evolu-tion processes,and Sn-Li metallogenic conditions of the deposit,this study conducts a comprehensive investiga-tion on alteration minerals and ore-forming fluids using electron probe microanalysis(EPMA),LA-ICP-MS trace element analysis,microthermometry of fluid inclusions,and X-ray diffraction(XRD).The results show that mica in the greisen of the study area is characterized by Si enrichment and depletion in Mg and Ti,belonging to protoli-thionite and acting as the dominant Li-bearing mineral,with an average Li2O content of 1.51％.Chlorite is identi-fied as chamosite,exhibiting geochemical features of Fe enrichment and depletion in Mg and Al.Fluorite inter-grown with cassiterite is enriched in Sn,As and Fe,and depleted in Bi,Sb and Ba.Fluid inclusion microthermom-etry yields homogenization temperatures of 151～326℃ and salinities(w(NaCleq))of 1.74％to 13.07％,indicating that the ore-forming fluid belongs to medium-high temperature and low salinity type.Fluid cooling is the domi-nant mechanism triggering tin mineral precipitation.XRD results demonstrate that silicification,greisenization,topazization and fluoritization are closely associated with Sn-Li mineralization.In the Taoxiba deposit,tin and lithium underwent coupled enrichment and mineralization during the high-temperature and relatively oxidizing stage.With the decrease of temperature and oxygen fugacity,tin continued to precipitate and form ore deposits,whereas lithium mineralization was poorly developed,leading to the decoupling of Sn and Li.关键词
蚀变矿物/流体包裹体/成矿作用/淘锡坝矿床Key words
altered minerals/fluid inclusions/metallogenesis/Taoxiba deposit分类
天文与地球科学引用本文复制引用
郭志强,秦锦华,王登红,刘善宝,赵正..赣南淘锡坝锡锂矿床成矿作用研究:来自矿物地球化学和流体包裹体的证据[J].矿床地质,2026,45(3):503-528,26.基金项目
本文得到国家自然科学基金青年科学基金项目(C类)(编号:DD42402108)和中国地质调查项目(编号:DD202602110203)联合资助 （C类）
