文献类型：期刊文献

英文题名：Skarn-related sphalerite: Indium enrichment and key controlling factors

作者：Wang, Junyi Sun, Guotao Zhou, Jia-Xi Chen, Hui Yu, Bing Luo, Kai Liu, Shiyu Wang, Ruiliang

第一作者：Wang, Junyi

通信作者：Sun, GT[1];Zhou, JX[2]

机构：[1]Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550025, Peoples R China;[2]Minist Educ, Key Lab Karst Georesources & Environm, Guiyang 550025, Peoples R China;[3]Yunnan Univ, Sch Earth Sci, Kunming 650500, Peoples R China;[4]China Geol Survey, Dev & Res Ctr, Beijing 100037, Peoples R China;[5]Minist Nat Resources, Mineral Explorat Tech Guidance Ctr, Beijing 100037, Peoples R China;[6]Guizhou Inst Technol, Sch Resources & Environm Engn, Guiyang 550003, Peoples R China;[7]China Aero Geophys Survey & Remote Sensing Ctr Nat, Beijing 100083, Peoples R China

第一机构：Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550025, Peoples R China;corresponding author), Yunnan Univ, Sch Earth Sci, Kunming 650500, Peoples R China.

年份：2026

卷号：297

外文期刊名：JOURNAL OF ASIAN EARTH SCIENCES

收录：;Scopus(收录号：2-s2.0-105024004348);WOS:【SCI-EXPANDED(收录号:WOS:001636426600001)】；

基金：This study was financially supported by the National Natural Science Foundation of China (Nos. 42202086, 42263010, 42302111, and U2444206) , Geological Surveying Project of China Geological Survey (Nos. DD20230355 and DD20230356) , and Guizhou Provincial Science and Technology Projects (Qiankehejichu-ZK [2023] Yiban064) .

语种：英文

外文关键词：Indium; Sphalerite; Controlling factors; Skarn deposits; Associated intrusions

摘要：Indium is a critical metal that can be concentrated in skarn deposits. However, not all skarn deposits exhibit indium mineralization. The controlling factors of indium mineralization in skarn deposits are unclear. We investigate the sphalerite trace element, geological setting, geochemical compositions of related intrusions, and hydrothermal physicochemical conditions of 47 skarn deposits worldwide to unravel the critical factors for indium mineralization. The deposits are classified into four types according to the indium content in sphalerite. The In-rich skarn deposits are predominantly distributed in the intra-continental extension setting. The In-rich skarn deposits show higher SiO2 values and Rb/delta Eu ratios, and lower MgO contents than the In-poor deposits, indicating that the evolution process evaluates the indium enrichment in magma. The Sr-Nd-Hf isotopes suggest that In-rich skarns are almost or partly derived from the partial melting of metasedimentary rocks; however, Inpoor deposits are dominantly derived from the melting of the mafic lower crust. The similar hydrothermal temperatures (200 to 300 degrees C), salinities (4 to 12 NaCl wt%), and delta 34S (-5 to 10 parts per thousand) between In-rich and In-poor deposits imply that the indium contents in sphalerite may be irrelevant to these conditions. The In and Cu contents define a solubility limit (CIn=CCu), indicating that the Cu activity controls the maximum indium contents in sphalerite. The study highlights that the skarn-related indium mineralization is a coupled consequence of the magma sources, evolution, and hydrothermal Cu activity.