| 大别地区梨木岭钼矿床成矿流体运移方向与成矿物质来源——流体包裹体和硫同位素约束 |
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| 关键词:ore-forming fluids migration direction hydrothermal center sulfer isotope molybdenum deposit Dabie Orogen |
| 基金项目:由国家自然科学基金项目(编号: 42172103)、国家重大科技专项计划深地专项项目(编号: 2024ZD1001005)、湖北省自然科学基金项目 (编号: 2023AFD206; 2025AFD439; 2025AFD452)、资源与生态环境地质湖北省重点实验室开放基金项目(编号: HBREGKFJJ-202302; HBREGKFJJ-202403)和地质过程与矿产资源国家重点实验室科技部专项经费(编号: GPMR202424)联合资助。 |
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| Direction of Ore-forming Fluid Migration and Ore Sources in the Limuling Molybdenum Deposit in the Dabie Orogen: Insights from Fluid Inclusions and Sulfur Isotope |
| The evolution and tracing of ore-forming fluids remain key issues for ore deposit prospecting. In this paper, we present an integrated study of fluid inclusion and in situ sulfide sulfur isotope analysis for the Limuling molybdenum deposit in the southern margin of the Dabie Orogen to decipher its origins and trace its fluids. In the main hydrothermal mineralization stage, the ore-forming fluids were characterized by medium-high temperatures (270–322 °C) and moderate salinity values (15.1%–22.7%). The initial ore-forming fluids were derived from magmatic-hydrothermal systems and subsequently mixed with atmospheric water. Fluid mixing resulted in fluid immiscibility (210–300 ℃), and these factors could be the predominant factors in Mo mineralization in the Limuling deposit. The δ34S values of sulfides are positive values ranging from ?0.35‰ to +6.07‰, indicating magmatic sulfur origins. The Limuling deposit is considered to be a magmatic-hydrothermal lode molybdenum deposit formed under medium–high temperature. It shows lower ore-forming temperature than the Dabie-type porphyry Mo deposit in the northern Huaiyang area. We propose that ore-forming fluids moved along the NNE-trending fault. The magmatic-hydrothermal mineralization center is likely located at the external contact zone of the Datong intrusion, which should be a crucial area for Mo prospecting. |
| ZHU Jiang,GUO Mengke,LI Peng,JI Changjun,CHEN Chao,DAI Zhu,LI Xin.2026.Direction of Ore-forming Fluid Migration and Ore Sources in the Limuling Molybdenum Deposit in the Dabie Orogen: Insights from Fluid Inclusions and Sulfur Isotope[J].Acta Geoscientica Sinica,47(1):135-146. |
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