关键词: 锑矿, 大幕山背斜, 地质特征, 控矿因素, 沉积, -改造型

Abstract: The Damushanxia antimony deposit is a newly discovered antimony deposit in Tongshan County，Hubei Province. The ore-bearing lithology is silicified cataclastic rock，cataclastic thin-layer do⁃ lomite，silicified cataclastic limestone dolomite，silicified cataclastic dolomite，accompanied by silicifica⁃ tion，calcite and barite. The antimony-bearing minerals are mainly stibnite. Previous studies have not been carried out on its metallogenic geological characteristics，ore-forming material sources，ore genesis and prospecting prospects. Field geological survey，stibnite S isotope，barite S isotope test and stibnite fluid in⁃ clusion temperature measurement are comprehensively used . The results show that the average value of δ34S of two stibnite samples in the ore is +12.5‰，and it is considered that the sulfur in area is mainly de⁃ rived from sedimentary sulfur. The δ34S isotope value of one barite in the ore is +26.0‰，indicating that the sulfur in the area is derived from seawater biodeposition or marine evaporite. The detonation temperatures of two stibnite samples are 211 ℃ and 218 ℃，respectively，which belong to the category of medium and low temperature. It is considered that the ore-forming materials of the deposit are mainly derived from the surrounding rock strata，and the nearly east-west F1 fault is the ore-conducting and ore-hosting structure in area. It is pointed out that the genetic type of antimony deposits in area belongs to sedimentary-trans⁃ formed antimony deposits. Through the formulation of ore-controlling factors and prospecting indicators，it is pointed out that the east of Wangchenya Reservoir，the west of Damushanxia and the deep part of known ore bodies are favorable areas for subsequent prospecting，and it is suggested to carry out further explora⁃ tion work.

Key words: antimony deposit, Damushan anticline, geological characteristics, ore-controlling fac? tors, sedimentary-transformed type