矿产综合利用2025，Vol.46Issue(1)：16-29,14.DOI:10.3969/j.issn.1000-6532.2025.01.003
滇西勐糯铅锌矿床流体包裹体研究及矿床成因探讨
Study on Fluid Inclusions and Genesis of Mengnuo Lead-zinc Deposit in Western Yunnan
摘要
Abstract
The Mengnuo Pb-Zn deposit is a large Pb-Zn one in the Pb-Zn-Cu-Fe-Hg-Sb-As-Au metallogenic belt of Baoshan(block).There are different views on the genesis of the deposit,such as sedimentary-reworked type,exhalative sedimentary type(SEDEX)and hydrothermal type deposit(MVT).In this paper,the fluid inclusions of calcite,quartz,barite and sphalerite in Mengnuo lead-zinc deposit are studied to explore the source of the ore-forming fluid and the genesis of the deposit.The results show that the homogenization temperature of the whole metallogenic period of the deposit obeys the normal distribution,and the mode is 170～280℃,which is medium and low temperature.The salinity of the ore-forming fluid is 4.03%～12.73%NaCl,which belongs to the low salinity unsaturated ore-forming fluid.The fluid density of the whole metallogenic period is mainly 0.778～0.978 g/cm3,which shows medium density characteristics.The ore-forming fluid is low-salinity and medium-density one with CO2 and H2O as the main components.Combined with the study of geological characteristics and isotopic geochemical characteristics of the deposit,it is considered that the Mengnuo lead-zinc deposit should be a medium-low temperature hydrothermal lead-zinc deposit related to intrusive magmatic geology.关键词
流体包裹体/成矿流体/中低温热液型/勐糯铅锌矿床/滇西Key words
Fluid inclusions/Ore-forming fluids/Medium-low temperature hydrothermal type/Mengnuo lead-zinc deposit/Western Yunnan分类
矿山工程引用本文复制引用
邢永辉,缪发金,吴文贤,马云良,张岐能,杨积转..滇西勐糯铅锌矿床流体包裹体研究及矿床成因探讨[J].矿产综合利用,2025,46(1):16-29,14.基金项目
滇西保山地块西缘金多金属矿成矿规律及找矿方向研究 （）
中国地质大调查项目(DD20243091) （DD20243091）
云南永昌铅锌股份有限公司勐糯矿区及外围综合研究与找矿预测(1908YCQX-ZYB11) （1908YCQX-ZYB11）
