中南大学学报（自然科学版）2018，Vol.49Issue(3)：633-641,9.DOI:10.11817/j.issn.1672-7207.2018.03.017
湖南锡田钨锡多金属矿田成矿分带样式及机理
Mineralization zone styles and mechanism of Xitian Tin-Tungsten Polymetallic orefield, Hunan Province
摘要
Abstract
In order to understand the distribution disciplinarian of ore deposits and their genetic relationship in Xitian ore-forming system, fourteen Yanshanian magmatic-hydrothermal deposits were studied through geological survey and microscopic mineralogy observation. The distribution of mineralization type, ore mineral association and homogenization temperature of fluid inclusions in Xitian orefield were determined. The results show that there are two ore-forming regions distributed in the southern and northern Xitian area, respectively, and each of the region has its own hydrothermal center with a clear regular zone mineralization distribution of W-Sn,Pb-Zn and fluorite deposits. Homogenization temperature of fluid inclusions is consistent with mineralization zone in term of spatial distribution. The temperature decreases continuously from W-Sn deposits (215?384 ℃) to fluorite deposits (136?194 ℃). Two ore-forming systems show high concentrations of LREE and HREE, low concentrations of MREE, obvious positive Eu anomalies (δw(Eu)=7.93?43.58), and the W-type chondrite-normalized REE patterns. Combined with S and Pb isotopic data and mineralization age in the orefield, these ore deposits are formed in the Yanshanian magmatic-hydrothermal event with similar source of mineralizing components, and the minerogenic zoning patterns may be constrained by the thermal gradient pattern of the magmatic-hydrothermal system.关键词
矿化分带/矿物组合/均一温度/稀土配分模式/锡田矿田Key words
mineralization zone/mineral association/homogenization temperature/REE distribution pattern/Xitian orefield分类
天文与地球科学引用本文复制引用
刘飚,吴堑虹,奚小双,孔华,蒋江波,林智炜,曹荆亚..湖南锡田钨锡多金属矿田成矿分带样式及机理[J].中南大学学报（自然科学版）,2018,49(3):633-641,9.基金项目
中国地质调查局整装勘查项目(12120114052101) (Project(12120114052101) supported by Integrated Exploration Program of the China Geological Survey) （12120114052101）
