北武夷山地区银矿地质特征及成因探讨
投稿时间:2020-03-11  修订日期:2020-05-09  点此下载全文
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作者单位E-mail
郑师雄 江西省核工业地质局二六五大队 zsx265@126.com 
中文摘要:北武夷山地区位于华夏板块,地处武功山-会稽山前缘褶冲带之饶南坳陷内,是江西抑或是我国一条重要的多金属成矿带。带内银矿床发育,根据其含矿围岩不同可分为岩浆岩型、沉积岩型、变质岩型及风化壳型等四大类。银成矿作用主要受地层建造、岩浆岩活动以及不同级别的构造作用控制。以岩浆岩-斑岩亚型和变质岩-区域变质岩亚型为代表,用“三位一体”成矿理论详细分析区内银成矿特征,从而总结出北武夷山地区银成矿条件。此外,冷水坑矿区硫具塔式分布,δ34S%均在1~5之间,其平均值3.47 ,S同位素组成均一化程度较高,成矿环境相对稳定,接近陨石硫,硫来自地壳深部,而铁沙街矿床含矿地层硫同位素组成(34S%为3.2~7.2、32S/34S为22.060~22.148),表明可能来源于地幔。
中文关键词:北武夷山  银矿  地质特征  成矿条件  成因探讨
 
Discussion on geological characteristics and genesis of silver ore in north Wuyi mountain area
Abstract:The north Wuyi mountain area is located in the Huaxia plate, located in the raonan depression of the fold and gully belt of the Wugongshan-Wuaijishan leading edge. It is an important polymetallic metallogenic belt in the west of the Yangzi river or in China. According to the different ore-bearing surrounding rocks, the silver deposits in the belt can be divided into four types: magmatic rock type, sedimentary rock type, metamorphic rock type and weathering crust type. Silver mineralization is mainly controlled by formation formation magmatic rock activity and tectonic action of different levels. Represented by magmatic and porphyry subtypes and metamorphic and regional metamorphic subtypes, the paper analyzes the characteristics of silver mineralization in detail with the "trinity" metallogenic theory, and summarizes the conditions of silver mineralization in the northern Wuyi mountain area. In addition, the sulfur distribution of tower, Lengshuikeng mining area delta 34 S % are between 1 ~ 5, the mean value of 3.47, S isotope composition of homogenization degree is higher, the ore-forming environment is relatively stable, close to the meteorite sulfur, sulfur from the deep crust, and the sulfur isotopic composition (34S %, 3.2 ~ 7.2, 32S / 34S, 22.060 ~ 22.148) of the ore-bearing formation of Tieshajie deposit indicates that it may come from the mantle.
keywords:North Wuyi  silver  geological features  metallogenic conditions  cause to investigate
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