【摘要】：湖北銀洞溝銀金礦床是南秦嶺重要的大型銀礦床,礦體產于武當群變質火山巖中,受剪切構造控制,礦石類型主要為石英脈型。礦相學研究表明,含銀礦物與方鉛礦常同脈產出,從早到晚產出的含銀礦物分別為銀金礦、自然銀、輝銀礦、輝銅銀礦,有從銀礦化向銅礦化轉變的趨勢,反映了成礦流體從早到晚由氧化變?yōu)檫�原。測得與銀金礦密切共生的白云母氬-氬坪年齡為231.0±2.0 Ma(MSWD=0.96),反等時線年齡為229.5±1.4 Ma(MSWD=0.73),與前人測得的本區(qū)剪切帶多硅白云母氬-氬年齡一致,表明成礦作用與區(qū)域剪切構造變形有關。
[Abstract]:Yindonggou silver gold deposit in Hubei Province is an important large silver deposit in the South Qinling Mountains. The orebody occurs in the volcanic rocks of Wudang Group and is controlled by shear structure. The ore type is mainly quartz vein type. The metallographic study shows that the silver-bearing minerals are often produced in the same vein as galena, and the silver-bearing minerals produced from morning to evening are silver gold deposits, natural silver, pyroxene and copper-silver deposits, which tend to change from silver mineralization to copper mineralization. It reflects that the ore-forming fluid changes from oxidation to reduction from morning to night. The argon-argon plateau age of Muscovite closely associated with silver gold deposit is 231.0 鹵2.0 Ma (MSWD=0.96), and the inverse isochron age is 229.5 鹵1.4 Ma (MSWD=0.73), which is consistent with the argon-argon age of polysilicon Muscovite in the shear zone. It is shown that mineralization is related to regional shear structural deformation.
【作者單位】： 北京大學造山帶與地殼演化教育部重點實驗室;
【基金】：國家自然科學基金項目(批準號:41373043) 全國危機礦山接替資源找礦項目(編號:20089934)
【分類號】：P618.5

【參考文獻】

相關期刊論文 前10條

1 孟旭陽;王曉霞;柯昌輝;李金寶;楊陽;呂星球;;南秦嶺華陽花崗巖LA-ICP-MS鋯石U-Pb年齡、地球化學和Hf同位素組成——對五龍巖體群成因的約束[J];地質通報;2013年11期

2 張永清;張健;李懷坤;陸松年;;南秦嶺武當山群變質酸性火山巖鋯石U-Pb年代學[J];地質學報;2013年07期

3 毛世東;陳衍景;周振菊;魯穎淮;;南秦嶺東河群碎屑鋯石U-Pb年齡及其板塊構造意義[J];巖石學報;2013年01期

4 陳衍景;;秦嶺印支期構造背景、巖漿活動及成礦作用[J];中國地質;2010年04期

5 凌文黎;段瑞春;柳小明;程建萍;毛新武;彭練紅;劉早學;楊紅梅;任邦方;;南秦嶺武當山群碎屑鋯石U-Pb年代學及其地質意義[J];科學通報;2010年12期

6 李文博;周衛(wèi)東;陳世昌;李應平;鄧小華;鐘日晨;;湖北銀洞溝銀礦床地質特征與成因類型[J];地學前緣;2010年01期

7 弓虎軍;朱賴民;孫博亞;李r，

本文編號：2496711