全文快速搜索:          
引用本文:刘铁生. 大义山矿田岩体型锡矿地质特征及矿床成因[J]. 中国地质, 2002, (4): 411-415.
Liu Tie sheng. Geological characteristics and genesis of rock body-type tin deposits in the Dayishan ore field[J]. Geology in China, 2002, (4): 411-415(in Chinese with English abstract).
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 748次   下载 1237 本文二维码信息
码上扫一扫!
分享到: 微信 更多
大义山矿田岩体型锡矿地质特征及矿床成因
刘铁生
湖南省地质调查院湘中矿产所,湖南 娄底 417000
摘要:
提要:大义山岩体型锡矿产于汤市铺超单元的晚期介头单元(J2J),品位中等偏低、易选、规模大,形成于局限封闭环境,具垂直分带。区域性构造、岩浆岩、围岩及局限环境联合控制了岩体型锡矿的产出及规模。笔者分析研究了岩体型锡矿的成因:岩浆在局限环境下分异演化,成矿元素不均匀分配,使介头单元侵入体富含W、Sn,在侵入体前峰或上拱部位形成岩体型锡矿的理想成矿模式和岩体型锡矿床垂向上由上而下,具由高温至低温的蚀变与矿化分带特征。
关键词:  岩体型锡矿  地质特征  矿床成因  介头单元  大义山
DOI:
分类号:
基金项目:中国地质调查局国土资源大调查项目(199910200220)资助。
Geological characteristics and genesis of rock body-type tin deposits in the Dayishan ore field
Liu Tie sheng
Central Hunan Institute of Mineral Resources, Hunan Institute of Geological Survey, Loudi 417000, Hunan, China
Abstract:
Abstract: Rock body-type tin deposits in Dayishan, Hunan, occur in the Late Jurassic Jietou unit of the Tangshipu super-unit. The ore is slightly below the medium grade and easy to dress. The deposits are large in size and formed in a restricted environment, showing vertical zoning. Regional structures, magmatic rocks, country rocks and restricted environment jointly control the occurrence and size of the rock body-type tin deposits. In this paper the genesis of the rock body-type tin deposits is analyzed. As the magma is differentiated and evolved in a restricted environment, ore-forming elements are unevenly distributed, causing the intrusion of the Jietou unit to be rich in W and Sn and an ideal metallogenic model of rock body-type tin deposits is formed in the front or uparching portion of the intrusion. From above downward the rock body-type tin deposits show the characteristics of vertical zoning of alteration and mineralization from high to low temperatures.
Key words:  rock body-type tin deposit  geological characteristics  genesis of deposit  Tietou unit  Dayishan