摘要
北山地区位于新疆东部塔里木地块东北缘，东西长约３００ｋｍ，南北宽约１００ｋｍ，近来发现了一系列金矿点。该区主要由古生界的沉积－火山岩系组成，局部含太古界至下元古界的结晶基底，覆中新生界盖层。两期重要的玄武质岩浆活动与金矿化有关。金矿点产于前寒武纪的准绿片岩中，但主要产于石炭纪的硅化和黄铁矿化岩石中，由走向ＮＥＥ－ＳＷＷ向的大型逆断层控制。金矿源来自上地幔部分熔融产生的玄武岩，后期经活化富集于北山地区南部推覆前缘叠瓦断层带中。矿物的晶形、成分、物性可作为良好的找矿标志。研究表明，北山地区有可能找到大型或超大型金矿床。
Located on the northeastern border of the Tarim Craton in Eastern Xinjiang, Beishan area extends from west to east for about 300 km and from north to south 100 km, in which a series of gold deposits have newly been discovered. It comprises blocks of crystalline basement (Archean to Lower Proterozoic) with folded metamorphic basement (Middle to Upper Proterozoic), Palaeozic volcano sedimentary rocks, and a Mesozoic to Cenozoic cover. Two important basaltic activities were identified to be related to the gold mineralization. Gold deposits occur in the Precambrian para greenschists and mainly in the Carboniferous carbonous formations with silicification and pyritization, usually controlled by large NEE SWW thrusts. The source of gold deposits were derived from the basalts originated in partial melting of upper mantle during the Carboniferous and Permian period, and later enriched in the frontal imbricated fault zones of the large thrust nappes. The mineral forms, chemical compositions and physical properties can be used as good marks for prospecting gold deposits. The new data obtained from this study show that prospective large and ultra large gold deposits can be formed in Baishan area.
出处
《成都理工学院学报》
CSCD
1997年第3期1-4,共4页
Journal of Chengdu University of Technology
基金
地质矿产部资源与环境科技攻关课题
关键词
控矿因素
找矿标志
北山地区
新疆
金矿床
mineralization pattern
prospecting mark
gold deposit
Beishan area
Eastern Xinjiang
