摘要
在1/5万察哈尔右翼前旗等四幅区域矿产地质调查的基础上,通过化探系统采集样品、地质填图和综合找矿方法发现了桦树沟金矿,并对金矿成矿提出了新的认识。野外地质研究发现,桦树沟矿区NE、近EW向断裂控制着异常展布及地表构造蚀变带和铁锰矿化体的延伸,围岩及矿化蚀变主要有硅化、钾化、绢云母化及沿裂隙充填的铁锰矿化和褐铁矿化。运用综合找矿方法筛选找矿靶区,将桦树沟异常面积从28.8 km2缩小到3.6 km2,有助于更好地找寻金矿床。采用水系沉积物和土壤测量方法对矿区异常元素进行了测试,并根据富集系数讨论富集成矿问题,结果显示:与成矿关系密切的桦树沟岩体强富集元素有Ag、Pb、Zn、As、Sb、W、Bi和Mo等,其围岩集宁岩群富集—强富集元素有Ag、Pb、Au、Cu、As、Sb、W和Mo等,表明岩浆活动为成矿提供了含矿热液,而热液又与围岩发生交代,导致金银等多金属在成矿有利部位富集成矿。结合1/1万地质填图、1/1万土壤测量等方法进一步开展异常检查评价,发现多个样品含量已达矿石边界品位,异常浓集中心及分带明显,经探槽工程揭露并圈定出2条金矿体,其分布特征、物质组成和控矿因素已基本查明,表明该区具有良好的找矿前景。
Huashugou gold mine was found, and the new understanding of gold mineralization was put forwardbasis on the geological survey in four 1/50 000 regional map of Chahar right Qianqi, etc ,by using the geochemicalsamples exploration,geological mapping and the comprehensive prospecting methods.Field geological studyfound that NE and nearly EW trend faults control the distribution of the abnormal faults and the outspread of thesurface structure alteration belt and iron manganese ore body in the mining area.The surrounding rock andmineralization alteration are mainly silicide, potassium, sericitization and along the fissure filling iron manganeseore and limonite.Selecting the prospecting target area by comprehensive prospecting method, Huashugou anomalyarea were reduced from 28.8 km2 to 3.6 km2, help to better looking for gold deposit.By using stream sediment andsoil measurement method, anomaly elements were tested, and according to the enrichment coefficient, the resultsshowed that Ag, Pb, Zn, As, Sb, W, Bi, Mo, etc., has strong enrichment in Huashugou groove rock, and closelyassociated with mineralization, its surrounding rock, the Jining Group are enrich and strong enrich in Ag, Pb, Au,Cu,As, Sb,W, Mo, etc., show that magma activity provides a ore-bearing hydrothermal mineralization,andhydrothermal metasomatic with surrounding rock, causing much metals such as gold and silver enrichment in thefavourable area.Combining 1/10 000 geological mapping methods and soil measuring,further anomalyexamination and evaluation was conducted,found multiple ore sample content with cutoff grade,obviousabnormal thick concentrated heart and zoning.The implementation of exploratory trench engineering expose andmark out two gold orebodies,the distribution feature,composition and ore-controlling factors have beenidentified, indicating that the area has good ore prospects.
作者
吴家富
王翔
黄俊
WU Jiafu WANG Xiang HUANG Jun Anhui(Institute of Geological Survey, Hefei 230001 ,Anhui, China)
出处
《黄金科学技术》
CSCD
2016年第6期32-38,共7页
Gold Science and Technology
基金
内蒙古地质勘查基金项目"内蒙古乌兰察布市察哈尔右翼前旗等四幅1:5万区域矿产地质调查"(编号:[2008]矿调2-22)资助
关键词
综合找矿
地球化学
桦树沟金矿
内蒙古
comprehensiveprospecting
geochemistry
Huashugougolddeposit
InnerMongolia
