摘要
阳山金矿带是武警黄金部队发现的超大型岩金矿床,通过15年的地质勘查工作,共探获(332+333+334)金资源量340 t。安昌河—观音坝断裂控制了矿带的岩浆热液活动和成矿作用,矿化一般产于千枚岩与斜长花岗斑岩脉内外接触带附近,其矿床规模大,矿体走向NEE,倾向S,倾角50～70°,矿体在走向上分段富集,在垂向上平行等距分布(平距40～120 m),金品位中等,矿化连续,矿床成因类型为浅成低温热液型金矿。阳山矿带被划分为6个矿段:泥山、葛条湾、安坝、高楼山、阳山(观音坝)和张家山矿段。目前,仅安坝矿段和葛条湾矿段地质工作程度相对偏高(达到或接近普查程度,局部达到详查程度),其他矿段地质工作程度相对较低,现多条矿脉走向延伸和深部延深均未完全封闭控制。基于前期的科研和勘查工作,阳山矿区深部显示出良好的找矿前景。通过开展进一步的勘查工作,金矿找矿有望取得新的进展。
Yangshan gold belt is a super-scale gold deposit in Gansu Province.It was discovered by Gold Headquarter of CAPF in 1997,and had 340 tons gold resources （332＋333＋334）.Anchanghe-Guangyinba fault controls the magmatic hydro thermal activity and metallogenesis of the gold belt.Mineralization generally exists in the inner and outer contact belt between plagioclase granite porphyry dikes and phyllite or nearby.Orebody of Yangshan gold deposit whose scale is great,tend towards NEE which obliquity is 50-70° and subsection enrichment,incline to south, has parallel isometric distributing （parallel distance is 40-120 m）, and has middling gold content,continuous mineralization.The genesis of the deposit belongs to shallow epithermal gold deposit.Yangshan gold belt is divided into six ore districts： Nishan,Getiaowan,Anba,Gaoloushan,Yangshan （Guanyinba） and Zhangjiashan.At present,the exploration degree of Anba and Getiaowan are relatively higher than other four ore districts,which had reached survey stage generally and detailed survey stage in local areas.The boundaries along the strike and in the vertical direction of many gold orebodies are not entirely controlled by the exploration engineerings.According to early geological study and exploration,Yangshan gold belt has favorable prospecting potential in deep.Gold prospecting is expected to make new progress through further exploration work.
出处
《黄金科学技术》
2011年第6期1-6,共6页
Gold Science and Technology
关键词
地质勘查
成矿作用
找矿远景
阳山金矿带
甘肃省
Geological exploration
Metallogenesis
Prospecting potential
Yangshan gold belt
Gansu Province
