摘要
黄沙窿铜矿区热液矿床原生晕,严格受南北向与近东西向两组构造控制.与赤铁矿化、白云石化等围岩蚀变有密切关系。区内矿化蚀变与原生晕组分,有明显的垂直分带特征。其中Ⅱ矿带元素分带序列从上至下为Sb—As—Ag—Pb—Cu—Bi—Zn—(As)—Sn。据此可作为前缘与尾缘异常的评价依据。当地表矿体引起的原生异常中,包含明显的Sb、Ag异常,且Sb/Sn>0.3;蚀变以白云石化、赤铁矿化为主,矿石矿物主要为辉铜矿时,说明该矿体向深部尚有较大的延深,延深距离可用文中提到的线性方程来判断。笔者根据前缘异常评价指标,推测ZK_(13)与ZK_(24)间有盲矿存在。
The primary halo of hydrothermal ore deposit in Huangshalong copper ore district is strictly controlled by two groups of structure—meridional and near latitudinal structures, and is closely related to the wall rock alteration such dolomitization and hematitization. The mineralization alteration and the components of the primary halo are of obvious vertical zoning The element zoning sequence of ore belt Ⅱ from top to bottom is Sb-As-Ag×Pb-Cu-Bi-Zn-(As)-Sn. It can accordingly be based to evaluate the front anomaly and rear anomaly. when the primary halo in the surface contains obvious Sb and Ag anomalies, and Sb/Sn ratio is greater than 0.3, and dolomitization, hematitization are the major alteration, and the main ore mineral is chalcocite, it can be concluded that the orebody is of deep extension, and the depth it extends can be estimated through the linar equation metioned in the paper. According to the appraisal criteria for front anomaly, the author predicts by inference that there be hidden orebody between ZK13 and ZK24 boreholes.
出处
《湖南地质》
1992年第3期183-189,共7页
Hunan Geology
关键词
原生晕
分带序列
铜矿床
找矿
Primary halo
Zoning sequence
Front anomaly
