摘要
吉家洼金矿是华北陆块南缘熊耳山金矿田的一个小型矿床,金矿体赋存于含矿断裂带内,并严格受其控制,矿体的形态、产状与含矿断裂基本一致。通过对矿区外围F1、F7断裂带开展系统的岩石地球化学测量,圈定了多个受断裂控制的高强度Au异常,经钻探施工,见矿情况良好。进一步对钻孔进行了岩石原生晕采样化验和统计分析,结果显示矿体向下有一定的延深,经钻探施工,在断裂深部发现工业矿体,矿床规模扩大至中型。吉家洼矿区外围含矿断裂带数量多、矿化强度高,而地表Au前缘元素非常发育,向深部矿体头部元素及矿体元素发育并伴有前缘指示元素,矿尾元素不发育,已发现的矿体深部不封闭,说明矿体沿倾向具有长距离延深,深部找矿前景好。
The Jijiawa gold deposit in Henan Province,located at the southern margin of North China Craton,is a small-scale deposit in the Xiongershan goldfield. Gold ore bodies are hosted within and have consistent attitudes with the NNE and / or SN trending fault fracture zones,which in turn strictly controlled the shapes and occurrences of the ore bodies. A systematic whole-rock geochemical survey on fracture zones F1 and F7 in the adjacent region of the deposit is carried out,and several high strength Au anomalies controlled by the fractures have been confirmed. After drilling construction,gold ore bodies have been discovered. The statistical analysis on the primary halos of the drilling cores further indicates that the ore bodies extend downwards in some degree.The drilling construction also reveals gold ore bodies in depth developing along the fractures. In terms of calculation on resource reserve,the discovered deposit is medium-sized in scale. There are lots of mineralizing fractures in the adjacent regions of the Jijiawa deposit,in which the primary halos have following characteristics. The front-halo elements are well-developed,but rear-halo elements aren＇t. Moreover,the front-halo elements,main ore-forming halos and rear halo elements are developed at depth. As a result,the new discovered gold ore bodies extend at depth. We thus suggest that there are good ore prospects in the adjacent regions of the deposit.
出处
《地质力学学报》
CSCD
北大核心
2015年第2期260-271,共12页
Journal of Geomechanics
基金
河南省地质勘查基金项目([2010]80)
关键词
吉家洼金矿区
熊耳山金矿田
岩石地球化学测量
找矿预测
深部验证
Jijiawa gold deposit
Xiongershan gold field
rock geochemical survey
metallogenic prediction
engineering verification
