江苏溧水胡家店地区土壤地球化学特征及找矿预测

总结了胡家店地区的地质特征,并对该区1∶1万土壤地球化学测量元素含量特征及元素组合特征进行了细致研究,认为该区Au、Ag、Cu、Pb、As、Mo、Hg等地球化学异常显示明显,其中Au、Ag、Cu、Mo是找寻金矿的土壤地球化学指示元素。 Au、Ag、Cu、Mo异常强度大、分带好、浓集中心和峰值明显,异常范围受测区内张性构造破碎带及闪长玢岩小岩株或小岩脉等控制。在该区圈定出H?1~H?8八处组合异常,其中H?1~H?4四处组合异常的地质成矿条件优越,各单元素异常内带规模大、强度高,浓集中心和峰值明显,异常叠合程度好,Au、Cu异常浓集中心较吻合,具较好的金矿找矿前景。对H?1组合异常开展了槽探查证工作,新发现2条金矿脉,平均品位(2.03~2.37)×10-6。结合测区地质成矿条件和土壤地球化学异常特征,初步总结了胡家店地区金矿找矿标志,并圈定出测区西北部西寨山—龙宫山一带为金矿找矿靶区,为该区进一步找矿提供指导。

Soil geochemical characteristics and prospecting prediction of the Hujiadian area in Lishui,Jiangsu Province

This paper summarized geological features, geochemical characteristics and element composition of soil survey data on the scale of 1∶10 000 in Hujiadian area. It is shown that there exist high intensity, good zonation and obvious concentration centers of such anomalous elements as Au, Ag, Cu, Mo associated with gold deposits. The range of anomalies is spatially coincident well with tensile structural fracture zone and diorite?porphyrite vein rock in the study area. 8 combined anomalies ( H?1~H?8) were delineated, of which H?1~H?4 have good metallogenic geological conditions and anomalous features and hence show favorable prospecting potential for gold. Trenches were constructed for H?1 combined anomaly, and two gold veins were found with grade (2.03~2.37) ×10-6 Prospecting crite?ria for gold were summarized according to metallogenic geological conditions and geochemical anomalous features in Hujiadian area. A prospecting target area for gold deposit was delineated along Zhaishan?Longgongshan zone in the northwest of the study area. Thus, Hu?jiadian provides a case for the exploration of gold in Jiangsu Province.