赣东北塔前钨钼矿区成矿地质条件与找矿潜力探讨

Metallogenic Geological Condition and Prospecting Potential of Taqian W-Mo Deposit in Northeastern Jiangxi Province

塔前钨钼矿床与朱溪钨铜矿床同处一构造岩片内。通过与区内朱溪超大型钨矿床进行成矿地质条件及物化遥综合异常特征等方面的对比研究,认为二者具有相似的成矿地质条件;根据塔前矿区地球物理异常特征及其浅部花岗闪长斑岩侵入体、中酸性岩脉、矿化蚀变分布特征分析,认为深部可能存在隐伏岩体和夕卡岩型矿体;结合区内岩体及滑脱断裂带形态特征,认为塔前矿区花岗质岩浆是沿F2滑脱断裂面上侵并与碳酸盐岩接触交代,可能在其深部转折端或平缓处形成“朱溪式”厚大夕卡岩型矿床,具有较大的找矿潜力。

The Taqian W-Mo polymetallic deposit is located in the same tectonic sheet as the Zhuxi W-Cu deposit.Based on the comparative study with Zhuxi super-large tungsten-copper deposit in the area,the geological characteristics and comprehensive abnormal characteristics of geophysics,geochemistry and remote sensing are considered to have similar metallogenic geological conditions.According to the analysis of geophysical anomalies and the distribution characteristics of granodiorite porphyry intrusion,moderate-acid dykes and mineralized alteration of the Taqian mining area,it is believed that skarn-type orebody and concealed orebody may exist in the deep.Combining the morphological characteristics of the intrusion and detachment fault zone in the area,it is concluded that the granitic magma intruded along the F2 detachment fault interface and contacted with the carbonate rocks,possibly forming Zhuxi-type thick skarn deposit at its deep hinge or gentle parts,which has great ore-prospecting potential.