赣东北景德镇四村矿化蚀变带成矿地质条件及找矿潜力

Metallogenic geological conditions and prospecting potential of the Sicun mineralized alteration zone in Jingdezhen,northeastern Jiangxi Province

四村矿化蚀变带是在塔前—赋春矿集区新发现的1处铜多金属矿化蚀变带,通过与朱溪钨铜多金属矿床进行地质、矿化蚀变、地球物理-地球化学-遥感异常等对比,认为二者的成矿地质条件相似。根据四村地区浅表闪长玢岩、煌斑岩和辉长辉绿岩脉地质特征,推测其深部可能存在花岗质岩体。结合晚古生代碳酸盐岩、断裂破碎带和层间破碎带地质特征,推测花岗质岩浆上侵并与碳酸盐岩接触交代,可形成矽卡岩型矿床或热液脉型矿床,具有较好的找矿潜力。下一步找矿重点为侵入岩与碳酸盐岩接触带、断裂带和层间破碎带。

The Taqian-Fuchun ore concentrated area was recently discovered to host a Cu-polymetallic mineralized alteration zone at Sicun.Comparison study of the Sicun mineralized alteration zone with the large-sized Zhuxi W-Cu polymetallic deposit in geology,mineralization,alteration,and geophysical-geochemical-remote sensing anomalies indicates that the Sicun area has similar minerogenetic geological condition as the Zhuxi deposit.According to the geological characteristics of diorite porphyrite,lamprophyre,and gabbro-dolerite dykes in the Sicun area,we can infer existence of granitoids at depth.Combined with the late Paleozoic carbonate rocks,faulting zones,and interlaminar fractures,it can be speculated that uprising granitic magma etasomatized carbonatic rocks,forming skarn-type deposits or hydrothermal vein-type deposits,both of which may have relatively great potential for mineralization.Therefore,the next prospecting target should focus on the contact zone between intrusive rock and carbonatic rock,fracture zone and interlayer fracture zone.