大湖塘矿集区燕山成矿阶段矿床成矿系列研究及找矿问题探讨

Study on metallogenic series of ore deposits during Yanshanian metallogenic period and discussion on ore prospecting in Dahutang ore-deposit-clustered area

大湖塘矿集区位于赣西北九岭成矿带西北部位,区内燕山期岩浆岩侵入活动及成矿作用强烈。大湖塘燕山期岩浆岩形成时间分布在130.3 Ma^151.4 Ma之间,可划分为三次侵入:130.3 Ma^134.3 Ma、140.4 Ma^144.4 Ma、146.4 Ma^151.4 Ma;在144.4 Ma^146.4 Ma之间,岩浆活动处于休宁阶段。区内燕山期岩浆岩与矿床在形成时间上十分接近,空间关系上相互依存,并显示特定的分布格局。根据区内矿床的分布特点、产出位置、成矿时间、燕山期花岗岩与矿床的相关性等特征,可将大湖塘矿集区由北向南依次划分为W、Mo—W、Mo、Cu、Pb、Zn—Cu、Pb、Zn、Au、Ag三个成矿系列,并提出了"北钨南铜"的找矿观点。区内双桥山群与成矿,燕山期岩浆岩的起源,矿床等间距分布,以及重力勘探方面的研究应加强。

Situated in northwest Jiuling ore belt in the northwest Jiangxi province Dahutang ore-depositclustered area is characterized by strong Yanshanian magma intrusion and metallogenic processes.Temporal distribution of the Yanshanian magma intrusion is 130.3~151.4 Ma.130.3~134.3 Ma,140.4~144.4 Ma,146.4~151.4 Ma and 144.4~146.4 Ma dormant.Formation of the YanShanian magmatic rocks and ore deposits is closed temporally and connected spatially.They are distributed in specific pattern.Based on distribution,location,formation time of the ore deposits and correlation between the Yanshanian granite and the deposit Dahutang area is divided into W、Mo~ W、Mo、Cu、Pb、Zn^Cu、Pb 、Zn、Au、Ag,the tree deposit series from north to south thus a viewpoint of prospecting W at north and Cu at south of the area.Study should be focused on relation between Shuangqiaoshan group and ore,source of the Yanshanian magmatic rocks,the equal-distance distribution of the deposits and gravity survey in the area.