沂沭断裂带中段金矿特征及找矿方向研究

Study on Characteristics and Prospecting Direction of Gold Deposit in Middle Section of Yishu Fault Belt

沂沭断裂带是中国东部著名的深大断裂,由4条大断裂组成,沂水-汤头断裂是其4条主干断裂之一。近几年来,在该断裂上发现了龙泉站、牛家小河、南小尧等金矿,使沂沭断裂带金矿找矿取得了突破。该文在研究金矿地质背景、矿床地质特征、矿床成因的基础上,归纳总结了金矿类型、成矿规律,认为沂沭断裂带不但导矿,而且储矿,提出了新的找矿方向,为沂沭断裂带乃至整个郯庐断裂带进一步开展金矿找矿工作提供了依据。

Yishu fault belt is a famous deep fault belt in eastern China.It is composed of four dominant faults.Yishui-Tangtou fault is one of the four fault belts.In recent years,Longquanzhangold deposit,＆nbsp;Niujiaxiaohe gold deposit and Nanxiaoyao gold deposit have been discovered,which have made a break-through in gold ore prospecting of this fault belt.In this paper,on the basis of studying geological back-ground,deposit geological characteristics and the origin of ore formation,gold ore types and ore-forming rules have been summarized.It is regarded that Yishu fault belt not only can lead the ore-forming,but also can reserve gold ore.A new propecting direction has been put forward as well.It will provide some basis for gold ore exploration in Yishu fault belt and even in Tanlu deep fault belt.