胶东郭城—崖子地区金矿成矿规律及找矿潜力探讨

Study on Metallogenic Regularity and Prospecting Potential of Gold Deposits in Guocheng—Yazi Area in Jiaodong

摘要:

胶莱盆地东北缘郭城—崖子地区是近年来发现的一个重要金成矿区，陆续探明一批大中型—超大型金矿床。本文采用典型矿床类比方法，对蓬家夼、西井口、西涝口和辽上金矿床进行成矿规律研究，通过对该区内矿床、矿体和矿化富集规律以及蚀变矿化分带研究，建立深部矿体定位模型标志，评价找矿潜力。确定本区西南部更靠近盆地边缘的土堆沙旺矿区为深部找矿靶区，结合矿区内物化探异常特征分析，推测控矿构造由NNE向转为NEE向且与NW向构造交会处是成矿有利部位，预测了3个靶区，显示土堆沙旺矿区深部较大的找矿潜力。

Abstract:

Guocheng—Yazi area in the northeastern margin of Jiaolai basin is an important gold deposit discovered in recent years. A number of medium and large scale gold deposits have been discovered successively, while TuduiShawang gold deposit has not made any breakthrough. In this paper, metallogenic regularity of Pengjiakuang, Xijingkou, Xilaokou and Liaoshang gold deposits have been studied by using the analogy method of typical deposits. Through study on the deposits, ore bodies, mineralization enrichment rules and alteration mineralization zone, positioning model marks of deep ore bodies have been established. It is determined that the main ore controlling structures in TuduiShawang area is distributed with the trend of NNE and NEE. Combining with the analysis of geophysical and geochemical anomaly characteristics in the area, it is speculated that the ore controlling structure is changing from NNE to NEE, and the intersection structures with the trend of NW are favorable for mineralization. Three target areas have been predicted, which indicates that the deep prospecting potential is huge.