山东招远——平度断裂带南段地球物理特征及找矿预测

Geophysical Characteristics and Prospecting Prediction of Southern Zhaoyuan-Pingdu Fault Belt in Shandong Province

摘要:

以招平断裂带南段为研究对象，综合利用招平断裂带的地质、重力、磁法、大地电磁等资料总结了研究区的重磁场特征及岩石的物性特征，并通过5条典型剖面开展可控源音频大地电磁测深（CSAMT），进一步查明了研究区的成矿条件和找矿前景。根据CSAMT实测数据，反演及推断了招平断裂带南段深部的延深及变化情况，推测脆性断裂是招平断裂带南段金矿找矿的关键因素并据此在实测剖面上圈定了8处成矿有利靶区。本文认为研究区的北部具有较好的成矿条件和找矿潜力。

Abstract:

Taking the southern part of Zhaoping fault belt as the research object, by using geology, gravity, magnetic and magnetotelluric data of Zhaoping fault belt, the gravity and magnetic characteristics and the physical properties of rocks in the study area have been summarized comprehensively. By selecting five typical sections in the north of the study area, the controlled source audio frequency magnetotelluric sounding (CSAMT) is carried out. The metallogenic conditions and prospecting prospects in the north of the study aera has been identified furthurly. According to the CSAMT data, the deep extension and variation of the southern Zhaoping fault belt have been inverted and conducted. It is speculated that brittle fault is the key factor for gold ore prospecting in southern Zhaoping fault belt.Eight favorable metallogenic areas have been circled on the measured section. It is regarded that the northern part of the study area has good metallogenic conditions and prospecting potential.