山东蓬莱北部郭家岭期岩体深部形态及与金矿床对应关系

Deep Morphology of Guojialing Rock Mass and Relationship with Gold Deposit Positioning in Northern Penglai in Shandong Province

摘要:

胶东蓬莱北部分布着众多石英脉型金矿床，其形成多与郭家岭期岩体有关。本文分析了上口王李金矿床、西南王金矿床、三丁家金矿床，其主矿体多赋存于郭家岭期岩体内部或与围岩栖霞序列岩体接触带附近。在三处典型矿床进行的可控源音频大地电磁测深（CSAMT)剖面初步揭露了郭家岭期岩体的深部形态，即总体呈岩盆状下伏于新太古界侵入体之下，厚度自北向南、自东向西逐渐减小。岩体顶界面波状起伏的位置往往对应了区内主要金矿床，岩体界面凹部是矿体形成的有利部位。

Abstract:

There are many quartz vein gold deposits in northern Penglai of Jiaodong area. Its formation has close relation with Guojialing rock mass. In this paper, Shangkouwangli gold deposit, Xinanwang gold deposit and Sandingjia gold deposit have been analyzed and studied. Most of their main orebodies exist in Guojialing rock mass or near the contact zone of Qixia rock mass. As showed by CSAMT profiles conducted at three typical deposits, deep morphology of Guojialing rock mass has been revealed. It is generally a rock basin under Neoarchean intrusion. Its thickness gradually decreases from north to south and from east to west. The undulating position of the top interface of rock mass often corresponds to main gold deposits in the area. and the interface concavity of rock mass is favorable position for the occurrence of ore bodies.