山东蓬莱大赵家地区金矿蚀变带地球物理特征及找矿方向

Geophysical Characteristics and Prospecting Direction of Dazhaojia Area in Penglai City in Shandong Province

摘要:

综合地球物理方法对隐伏金属矿产勘查具有良好的指示作用，研究区位于胶东半岛北部、栖霞蓬莱成矿带西侧大赵家地区，金矿成矿地质条件优越。本文针对蓬莱大赵家地区,利用岩矿石之间的物性差异,通过综合地球物理勘探圈定物探异常,发现多条矿化蚀变带，其中Ⅰ号、Ⅲ号蚀变带规模相对较大，并在平面和垂向上反应蚀变带的赋存特征，基本了解了该区蚀变带的分布及深部特征；根据区域地质、地球物理特征结合物探工作成果,分析了蓬莱大赵家地区金矿找矿前景,认为Ⅰ号、Ⅲ号蚀变带成矿潜力较好，为下一步该区金矿找矿工作指明了方向,对指导该区地质找矿具有重要意义。

Abstract:

Comprehensive geophysical methods have a good indicative effect on the exploration of concealed metal minerals. The study area is located in the north part of Jiaodong Peninsula and the west part of Qixia Penglai metallogenic belt in Dazhaojia area. Geological conditions for gold mineralization is very good. In this paper, focusing on Dazhaojia area in Penglai city, by using the differences in physical properties between rocks and ores, through comprehensive geophysical exploration, geophysical anomalies have been delineated. Multiple mineralized alteration zones have been discovered. Ⅰand Ⅲalteration zones are relatively large in scale, and reflect the occurrence characteristics of alteration zones in both horizontal and vertical directions. Distribution and characterisitcs of alteration zones in the area have been studied. Based on regional geological and geophysical characteristics, combining with the results of geophysical exploration, the prospecting prospects for gold deposits in Dazhaojia area in Penglai city have been analyzed. It is believed that the mineralization potential of Ⅰand Ⅲalteration zones is good. It will point out the direction and guide the next prospecting.