吉林省锅盔顶子铜矿区物化探特征及找矿方向研究

Study on geophysical and geochemical characteristics and prospecting direction of Guokuidingzi copper mine area in Jilin Province

吉林省锅盔顶子铜矿区区域大地构造隶属环太平洋大黑山—南楼山钼多金属成矿带,南楼山多金属成矿亚带。研究区多金属矿产主要以铜、钼、铅、锌为主。区内赋存有国内著名的大黑山大型钼矿床、前进中型铜矿床、地局子中型铅锌矿床、新立屯小型铜铅锌矿床以及二道林子铜砷矿床及矿(化)点近百余处,矿产资源十分丰富。研究区岩浆热液活动对铜矿床的形成起着重要作用,为铜矿床的形成提供了热动力条件及成矿热液。本文试图通过对区内找矿前景较好的锅盔顶子铜矿开展深部地球物理调查,以常规激发极化电测深为研究手段,讨论深部铜矿体赋存位置。经浅部槽探揭露验证,成功在锅盔顶子铜矿区深部发现数条铜矿矿体,铜矿体最高品位达0.25%。通过本次工作,为吉林省锅盔顶子铜矿区外围及深部开展地球物理找矿工作提供科学依据和技术支撑。

The regional geotectonics of the Guokuidingzi copper mine area in Jilin Province belongs to the Daheishan-Nanloushan molybdenum polymetallic metallogenic belt and the Nanloushan polymetallic metallogenic sub belt around the Pacific Ocean. The polymetallic minerals in the study area are mainly copper, molybdenum, lead and zinc. There are nearly one hundred deposits and mineralization(chemical) points in the area. The famous ones include Daheishan large-scale molybdenum deposits, Qianjin medium-sized copper deposits, Dijuzi medium-sized lead-zinc deposits, Xinlitun small-sized copper-lead-zinc deposits, Erdaolinzi copper-arsenic deposits, etc. The mineral resources are very rich. The magmatic hydrothermal activity in the study area plays an important role in the formation of copper deposits, which provides thermal dynamic conditions and metallogenic hydrothermal solution for the formation of copper deposits. In this paper, the authors attempt to discuss the occurrence location of deep copper ore body by conducting deep geophysical survey of Guokuidingzi copper deposit, which has a good prospecting prospect in the area, and taking the conventional induced polarization electrical sounding as the research means. Through shallow trenching, several copper ore bodies were successfully discovered in the deep part of Guokuidingzi copper mine area, with the highest grade of 0.25%. This work provides scientific basis and technical support for geophysical prospecting in the periphery and deep of Guokuidingzi copper mine area in Jilin Province.