如何开展老矿山后备资源的寻找与定位预测——工作程序与实例分析

How to predict and localize potential concealed mineral resources in depths at an aged mining district ——working model and case study

在老矿山的深部与外围寻找新的可用资源,要求勘探者具备新的找矿思路、行之有效的深部探测手段与合理的工作程序.新的找矿思路来自于研究者的相关知识储备和创新能力,使其不墨守成规,用新的视角重新认识矿化规律和控矿要素,进而在老矿区优选出潜在的有利成矿区段.行之有效的深部探测手段以其高分辨的数字图像,不仅可以客观地反映深部地质结构的各种变化及矿化信息,以验证地质推测的可靠性,而且借助属地化的解释模型对矿区深部和外围开展真正意义的矿体定位预测.同时还可以大大降低工程验证的盲目性和巨大浪费.根据我们目前拥有的先进地球物理深部探测手段和大量老矿山找矿的经验与教训,逐渐形成了一套实用的工作程序.

Searching for potential concealed mineral resources of economic interest in and around an aged mining district requires explorers to be prepared with the following capacities and power: 1) renewed ideas of generalizing in-situ mineralization styles, ore-controlling structures and local geology; 2) cost-effective and powerful exploration devices and equipment of deep penetration; 3) efficient working procedures. The renewed ideas of explorer, not as a routineer, stem from absorption of relevant knowledge and experience to scrutinize in-situ mineralization and geological structures in order to pick out potentially favorable mineralized targets in the working district. Powerful geophysical methods are extremely of importance in locating the blind or concealed orebodies under burden, by producing high-resolution images of subsurface geological structures and mineralization in the form of geophysical anomalies. Those geophysical images in combination with rational interpretation modeling can, not only test and verify previous geologically-suggested features of mineralization, but also provide objective prediction information regarding ore localization. Furthermore, the cost-effective and well-organized geophysical exploration programs can significantly reduce the inherent risks and amounts of geological drillings. Based on our experience of both success and failing concerning mineral exploration, and the geophysical surveying methods we have, an effective and useful working procedure for blind ore exploration has become reality.