铅同位素在甘肃格尔珂金矿深部找矿中的应用与实践

发布时间：2018-03-28 12:25

本文选题：铅同位素　切入点：隐伏矿床　出处：《地质学报》2017年12期

【摘要】：铅同位素系统剖面化探方法及定量预测模型已经在铀矿床、铜矿床、金矿床和铅锌矿床(深部)找矿中得到了良好的应用和推广。将该方法和预测模型引入到大水金矿田格尔珂金矿(原称大水金矿)深部找矿研究中,并以其对格尔珂金矿12条勘探线的矿体进行了隐伏深度下限HL、隐伏系数R、隐伏资源量QB和富集系数K等模型参数的研究和预测,指示出研究区最佳深部找矿潜力区位于研究区西部,东部的深部找矿潜力最小,中部介于二者之间。最后,结合预测后近8年的实际生产数据和资料,将预测结果与生产实践做对比后表明:研究区的铅同位素定量预测模型构建正确,达到了预测效果,正确指导了研究区的深部找矿工作;在预测潜力最佳的研究区西部实现了深部找矿的重大突破,发现单是一个(Au2)矿体的隐伏资源量就能达到预测模型中全区的隐伏资源量,在研究区中部(Au111矿体)和西部(Au37矿体)也有比预测更大的潜力;用实际的生产实践数据和资料进一步提高了研究区的深部找矿潜力。该文为铅同位素方法在深部找矿中的应用提供了新的成功实例,并以实践资料补充、完善了铅同位素定量预测模型。
[Abstract]:Lead isotopic systematic profile geochemical exploration methods and quantitative prediction models have been used in uranium deposits, copper deposits, The gold deposit and lead-zinc deposit (deep) prospecting have been well applied and popularized. This method and prediction model are applied to the deep prospecting of Geerke gold deposit (formerly known as Dashui gold deposit) in Dashui gold field. The model parameters such as the lower limit of hidden depth (HL), the coefficient of occult (R), the quantity of hidden resources (QB) and the enrichment factor K (K) are studied and predicted for the orebodies of 12 exploration lines in Geerke Gold Mine. It is indicated that the best deep prospecting potential area in the study area is located in the west of the study area, the deep prospecting potential in the east is the least, and the middle part is somewhere between the two. Finally, the actual production data and data of the last 8 years after the prediction are combined. By comparing the prediction results with the production practice, it is shown that the quantitative prediction model of lead isotopes in the study area is correct, the prediction effect has been achieved, and the deep prospecting work in the study area has been correctly guided. A major breakthrough in deep prospecting has been realized in the west of the study area with the best prediction potential. It is found that the hidden resources of a single orebody can reach the amount of hidden resources in the whole area in the prediction model. In the central part of the study area, the Au111 orebody) and the West Hau Au37 orebody) also have greater potential than those predicted. This paper provides a new successful example for the application of lead isotope method in deep prospecting, which is supplemented by practical data. The quantitative prediction model of lead isotope is improved.
【作者单位】：成都理工大学地球科学学院;甘肃省地矿局第三地质矿产勘查院;绵阳师范学院资源环境工程学院;西南石油大学博士后科研流动站;中国科学院同位素地球化学国家重点实验室;
【基金】：国土资源部“国家危机矿山接替资源找矿项目”(编号200662061)资助的成果
【分类号】：P618.51

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