有利因素相关法在松潘地区“东北寨式”金矿资源评估中的应用

The application of the favourable factor correlation method to the mineral resources assessment of the “Dongbeizhai-type” gold deposits in Songpan, Sichuan

关键词:  有利因素相关法  松潘地区  “东北寨式”金矿  资源量预测

Key words:  favorable factor correlation method  Songpan region  “Dongbeizhai-type” gold deposits  mineral resources prediction

摘要:

据"东北寨式"金矿的成矿模式,结合松潘地区的成矿条件、地球化学异常评价以及资料水平和工作程度等,选择"有利因素相关法"对本区内334资源量进行了远景预测,取得了很好的结果。该方法实际上可归入"矿床模拟估计法"中,其主要原理是:通过对已知对象的研究,阐明控矿因素(地质变量)与矿产资源量之间的关系,建立一定矿床类型的矿产储量与地质条件之间的定量关系(定量预测模型)。将其移植到地质条件类似的预测区应用时,只要预测区上获得预测模型中相同的地质变量及其相同的数据类型值,代入模型,就可估算预测区内的矿产资源量。预测结果,在松潘地区,"东北寨式"金矿可望增长的334₁资源量约为81吨,334₂资源量约65.9吨,为下步在该区部署地质工作提供了依据。

Abstract:

The forecast prospects of the 334 mineral resources in the "Dongbeizhai-type" gold deposits in the Songpan region, Sichuan have been delineated in this study with the aid of the favorable factor correlation method on the basis of the metallogenic conditions, geochemical anomalies and mineralization models for the "Dongbeizhai-type" gold deposits. The method may also be involved in the "ore deposit modelling estimation method". The principles may be generalized as follows. Firstly, the quantitative relationship (quantitative predictive model) between mineral resource reserves and geological conditions in one known deposit may be constructed on the basis of the approach to the relationship between the ore-controlling factors (or geological variables) and mineral resources in the given areas. When the geological variables and relevant data obtained from the predicted areas where the geological conditions are similar to those in the predictive model are introduced into the above-mentioned model, we-can estimate the mineral resources in the predicted areas. According to the model, the additional 334-1 and 334-2 mineral resources in the Songpan region may amount to 81 tons and 65.9 tons, respectively.