There are abundant weathered porphyritic granite type potassium feldspar deposits in northern Hubei Province,but there is a lack of special geological exploration specifications and clear industrial indicators,which brings inconven-ience to the exploration,development and management of such potassium feldspar deposits.Taking the Shangdananchong porphyritic granite deposit in the north of Qijjianfeng rock mass as an example,through the systematic arrangement of small shaft and drilling engineering,the chemical analysis samples and ore-bearing rate samples of potassium feldspar were collected to explore the industrial indicators of weathered porphyritic granite type potassium feldspar deposits.Based on the statistical data of the samples of the deposit and the actual situation of mining in the area,the industrial indicators of the deposit is drawn up,that is,the useful minerals of the ore:potassium feldspar phenocrysts with particle size ≥1 cm;the chemical composition of ore useful minerals:K2O+Na2O content ≥11.0％,K2O/Na2O ratio ≥2.0,Fe2O3 content≤2.5％;the ore-bearing rate of useful minerals in ore:single project average ≥25％.The research results can provide reference for the exploration and development of weathered porphyritic granite type potassium feldspar deposits in north-ern Hubei and other regions.It is suggested that local standards for such deposits should be established in time to promote the standardized management of potassium feldspar deposits.
potassium feldsparweathered porphyritic granite typeindustrial indicatorsexploration standard
维普
万方数据
