东昆仑大格勒地区碱性岩-碳酸岩型铌矿勘查进展及找矿前景

Exploration Progress and Prospecting Prospect of Alkaline Rock-carbonate-type Niobium Deposit in the Dagele Area,East Kunlun

铌广泛应用在冶金工业、原子能工业、航空航天工业、军事工业、电子工业、超导材料及医疗仪器等方面,是全球高度关注的关键矿产。碱性岩-碳酸岩型矿床赋存了世界上大部分的铌资源,而我国铌资源禀赋差,对外依存度大于90%。2021年青海省地质调查院在东昆仑大格勒地区发现了碱性岩-碳酸岩型铌矿,通过三年的勘查工作,圈定5条铌矿体,矿体延伸长160~1280 m,控制最大斜深800 m,矿体厚度4.3~115.7 m,Nb_(2)O_(5)平均品位0.092%~0.156%,伴生P_(2)O_(5)平均品位3.8%~5.6%。通过资源量估算,Nb_(2)O_(5)推断资源量超过10万吨,已达大型矿床规模。目前铌矿体在走向和倾向上延伸稳定,显示出良好的找矿前景。

Niobium is widely used in the metallurgical industry,atomic energy industry,aerospace industry,military industry,electronics industry,superconducting materials,and medical instruments,and is a key mineral of great concern worldwide.Alkaline rock-carbonate-type deposits account for most of the world’s niobium resources,whereas China’s niobium resources are poor and its dependence on foreign countries is greater than 90%.In 2021,the Qinghai Provincial Geological Survey Institute discovered an alkaline rock-carbonate-type niobium deposit in the Dagelogou area,East Kunlun.Through three years of exploration,five niobium ore bodies were delineated,with extension lengths of 160 to 1280 m,a maximum inclination depth of 800m,thicknesses of 4.3 m to 115.7 m,and grades of 0.092%to 0.156%for Nb_(2)O_(5) and 3.8%to 5.6%for P_(2)O_(5).Based on resource estimation,the inferred resource of Nb_(2)O_(5) is more than 100,000 tons,which has reached the scale of a large-scale deposit.At present,the niobium ore body extends steadily in the trend and inclination,showing good prospecting prospects.