Boron(B)is a new strategic mineral widely used in modern high-tech industries.In recent years the exploration of boron mineral resource has received increasing attention as the demand for boron contineous to rise.The overall distribution characteristics of boron in China is very important for boron prospecting.Based on analyses of the 3380 deep soil samples collected by the China Geochemical Baseline(CGB)project,this paper reveals the geochemical and anomaly distribution characteristics of boron in China.We found that the average boron concentration in deep sediments/alluvial soil of China was 46.4 mg/kg,showing a trend of high in the south and low in the north,with contiguous distribution across five geochemical zones:northeastern China and eastern Inner Mongolia(Ⅰ);northwestern China(Ⅱ);northern China(Ⅲ);Qinghai-Tibet(Ⅳ)and southern China(Ⅴ).Taking 70.9 and 52.4 μg/g(cumulative frequency 85％)as the lower anomaly thresholds in the south and the north,respectively,we identified a total of 37 geochemical anomalies,which were classified into ten geochemical provinces and nine individual anomalies.According to the spatial distribution of boron anomalies,combined with the geological background and distribution of boron deposits,we further delineated nine metallogenic prospective areas.We suggest that more efforts should be made to explore boron-rich salt lake deposits,and that hard rock(marine sedimentary)boron deposits should be the next exploration target.
关键词
硼/中国地球化学基准/找矿远景区/深层土壤/地球化学异常
Key words
boron/China Geochemical Baseline/potential mineral resources area/deep soil/geochemical anomalies
维普
万方数据