中国土壤硼地球化学异常特征与找矿远景区预测  

Characteristics of boron geochemical anomalies and prediction of boron resource potential in China

作　　者：柳青青[1,2] 王学求[1,2] 张必敏[1,2] 周建[1,2] 王玮[1,2] 刘汉粮[1,2] 刘东盛[1,2] 周怡宁 常婵 LIU Qingqing;WANG Xueqiu;ZHANG Bimin;ZHOU Jian;WANG Wei;LIU Hanliang;LIU Dongsheng;ZHOU Yining;CHANG Chan(Key Laboratory of Geochemical Exploration of Ministry of Natural Resources,Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China;UNESCO International Centre on Global-scale Geochemistry,Langfang 065000,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所自然资源部地球化学探测重点实验室,河北廊坊065000 [2]联合国教科文组织全球尺度地球化学国际研究中心,河北廊坊065000

出　　处：《地学前缘》2025年第1期50-60,共11页Earth Science Frontiers

基　　金：国家自然科学基金地质联合基金项目(U2244219);中国地质调查局地质调查项目(DD20221807)。

摘　　要：硼是一种新兴战略矿产,在现代高新技术产业中应用广泛。近年来,硼的需求持续上升,硼矿资源勘查也日益受到重视。本文依托中国地球化学基准值计划所采集的3380件汇水域深层土壤数据,提供了全国B元素地球化学分布和异常特征。全国汇水域土壤深层样品B平均含量为46.4μg/g,B整体上具有南高北低、连片分布的特点,可划分为5个地球化学分区,分别为东北与内蒙古东部地区(Ⅰ)、西北部地区(Ⅱ)、华北地区(Ⅲ)、青藏地区(Ⅳ)和南方地区(Ⅴ)。以B含量70.9和52.4μg/g(累频85%)分别作为南北方异常下限,共圈定出37个B地球化学异常,在全国圈定10个地球化学省和9个小规模异常。根据B异常空间分布,结合地质背景和硼矿床分布,进一步划分出9个成矿远景区,建议加大盐湖型硼矿的找矿勘查力度,并将硬岩(海相沉积)型硼矿作为下一步勘查目标。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 52.4μg/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 

分 类 号：P595[天文地球—地球化学] P596[天文地球—地质学]