辽宁宽甸红石地区硼矿化物化探综合信息分析

COMPREHENSIVE ANALYSIS OF GEOPHYSICAL AND GEOCHEMICAL INFORMATION FOR THE HONGSHI BORON MINERALIZATION IN LIAONING PROVINCE

研究区存在古元古界辽河群里尔峪组硼富集层.为确定赋存硼矿化地层层位构造蚀变带分布情况,利用地球化学与地球物理测量方法,在已知见硼矿钻孔构造蚀变带进行测量,总结分析硼矿化地球化学与地球物理特征.结合成矿地质条件,建立本区硼矿化地质物化探找矿模式,认为辽河群里尔峪组复背斜和复向斜与本区硼成矿有关.硼矿化分布区物化探特征为:地面磁力测量磁场值呈偏高磁场值分布;中梯激电测量为低视电阻率与偏高视幅频率;电测深反演电阻率反映为低阻线性构造带与偏高激电异常带,在矿化较强烈部位电阻率相对偏低;地球化学异常以硼为主,硼化探异常有明显的浓集中心,同时伴生铅、锌、银复合地球化学异常.

The boron enriched layers of Paleoproterozoic Liaohe group exist in the study area. In order to determine the distribution of boron mineralization, geochemical and geophysical survey is carried out in the known structural alteration belts. With analysis of the geochemical and geophysical characteristics of boron mineralization, combined with the metallogenic geological conditions, the geological and geophysical-geochemical prospecting model for this area is established. It is believed that the anticlinorium and synclinorium of Lieryu Formation, Liaohe group are related to the boron mineralization. The physic-chemical characteristics of boron mineralization in the area are as follows： The ground magnetic field values are distributed as high magnetic field. Gradient IP survey shows low resistivity and high amplitude frequency. Electrical sounding inversion resistivity indicates low-resistance linear structural belt and high IP anomalous zone. The resistance is relatively low where the mineralization is strong. The geochemical anomaly is dominated by boron, with an obvious concentration center, associated with lead, zinc and silver comoosite geochemical anomalies.