福建沿海地区表层土壤矿物分布特征及地质和环境意义

对福建沿海地区表层土壤矿物组分、含量、组合以及分布特征进行了分析研究。结果表明,不同地质背景形成的土壤其重矿物组成具有复杂性、一致性和差异性;不同的土壤类型其矿物组合可以较好地反映土壤与成土母岩的内在成因关系;不同沉积环境下形成的土壤矿物组成受外力影响具有一定的分选性;平原区土壤中汞、砷等元素的区域性高异常则与土壤中辰砂、雄黄矿物存在有关。

Distribution of Top-layer Soil Minerals in the Coastal Area of Fujian Province and Their Geological and Environmental Significance

The component, content, composition and distribution of the minerals in top-layer soils in the coastal area of Fujian Province were analyzed and studied. The results indicate that heavy minerals in the soils formed under different geological background have complexity, consistency and diversity. The mineral assemblages from different soil types can well reflect the inherent relationship of the origin between soils and their mother rocks. Influenced by external forces, the mineral assemblages in the soils formed under different sedimentary environment have certain mineral combination diversity. The regional high-anomaly for some elements such as mercury and arsenic can be related to the existence of cinnabar and realgar minerals in the soils from the plain districts.