摘要
根据贵州省新一轮区域化探扫面工作所采集的45965件表生沉积物（含部分土壤样）组合样品中39种元素或氧化物定量分析结果为基础，初步探讨全省约17.6万km2范围内表生沉积物地球化学背景含量分布特征。经与中国水系沉积物中39种元素背景值相对比，总结了全省表生沉积物中具有：①亲铜（硫）性成矿元素呈强聚集的高地球化学背景占主导，②亲基性、相容元素呈次强聚集的较高地球化学背景为主体；③亲石（氧）性。不相容元素接近全国水系沉积物地球化学背景为基础；④碱、碱土金属元素呈强烈溶失、贫化趋势的低地球化学背景为特色的地球化学背景分布特点。贵州省表生沉积物地球化学背景，对于省内基础地质地球化学、地质找矿与预测、环境与人类健康等方面的研究，具有重要的参考意义。
In comparison with corresponding elements of drainage sediments in China, thequantitative analyses, for 39 elements and for certain oxides, of 45, 965 composite samples ofsupergene sediments taken from a recent regional geochemical survey over an area of 176, 000 km2 inGuizhou reveal distinct patterns of four groups of geochemical backgrounds: (1) philo-Cu-S ore-formingelements are characterized by a strongly high background; (2) basicophile elements or compatibleelements, relatively high; (3) lithophile elements or incompatible elements in background are roughlyclose to those contained in drainage sediments throughout the country; and (4) alkali and alkali earthmetal clements tend to depletion due to leaching. This result provides an additional base for researchon geology, geochemistry, mineral exploration and rapid determination of targets, environment andhealth, and so on.
出处
《贵州地质》
1998年第2期149-156,共8页
Guizhou Geology
