【摘要】 东天山地处塔里木板块北部边缘,地质构造背景十分复杂,它们在构造演化特征、岩浆活动、地球化学环境以及地层和断裂构造的分布等诸方面均有较大的差异,因此有必要对其进行地球化学分区,以此为基础才能正确地识别区内的地球化学找矿异常信息和成矿元素之间的关系,并对其进行科学有效的评价。笔者将研究区划分为4个地球化学区,即大南湖岛弧区、小热泉子弧间盆地区、康古尔韧性剪切变形带区和雅满苏弧后盆地区,分析了它们的特点,为进行地球化学背景值和异常下限的确定,以及综合成矿预测奠定了扎实的基础。更多还原

【Abstract】 Lying in the north margin of Talimu plate,the East Tianshan Mountain has very complicated tectonic background.As there exist remarkable differences in tectonic evolution,magmatic activity,geochemical environment,strata and structural distribution in different parts of the area,geochemical division of the area into subareas should be performed.Four geochemical subareas were distinguished in the study area,i.e.,Dananhu islend arc,Xiaorequanzi interarc basin,Kangguer ductile shear deformation belt,and Yamansu back-arc basin.Distribution of Cu,Au high values shows that their ore-forming processes and enrichment are rather complex.The study of these problems has laid a solid foundation for the determination of geochemical backgrounds and thresholds as well as the integrated ore prognosis.更多还原