依据化探成果对东昆仑地质背景的讨论

在东昆仑地区 6 0 0 0 0多km2 的地域内 ,按照 4km2 的采样单元 ,共采集了 15 0 0 0多件水系沉积物样品。按照 16km2 的网格加工成 4 0 0 0多件组合样后 ,定量分析了 4 0种微量元素的含量。在对这些数据进行数学处理的基础上 ,利用斜交因子的分析结果 ,讨论了东昆仑地区的区域地层、断裂构造和中酸性岩浆岩的特征。根据区域地球化学成果 ,进一步明确了昆中、昆南断裂对本区地层和侵入岩分布的控制作用。基于元素区域地球化学背景的对比 ,提出了昆中断裂应向东延伸的证据 ,并指出了东大滩、布青山两个地区经历了相似的地质 地球化学作用

A DISCUSSION ON GEOLOGICAL BACKGROUND OF THE EAST KUNLUN AREA BY GEOCHEMICAL EXPLORATION DATA

More than 15,000 stream sediment samples were collected in the East Kunlun area of more than 60,000 km 2, as a sampling cell of 4 km 2,40 trace elements or oxides were analyzed from more than 4,000 combined samples which consisted of the samples within a cell of 16 km 2. On the basis of some data processing, several problems about the character of regional strata, the deep faults and magmatite were discussed by means of the results of factor analysis of the geochemical exploration data. From the discussion, it's further clear that the Middle Kunlun Fracture and the South Kunlun Fracture control the distribution of the strata and the intrusive rocks in this area. Based on the analysis of regional geochemical background, it's safely concluded that the Middle Kunlun Fracture should extend to the east longer; and there is the similar geological and geochemical process between the Dongdatan area and the Buqingshan area.