东昆仑东段都兰地区地球化学特征及其成矿意义 ——基于大比例尺微沟系（土壤）测量工作

在提取东昆仑东段都兰地区11个1:2.5万地球化学测量项目16种共同测试元素原始数据的基础上，进行了数理指标及多元统计分析，以期从整体角度为该区寻找原生矿床及后期研究提供表生地球化学依据。分析显示：Au元素以强丰度背景拟合值、高剔除比率、高离散分布特征、强叠加值为特征，为区内主要的成矿元素，其次As、Sb、Cu、Ni、Cr、Co、Ag、Pb、Zn等元素丰度背景拟合值与剔除比率高，高强数据多，可作为第二类成矿元素；高温热液元素为背景的稀有稀土元素组合，浓集系数、丰度背景拟合值均表现为富集曲线，但变异系数与叠加作用较弱，可作为第三类成矿元素。通过多元统计分析，将全区元素划分为Ag-Zn-Pb、Cr-Co-Ni-Cu、Y-La-Sn、As-Mo-Sb、Au、W-Bi等六类，并且由各元素的因子得分极值绘制了地球化学分区图，从表生地球化学角度阐明了有利的成矿区段。

Geochemical characteristics and metallogenic significance of the Dulan area in the eastern section of the East Kunlun Mountains derived from large-scale micro channel system (soil) measurement

This work tests 16 common elements from 11 1:25000 geochemical surveys in the eastern section of the East Kunlun Mountains. Then mathematical index and multivariate statistical analysis are carried out to provide the epigenetic geochemical evidence for the exploration of primary deposits and subsequent research from the overall perspective. The analysis shows that Au element is the main ore-forming element in the area, which is characterized by a strong abundance background fitting value, high rejection ratio, high discrete distribution and strong superposition value. Elements As, Sb, Cu, Ni, Cr, Co, Ag, Pb, and Zn also have high abundance background fitting values and high rejection ratios, with dominant high-strength data, which can be used as the second type of ore-forming elements. The rare earth element combination, under the background of high-temperature hydrothermal elements, is featured by enrichment curves of the concentration coefficient and abundance background fitting value, but its coefficient of variation and superposition are weak, which can be used as the third type of ore-forming elements; Based on multivariate statistical analysis, the elements in the whole area are divided into six categories: Ag-Zn-Pb, Cr-Co-Ni-Cu, Y-La-Sn, As-Mo-Sb, Au, and W-Bi. A geochemical zoning map is drawn by the extreme values of factor scores of each element, and the favorable metallogenic regions are clarified from the perspective of epigenetic geochemistry.