【作者】 张丽红；

【导师】 岑况；

【作者基本信息】 中国地质大学（北京） ， 地球化学， 2007， 硕士

【摘要】 高寒荒漠是我国西北地区特有的地貌景观类型，主要分布在新疆、甘肃、青海和内蒙古地区，分布面积达60多万平方公里，约占我国国土面积的1／15。这类景观地区气候干燥，季风强烈，以物理风化为主，具有稳定地块的地貌特征，是未来我国铜、金、银、铅、锌等重要矿产资源基地本文以西南天山戈壁荒漠地区为代表，开展了系统的技术方法研究，选择位于本区已知矿区附近进行不同方法的地球化学方法测量试验研究，分析区内不同介质中各粒级中主要成矿元素及伴生元素Au、As、Ag等元素含量变化和分布特征，提出了在该区开展地球化学找矿方法测量的最佳采样深度、采样介质、采样粒级和较适宜的采样密度。针对戈壁荒漠区气候干燥，蒸发量大于降雨量，植被、水系不发育，风成沙干扰等特点，总结试验方法，认为采集水系沉积物时，样品采样深度一般为0—20cm近地表附近的物质为最佳；在不同比例尺面积测量中，本次工作采用不同介质的技术方法手段分别作了测量试验：认为1:20万面积测量，样品采集介质应为水系沉积物为最佳；1:5万和1:1万面积测量，样品采集介质应为岩石碎屑为最佳。本次工作各种试验方法均取得了较满意的地质效果。并通过已知矿区的对比试验验证，证明该方法对于该类景观区中出露矿和浅掩埋矿体是有效的。更多还原

【Abstract】 High-cold hungriness landscape is the special landscape of physiognomy, which were mainly distributed in Xinjiang, Gansu, Qinghai and Neimenggu province. The proportion of this landscape exceeds 60 square kilometers and comes up to the 1/15 of the propotion of our soil. The climate of this area is dry, the monsoon is strong ,and the physical weathering is primary. The characteristic is similar to the geomorphy of stable block, and this area is becaming to the main producing area of mineral resources in the future, such as gold、silver、copper leadx zinc etc.This paper chooses the high-cold hungriness landscape as a subject investigated, and outspread the geochemistry prospecting method and techniques by the numbers. Our experiment plot lies in southwestern of Tianshan Mountain, Xinjiang area. A suite of geochemical survey methods including sampling distribution, sampling density, sampling grade, which are appropriate for geochemical survey in Gobi & hungriness, have been proposed through kinds of method testing in cross section and surface area in western of Tianshan Mountain area.According to the characteristics of this area, where the climate is dry, the evaporating capacity exceeds rainfall, the nondevelopment of the plant cover and the river system, and the more Aeolian sand, this test work was mainly aimed to generalize a suite of geochemical survey methods, and the test results indicats that the samples which were lie in ground surface (about 0～20 centimeter) is better while collecting sedimentary of river system. Meanwhile, the measure of several comparing rule have been proceeded to confirm sample medium. The results indicats that the detritus could clearly circle mineralizing anomalies with complete element association.In a word, we obtained good geological result of this paper with all sorts of methods we adopted to conduct the experiment. Through contrasting to the known orebody, the testing method is effective to disclose the unknown orebody of the area in high-cold hungriness landscape.更多还原