新疆比勒提地区地质地球化学特征及资源评价

发布时间：2018-05-18 09:58

本文选题：西南天山 + 比勒提地区　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：西南天山是我国重要的金和有色金属矿产远景区。比勒提位于塔里木盆地西北缘,南天山造山带南部,为塔里木盆地与西南天山的接触部位,受北部的阿合奇断裂带和南部的柯坪逆冲推覆构造共同影响,区内以古生代地层和新生代地层为主,中生代地层不发育。由于自然地理及气候、交通等条件极其恶劣,地质及物化探工作程度很低,大比例尺的地球化学资料还是一项空白。因此本次工作以区域地质矿产调查项目为依托,开展比勒提地区水系沉积物测量。通过对比勒提地区开展1:5万区域地质矿产调查,了解了该区地质情况和成矿背景。开展水系沉积物测量,分析19种元素,通过统计分析,查明了区域地球化学特征,丰富了比勒提地区大比例尺的地质、化探基础资料。研究区相对与区域背景值,除Cu元素与区域背景值相近之外,其余均处于高背景,表明元素在该地区浓集,为成矿提供了有利条件。致矿序列前端(Zx40)的元素主要有:Au、Hg、As、Pb、Mo、Ba、Ag、Sb,其中Au元素的致矿系数最大,达到196.08。研究确定该区主成矿元素为Au、Ag、Cu、Pb,低温远程元素组合As、Sb、Hg为主成矿元素的伴生元素,Mo为高温成矿伴生元素。比勒提地区19种元素共圈出单元素异常259处,综合异常5处,圈定了3处找矿远景区,对喀拉铁克金铜铅锌成矿远景区采用地球化学定量预测方法(面金属量方法)进行了资源评价,潜在Au资源量达到309.77kg,潜在Cu资源量达到17844t。找矿潜力较大。
[Abstract]:Southwest Tianshan is an important gold and non-ferrous mineral area in China. Biletti is located on the northwest margin of the Tarim Basin and south of the South Tianshan orogenic belt, which is the contact site between the Tarim Basin and the southwest Tianshan Mountains. It is influenced by the northern Aceh fault zone and the Keping thrust nappe structure in the south. Paleozoic and Cenozoic strata are dominant in the area, Mesozoic strata are not developed. Because of the extremely bad conditions of natural geography and climate, traffic and so on, the geological and geophysical prospecting work is very low, and the geochemical data on large scale are still blank. Therefore, based on the regional geological and mineral survey project, the water system sediment survey in Bileti area is carried out. The geological situation and metallogenic background of the area are understood by a regional geological and mineral survey of 1: 50 000 in the area of Perete. The authors carried out river system sediment survey and analyzed 19 elements. Through statistical analysis the regional geochemical characteristics were found and the geological and geochemical data of large scale in Bileti area were enriched. The relative and regional background values of the study area, except Cu element and regional background value, are all in high background, indicating that the elements are concentrated in this area, which provides favorable conditions for mineralization. The main elements of the ore-forming sequence are: 1 / Au-HgGN AsPbPbMoB BaAg-AgSb, in which au elements have the largest mineralization coefficient (196.08), and the ore-forming coefficient of au is 196.08 in the first part of the ore-forming sequence. The main ore-forming elements in this area are Au-Ag-Cu-Pb, and the associated elements of As-SbHg-Hg-dominated metallogenic elements at low temperature are associated with high temperature ore-forming elements. There are 259 single element anomalies and 5 synthetic anomalies in 19 elements in Bileti area, and 3 ore prospecting scenic spots have been delineated. The geochemical quantitative prediction method (surface metal quantity method) was used to evaluate the potential au resource and potential Cu resource of KaraTekejin copper-lead-zinc metallogenic area. The potential au resource reached 309.77 kg and the potential Cu resource reached 17844 t. The prospecting potential is great.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.2;P632

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