西藏拉果错地区蛇绿岩带地球化学特征及找矿潜力分析

发布时间：2018-04-11 21:47

本文选题：水系沉积物 + 土壤　；参考：《成都理工大学》2015年硕士论文

【摘要】：本文在系统收集并分析前人地质资料与成果的基础上,通过1:50000的水系沉积物测量工作和1:10000的土壤测量工作,从水系沉积物和土壤地球化学特征入手,探讨了元素分布、分配特征,研究了元素的组合、单元素异常及综合异常分布特征,并结合地质背景进行了异常解释推断,对区域成矿潜力进行了预测。通过1:50000水系沉积物测量共圈定以Au为主的6处异常,其中Hs-乙-1、Hs-乙-2综合异常元素组合套合较好,异常浓度分带较明显,找矿潜力较大。通过1:10000土壤测量共圈定单元素异常194处,其中Au元素42处、Ag元素18处、Cr元素28处、Cu元素21处、Fe元素10处、Mn元素12处、Ni元素29处、Sb元素10处、Zn元素24处;元素组合异常50处,其中Au、Ag、Sb、Cu、Zn元素组12处,Cr、Ni元素组31处,Fe、Mn元素组7处;元素综合异常33处,其中乙类异常5处,丙类异常19处,丁类异常9处。在综合研究的基础上,共圈定2个找矿靶区。通过1:50000水系沉积物测量工作和1:10000土壤测量工作,本人认为该区主要成矿元素为Au、Cu、Ni、Fe,其中Au、Cu元素的分布在中酸性侵入岩中,与构造断裂有较大的关系,Ni、Fe元素主要要分布在拉果错蛇绿岩带中的超基性岩中,与构造有一定的关系。在上述研究的基础上,分析了成矿潜力,划分了成矿远景区,圈定了找矿靶区,为拉果错地区提供了比较丰富的地球化学资料。
[Abstract]:Based on the systematic collection and analysis of previous geological data and results, this paper discusses the distribution of elements from the geochemical characteristics of water system sediment and soil through the work of 1: 50000 water system sediment survey and 1: 10000 soil survey.The distribution characteristics of element combination, single element anomaly and integrated anomaly distribution are studied, and the anomaly interpretation and inference are made in combination with geological background, and the regional metallogenic potential is predicted.Six anomalies, mainly au, were delineated by 1: 50000 water system sediment survey. Among them, Hs-eth-1hs-2 complex anomaly elements combined well, the anomalous concentration zonation was obvious, and the prospecting potential was great.194 anomalous elements of common circle order were measured by 1: 10000 soil. Among them, 42 places of au element, 42 place of silver element, 18 place of Cr element, 28 place of cr element, 21 place of Cu element, 21 place of iron element, 10 place of mn element element, 29 place of Ni element element, 29 place of Sb element element, 10 place of Zn element, 50 places of element combination anomaly,Among them, there are 12 sites in the element group of Augna AgSbSbSbCU Zn, 31 in group Ni, 31 in the element group and 7 in the group of FeMN, among which there are 33 Synthetical anomalies, among which 5 are abnormal in Group B, 19 in Group C and 9 in Group D.On the basis of comprehensive study, two prospecting targets were delineated.Through 1: 50000 water system sediment survey and 1: 10 000 soil survey, I believe that the main metallogenic elements in this area are Au-CuCU Nianfen Fe, in which the Au-Cu element is distributed in intermediate-acid intrusive rocks.There is a great relationship with structural faults and the elements of NiNII Fe are mainly distributed in the ultrabasic rocks in the Lago Oro ophiolite belt, and are related to the structure to a certain extent.On the basis of the above research, the metallogenic potential is analyzed, the metallogenic area is divided and the prospecting target area is delineated, which provides abundant geochemical data for the Lago Cuo area.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P584;P612

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