| Beita mountain pasture of Xinjiang,located on the northeastern margin of the Junggar basin,It belongs to Basinmetallogenic belt and Tangbale-Kalamaili Cr-Cu-Mo-Au-Sn-W metallogenic belt,There are several large-super large gold and copper mines around this region,Just as like as Nanmingshui gold deposite?Kubusu gold deposite?Shuangquan gold deposite,Suoerkuduke copper deposite and Wulunbulake copper deposit,etc.Beita mountain pasture have a superior regional metallogenetic condition with intensive activity of magma and developed structures,where multiple deposits been discovered.Geochemistry landscape of this region belongs to the typical arid and half arid desert area,The area around Beita mountain peak is high-middle mountains with exposed bedrock and dendritic river system,Stream sediments are well developed,it's suitable for 1?50000 stream sediment survey.Through Collection of stream sediment samples,The contents of 14 kinds of low temperature and high temperature elements are analyzed.After data processing and Determination of anomaly lower limit based on GeoIPAS's comprehensive factors,Then Delineation of single element anomaly and Combinatorial anomaly as well as Comprehensive anomaly is completed,Statistical calculation of Anomalous characteristic parameters such as Abnormal strength,Contrast and NAP.Subsequently,classifying anomaly and screening out abnormality with further work significance.Developing Third grade anomaly inspection to abnormity which are choosed,Verifyinig anomaly by reconnaissance,large scale geological mapping,geochemical section profiling,geophysical profile profiling and trenching,determining the geologic body which manufactured anomaly.Finally,Combined with geological and geochemical characteristics of typical deposits,Developing comparative analysis and comprehensive evaluation to delineate tracts,Summarize metallogenic regularity and prospecting direction of this reigon.From this study,following achievements have been obtained:1.variation coefficient of Au Cr Ni lies between 0.7 and 1,those elements distribution is extremely uneven,have a trend to forming local anomaly;As Sb Bi are weakly uneven elements;Cu?Pb?Zn?Ag?Co?W?Sn?Mo are uniform distribution elements;Except for the As Bi,,other elements content isless than clark values of crust;compared with China background value and Xinjiang background value of stream sediment,As Cu Co are relative enrichment elements than Zn?Ni except for others;The content of As Cu Ni in working district is higher than which in Junggar basin while Au Cr Co are slightly higher than Junggar basin's content.Analysi on characteristics above,there is a trend that some kind of elements such as Au As Cu Cr Ni content in working district will be enriching.2.Through cluster analysis and factor analysis,combined with the actual geological background of the working area,the 14 elements are divided into 4 groups,that is,the first group is Cu,Ag,Au,As,Sb,Bi,and it's correlation coefficient is 0.48,This group is the main middle and low temperature elements,which contain the main metallogenic elements in this area,indicate that the mineralization of Au and Cu is mainly affected by the medium low temperature hydrothermal solution.Pb and Sn were second groups.The correlation coefficient between them and the first group was 0.17,and the correlation with the first element was poor.The third group is W and Mo,the correlation coefficient is 0.28,W and Mo are high temperature elements,which are mainly related to late Carboniferous and Early Permian mixed source intrusive rocks.The fourth group is Zn,Cr,Ni and Co,and the correlation coefficient is 0.27.The elements of this group are mainly iron group elements,which are closely related to the exposed intermediate basic volcanic rocks in the working area.3.The whole region has delineated 29 comprehensive anomalies,which are divided into 2 of Nail 1 types,2 of Nail 2 types,1 of Ethyl 1 types,6 of Ethyl 2 types,5 of Ethyl 3 types,8 of Hepatitis C 1 types,4 of Hepatitis C 2 types,1 of Hepatitis C 3 types.5 metallogenic distant scenic spots have been delineated.18 comprehensive anomalies with no mineral rights have been selected,and 6 places have been found through abnormal verification and found in all kinds of ore(chemical)points,including 3 gold mineralization points and 3 copper points,which have obtained more remarkable ore finding results.It is proved that the comprehensive anomaly inference interpretation is reliable and provided the basis for the next step of the North Tashan area is to find ore prospecting work.4.The ore controlling factors and prospecting criteria for gold and copper are summarized,and the prospecting direction in the working area is indicated. |
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