The Analysis Of Geochemical Characteristics And Ore-forming Potential Of Ophiolite Belt, Lhaguocuo Area, In Tibet

Based on the system collection of the previous geology datas and scientific research, throught 1: 50000 stream sediment survey work and 1: 10000 soil survey work, this article discussed on the element distribution, distribution characteristics, studied combinations of elements, distribution characteristics of single element anomaly and integrated anomaly, combined with the geological background to explain and predicted potential of regional metallogenic by using stream sediment and soil geochemical characteristics.A total of 6 to Au-based abnormalities were delineated throught out 1: 50000 stream sediment survey, including Hs- B-1, Hs- B-2 abnormal combination of elements nested better, concentrate zoning of abnormals are obvious, prospecting potential is better. Therefore, in order to further verify the abnormal development of the situation in the study area, encrypted soil samples were take in the area of good water system abnormalities.A total of 194 single element abnormalities were circled throught out 1: 10000 soil measuring survey,which inclding A total of 194 single element abnormalities were circled throught out 1: 10000 soil measuring survey,which inclding 42 Au element abnormalities,18 Ag element abnormalities,28 Cr element abnormalities,21 Cu element abnormalities,10 Fe element abnormalities,12 Mn element abnormalities,29 Ni element abnormalities,10 Sb element abnormalities and 24 Zn element abnormalities;Abnormalities of elements combination are 50,which including 12 Au-Ag-Sb-Cu-Zn elements group,31 Cr-Ni elements group,and 7 Mn-Fe elements group;33 Synthesized abnormalities of elements are circled,which including 5 B Class abnormalities,19 C Class abnormalities,and 9 D Class abnormalities.On the basic of a comprehensive study, a total of 2 prospecting targets are circled.By using 1: 50000 stream sediment survey work and 1: 50000 soil survey work,I think that the main mineralization elements of the study area are Au, Cu, Ni, Fe, and the distribution of Au, Cu elements are mainly in acid intrusive rocks,and they have a great relationship with structural faults. Ni, Fe elements are mainly distributed in ultrabasic rocks of the Laguocuo ophiolite belt,which have a certain relationship with the structure.Based on these studies, the mineralization potential is analyzed, mineralization prospect area is divided. Mineralization targets are circled. And it is also provided a more extensive geochemical data for the Laguocuo area.