| The skarn type Pb-Zn deposit of Tibet Mengyaa is located in Jiani county of Naqu district,is a an important Pb-Zn deposit in the eastern Gangdisi mineralization belt in Tibet.In this paper,the system relies on field sampling and rigorous indoor work,and X-ray diffraction samples were tested by semi-quantitative analysis,at the same time aided by microscopic identification,alteration distribution of mine studied.Identify the types of Alteration mine,Alteration intensity,Alteration range;and Alteration of their combined,preparation of Alteration intensity profile,carved out of the spatial distribution of the intensity of Alteration in the mine,and what features it has.Based on X-ray diffraction to obtain the relative mineral content percentage,try to divide the rock type.During this process,diagenetic and the spatial distribution of alteration minerals,Finally Alteration related issues were discussed.By Alteration minerals and their combined spatial distribution case,To study the distribution and the degree of association eclipsing orebody,Determining the scope of the relationship between hydrothermal activity and ore,understanding of the law of hydrothermal alteration.Obtained following understanding:(1)1 Number,Zone No.2 chlorite and sericite Alteration.To some extent reflects the multi-stage superimposed alteration influence,Including high temperature and low temperature Alteration Alteration two effects,reflecting the mine occurred more hydrothermal,effect of non-uniform effects.(2)District No.1,No.2 zone high carbonation degree of overlap with the ore body,Closely related to the distribution of the ore body.(3)Close No.3 Distribution and area dolomite ore,The distribution of the ore body highly relevant,as a future focus areas to carry out reconnaissance.(4)Mining area with a formation lithology varying in size and showed a cloud-like,so the mine stratigraphic lithology unstable. |
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