GEOCHEMICAL CHARACTER OF DISPERSED ELEMENT IN SPHALERITE FROM FULE Pb-Zn POLYMETAL DEPOSIT,YUNNAN PROVINCE
GEOCHEMICAL CHARACTER OF DISPERSED ELEMENT IN SPHALERITE FROM FULE Pb-Zn POLYMETAL DEPOSIT,YUNNAN PROVINCE
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发表时间：
2006
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通讯作者：
Si Rong-jun;Guo Xue‐xiang
中科院分区：
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作者：
Si Rong-jun;Guo Xue‐xiang
分散元素Cd、Se、Ge、Ga在川滇桂多金属成矿区东南部富乐铅锌矿床中具有重要的经济价值。分散元素主要赋存于闪锌矿中，平均含量w(Cd)16 183×10-6，w(Se)163×10-6，w(Ge)135×10-6，w(Ga)86×10-6Cd主要赋存于深色闪锌矿中，Ge、Ga在不同颜色的闪锌矿中含量变化不大。Cd、Ge、Se主要以异构体形式存在于闪锌矿晶格中，Cd、Ge占据锌的位置，Se占据S的位置。Ga通常以微吸附形式吸附在晶格缺陷中，其他进入闪锌矿晶格的Cd、Ge和Se与锌呈负相关。分散元素的地球化学性质表明，该矿床属沉积改造型矿床。
The dispersed elements have great economic value,and are widely applied to high and new-technology industries.However it is difficult for them to accumulate and form ore deposits because of their low assay and dispersivity in the crust.Four dispersed elements Cd,Se,Ge and Ga have economic value in Fule PbZn deposit which is localed in the southeast part of Sichan-Yunnan-Guihzou polymetallogenic district.The dispersed elements mainly occurred in sphalerites with average content of w(Cd) 16 183×10~(-6),w(Se) 163×10~(-6),w(Ge) 135×10~(-6) and w(Ga) 86×10~(-6) resectively,and with the content of Cd being the highest in China.The colour of sphalerite can be divided into dark-brown,red-brown and yellow-brown.Cd occurs mostly in dark colour sphalerite,Ge and Ga in light colour one,the content of Se does not change in different colour sphalerite.Mainly occurred as allomerism form,Cd,Ge,and Se occur in crystal lattice of sphalerite,where Cd and Ge occupy the position of Zn and Se occupies the position of S.Ga usually are adsorbed in lattice defect as microadsorption form,and the other enter sphalerite crystal lattice in place of Zn in sphalerite Cd-Zn are negative correlation,Ge-Zn are positive correlations,but Se-Zn are independent.The geochemical characters of the dispersed elements indicate that the deposit belongs to sedimentation-reformation type.