| 汪东波,张本仁,马振东.鄂西北地区武当山群地球化学及金银含矿性评价[J].地质找矿论丛,1991,(1):14-27 |
| 鄂西北地区武当山群地球化学及金银含矿性评价 |
| THE GEOCHEMISTRY AND APPRAISAL OF GOLD—SILVER BEARING ABILITY OF WUDANGSHAN GROUP IN HUBEI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1991.1. 002 |
| 中文关键词: 鄂西北 武当山群 地球化学 金银含矿性评价 金银矿化 |
| 英文关键词: |
| 基金项目: |
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| 摘要点击次数: 1053 |
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| 中文摘要: |
| 本文系统地介绍了武当山群的层序、分布、时代、岩石组合及常、微量元素地球化学特征,阐述了地层金银含矿性评价的地球化学准则,进行了武当山群金银含矿性的评价。研究表明武当山群挡鱼河组上亚组及杨坪组为有利金银矿化产出的地层,它们控制着区内的金银矿化。 |
| 英文摘要: |
| The distribution, sequence, geological age, petrological combination and geochemical characteristics of major and trace elements of Wudangshan Group are discussed. And its gold (silver)ore bearing ability is systematically appraised, and the geochemical apprasial methods also has been explained in this paper. Wudangshan Group is chiefly composed of meta-basic volcanic rock,meta-feisic volcanic rock and meta-sedimentary rock. The meta-basic volcanic rock is comparatively rich in Fe2O3, Na2O, Th, Y,and poor in K2O, FeO, TiO2, Cr, Co, Ni, V, P; whereas, the meta-felsic volcanic rock is comparatively rich in Fe2O3, Th, Y, Ti, V, Mn, As, Sb, Bi, and poor in CaO,P2O5,Sr,Ba,La,Zr,Cu,Pb,Zn,Be,Nb,Rb. The meta-sedimentary rock of Yangping Formation of Wudangshan Group is comparatively rich in Ba,Th,Y,Ti,V,Mn,Cu,As,Sb,and poor in Sr,La,Pb,Zn,Be,Nb,Rb,Sn, Zr,and has similar characteristics to graywack in active coutinental margin. Factor combination of chemical elements of various formations of Wudangshan Group are corresponding to magrnatic evolution trend,isomorphism and alteration. Because of higher abundance of gold and silver,lower Xg/Xa, poly-peak skew distribution and logrithm normal or logarithm normal skew distribbution of silver, higher ratio of accessible gold and silver, forming special element combination(including gold and ssilver)being similar to mineralizing elements combination in the area. Yangping Formation and Upper Dangyehe Formation of Wudangshan Group can be regarded as favourable strata to gold and silver mineralizationin the area. In addition,the metallogenetic model of gold and silver of Wudangshan Group in the area also has been given in this paper. |
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