ISSN 1005-2518
CN 62-1112/TF
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30 June 2000, Volume 8 Issue 3
    

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  • WANG Guang-Ning
    J4. 2000, 8(3): 24-27.
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  • FENG Shou-Zhong
    J4. 2000, 8(3): 29-35.
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    Xicha,Ginchang Gou Gold ore deposit are belong to strata-bound break-alterationtapy,It's metallogenic times are in the early Yanshanian to lndo-chinese epoch,The informa-tion about the element abundance and 1tls evolution in stratiform indieate that the etallo-genic source materiab of the deposit have double features.some of them came from strtiform and perhaps parts from magmatic rocks.Stable isotopic data as follow :Xicha gold are deposit:δ34S=1.9‰ ~7.4‰ ;Jin Chang Gou:δ34S=3.2‰ ~5.1‰.It indicate this two ore deposit with similar sulphur isotopic component have the similar sulphur source.δ34OH2O=5.3‰ ~ 66.4‰ ;δ34S=一6.I‰.Fluid inclusions datas indicate that metallogenk fluid aremainly chlorinated water.metallogenic tempeture concentrate on the 142~ 290℃ .From this,we infer the ore—bearing solutions probale the mixture water of magmatic water and atmospheric precipitution.The ore-beafingsolutions possible came from the stratiform.

  • ZHOU Si-Fu, GAO Zhen-Min
    J4. 2000, 8(3): 36-42.
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    There exists many refractory gold deposites occuring in the clastic carbonaceous rocks richeniag organic compounds in sea facies、Gold exist as micrograaual inclusion in the loading-gold minerals:pyrites and carbons.Gold caa。t be leached by traditional leaching method with cyanides,and the leaching ratio is about 10 、Eliminating the inclusion of laoding-gold sulfides is a powerful measure to make gold dissolve,sodium hypochlorite is a oxidant adapting to oxidize and decompose sulfides to liminate inclusions to leach gold in carbonaceous pulp.The oxidation of pyrites is influenced by the concentrations of NaClO and NaCl,solution-solid ratio and pH.After the sulfides is decomposed by sodium hypochlorite,gold is exposed to be leach by sodium hypochlorite,the leaching ratio is up to 85%.

  • CHEN Yong-Feng
    J4. 2000, 8(3): 43-46.
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    This paper describes briefly the excecutive environment of AutoCAD .basic functions and characteristics-It also introduces the main functions of some CAD software for mining made by author.