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1998 Vol.7 Issue.4,Published 1998-12-31
241 BIOGEOCHEMICAL EXPLORATION IN DAXINGANLING FOREST COVERED AREA
Quan Heng, Zhang Hong, Zhang Jiongfei, Wu Guang, Li Guangyuan, Wang Lu, Jin Chengzhu
Based on the previous study on biogeochemical exploration,combining the geology of non-ferrous and precious metallic mineralization of the area,the bark from lower trunk of betula is selected as the sampling media of biogeochemical survey. The contents of Au,Ag,Cu,Pb and Zn elements are tested The results show that:1)biogeochemical survey is more effective than soil geochemical survey;2)the bark of betula is characterized by easily picking and ashing; and 3)the biogeochemical result coincides well to the known Au-Pb-Zn mineralization alteration-alteration belts. Biogeochemical survey in this area is suitable and reliable. It is worth to be spread.
1998 Vol. 7 (4): 241-249 [Abstract] ( 24 ) [HTML 1KB] [ PDF 339KB] ( 169 )
250 ORIGIN OF ZHILINGTOU Au Ag DEPOSIT IN ZHEJIANG PROVINCE
Ji Guiqing, Shao Jun
The ore bodies in Zhilingtou Au-Ag deposit,Zhejiang Province, are chalcedonic quartz veins containing adularia and rhodonite The ores occur in circular-zonal structure and grained,metasomatic and poikiloblastic texture Wall rocks are strongly altered and with typical features of epithermal alteration Ore-forming fluid is low-salinity,approximate neutral and reduced hydrothermal The S and Pb isotopes of the Au-Ag doposit suggest that the ore forming materials are mostly from deep crust(down to upper mantle) The ore-forming hydrothermal is derived from magmatic water and meteoric water,and evolves as low temperature hydrothermal suggested by H,O and C isotopes The mineralization of Zhilingtou Au-Ag doposit are genetically associated with hypabyssal magmatic activities in Caledonian period It is a typical epithermal or sub volcanic hydrothermal Au-Ag deposit.
1998 Vol. 7 (4): 250-257 [Abstract] ( 29 ) [HTML 1KB] [ PDF 320KB] ( 203 )
258 THE APPLICATION OF MINERALOGICAL MAPPING ON PROSPECTING IN JINLONGGOU GOLD FIELD,TANJIANSHAN
Guo Jiahui
On the basis of geologic features of Jinlonggou gold deposit,the author stresses on the application of prospecting mineralogical mapping The mapping by pyrite pyroelectricity characteristic parameter can not only determine orebody's denuded depth and extension,subquartitatively estimate orebody's vertical depth and indicate the deposit scale,but also set up temperature field and determine ore fluid's moving centre and transporting direction The curve feature of quartz thermoluminescence can identify the types of ore,mineralized and barren quartz,and reflect metallogenic periods and stages,temperature range and mineralizing intensity.
1998 Vol. 7 (4): 258-268 [Abstract] ( 35 ) [HTML 1KB] [ PDF 372KB] ( 182 )
269 CHARACTERISTICS OF VEIN/NETWORK PORPHYRY GOLD DEPOSITS OF YUERYA AND NIUXINSHAN
Li Ying, Zhang Hongwu
The porphyry gold deposit,the third most important type in China,may be classified into associated/coexisting,breccia/network and vein/network porphyry gold deposits Network porphyry gold deposit is reported abroad,while vein/network porphyry gold deposit has not yet
1998 Vol. 7 (4): 269-273 [Abstract] ( 32 ) [HTML 1KB] [ PDF 214KB] ( 253 )
274 GEOLOGICAL CHARACTERISTICS AND MINEROGENEIC MECHANISM OF THE XIAOXINANCHA GOLD COPPER DEPOSIT
Shi Junfeng
Xiaoxinancha gold-copper deposit occurs in the contact between the Late Variscan diorite and Lower Palaeozoic Wudaoguo group The mineralizing types include gold bearing quartz-sulfide veins and concentrated veinlets The ore bodies are controlled by S-N-and NW-trending faults or fractures The deposit is magmatic hydrothermal origin
1998 Vol. 7 (4): 274-280 [Abstract] ( 35 ) [HTML 1KB] [ PDF 286KB] ( 272 )
281 STUDY ON THE GOLD DEPOSIT ZONATION IN MLN AREA
Tu Huaikui
The MLN area stands for Mianxian-Lueyang-Ningqiang area in south Shaanxi province,where the gold deposits are distributed in 3 zones,i e,the Au-Tu-Ni zone in the north,the Au-Cu and placer Au-Pt zone in the south,and the Au-polymetallic deposit zone in between Vertically,the upper Fe-Mn-U zone is in sedimentary rock and volcano-sedimentary rock,and the lower Au-Pb-Zn and Au-Cu zone is in volcanic rock and pyroclastic rock MLN area is favorable for gold mineralization The exploration is promising.
1998 Vol. 7 (4): 281-287 [Abstract] ( 23 ) [HTML 1KB] [ PDF 260KB] ( 200 )
288 GEOLOGICAL CHARACTERISTICS AND METALLOGENIC MECHANISM OF HAIGOU GOLD DEPOSIT,JILIN PROVINCE
Feng Shouzhong
Haigou gold field,90 km southwest of Antu County,Jilin Province,is tectonically located on the boundary of North China platform and Variscan folding belt in Inner Mongolia The gold deposit is characterized by multi-source and multi-stage mineralization,which is related mainly to early Yanshanian granodiorite and diorite porphyrite The ore-forming matter is derived from double sources,i e,strata and magmatic rocks The metallogenic liquid is the mixture of magmatic water and meteoric water Yanshanian granodiorite is presented as heat source for mineralization This large scale deposit belongs to migmatized hydrothermal type uranium-gold deposit in genesis.
1998 Vol. 7 (4): 288-292 [Abstract] ( 38 ) [HTML 1KB] [ PDF 196KB] ( 194 )
293 SOME KEY PROBLEMS ON LOCATION PREDICTION OF HIDDEN OREBODY
Zhang Jun, Chen Shouyu, Zhang Yuxiang
In recent years,the location prediction for hidden orebody has caught a worldwide attention.Based upon the analysis to the present situation of metallic deposit exploration,the discussion in this paper focuses on present researching state and key problems of the location prediction for hidden orebody. Some new solutions to the key problems are suggested theoratically and methodically,such as collating and stipulating the emplacement mechanism and regulation of orebody,extracting and applying comprehensive prediction of information,and establishing high-precise locating prediction model and combined forecasting method systems of hidden orebody.
1998 Vol. 7 (4): 293-301 [Abstract] ( 31 ) [HTML 1KB] [ PDF 328KB] ( 201 )
302
1998 Vol. 7 (4): 302-303 [Abstract] ( 27 ) [HTML 1KB] [ PDF 78KB] ( 248 )
304
F. P. Bierlein, D. C. Arne, W. R. H. Ram say
1998 Vol. 7 (4): 304-307 [Abstract] ( 23 ) [HTML 1KB] [ PDF 156KB] ( 233 )
308 LATERITIC GOLD MINERALIZATION
Zhang Zuhai
Lateritic type gold deposit,with its unique genesis and important economic significance,has interested geologists and metallurgists The paper presents the climate condition for lateritic gold mineralization,the mechanism of gold remobilization and the implication for exploration in Yilgarn Block of Western Australia
1998 Vol. 7 (4): 308-314 [Abstract] ( 29 ) [HTML 1KB] [ PDF 270KB] ( 197 )
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