In order to evaluate the productivity of reclamation lands in mining districts,field investigation and spatial information technique were adopted to investigate influence factors of land.Based on the collected data of...In order to evaluate the productivity of reclamation lands in mining districts,field investigation and spatial information technique were adopted to investigate influence factors of land.Based on the collected data of each land,membership grade of each factor was obtained based on Fuzzy logic,and combined weight of each factor was got by analytica1 hierarch process and Delphi method.According to membership grades and combined weights of all factors,integrated fertility index(IFI)of every land was calculated to reflect levels of the productivity of reclamation lands in mining districts.Experimental results show that spatial information technique is an efficient method in field data collection,while lack of evaluation data.By means of quantificational analysis of this method,IFI is appropriate to describe the productive capacity level of reclamation lands.展开更多
The mafic-ultramafic intrusion in the XV anomaly area,contains magmatic Fe-Ti oxides±(p)ore,is located in the Bafq mining district in the Central Iran.It consists of cumulate and layered Fe-Ti-bearing gabbros and...The mafic-ultramafic intrusion in the XV anomaly area,contains magmatic Fe-Ti oxides±(p)ore,is located in the Bafq mining district in the Central Iran.It consists of cumulate and layered Fe-Ti-bearing gabbros and pyroxenites.The mineral assemblages include clinopyroxene,Fe-Ti oxides,plagioclase,amphibole,apatite and sulfides(pyrite and chalcopyrite).The Fe-Ti oxides mainly consist of magnetite-titanomagnetite and ilmenite,which occurred as disseminated,intergrowth,lamellae(trellis and sandwich textures)and inclusions.Magnetite in the gabbroic rocks is from the near end-member of Fe_(3)O_(4)(<1 wt.%TiO_(2))to titanomagnetite containing up to 8 wt.%TiO_(2)(about3.73 wt.%to 26.84 wt.%Ulvospinel(X_(Usp))).Magnetite in pyroxenite rocks is characterized with TiO_(2)range from 0.46 wt.%to 3.14 wt.%(X_(Usp)varied from 1.76 wt.%to 10.46 wt.%).The abundances of V_(2)O_(3)range from 0.03 wt.%to 1.29 wt.%and 0.24 wt.%to 1.00 wt.%for gabbro and pyroxenite,respectively.X_(Usp)contents of magnetite show insignificant correlations with Al_(2)O_(3)and MgO.The average XIlmin the ilmenite of gabbro is 92%,whereas it is 90.37%in the pyroxenite rocks.The MgO and V_(2)O_(3)contents show a slightly positive correlation with TiO_(2)in ilmenite.The composition of clinopyroxenes in gabbro and pyroxenite rocks fall in the diopside to augite field with Mg#ranging from 67 to 98 and 74 to 96,respectively.In both rock types,amphiboles are mainly pargasite and rarely actinolite.Plagioclase in pyroxenite rocks is clustered in the labradorite to andesine fields with a compositional ranges of An46-69and in gabboic rocks fall in two fields with compositional ranges of albite with An0.65-5.95and labradorite with An50-63.Theδ34S isotopic values cover a limited range from+3.15‰to+4.10‰V-CDT consistent with magmatic origin.Fe-Ti mineralization is formed in two stages,minor inclusions of Fe-Ti oxide minerals in the pyroxene and plagioclase crystallized in the early magmatic stage,whereas interstitial oxides formed by fractional crystallization processes that accumulated by gravitational settling in the later stage as intercumulus phase.Gravitational settling process is supported by the observation of decreasing the amount of Fe-Ti oxides from Fe-Ti oxide-rich pyroxenite to weak mineralized gabbro(base to top).The high contents of H2O,phosphorate and high initial Ti-Fe in parental magma are the crucial factors controlling the Fe-Ti oxides enrichment and mineralization.展开更多
Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No.11 coal seam from Antaibao surface mine,Shanxi,China and 4 samples from the coal preparation plant of this mine,the distribution of ...Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No.11 coal seam from Antaibao surface mine,Shanxi,China and 4 samples from the coal preparation plant of this mine,the distribution of the elements in the seam profile,their geo-chemical partitioning behavior during the coal cleaning and the genetic relationships between the both are studied.The conclusions are drawn as follows.The coal-forming environment was probably invaded by sea water during the post-stage of peatification,which results in the fact that the contents of As,Fe,S,etc.associated closely with sea water tend to increase toward the top of the seam,and that the kaolinite changes into illite and montmorillonite in the coal-sublayer near the roof.These elements studied are dominantly associated with kaolinite,pyrite,illite,montmorillonite,etc.,of which the As,Pb,Mn,Cs,Co,Ni,etc.are mainly associated with sulfides,the Mo,V,Nb,Hf,REEs,Ta etc.mainly with kaolintie,the Mg,Al etc.mainly with epigenetic montmorillonite,and the Rb,Cr,Ba,Cu,K,Hg,etc.mainly with epigenetic illite.The physical coal cleaning is not only effective in the removal of ash and sulfur,but also in reducing the concentra-tion of most major and trace elements.The elements Be,U,Sb,W,Br,Se,P,etc.are largely or partly organically bound showing a relatively low removability,while the removability of the other elements studied is more than 20%,of which the Mg,Mn,Hg,Fe,As,K,Al,Cs,and Cr associ-ated mostly with the coarser or epigenetic minerals show a higher removability than that of ash.The distribution of the elements in the seam profile controls their partitioning behavior to a great degree during the coal cleaning processes.展开更多
In this paper, a multiple intelligence man-machine system is put forward for productionmanagement through hierarchical cooperation in mining district, based on computer network. Thesystem’s architectural structure an...In this paper, a multiple intelligence man-machine system is put forward for productionmanagement through hierarchical cooperation in mining district, based on computer network. Thesystem’s architectural structure and operational principle are introduced. The system’s communicationbase, conference base, model base, decision base and intelligence subsystem are expounded. Besides,combining the system with a practical instance is presented to illustrate the application of the system.展开更多
The Lake Siah iron±apatite deposit is situated in the Bafq Mining District(BMD),Central Iran.The iron±apatite orebodies are hosted by a succession of rhyolite,rhyolitie tuff,trachyandesite,and andesite of Lo...The Lake Siah iron±apatite deposit is situated in the Bafq Mining District(BMD),Central Iran.The iron±apatite orebodies are hosted by a succession of rhyolite,rhyolitie tuff,trachyandesite,and andesite of Lower Cambrian age.The host rock has undergone wide-spread alteration and mineralization stages including Na(albite-quartz),followed by Na-Ca(albite-calcite--am-phibole-magnetite±quartz±epidote),magnetite-ap-atite,K(biotite±K-feldspar),hydrolytic(sericite-quartz),and argillic(kaolinite--montmorillonite±dickite),respec-tively.Electron microprobe analyses(EPMA)from mag-netite and hematite show significant variations of trace elements.Based on Ni/Cr+Mn and Ca+Al+Mn ver-sus Ti+V diagrams,the majority of magnetite samples belong to Kiruna-type deposits.At least,three generations of fluid inclusions,including solid-bearing(L+V+S)(Type I),liquid-rich(L+V)(Type II-A),vapor-rich(L+V)(Type II-B),and liquid or vapor mono-phase(Type II),are recognized in quartz and apatite.The solid-bearing fluid inclusions in quartz completely homogenized at temperatures of 150 to>530℃with salinities of 30--58 wt%NaCl equiv.Liquid-rich fluid inclusions in apatite homogenized to a liquid phase at 175--210℃,whereas the vapor-rich fuid inclusions homogenized to a vapor at 335-350°C.Oxygen isotope analysis was carried out on quartz and magnetite.The hydrogen and oxygen isotopic compositions of quartz(8"Onuid values of 7.57-11.04%)show that with progress in time the ore-forming solutions gradually evolved from a magmatic to meteoric-dominated source.展开更多
This study consisted of a geochemical analysis of the Dos Carlos tailings’ deposit located in the Mining District of Pachuca-Real del Monte in the state of Hidalgo, Central Mexico. The goal of the study was to determ...This study consisted of a geochemical analysis of the Dos Carlos tailings’ deposit located in the Mining District of Pachuca-Real del Monte in the state of Hidalgo, Central Mexico. The goal of the study was to determine the potential effects of this deposit on the environment and health of the population of the metropolitan area of Pachuca. Sampling was conducted from the top to the base of two raised sections at opposite ends of the deposit, and macroscopic features (profiles A and B) of these deposits were evaluated. Subsequently, mineralogical analyses of the collected samples were performed using X-ray diffraction and physico-chemical analysis of the leachates. The results were compared with the maximum permissible limits established by different national and international standards for drinking water and hazardous waste. In addition, geochemical modeling was conducted using PHREEQC to calculate the distribution of aqueous species, ionic activities and saturation indices.(For more information, please refer to the PDF.)展开更多
基金Project(41061043)supported by the National Natural Science Foundation of ChinaProject(2010CD032)supported by the Natural Science Foundation of Yunnan Province,China
文摘In order to evaluate the productivity of reclamation lands in mining districts,field investigation and spatial information technique were adopted to investigate influence factors of land.Based on the collected data of each land,membership grade of each factor was obtained based on Fuzzy logic,and combined weight of each factor was got by analytica1 hierarch process and Delphi method.According to membership grades and combined weights of all factors,integrated fertility index(IFI)of every land was calculated to reflect levels of the productivity of reclamation lands in mining districts.Experimental results show that spatial information technique is an efficient method in field data collection,while lack of evaluation data.By means of quantificational analysis of this method,IFI is appropriate to describe the productive capacity level of reclamation lands.
基金supported by the department of Geoscience,University of Nevada,Las Vegas,NV 89154,USAfinanced by the French Government Laboratory of Excellence Initiative(No.ANR-10-LABX-0006)the Region Auvergne and the European Regional Development Fund。
文摘The mafic-ultramafic intrusion in the XV anomaly area,contains magmatic Fe-Ti oxides±(p)ore,is located in the Bafq mining district in the Central Iran.It consists of cumulate and layered Fe-Ti-bearing gabbros and pyroxenites.The mineral assemblages include clinopyroxene,Fe-Ti oxides,plagioclase,amphibole,apatite and sulfides(pyrite and chalcopyrite).The Fe-Ti oxides mainly consist of magnetite-titanomagnetite and ilmenite,which occurred as disseminated,intergrowth,lamellae(trellis and sandwich textures)and inclusions.Magnetite in the gabbroic rocks is from the near end-member of Fe_(3)O_(4)(<1 wt.%TiO_(2))to titanomagnetite containing up to 8 wt.%TiO_(2)(about3.73 wt.%to 26.84 wt.%Ulvospinel(X_(Usp))).Magnetite in pyroxenite rocks is characterized with TiO_(2)range from 0.46 wt.%to 3.14 wt.%(X_(Usp)varied from 1.76 wt.%to 10.46 wt.%).The abundances of V_(2)O_(3)range from 0.03 wt.%to 1.29 wt.%and 0.24 wt.%to 1.00 wt.%for gabbro and pyroxenite,respectively.X_(Usp)contents of magnetite show insignificant correlations with Al_(2)O_(3)and MgO.The average XIlmin the ilmenite of gabbro is 92%,whereas it is 90.37%in the pyroxenite rocks.The MgO and V_(2)O_(3)contents show a slightly positive correlation with TiO_(2)in ilmenite.The composition of clinopyroxenes in gabbro and pyroxenite rocks fall in the diopside to augite field with Mg#ranging from 67 to 98 and 74 to 96,respectively.In both rock types,amphiboles are mainly pargasite and rarely actinolite.Plagioclase in pyroxenite rocks is clustered in the labradorite to andesine fields with a compositional ranges of An46-69and in gabboic rocks fall in two fields with compositional ranges of albite with An0.65-5.95and labradorite with An50-63.Theδ34S isotopic values cover a limited range from+3.15‰to+4.10‰V-CDT consistent with magmatic origin.Fe-Ti mineralization is formed in two stages,minor inclusions of Fe-Ti oxide minerals in the pyroxene and plagioclase crystallized in the early magmatic stage,whereas interstitial oxides formed by fractional crystallization processes that accumulated by gravitational settling in the later stage as intercumulus phase.Gravitational settling process is supported by the observation of decreasing the amount of Fe-Ti oxides from Fe-Ti oxide-rich pyroxenite to weak mineralized gabbro(base to top).The high contents of H2O,phosphorate and high initial Ti-Fe in parental magma are the crucial factors controlling the Fe-Ti oxides enrichment and mineralization.
基金supported by the Key Science and Technology Project of the China National Administration of Coal Geology and the Innovation Projects for Graduate Students,Jiangsu Province,China(2003).
文摘Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No.11 coal seam from Antaibao surface mine,Shanxi,China and 4 samples from the coal preparation plant of this mine,the distribution of the elements in the seam profile,their geo-chemical partitioning behavior during the coal cleaning and the genetic relationships between the both are studied.The conclusions are drawn as follows.The coal-forming environment was probably invaded by sea water during the post-stage of peatification,which results in the fact that the contents of As,Fe,S,etc.associated closely with sea water tend to increase toward the top of the seam,and that the kaolinite changes into illite and montmorillonite in the coal-sublayer near the roof.These elements studied are dominantly associated with kaolinite,pyrite,illite,montmorillonite,etc.,of which the As,Pb,Mn,Cs,Co,Ni,etc.are mainly associated with sulfides,the Mo,V,Nb,Hf,REEs,Ta etc.mainly with kaolintie,the Mg,Al etc.mainly with epigenetic montmorillonite,and the Rb,Cr,Ba,Cu,K,Hg,etc.mainly with epigenetic illite.The physical coal cleaning is not only effective in the removal of ash and sulfur,but also in reducing the concentra-tion of most major and trace elements.The elements Be,U,Sb,W,Br,Se,P,etc.are largely or partly organically bound showing a relatively low removability,while the removability of the other elements studied is more than 20%,of which the Mg,Mn,Hg,Fe,As,K,Al,Cs,and Cr associ-ated mostly with the coarser or epigenetic minerals show a higher removability than that of ash.The distribution of the elements in the seam profile controls their partitioning behavior to a great degree during the coal cleaning processes.
文摘In this paper, a multiple intelligence man-machine system is put forward for productionmanagement through hierarchical cooperation in mining district, based on computer network. Thesystem’s architectural structure and operational principle are introduced. The system’s communicationbase, conference base, model base, decision base and intelligence subsystem are expounded. Besides,combining the system with a practical instance is presented to illustrate the application of the system.
文摘The Lake Siah iron±apatite deposit is situated in the Bafq Mining District(BMD),Central Iran.The iron±apatite orebodies are hosted by a succession of rhyolite,rhyolitie tuff,trachyandesite,and andesite of Lower Cambrian age.The host rock has undergone wide-spread alteration and mineralization stages including Na(albite-quartz),followed by Na-Ca(albite-calcite--am-phibole-magnetite±quartz±epidote),magnetite-ap-atite,K(biotite±K-feldspar),hydrolytic(sericite-quartz),and argillic(kaolinite--montmorillonite±dickite),respec-tively.Electron microprobe analyses(EPMA)from mag-netite and hematite show significant variations of trace elements.Based on Ni/Cr+Mn and Ca+Al+Mn ver-sus Ti+V diagrams,the majority of magnetite samples belong to Kiruna-type deposits.At least,three generations of fluid inclusions,including solid-bearing(L+V+S)(Type I),liquid-rich(L+V)(Type II-A),vapor-rich(L+V)(Type II-B),and liquid or vapor mono-phase(Type II),are recognized in quartz and apatite.The solid-bearing fluid inclusions in quartz completely homogenized at temperatures of 150 to>530℃with salinities of 30--58 wt%NaCl equiv.Liquid-rich fluid inclusions in apatite homogenized to a liquid phase at 175--210℃,whereas the vapor-rich fuid inclusions homogenized to a vapor at 335-350°C.Oxygen isotope analysis was carried out on quartz and magnetite.The hydrogen and oxygen isotopic compositions of quartz(8"Onuid values of 7.57-11.04%)show that with progress in time the ore-forming solutions gradually evolved from a magmatic to meteoric-dominated source.
基金the Faculty Improvement Program(PROMEP)for financing through the project F-PROMEP-38/Rev-03,SEP-23-005.
文摘This study consisted of a geochemical analysis of the Dos Carlos tailings’ deposit located in the Mining District of Pachuca-Real del Monte in the state of Hidalgo, Central Mexico. The goal of the study was to determine the potential effects of this deposit on the environment and health of the population of the metropolitan area of Pachuca. Sampling was conducted from the top to the base of two raised sections at opposite ends of the deposit, and macroscopic features (profiles A and B) of these deposits were evaluated. Subsequently, mineralogical analyses of the collected samples were performed using X-ray diffraction and physico-chemical analysis of the leachates. The results were compared with the maximum permissible limits established by different national and international standards for drinking water and hazardous waste. In addition, geochemical modeling was conducted using PHREEQC to calculate the distribution of aqueous species, ionic activities and saturation indices.(For more information, please refer to the PDF.)
