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Geochemistry of siliceous rocks and germanium mineralization of Lincang superlarge germanium deposit in Yunnan Province

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Chinese Science Bulletin 1999年第S2期44卷 156-157页

作者： SU Wenchao, HU Ruizhong, QI Huawen and YE Zaojun Open Laboraory of ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Open Laboraory of ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

GERMANIUM, as a dispersed element, is highly dispersed in the crust and any independent deposit of ithas never been reported. It has long been obtained as a byproduct from some sulfide-rich deposits andcoal beds. the Lincang germanium deposit discovered in recent years in China can be considered as an independent germanium deposit of superlarge reserves. At present, about 800 t of germanium reserves havebeen exploited, the most part of which is concentrated in the first cycle of coal at the bottom of the basindeveloped on a granite basement, while the upper three coal cycles are basically barren. Bodies of Gemineralization exhibit a zonal pattern trending NNW, in consistence with the distribution of the siliceousrocks in the first coal cycle. Here we describe the geochemical characteristics of the siliceous rocks intercalated with the first

关键词： germanium mineralization siliceous rocks Lincang superlarge germanium depeosit Yunnan.

Regional tectonics, geology, magma chamber processes and mineralisation of the Jinchuan nickel-copper-PGE deposit, Gansu Province, China： A review

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Geoscience Frontiers 2016年第3期7卷 431-451页

作者： t.M. (Mike) Porter Porter GeoConsultancy Pry Ltd. Linden Park 5065 SA Australia

the Jinchuan Ni-Cu-PGE deposit（〉500 Mt @1.2%Ni,0.7%Cu,～0.4 g/t PGE）,one of the largest magmatic sulphide deposits in the world,is located within the westernmost terrane of the North China *** is hosted within the 6.5 km long,Neoproterozoic（～0.83 Ga） Jinchuan ultramafic intrusion,emplaced as a sill-like body into a Palaeoproterozoic suite of gneisses,migmatites,marbles and amphibolites,below an active intracratonic *** parental magma was high-Mg basalt,generated through melting of subcrustal lithospheric mantle by a mantle plume during the initiation of Rodinia supercontinent *** lower Palaeozoic collision of the exotic Qilian Block with the breakup-related southern margin of the craton accreted a subduction complex,and emplaced voluminous granitic intrusions and foreland basin sequences within the craton,to as far north as *** the Cainozoic,allochthonous lower Palaeozoic rocks were thrust up to 300 km to the northeast over cratonic basement,to within 25 km of the Jinchuan *** Jinchuan ultramafic intrusion was injected into three interconnected sub-chambers,each containing a separate *** essentially comprises an olivine-orthopyroxene-chromite cumulate,with interstitial orthopyroxene,clinopyroxene,plagioclase and phlogopite,and is predominantly composed of lherzolite（～80%）,with an outer rim of olivine pyroxenite and cores of mineralised *** occurs as disseminated and net-textured sulphides,predominantly within the dunite,with lesser,PGE rich lenses,late massive sulphide accumulations,small copper rich pods and limited mineralised diopside skarn in wall rock *** principal ore minerals are pyrrhotite（the dominant sulphide）,pentlandite,chalcopyrite,cubanite,mackinawite and pyrite,with a variety of platinum group minerals and minor *** deposit underwent significant post-magmatic tremolite-actinolite,chlorite,serpentine and magnetite *** volume of thejinchuan intrusion accounts for 〈3%

关键词： Rodinia break-up rifting Plume related Deep staging chamber Olivine-orthopyroxene-chromite cumulate Net textured and disseminated sulphides Post-magmatic alteration

the geology, structure and mineralisation of the Oyu tolgoi porphyry copper-gold-molybdenum deposits, Mongolia： A review

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Geoscience Frontiers 2016年第3期7卷 375-407页

作者： t.M.(Mike) Porter Porter CeoConsultancy Ply Ltd. Linden Park 5065 SA Australia

the Oyu tolgoi cluster of seven porphyry Cu-Au-Mo deposits in southern Mongolia,define a narrow,linear,12 km long,almost continuously mineralised trend,which contains in excess of 42 Mt of Cu and1850 t of Au,and is among the largest high grade porphyry Cu-Au deposits in the *** deposits lie within the Gurvansayhan island-arc terrane,a fault bounded segment of the broader Silurian to Carboniferous Kazakh-Mongol arc,located towards the southern margin of the Central Asian Orogenic Belt,a collage of magmatic arcs that were periodically active from the late Neoproterozoic to Permotriassic,extending from the Urals Mountains to the Pacific *** at Oyu tolgoi is associated with multiple,overlapping,intrusions of late Devonian（～372 to 370 Ma） quartzmonzodiorite intruding Devonian（or older） juvenile,probably intra-oceanic arc-related,basaltic lavas and lesser volcaniclastic rocks,unconformably overlain by late Devonian（～370 Ma） basaltic to dacitic pyroclastic and volcano sedimentary *** quartz-monzodiorite intrusions range from earlymineral porphyritic dykes,to larger,linear,syn-,late- and post-mineral dykes and *** was deposited within syn-mineral quartz-monzodiorites,but is dominantly hosted by augite basalts and to a lesser degree by overlying dacitic pyroclastic *** ore deposition,an allochthonous plate of older Devonian（or pre-Devonian） rocks was overthrust and a post.ore biotite granodiorite intruded at～365 *** is characterised by varying,telescoped stages of intrusion and *** A-type quartz veined dykes were followed by Cu-Au mineralisation associated with potassic alteration,mainly K-feldspar in quartz-monzodiorite and biotite-magnetite in basaltic *** reflux of cooled,late-magmatic hydrothermal fluid resulted in intense quartz-sericite retrograde alteration in the upper parts of the main syn-mineral intrusions,and an equivalent chlorite-muscovite/illite-hematite assemblage in bas

关键词： tectonic setting Porphyry copper-gold-molybdenum deposit High sulphidation Geology Alteration Structure

the genesis of the slab window-related Arzular low-sulfidation epithermal gold mineralization(eastern Pontides,NE turkey)

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Geoscience Frontiers 2013年第4期4卷 409-421页

作者： Enver Akaryali Necati tysz Gumushane University Department of Geology Karadeniz technical University.Department of Geology

the Arzular mineralization is one of the best examples of epithermal gold deposits in the eastern Pontides orogenic belt. the mineralization is hosted by the subduction-related basaltic andesites and is mainly controlled by E W and NE SW trending fracture zones. the main ore minerals are galena. sphalerite, pyrite, chalcopyrite, tetrahedrite and gold. Homogenization temperatures of fluid inclu- sions are between 130 and 295 C for quartz and between 90 and 133 C for sphalerite. Sulphur isotope values obtained fiom pyrite, galena and sphalerite vary between 1.2‰ and 3‰ indicating that sulphur belongs to magmatic origin and was derived from the Lutetian non-adakitic granitic intrusions in the region. Oxygen isotope values are between 15.0‰, and 16.7‰ and hydrogen isotope values are between -87‰ and 91‰ the sulphur isotope thermometer yielded temperatures in the range of 244-291 C for the ore formation. Our results support the hypothesis that the Arzular mineralization is a low-sulfidation epithermal gold deposit associated with non-adakitic subduction- related granitic magmas that were generated by slab window-related processes in a south-dipping subduction zone during the Lutetian.

关键词： Slab windowEpithermal goldIsotopeFluid inclusionMineralizationtectonics

Mill tailings based composites as paste backfill in mines of U-bearing dolomitic limestone ore

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第2期10卷 310-322页

作者： Sandeep Panchal Debasis Deb t.Sreenivas Department of Mining Engineering Indian Institute of Technology Mineral Processing Division Bhabha Atomic Research Centre

this paper elaborates on the development of paste backfill using mill tailings generated during the processing of a uranium ore deposit hosted in dolomitic limestone. the tailings have been characterized in terms of the physical, chemical and mineralogical properties. time-dependent rheological behaviors and geotechnical properties of cemented paste backfill(CPB) are also determined. the studies show that the mill tailing has the potential to form paste and the CPB has adequate strength to provide support to mine pillars, roofs, and walls.

关键词： Mining engineering Uranium ore deposit tailings Cemented paste backfill(CPB) Rheology Compressive strength

StUDY ON tHE DUCtILE DEFORMAtION DOMAIN OF tHE SIMPLE SHEAR IN ROCKS——tAKING BRIttLE FAULtS OF tHE COVERING StRAtA IN tHE SOUtHERN JIANGSU AREA AS AN EXAMPLE

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Science China Chemistry 1992年第12期35卷 1512-1520页

作者：孙岩沈修志 t.SUZUKI Department of Earth Sciences Nanjing UniversityNanjing 210008PRC Department of Geology Kochi University Kochi 780 Japan

A study on the ductile deformation domain of the brittle fault in the shallow level ofthe crust is a new probe field for the modern structural geology. taking the southern Jiang-su Province area as an example the orientation measurement of quartz crystals, the com-positional texture observation of three pressure sensitive minerals and the rheological param-eter determination of dislocation densities, etc. have been demonstrated and analysed basedon typical samples in the present paper. In addition, their generation mechanisms arealso discussed from the cataclastic rheology, the dynamic differentiation and the simpleshearing, specially, from the Ode strength theory. Finally, a generative relationship betweenthe ductile deformation domain of the brittle fault system, in the regional layer--slip andthe formation of the stratabound ore deposit is shown as well.

关键词： simple shear ductile deformation btittle fault crystal orientation dislocation structure southern Jiangsu area

Life cycle inventory for base metal ingots production in Japan including mining and mineral processing processes by cost estimating system database

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中国有色金属学会会刊：英文版 2007年第A1期17卷 131-135页

作者： t.ADACHI G.MOGI Department of Materials and Environmental Science Institute of Industrial ScienceThe University of TokyoKomabaMeguro-KuTokyo 153-8505Japan Department of technology Management for Innovation The University of TokyoHongoBunkyo-Ku Tokyo 113-8656Japan

CO2 emission levels of copper and zinc mines from which Japanese smelters import.ore concentrates into Japan,were estimated by using a database called MLED. Eleven copper mines selected from data availability of mine site covered 84% of the total imported concentrates. Adding inventories of sea transportation and smelting processes to mine development process,total CO2 emission level for copper and zinc ingots produced in Japan were calculated. the results show that the emission share of mining and mineral processing processes for each mine is indicated around 30%-70% of total emission for ingots,which implies the importance of including the mining activities to the inventory of upper stream products.

关键词：金属材料铸造方法矿物二氧化碳

REDUCtION BEHAVIOR OF IRON ore PELLEtS CONtAININGCARBON UNDER NON-ISOtHERMAL CONDItION

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Acta Metallurgica Sinica(English Letters) 2000年第5期13卷 1059-1067页

作者： X.M.Yang Y.S.Xie D.G.Wang D.B.Huang t.J.Yang L.t.Kong Institute of Chemical Metallurgy The Chinese Academy of Sciences Beijing 100080China University of Science and technology Beijing Beijing 100083China

the reduction behavior of iron ore pellets containing carbon under non-isothermal condition in the temperature range from 573 to 1373 K was investigated in a laboratory scale setup. the test results show that carbon content has no obvious effect on reduction degree of composite pellets (C/O mole ratio=1.0) by CO in the temperature range from 573 to 1373 K under linear temperature-rising program; reduction degree of iron ore pellets containing carbon is large in 90%CO-10%CO2 mixture than that of in 100%CO atmosphere or in 80%CO-20%CO2 mixture; the s type temperature-rising program has a better effect than that of linear one in increasing the reduction degree; and reduction degree of slower linear temperature-rising program is greater than that of faster one, but the final reduction degrees, i.e., those at the highest temperature are about the same for various CO partial pressures or temperature-rising programs. the kinetic analysis also shows that the reduction of iron ore-carbon composite pellets by CO or CO-CO2 mixture under non-isothermal condition should be controlled by surface reaction, and the apparent reduction activation energy changes with the reduction progress under various test conditions.

关键词： iron ore pellet containing carbon reduction behavior kinetics activation energy non-isothermal

Effect of pyroxenite and olivine minerals as source of MgO in hematite pellet on improvement of metallurgical properties

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Journal of Central South University 2015年第9期22卷 3302-3310页

作者： Jagannath Pal Satadal Ghorai Bikash Nandi tapas Chakraborty Goutam Das t.Venugopalan CSIR-National Metallurgical Laboratory tata Steel

Pelletization of hematite ore requires high fineness and very high induration temperature（~1325 ℃） owing to its poor diffusion bonding unlike magnetite ore. Further, high-alumina hematite pellets show very high reduction degradation index（RDI） during low temperature（500-650 ℃） reduction due to their volume expansion and lattice distortion. Noamundi（India） hematite ore contains very high Al2O3（2.3%） with adverse ratio of alumina to silica（~2） for which, it shows very high RDI. In this work, the acid pellets prepared from Noamundi ore fines of optimum Blaine fineness show good cold crushing strength（CCS）. However, it shows very high RDI（77%）. In order to reduce RDI, Mg O in form of two different gangue-containing fluxes, such as pyroxenite and olivine in varying quantities has been added. the optimum requirement and performance of these fluxes has been examined and compared. Both pyroxenite and olivine fluxed pellets show significant lowering of RDI（26% and 23%, respectively） and improvement of other properties, viz CCS, swelling indices etc with good reducibility（70%-77%）. Finally, a good quality acidic hematite pellet was developed from high-alumina ore without using any lime which is very important charge material in combination of basic sinter in blast furnace.

关键词： hematite pellet high-alumina ore reduction degradation index(RDI) pyroxenite flux olivine flux effect of MgO