The Sharibaotu Au-Pb-Zn-Cu ore-deposit，located in City Chifeng of Inner Mogolia，is controlled by faults and has obvious altered phenomenon．According to the geological characteristics of Au-Pb-Zn-Cu ore-deposit．by
means，the advanced geophysical exploration methods，such as VLF and EH4，is making system evaluation for ore oecurrences．Th e results of the VLF surveying have been primarily shown an ideal low resistivity zone with the length more than 600 m，induced by the primary mineralizing zone．The results of the EH4 surveying also have been revealed the primary mineralizing zone which is reflected by nearly erective low resistivity belt go deep into from 400 m to 600 m．The geological and geophysical research rusuh indicate an ideal and great ore-forming prospect in the Sharibaotu deposit．
The area including west of Shanxi，south of Gansu，northeast of Sichuan is famous as“gold triangle”of chi—
na．There is diverse gold styles，placer gold is possessed alluvial type and glacial stack type，rock gold is provided with micro-disseminate，gold-bearing quartz vein type，tectonic altered rock type，polymetallic altered rock type，selenium-gold and volcanic type．Based on partition of regional geological structural elements，tectonic activity，magma activity，metallogenic regularity and geological characteristics，combining with the distribution of geochemical anomaly，“gold triangle”can be divided into six gold metallogenic belts，three mining distinctions and seven metallogenic prospecting area．
Based on the ore—forming conditions，ore vein characteristics，orebody characteristics and wallrock alteration，of the shallow ore—deposits about No．171 vein gold deposit in Dongfeng mining area，we discuss and summarize the genesis of Ore-deposit and the metallogenic regularity，combined with No．171 gold field，the data of mineralization projections and the current exploration results about some simi lar ore—depo sits at home an d abroad，then predict the resources of the deep Ore body．By actual exploration，we found a large gold deposit，it have some si ficance to china's deep blind ore prospecting．
Mawu gold deposit is similar to the gold deposits of Zhongchuan area with geological characteristics．In quartz reef of the main ore-forming stage of Mawu，δD is -78‰~-98‰，δ18OSMOW is 18.0‰～20．2‰,δOH2O is 0．45‰~8．54‰．It shows that ore-forming fluids is mixture water of the magmatic water，metamorphic water and little atmospheric water，magmatic water and metamorphic water is main，and has a small amount of atmospheric precipitation participated in．In quartz reef of the main ore—form ing stage，compose of δ34S is +7．1‰～+7．9‰，average is+7．65‰，compose of 6 S show smaller change range．It shows the characteristics of form ation of stratum sulfur，ore-forming materials root in the Shujiaba formation.Theregional deep fault of F1 and anticline Mawu common control of Mawu gold deposit’s output，F1 is passage structure for ore materials，interlaminar fracture zones and tensile cranny of anticline Mawu and F1-derived secondary structural system is ore-hosting structure．The upbuilding of ore-controlling tectonic model is very important for next prospecting．
Yanzigou gold deposit is located in the middle of Yongxi fomix，in danba county，Sichuan province．The ore
body Occurs in epimetamorphic black shale series in Devonian Weiguan group．is lenticular and stratiform—like．The formarion of ore body is related to gold—bearing stockwork qua~z veins．and it is obviously controlled by fracture．The“X” type structure constituted by NNE striking Maoniuhe fault and EW striking Mozigou fault and other small faults provides great mi gration and storage space for the ore-forming fluid．In addition magmatism and metamorphism play very important hales in mineralization．
On the base of summarizing and analy ng the ore-forming reaulanty of copper and gold deposits in the ore-centralizetion area of northeastem Jiangxi province，this research selects twelves kinds of ore-controlling evidence，such as structure，magmatie rock，remote sensing，Au、Ag、Cu element streanl sediment anomaly，adopts weights of evidence method created by Agterberg F P to predicate ore-forming anomalies and evaluate copper and gold mineral n 0un es of the northeastem Jiangxi province．The quantitafive prediction and evaluation of n~neral resources in this area achieved by using the softwal~of MAPGIS and MRAS．According to the value of posterior probability，the Cu、Au metallogenic prospecting area are classified into three grades．Seven ore potential area are delineated in the ore—centmlization area through this study，especially Wancun—Zhangiia、Huaiyushan—Lingshan、Hefeng-Huangshan three prospecting areas will be the focus of next prospecting．
Dashui gold deposit occurs in the diorite and the contact zone as well as surrounding limestone．Diorite veins
and red—brown hematized limestone are widely distributing in the surface．Large amounts of fine disseminated and veinlet pyrites occur in the lower oxidized zone in the gold deposit．The Co/Ni ratios range from 1 to 5，close to the pyrite formed by magmatism．The REE pattern describes that gangue minerals are close to diorite veins，but quite diferent from limestone．Thus，REE geochemistry indicates that the ore-form ing materials mainly came from diorite veins closely related to tectono—magmatism．The 634S values of pyrite range from -1.8‰ to +4.1‰ with a mean of +2.4‰．reflecting a deep source of sulfur．Samples analyzed for hydrogen and oxygen isotopic compositions of the calcites oreforming fluids were mainly magmatic water，and might be the product of mixing of meteoric water and magmatic water at the late mineralization stage．Studies on geological and geochemical characteristics show that Dashui gold deposit derived its ore-forming materials from the hosted diorite，the ore·fluids were largely magmatic water，as sulfides·rich diorite-type gold deposit．
Shizimiao Au-Mo ore field is located in the middle part of Machaoying fault zone，it contains Shiyaogou nolybdenum deposit，three gold deposits such as Yuanling，Hongzhuang and Nanping．Machaoying fault zone is the main ore-controlling structure，its local pressure extending part is the main holding ore space，the mineralization closely related with intermediate acidic magmatic activity at Yanshan Period．Shiyaogou molybdenum deposit is a porphyry type molybdenum deposit controlled by blind porphyry body．The mineralization of Ag-Pb ，Au，Mo is unified with time and space，and form a holistic natural ore—form ing system．
Lengshuichong gold deposit forms in the carbonaceous sandstone and shale of Cambrian．The characteristics of edding distribution is obvious．The ore formed in fracture zone with the form of quartz vein qua~z stoekwork．The abundance of gold have higher value in Cambrian，which become a gold-bearing geological body．It insense violent tectonic activities and development of fracture zones．The gold orebody in the Lengshuiehong is formed by ore—bearing hydrotherreal solution filling along fracture zone which is controlled by main faults．Controlled by the folds and fracture in mining area，the vein is usually parallel distribution．As the multi-period and multi-stage of tectonic activity，the quartz vein in ore body and gold mineralization also have characteristics of the period．
Zhaoyuan-Pingdu metallogenic belt is a base of gold exploration and production in Jiaodong．Large and medium size gold deposits such as Dayingezhuang，Jiangjiayao，Xiadian and Shanhou occur in the belt．Shanhou-Weishishan area have gold metallogenic condition and good prospecting．Through analysing the ore-bearing geological characteristics of Zhaoyuan—Pingdu fault zone and the structural superimposed halos of its south segment，combining field firsthand materials，we conclude metallogenic regularity and put forwaM the prospecting direction.
Through discussing the geological background of Au—Cu deposit at Zhamashixigou，and summarizing its basic geological features，we hold that the intermediate—acid volcanic rocks at Ordovician in this area is the bearing lithology，it also controls the formation of the ore-body．From the project to expose，the partial formation of a clear snuf color limonite alteration zone is in favor of the formation of gold．mostly along Xigou Ordovician volcanic rock distribution，with the conditions of forming the structure of strata，to find great potential for mining．
This paper presents a gold mine in Gansu secondary recovery tailings heap leaching of low-cost heap leaching process and test results．The grade of gold is 2．51 g／t，heap leaching tailings after more than two months of trial，the rate of gold leaching reached 32．29％，the pharmaceutical consumption of 0．14 kg／t．lime amount of 4．43 kg／t．Pharm aceutical consumption is low，out of 0．8 1 grams of gold per ton of ore.According to estimates of gold prices in recent years，very substantial economic benefits．Handicraft method has been easy to do simplely，a good solution to the gold mine tailings heap leaching of secondary recovery．
Most of flotation railings of Chuantou gold deposit in Luoyang are belong the primary ore of inclusion type in
low grade with fine grained particles and wrapper taye．Among of them,a part of oxidized ores are suitable to be
leached with cyanide for gold recovery，the tailing grade is 1． 2～1．74 g／t．Through research and experiment.based on the characteristics of the tailing，its grade can be lowered and the leaching rate can be raised by way of adding the right amount of high eficacious leachant to the reacted． As a result，the tailing grade were lowered t0 0．2～0．5 g／t．The leaching rates raised to 79．78％ (the original rate was 50%)，making a profit of 10 to 15 yuan per t0n tailing,and this method is better at the tailing，which contains lower As、 Cu and Ti，its cyaniding leaching Yield should be higher，so it can be used widely in the future．
Over the years，the concentrator take some technical methods and measurment，such as the production of frequeney conversion technology，the application of advanced inverter technology ，the promotion of power factor of power grids，the recycling use of water resources and reasonabe distribution the electricity time，to enhance effectively the target level of the overall energy consumption．The frame of energy consumation was continually optimized．From 1996 to present，the drop of energy-consumption of concentrator system reached 23．96%，it have made great economic benefits and social benefits．
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