Ganzi-Muli is a main metallogenic belt in western China.By studying it’s metallogenic geological backgrounds, characteristics of structural activities, main types of the gold deposits and ore-controlling factors, and in virtue of the statistical prediction of DPIS(Deposit Positioning Inspecting System) and comprehensive information statistics, seven oreprospecting areas, identically, four A-type prospective areas and three B-type ones among them have been lineated. Furthermore, metallogenic characteristics and prospecting direction of every areas above have been discussed.
According to regionalgeologicalbackground of Bayanchagan gold deposit ， com bined w ith its ore- body characteristics.W e discuss the ore- controlling condition about regional structure ， ore- form ing m aterials ， m ining area structure and m agm atic rock ， concluded the prospecting m odel and the prosp ecting signs ， then deduced prospecting direction.
J inqingding, Sanjia, Yinggezhuang gold deposit is located inMuping-Wendeng from the southern edge of the text of the eastern part of the J iaodong, the central ofMuping-Rushan metallogenic belt. NNE fracture in this region develop smostly, provides an advantaged occurrence for the enrichment and mineralization of gold hydrothermal. Mu-Ru gold metallogenic belt lays on a side of granite which is on the contact belt of granite in Kunyu mountain and metamorphic rock in J iaodong group, reflects the ore-controlling characteristics of the time, space and ore-controlling characteristics of rocks. Muping-Rushan metallogenic belt of the region can be divided into four tectonic NW bands,of which only J inniushan-Jinqingdingmetallogenic belt, the Sanjia metallogenic belt is relatively strong tectonic metallogenic belt, while the other two with more mineralization weak, non-dyke development, very little industrialmineral deposits. Beginningwith metallogenic geological condition , geological characteristics of ore-bed ,ore-forming, laws of gold enrichment, we analyse the ore-controlling factors, and put out a new prospecting direction.
Many gold deposits have been discovered in Jiao-Lai basin and its periphery.Thema in type of discovered deposits as follows:middle temperature hydrothermalme tasomatic alternation rock type gold deposit controlled by slid dismantled fault (Pengjiakuang in Rushan),middle temperature hydrothermalmetasomatic filled alternation gravel-stone type gold deposit controlled by tectonics (Fayunkuang in Muping),middle temperature hydrothermal-reformed type gold deposit(Dazhuangzi in Pingdu),subvolcanic rock type gold deposit(Qibaoshan in Wulian).Their geneses are discussed.Analyzing their ore geological characteristics,deposit types and genesis,evolving history,we find that they are both similarities and differences,in different tectoniclocation,different ore-forming fluid add in to form different types of gold deposits.On this bases,we hope that it can promote the research of the deposits in Jiao-Lai basin and its periphery,and direct farther prospecting derection.
Jinqingding gold deposit is located in the eastern of Jiaodong up lift and in the middle of mineralization zone of Muping-Rushan gold deposit. The type of ore is mainly containing gold pyrite quartz vein, the of orebody is output with steep-pour shape, the vertical zoning characteristics of ore is very obviously and deepening is more than prolonging. The exploitation of deposit is nearly fourty years history, and now enter a seriously crisis of resources. Though analysis the ore-controlling condition and deposit characteristics,we think that the genesis of deposit is middle-low temperature quartz vein hydrothermal type gold deposit which is related to on the temporal and spatial distribution.
Galashan-Fucaoshan region, lying in the northern part of Xiaoxing'an ling Mountain, is typically of forest bog and frozen earth sight. The densely distributed swarps and thick soil coverage lead to the difficulty of ore-hunting.Many anormallies are obtained from the geochemical exploration done by our party in 2007-2008, among which HS-Au-15 strean sediment anormally is with large scale, obvious concentration center, clear concentration zonation, excellent abnormal conbination characteristics and advantageous geological conditions. By the detection of soil and trenches, 5 gold ore-bodies are discovered, with highest gold grade of 26.18×10-6, which provides firm basis for the future ore-prospecting.
In this article, the research status of the coal gold agglomeration (CGA) were introduced and a few major factors affecting coal-gold-oil agglomeration were discussed, such as coal chemistry, oil characteristics, and interaction among hydrophobic particles. Moreover, agitation intensity and contact time were also studied for gold recovery kinetics in CGA process. In the case of the same gold ore and other same conditions, the gold recovery kinetics rate coefficient is constant under the different agitation speed. The coal-oil agglomerateswere found having abilities of gold recovery with collector-free, the gold recoverywas up to 77%～86%. The addition of sodium sulfide (160～260 g/t) can activate the surface of gold particles, increase the gold recovery while the floatability of sulfides in gold pulp slightly decreased.
The compass has a lot of merits, for example, light and flexible, the operation to be simple facilely, the observation speed quick and suits in narrow land sector survey and so on. It is themain instrument in the process of surveying the courtyard and underground stope measurement. Because it uses a large number of irons instead of wood in the underground, has the magnetic disturbance, causes the observation condition very inaccessib ility the above request. Using themeasuring error theory, we has carried on the error analysis to the compasswire, proposedm any certainm easures of increasing the compass wire precision, in order to be able to extend service life of the compass in the gold mine.
In the high mountain area under arid climate, the anomaly of stream sediment survey was cheeked by ravine system debris survey. It is quick, economical and precise for outlining the spatial distribution of minera lization.Ravine system debris survey is an informal networking geochemical exploration method.The collecting target is debris which is detained on the surface of bedrock and eluvium after the wind transportation of plasma.In the prospecting project“The mass screening of Caishigou-Hongshuigou area in Mangya, Qinghai”in Qinghai province, 1998,six points within composite anomaly were trapped by the ravine system debris survey, and through grade-Ⅱ checking,four belts of mineralization zone with gold were found. It shows that ravine system debris survey plays and directing role in the mineral resource evaluation work of Caishigou area.
Lashuix ia Cu-Ni deposit is located in the middle of Riyue Mountain-Hualong new proterozoic mass if which is the southw estern margin of Qin-Qi-Kun orogenic belt.Host stratum is a set of intermediate and advanced level metamorphic rock of Hualong group, which mainly included biotite plagioclase gneiss and horn blendic schist.Because the mining field is covered by strata, about 50～150 m thickness, purplishred conglomerate and clay rock and so on in paleogene-neogene Xining group. In this area, it is difficult to play a role by using conventional mineral exploration method. Eleven anomalies have been found in this mining area recently by 1∶5 000 geogas and mercury gasmeasurement detailed investigation. Preliminary,Ⅰ anomaly and Ⅲ anomaly have a great prospecting significance. These results show that geogas and mercury gas measurement has a certain referential significance for finding concealed ore-beds.
We introduce the preliminary app lication of surpac mineral softwore in the mining of Jiaojia gold mine, Shandong gold group Co., Ltd. With the actual situation of ourmine, we discuss the advantages and disadvantages of 3-D mining design, compared with 2-D drowing. Moreover, we point out the improving assumption, and hope that it can promote the construction of the digitalmine.
The underground of Sizhuangmining area exists old workings thatwas formed byminingmethod of past, because we can’t take filling treatment method for old workings for long times, it lead to parts of general collapse and form hidden danger of orebody nearby mining. Through construction of a little under direction patio engineering and gap transfixion, erection of grizzly for backfilling lots of waste rock produced tunneling engineering,we make dry backfill forworkings, and recovery top pillar ore of primary shrinkage method as backfilling roof contact. The comprehensive treatmentmethod is advantage of low cost, consump tion of tunneling waste rock, recovery ore pillar, and has reference value for old workings of similar middle-small mine.
Based on the latest statistics data,the article reveals the recent situation of the global gold market and its trend in the near future from three aspects:market demand, gold price and gold mining.Recently influenced by the invest shift,gold market demand brisks up, gold price keeps going up,and gold mining becomes blooming.In the near future, this active state will be continued.
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