Synthetic Information Mineralization Prediction Research Of Gold Mines In Sarbulak Region, Fuyun County, Xinjiang

Synthetic information mineralization prediction (SIMP) makes up one important component part of mathematical geology. Using the theory and method of SIMP, based on the data of 1 : 50000 aerial surveys and 1 : 50000 regional geology surveys, and combined with the materials of 1 : 50000 geochemical exploration (arsenopyrite involved) and 1 : 200000 water system sediment measurement, synthetic information research is made. Information of regional geological conditions, mineralization geophysical conditions, and mineralization geological- geophysical-geochemical material of the mining area in Sarbulak region is extracted. Synthetic information model of classical mineral deposit is set up, synthetic information prediction of large-middle scale gold (copper) mine is made and gold (copper) mine exploration targets are proposed,.This research work is directed by the theory and method of SIMP, and its main goal is to find large-middle scale gold (copper) mine, based on systematic collection of geological, geophysical prospecting, geochemical exploration, remote sensing data, and data from mine geology and scientific research, and new exploration progress in Sarbulak. Using the theory and method of SIMP, we study and process the material of geophysical prospecting, geochemical exploration and geology, evaluate favorability of all kinds of ore control factors, set up synthetic information mineralization prediction model for prediction unit with farther dense anomalies, and made resource prediction by numerical theory and delineated prediction targets.1. Based on the collection of geology, geophysics, geochemistry, mine survey and scientific research, we discussed the ore-forming geological conditions, and ore-controlling factors, These work lies a good base for the synthetic information prediction in Sarbulak and its vicinity, and are meaningful for ore prediction and geological survey insimilar regions.About 20 magmatic intrusion bodies of different size and composition can be seen in this region, from basic rock to acid rock. Among them the migmatitic granite body located in Ererqis compressive belt along NW-SE direction and being, consistent with trend of strata, is the biggest,We statistic and analysis the geological, geophysical and geochemical characterizing of 95 faults in studied area, confirmed that there are 42 gold-control faults. Among them, there are 3 gravity faults, 2 aeromagnetic faults, 3 gravity faults with aeromagnetic faults. There are 11 gravity faults of later stage, 16 aerial magnesium faults, 7 gravity with aerial magnesium faults. The total number of early faults is 8, 19%, later faults is 34. This shows that later faults are more important in mine than the early faults.2. Using the theory and method system of SIMP, we delineated mine targets, chose 3 first rank gold targets and 3 second rank ones. In Sarbulak mine we chose 11 first rank gold targets, 3 second rank ones and 5 third rank ones. We also pointed out main types for further work.According to the distribution of gold-containing intrusions, gold anomalies and gold-containing structures, we divide the gold district into 21 units.According to the locations of gold-containing intrusions, faults, scale of gold residual anomaly and anomalies of Au Sb or Au As and so on, we have divided 19 ore exploration targets by fault boundary. The criterion for them are as the followings: (1) the most favor exploration targets are located on the gentle side or two sides of the gold-containing intrusions. (2) First rank gold-containing fault is better than second rank gold-containing fault, and the second rank one is better than the third rank one. Line-loop joining is better than line-line joining. (3) Large-scale residual Au anomaly is better than small-scale one. (4) Assemblages of Au Sb or Au As appears in residual Au anomaies plays an important instructive role. The larger, the anomaly scale, the higher, the superposition, the stronger, the instructive role. (5) Known ore bodies or ore body in target area are instructive for evaluation of the target area and the distribution of the mineralization altered zones also play an important instructive role.The 19 exploration targets can be classified into three ranks, 11 targets are of bestcondition of ore-forming (the number is 4n 5^ 9~17), 3 targets the middle (the number Is 2> 7> 8) and 5 targets are of weak information.3. The research of this paper directly link with field work, the result of metallogenic prognosis can guild us to do mineral prospecting, and the testing results could be used for comprehensive research. This work set up a good example of metallogenic prognosis. After statistics and evaluating, the 21 unites in this area are ranked. On the basis of comprehensive statistics and research, suggestion for further working on the first 6 units was given.4. Comparing with other metallogenic prediction methods, synthetic information metallogenic forecasting uses the regional aeromagnetic, gravity and chemistry explore material more systematic ally and to their maximum extent. With help of the aeromagnetic data and the gravity, navigating magnetism and geology information in the research area, deduced that the hidden foundation, neutral-acidic lithesome, basic-ultra basic litho some in Sarbulak. It is said that the linear structure intersection, the edge of hidden foundation, the contact and estuary of hidden litho some are advantageous to ore-forming of Au and Cu, at the same time, the ore bearing is better because of the great variation and concentrated coefficient of Au in Carboniferous and Devonian, but the ore bearing is worse in simian for its high variation concentrated and low concentrated coefficient. Further more, the ring and line intersect in the fault intersect formality is beneficial to ore forming while the line and line intersect is poor for ore forming.5. Based on the geology, geophysics, geochemistry and the ore controls, we summarized about the mineralization in the area is as follows:(1) Stratigraphy is not meaningful for gold ore body.(2)The known ore bodies are mostly distributed on the sides of gently dipping intrusion, or their ends, which shows the important role to ore body and has the significant indication to find out ore body.(3)The joining of faults constructive line take an important role at the gold mineralization, and loop joining position is more important, not only to the appearance of the bigger ore body, but also to the present of higher grade ores, which has the value to search new ore body.