Abstract:The ijinshan orefield ,a high- sulfide equithermal deposit discovered at first in China,is primary composed by Zijin copper-gold.The porphyry copper (molydenum) deposit,the meso-low-temperature hydrothermal copper deposit,the lower- sulfide epithermal silver(gold-copper) deposit,the volcanic uranium deposit and the high-temperature hydrothermal tungsten(tin) geochemistry abnormity were discovered in its depth and vicinity. From late Jurassic era,it had gone through multiphase-tectonic movement ,multiphase-magmation and mulaiphase-hydrothermal alteration ,and which had resulted in multiphase-mineralization. In this case, this paper points out that the Zijinshan orefield`s various tectonics-fluids-mineralization system is characterized by tectonic structure,body in body,alteded alteration,mineralized mineralization,and it possesses a spatial distribution of deposits characterized by minerlization vertical zoning features, “U、Ag→Au→Au、Cu→Cu→Cu、Mo→W、Sn”and “multi-floor building “ forming deposits modle. The vary metallogenic deposits appear unique distributing pattern, thus constitutes “Zijinshan” metallogenic series and metallogenic modle. Compare with other deposits,the porphyry copper (molydenum) deposit below copper-gold deposit and the high-temperature hydrothermal tungsten(tin) at its vicinity are cognitioned It indicates the new spatiotemporal field in discovering such ore type.,and offeres evidence for further prospecting

Abstract:The data and research indicates that the petroleum mainly is enriching in Yan-CHANG and Jurassic formation, the gas mainly is down Paleozoic Erathem reservoir, the coal mainly occurrences from Carboniferous System to Jurassic formations. The rich geologic and log information and core testing data indicates that the uranium is enriching in Ordovician and Carboniferous-Permian and Triassic and Jurassic and Cretaceous formation. The feature of uranium enriching in deep and shallow is different. The correlation of the high gamma ray abnormal and the uranium abundance in deep layer is marked. The evidence and feature of the structure and fracture indicates that they are developing and play a important role in uranium distributions. The law was researched that the structure movement and depositional environment changing of the basin undergoing decided the features of many minerals. The uranium in the basin is enriched by the oil and gas and coal. The abundance of organic material and the uranium abnormal have the intimately relation.

Abstract:There are several small brittle-ductile sheared zones developed in the in the Permian Qixia limestone in northern Chaohu, which’s width is ranged from a few decades to slightly more than one meter and distributed along the strata bedding. A lot of calcite veins, foliation and sheared flanking folds develop in the violently shear parts. brittle-ductile shearing structures in the sheared zones are extreamly common, such as sheared foliation, S-C fabric, lineation, flanking folds, eye-ball structure, column structure and many other micro sheared structures which of them have not been dealed with up to now. The study reveals that the brittle-ductile shearing zones in the Qixia limestone in northern Chaohu are formed in about 3000 meter depth below the surface and at most less than 5500meters. The underground liquid, expecialy organic acid extrauted by organic matter during its maturation is benefited to the calcite brittle-ductile sheared deformation in the super shallow comdition.

Abstract:The three Gorges reservoir waterdiversion project is a new line of the SouthNorth WaterDiversion Project. The paper studies several major factors which affect the crustal stability in the region. These factors are deepseated structures,tectonic stress fields,fault activity,earthquake activity and rock properties. In order to improve the accuracy and adaptability of evaluating regional crustal stability, with an emphasis on stability of long deep buried tunnels of waterdiversion project on two orders of structural stability and rock mass stability, the authors select dominative conditions which affect regional crust stability as evaluating factors, establish fuzzy evolution model, and fuzzy comprehensive evaluation method. The stability of engineering ground is assessed in terms of structural stability and rock and soil stability using a comprehensive assessment model of fuzzy mathematics. The result shows that the engineering field of the waterdiversion project is of high crustal stability and suitable for building large water diversion projects. Of all the thirty regions, the most unstable region (one) covers an area of 699 km2, accounting for only 1.3% of the total engineering field area (about 52577 km2); relatively stable regions (eight) cover an area of 15826 km2, 30.1% of the total area; stable regions (twenty one) cover an area of 36052 km2, 68.6% of the total area. Three designed water diversion lines were optimized and compared using the crustral stability assessment method, indicating that the middle line is the best.

Abstract:The Chaobei Region of Anhui Province is tectonically located in the eastern part of the lateMesozoic North China Plateau, to east of the Tanlu fault, and in the northern margin of the Lower Yangtze foldthrust belt of the Yangtze Block in the southern Sulu High Pressure and UltraHigh Pressure orogenic belt. Its evolution is constrained by the tectonic setting and characterized by superimposed faulting structures consisting of two synclines and one anticline. The structure of this kind and concealed structural deformation may attribute to multiphase defomations, including three folding stages in Indosinian and three thrusting related. The firststage deformation is characterized mainly by low angular detachment planes of Lower Siliurian Gaojiabian Formation and the related local faults and faultdetatched folds. The secondstage resulted in the tectonic pattern containing one folding system (two synclines and one anticline) and one NWSEstriking imbricated thrusting complex. The thirdstage is characterized by NWWstriking open folds and lowerangle thrust. During the middle Yanshanian, one NSstriking fold superposed onto the earlier structures. However, the late Yanshanian NWtrending faulting is characterized by NEdipping dominotype normal fault complex in this area, which regionally controls Upper Creatacious depocenter. The regional correlation shows that the Indosinian deformation is in agreement with the SuluDabie deformation, indicating that they are related to exhumation mechanism of the HPUHP rocks in the DabieSulu orogen and that the Yanshanian deformation dynamics is probably related to both the subduction of the PaleoPacific Plate and escaping structure in eastern China.

Abstract:By using the Leibo area as an example, a basic understanding of the latest deformation style in the Mabian seismictectonic belt has been abtained, based on the geologic and geomorphologic survey, and combined with trench technology and dating. The research results demonstrate the existence of an NEEtrending Leibo fault zone in the Leibo area. A faulted stratrum age is about 40 ka. The fault is a dextrak slip and active in latepleistocene. The NNWtrending Manao fault exposes the Quaternary weathering crust, from which two displacement events can be recognized. Their displacement offsets are 0.5m and >0.7m in sections respectively. A steep plane of the offset provides the evidence of horizontal sinistral slip. The NEE and NNW trending faults in the Mabian seismic zone belong to one pair of conjugate shear faults in the modern tectonic stressfield, representing the latest deformation style of the Mabian seismotectonic zone. The disastrous earthquakes in the Mabian seismotectonic zone are characterized by moderate magnitudes, high frequency and weak zoning, and these are in agreement with features of earthquakes caused by conjugate tectonic frame. The Mabian seismotectonic zone is situated at the southern section of the eastern margin of the Tibetan Plateau. The research further shows that a ductile flow model in the middlelower crust, controlled by gravity, can give a reasonable explanation about the active habits of faults, including the Dalianshan fault zone, Anninghe fault zone and Xianshuihe fault zone. With a continuous flow of the middlelower crustal material inside the Tibetan Plateau, the Plateau boundary spread gradually outwards and a new boundary formed. Thus the boundary represents a newlyformed seismotectonic belt.

Abstract:Crustal deformation history in the Jianchuan basin of northwestern Yunnan Province since the Tertiary is studied through analyses of strata, folding and variations of faulting modes. The result shows that a nearly NS trending fold formed in the Baoxiangsi group (Eb), with dextral thrust on the main fault along the NNE directed basin rim in the early Eocene. Since the Miocene, the fold in the Shuanghe group (N1s) stroke in NE when the main fault on the basin rim changed into sinistral thrust. After the Pliocene (N2Q), the Jianchuan block experiences extension and rifting, with differential crust uplift and normal faulting on the basin rim, as well as intrusion of the upper Pliocene trachyte through fissures. The fission track (FT) dating indicates that the folded Shuanghe group (N1s) is of age15.8±1.8Ma, sinistral thrust on the main fault of the basin rim occurred at 5.4±1.1Ma, later faulting at 1.6±0.7Ma, and the ages of uplifted Jianchuan group (N2j) and upper Pliocene trachyte fall in 2.4±0.85Ma~3.1±.5Ma. These data suggest that the nearly EW directed compression on the basin was at 15Ma B.P, NW directed compressive motion occurred in 15~5.4Ma B.P., and the later extension and normal faulting began 5.4Ma B.P. and culminated in 1.5~1.6Ma B.P. It means that the crustal deformation of the study area was nearly EW directed compression in the early Eocene, changed into NW directed compression in the Miocene, and transformed into extension and rifting since the Pliocene. Such a process of crustal deformation is presumably associated the push of the Indian plate, uplift of the Tibetan plateau and southeastward flow of the plateau material.

Abstract:A Subsection Mean Method (SMM) for relation analysis of land surface temperature field (LSTF) and the faults is proposed. The method assumes that the center of fault zone is known. According to the distance from the fault zone, a certain region is equally partitioned. Average LST and distance in each equallydidivded zone are calculated, and then the data are plotted in the correlation diagram of the mean LST verse the mean distance. In the case study of JiangshanShaoxing fault between Jinhua and Quzhou of Zhejiang Province, this paper describes the relations between LSTF and deep large faults based on the images of the Landsat 7 ETM and thermal infrared remote sense. The results indicate that LSTF is distinctly related to the JiangshanShaoxing fault, ChangshanLizhu fault and QiuchuanXiaoshan fault and regionally, shows a stable change feature. Within the area effected by each fault, the closer the distance to the fault, the higher is the LST; The NWtrending Chun'anWenzhou fault and the EWtrending QuzhouTiantai fault are situated in the transitional zone of LST, while areas on both sides of the two faults may belong to different LSFTs.

Abstract:The Huangshan granites are characterized by high SiO2 ( >75 %), low calcium CaO (0.51 ~ 0.86 %), poor MgO, relatively high alkali and high FeO*/MgO ratio (8.28 ~ 87.20). Geochemical analysis shows that the granites is extremyly depleted in Ba, Sr, and Eu (δEu = 0.01 ~ 0.13), rich in strong incompatible elements such as Rb, Th and U. The contents of high field strong elements such as Zr, Nb, Y and Ga are relatively high. Major and trace elements signature indicates that the Huangshan granites belong to Atype. The tetrad effect is presence in the granites' REE distribution diagrams. Some trace elements behavior can't be controlled by charge and radius of ions, such as, extremely low ratios of K/Rb and Zr/Hf and distinctly high K/Ba. The features can be observed only in highly evolved magma which strongly interactes with hydrothermal fluid. Compared with the calcalkaline Taiping granitoids, the highly evolved Huangshan Atype granites have relatively low initial 87Sr/86Sr ratios (0.707，but 0.710 for the Taiping granitoids) and high εNd(t) values (-4.45 ~ -4.87，but -6.21~-6.40 for the Taiping granitoids). The twostage model ages (TDM2) for the Huangshan granites is 1.24 ~ 1.33Ga, clearly smaller than the model ages of the Taiping granitoids (1.44 ~ 1.45Ga), implying that a great deal of asthenospheric mantle material entered into the parent magma of the Huangshan granites. It is concluded that the change from the calcalkaline Taiping granitoids to the alkaline Huangshan granites refers the Mesozoic lithospheric thinning of the southeastern Yangtze craton.

Abstract:The late Indosinian Nanyili granite, exposing in the southern margin of the Bikou area, was analyzed and discussed so as to better understand its genesis, oreforming material source and structural setting. The results show that the Nanyili granite is high in SiO2(71.29％～73.05％) and Al2O3 contents, slightly low ratio of FeO/(FeO+MgO), has A/CNK ratios ranging 1.07～1.11. All these characteristics suggest sthat it belongs to typical peraluminous granite. The ∑REE ranges from 56.80×10-6to 89.12×10-6, REE diagram shows rightward incline and obvious negative Eu abnormity. High field strength elements such as Ta、Nb、P and Ti show distinct nagetive anomly while lithophile elements such as Rb and Sr exhibit obvious positive anomalies. Magma source is probably rising and emplacement of partially melt granitic magma dominated by greywacke, which is typical of crustal genesis. With the features of the postcollisional magmatic activity, the Nanyili granite is the product of partially melt crust in such a geologic condition of crustal thickening resulted from the collision between the North China massif and Yangtze massif during the Indosinian. It formed during the transition period from syncollision (compressional) to post collision (extensional environment).

Abstract:The paper studies the chronology and geochemistry of limburgite at Liucheng, Fujian provience, in order to better understand the Cenozoic mantle nature and the geotectonic setting of Fujian. Limburgite is a kind of alkaline ultramafic rock, and formed at 12.6Ma. It is enriched in Mg and Fe, especially LILE and HFSE, and depleted in alkali elements. Nb and Ta shows positive anomalies. The rock is also strong enrichment in LREE and relatively depletion in HREE. The all abovementioned features of trace elements are similar to those of the ocean island basalt (OIB). The trace elements analysis shows that limburgite is the product of partially melting of mantle peridotite and diagenesis did not undergo the crustal contamination. The source mantle shows the HIMU nature.The asthenosphere mantle, the dehydrated ocean shell and remaining the ancient enrichmental mantle had mixed to form the source. The Liucheng limburgite formed in the continental rift. Compared with the Cenozoic basalts, it is suggested that the mantle compositons of southeastern China are characterized by multiple mantle end components.

Abstract:Lithology of the Majiajie Group，located in eastern Heilongjiang Province, is dominated by low metamorphic argillaceous rocks. Major and trace elements analysis shows that content of SiO2 is 61.5%~77.68%，Al2O3 is 9.74%~21.08%，K2O is 2.73%~6.34%，Na2O is 0.1%~2.66%，(La/Yb）N is 6.55~10.79，Eu/Eu* is 0.45~0.64，and （Gd/Yb）N is 1.28~1.94. All these features indicate that the source rock of the Majiajie Group is felsic rocks originating from the postArchean upper continental crust which belonges to continental island arc. The cathodoluminescence images of zircons selected from basal granitic gneiss show that they all have a clear oscillatory zonation and good crystal shape, which indicate they are typical of magmatic origin. The zircon LA ICPMS UPb dating of spots indicates that their 206Pb/238U ages range from 499 to 508Ma and that the weighted mean age of 11 analyzed spots is 504 2Ma. This result indicates the source rock of basal granitic gneiss is middle Cambrian in age while its metamorphic age should be much later than middle Cambrian. Therefore, the Majiajie Group's sedimentation started after Cambrian. The geochemistry of Majiajie Group and geochrolonogy of basal granitic gneiss suggest that the source rock region was probably a stable continental block which was amalgamated by the Jiamusi Blcok and adjacent blocks during PanAfrican period.