Abstract:Many doubts still exist on the stratigraphic zonation and correlation in Hefei Basin due to its complex tectonic evolution and the lack of paleontological data. This paper established new stratigraphical sequences based on seismic sequences, evidence from biostratigraphy and lithology and regional tectonic movements. The following are proposed: (1) The Middle Jurassic Zhougongshan Formation and Yuantongshan Formation are classified to Yuantongshan Formation due to their similar lothological, geophysical and paleontological features, which could be respectively taken as the upper and lower parts of Yuantongshan Formation. (2) The Zhuxiang Formation and Heishidu Formation are contemporaneous difference facies in different places, and are in the Upper Jurassic stratum. (3) The Xiangdaopu Formation is the stratum of the Lower Cretaceous. (4) The Dingyuan Formation and Qijiaqiao Formation are contemporaneous difference facies in different places, and are in the Tertiary stratum. These new recognitions provide a guideline for stratigraphical study in Hefei Basin, stratigraphical sequence determination in immature exploration areas and tectonic evolution study of Dabieshan orogen and Tan-Lu fault zone.

Abstract:Based on the SinoFrance cooperated regional tectonics investigation of the middle part of the Caledonian orogenic belt in South China, SEM studies on nanosized particles and dynamic thinshell or films in different kind of ductile shear zones from Neoproterozoic to Mesozoic (ductile cleavage zone, thrust fault zone, extrusion schistose zone, tensile structural zone) in Wugongshan were carried out. Nanosized particles(50~90 nm), grinded and rolled into grinding grains, were found in the ab and ac fabric planes of the high strain zone on the surface of the four types of ductile shear zones. The nanosized particles, lines and layers composed a system of nanosized lineation, foliation and fabrication, which parallels to the visual lineation and foliation. Ultra micro SC foliation and preferred nanosized stress mineral were also found. In addition, the socalled "static friction" is actually the smooth movement, which is formed by slippage pushed by slight friction of nanosized particle layers, and caused by the grinding and rolling of the nanosized particle and composed particle. We discovered that the nanosized particle layers are widely distributed in ductile shear zone, the nanosized textures is comparable to the microsized textures, and the mechanism of ductile shear movement is special. Then, we discussed the system dynamics on the time delay of the Caledonian orogenic belt in South China, since the ductile shear zones were abnormal developed in the superficial structural position of this area.

Abstract:Abstract This work discusses the characteristics of mantle branch structure in western Shandong Province, China,with respect to the distribution characteristics and ages of the regional strata, the development of ring-like and radial faults, the development of gently inclined detachment-slip structures in the axial part, mantle-source magmaticactivities, regional petrology, petrochemistry and isotope geology. The study indicated that the N-W sharply plunged ductile shear zone in the region of western Shandong cuts through the mantle rocks detached from the deep-seated North China mantle sub-plume, hence leading to unloading in response to depressurization and thereafter the formation of anatexis magma. The intense and complete magmatic evolution series not only manifests a variation trend of alkalinity of magma from high to low and its intrusive depth from deep to shallow, but also reflects that the wall-rock alteration shows a general evolution trend from strong to weak. The evolution of mantle structure played an important role in controlling endo-mineralogenesis, accompanied with the rise of the country rocks. As a result, typical mantle branch structures were formed as observed in western Shandong. At the top of the mantle branch structure was developed an obvious detachment-tilt fault block, and some endogenic ores, at the same time, were uplifted onto the shallow levels.

Abstract:Zhangsangou Formation-Complex is located in the northeastern margin of North China Block, which has been previously considered to be Paleoproterozoic metamorphic volcanic-sedimentary sequences, mainly according to its metamorphic grade and regional stratigraphic correlation. Based on our filed investigation and SHRIMP dating, three samples from Zhangsangou Formation-Complex have yielded protolith age of 2517±9 Ma, 2518±7 Ma, 2534±26Ma and metamorphic age of 2439±24Ma、2464±73M and 2433±71Ma, respectively, indicating that it formed in late Neoarchean and reworked in late Neoarchean-early Paleoproterozoic by metamorphinism. In combination with regional geological data, we show that its metamorphic time is likely related to a collisional tectonism between ancient Longgang’s continental bolck and other continental bolck，which indicates that North China Block developed a cratonization in late Neoarchean-early Paleoproterozoic.

Abstract:This study presents zircon U-Pb age of the gneissic granites from the Tengchong block, western Yunnan. Field survey and their petrographic features imply that they should be from magmatic origin, and undergone anatexis later. Of the 24 points on 24 zircon grains, 1 points of inherited ziron yielded 206Pb/238U age of 537.5±5.6Ma, and 2 points of magmatic zircons yielded wtd 206Pb/238U age of 456Ma, and 3 points of anatectic zirons yielded wtd 206Pb/238U age of 117Ma, and 18 points of anatectic zirons yielded Robust (Median) 206Pb/238U age of 66.2+7/-4Ma. It suggested that the granites were formed in the early Paleozoic, and anatexis happened in the Cretaceous probably. The anatexis envent maybe related to the magmatism of the Tethys during the Cretaceous.

Abstract:The Piaotang tungsten deposit is in a well- known tungsten –tin (Mo, Bi) ore–foming district in southern Jiangxi, China. The deposit consists of Piaotang , Muziyuan and Dalongshan blocks. Little work has been done on the ages of ore-formation and related granite in Piaotang for a long time. In this paper, the ages of intrusion of the Piaotang and Muziyuan granites are reported by means of the single grain－zircon U-Pb isotopic method, which are 161.8±1Ma and 153.3±1. 9Ma, respectively. The age of ore –formation for Muziyuan block is determined as 151.1±8.5 Ma ( N=6,MSWD=11.8) by means the molybdenite Re-Os isotopic method. An ore-forming age of 152±10Ma for Piaotang block is also determined by using the quick neutron mobilization 40Ar/39Ar age method of mica from the major ore vein. All these age data indicate that the granite intrusion and related mineralization occurred at the same time or several m.y. apart. These are two common and representative cases for the granite-related tungsten-rare-metal deposits in southern Jiangxi such as the well-known Dajishan tungsten deposit and Taoxikeng tungsten deposit . Data of the paper and ages reported for last year show that the tungsten – tin deposits in Southern Jiangxi Provice belongs to the results of large- scale granitic magmatism and the associated rare-metal minarelization in the middle Yanshanian period of the Mesozoic Era.

Abstract:The Heiniudong copper deposit, situated in the Songpan-Ganzi orogenic belt, is the high copper content deposit which is located in the Jianglang metamorphic core complex. The 40Ar/39Ar plateau age of biotite is (136.43±0.77 Ma ), which shows that the Heiniudong deposit was formed in Middle Yanshannian periods. The mineralization characteristics and metallogenic epoch of Heiniudong deposit is the same with the Liwu deposit in the east of the Jianglang metamorphic core complex. We conclude the mineralization of the two copper deposit is related to the granitoids which formed the metamorphic core complex belt in the Songpan-Ganzi terrane. This discovery is of great significance both in theory and practice for finding copper deposits in the region.

Abstract:Located in the ZhaxueYaguila mining area, Nyainqentanglha Range, Tibet, the Sharang deposit is the first porphyry type molybdenum deposit, which has been detailed investigated. It is shown by preliminary survey that the reserves of molybdenum is very large. For the purpose of finding out whether there are mineralization movements during main IndianAsian collision period (41~65Ma) in the Nyainqentanglha mineralization belt, seven molybdenite samples of YaguilaDongzhonglaSharang mining area were selected to do the ReOs dating. The 187Re and 187Os content are 22.75~46.66（μg/g）and 19.98~40.32（ng/g） respectively, and the 187Re content of the molybdenite is high. The ReOs dating yield a weighted average model age of 51.57 Ma to 52.69 Ma, which is in a narrow range, and an isochrone age of 51±1.0Ma（MSWD=0.55）.The results indicate that there are large scale mineralization movements which is related to the underplating of magma (from 47.0Ma to 52.5Ma(Eocene(about 50Ma)) and the volcanic event(from 43.93Ma to 53.52 Ma) (leads to the forming of the linzizong group pana formation) during the main IndoAsian collision period in the Gangdese belt. It is also proved that the porphyry type molybdenum deposit in the Sharang mining area formed during early Eocene, and the skarnhydrothermal vein type PbZnCuAg(Mo) deposit which is located about four kilometers away from the granite porphyry of Sharang deposit may also form at the same time.

Abstract:Geochemical Abnormality is the basic resource of the evaluation of mineralization prospect and mineralization type. Based on the method and principle of the tracing of the source of mineralization material from the stable isotope, and set the composition of Sulfur isotope in the surrounding rock and mineralization body of the different drill holes which from two testing regions named Wunugetushan and Kenshan as our researching target, otherwise we bring Sulfur isotopic indexes into the researching of the cause of geochemical abnormality. As our prediction, we find some obvious characters as follow. First the related source of Sulfur element in the Cu mineralization and Cu abnormality from different testing regions are primarily unanimous, which indicates that the application of the composition of Sulfur isotope in evaluating the cause of geochemical abnormality is feasible. Second the Sulfur isotopic value in Kenshan testing region is higher than Wunugetushan that may be caused by the later period hydrothermal fluids in these area，So some geological exploration and arrangement should be forced on hydrothermal deposit.

Abstract:Based on data of Saishitang copper mining area, it proved that there have orebearing porphyries and peripheral dike swarm. The orebearing porphyries are Calcalkaline-highK Calcalkaline-Shoshonitie, coexistence with adakitelike rocks, the ISr (0.7060～0.7086) is similar to the basic rocks and enclaves of later Ttriassic in east Kunlun area, 143Nd/144Nd(0.512226~0.512350) is closed to the adakitelike rocks which formed by basaltic lower crustal melting. The porphyries have a relative with the mantlederived magma from the enrichment mantle II，and the metallogenic background is related to the magmatic underplating at later Triassic in east Kunlun area. The shallowseated phase of orebearing intermediateacid stock are living high level with the dike swarm and subvolcanic rock. There have classical porphyritic mineralized alteration with centered orebearing porphyries. The mineralization has several stages and orebearing mainly of porphyries, meanwhile including of skarns, vein rocks, apophysis and breccia. Although we have found few porphyries currently, and can not completely know their characteristics, yet the thick and big porphyry is an important characteristics which can not be ignored. Porphyrytype is symbiosis with skarntype and hydrothermaltype, which have the characteristics of porphyry metallogenic series. Compared with the porphyry copper ore deposit in the world, it believed that the gensis of Saishitang copper deposit is a porphyry superposition compound ore deposit.

Abstract:Isothermal adsorption experiments of pure CO2 and CH4 on different coals in rank (the No.11 Coal from the Linnancang Mine and the No.9 Coal from the Majiagou Mine) from the Kailuan Coalfield of Hebei Province, China, have been studied. Four different models (Langmuir, BET, DR, and DA) were used to fit the experimental data of CO2 and CH4 adsorption and their fitting degree were investigated. The results showed that the adsorption capacity of the Majiagou coal（Ro, ran=1.21%）is higher than that of the Linnancang coal (Ro, ran=0.58%). The adsorption capacity of CO2 is higher than that of CH4 on the same coal under the same pressure. The adsorption isotherms of pure CO2 and pure CH4 on the Majiagou coal can be classified as Type I and their fitting errors of curves are very weak; thus the experimental data can be presented using the Langmuir isotherm. However, the adsorption of Linnancang coal is more complicated, and can be presented using DA model because of its minimum error. Monolayer adsorption occurs during the adsorption of pure CO2 and pure CH4 on the No. 11 Coal and that of pure CH4 on the No. 9 Coal.

Abstract:Coal basin of Northern Zhangjiakou formed earlier in the middle Jurassic, Mesozoic. Before the Mesozoic, the crust of this area was in a longterm stable shield tectonic status. The shield was activated in later early Jurassic. The coal basin initially formed in early middle Jurassic. Xiahuayuan coalbearing strata developed in some intermountain basins. The author analysis the exploration results and the coal occurrence of this area, and draw a conclusion that the early middle Jurassic coal basin mainly formed in the intersectional angle tectonic region of several ancient lands and tectonic belts with different directions. Xiahuayuan CoalBearing Formation was deposited in an environment with intense hydrodynamic conditions and fast sedimentation rate of terrigenous clastic materials. Minable coalbed mainly enriched in submargin of basin, privileged site and front delta at distal end of alluvial fans, or relatively stable sedimentary environment among sectoral diffluence chanels. Coalbearing strata and coal seam were mainly kept in the tectonic environment with weak reformation, relatively stable or slow sedimentary rate. Based on the new understanding of above, the author presents several predicting area of resources and enlightens the future reconnaissance and coalexploration.