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Chinese Science Bulletin 2001年第4期46卷 330-333页

作者： CHEN Nengsong, SUN Min, ZHANG Kexin & ZHU Yunhaifaculty of earth {2.,{3. University of Geo{2., wuhan 43.074,{3. Department of earth {2., The University of Hong Kong, Hong Kong SAR,{3. faculty of earth {2. China University of Geosciences Wuhan China Department of earth sciences The University of Hong Kong Hong Kong SAR China

Single-grain zircon U-Pb and amphibole 40Ar-3.Ar dating have been conducted on a deformed and metamorphosed diorite in the East Kunlun Orogenic Belt, which intruded into the middle Proterozoic Kuhai Group exposed in the south of Xiangride region, Dulan County, NW Qinghai Province. The zircon gives a concordant U-Pb age of (446.5±9.1) Ma. The amphibole yields Ar plateau age of (488.0±1.2. Ma and an isochronal age of (488.9±5.6) Ma. Age results of both stepwise released Ar and conventional K-Ar analysis are remarkably higher than that of zircon U-Pb, suggesting that the amphibole contains excess argon and the amphibole plateau age cannot be taken as the timing of metamorphism or deformation. The zircon age is interpreted to be crystallization age of the diorite pluton, which suggests that an Early-Paleozoic magmatic zone indeed existed in the East Kunlun Orogenic Belt stretching along the region south to the Golmud, Normuhong and Xiangride.

关键词： East Kunlun Orogenic Belt metadiorite geochronology excess argon.

Characteristics of Albaillella (Albaillellarian,Radiolarian) Fauna from Guadalupian to Lopingian Series in Permian,South china

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Journal of china University of Geosciences 2003年第4期14卷 314-320页

作者： Sun Dongying Xia Wenchen faculty of earth {2.,{3. University of Geo{2., wuhan 43.074 faculty of earth {2. China University of Geosciences Wuhan 430074

On the basis of establishment of radiolarian biostratigraphy and conodont biostratigraphy, a radiolarian Albaillella fauna in the transitional environment from Guadalupian to Lopingian Series in Permian was found at a pelagic chert section in southeast Guangxi, South china. Radiolarian Albaillella is one of the most sensitive biology to the transitional environment. The Albaillella fauna shows an ecological evolutionary process from Guadalupian to Lopingian: declined stage-recovery stage-flourishing stage. The study of characteristics of the Albaillella fauna in the transitional environment may provide more information, not only for the subdivision and correlation of a high-resolution biostratigraphy, but also for influence of radiolarian Albaillella fauna on the pre-Lopingian mass extinction.

关键词： Permian Guadalupian-Lopingian Series transitional environment radiolarian Albaillella fauna.

Sequence of Ductile Shear Zones in UHP Metamorphic Province with in Dabie Massif,china

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Journal of earth Science 1998年第3期17卷 3-9页

作者： Suo Shutian Zhong Zengqiu faculty of earth {2.,{3. University of Geo{2., wuhan 43.074

Structural studies in the Dabie massif show that distribution of strain is extremely heterogeneous and illustrates the pattern of deformation partitioning in the ultra high pressure (UHP) metamorphic province on all scales. Based on the field structural analysis along with microstructural observation, at least five widespread episodes of ductile shear zone systems are identified by using geometric, kinematic and rheological indicators and they constitute a shear zone sequence in the UHP metamorphic province within the Dabie massif (DM), china. Each shear zone system, for example, the UHP eclogite facies shear zone system in the sequence, exhibits its own features including geometric styles, mineral assemblages, metamorphic pt conditions and deformation regimes during the formation of such shear zone system. Detailed macro and micro scopical features of different episodes of the shear zones are given with respect to mechanism of strain localization and deformation partitioning. The tectonic significance during the creation and exhumation of the UHP metamorphic rocks is evaluated briefly, as well. It is argued that the ductile shear zones in the UHP metamorphic province play an important role in the Dabie mountain building geodynamic process.

关键词： ductile shear zone UHP metamorphic province exhumation deformation partitioning Dabie massif.

Mass and Energy Transportation in Ore-Forming Processes of Sulfide Deposits in Tongling District

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Journal of earth Science 1999年第4期18卷 299-304页

作者： Cen Kuang Yu Chongwen(faculty of earth {2.,{3. University of Geo{2., wuhan 43.074) faculty of earth {2. China University of GeosciencesWuhan 430074

Based on dynamics of heat conduction, fluid flow caused by heating and chemical material transport induced by fluid flow, temperature and stream fields of fluid flow in ore-forming processes of Cu-Au sulfide in the Tongling district deposits was modeled and analyzed. It is shown that: (1) Mass and energy flow caused by fluid flow is key problem of kythrothermal ore-forming processes; the heating from magma intruded is basic power for driving fluid flow. (2. occurrence of pluton, different chemical property and porosity of wall rocks and infiltration restrict the specifically field of precipitation for ore-forming ***, the dissolution and precipitation field for ore-forming material in deposit can be forecasted. (3. Iron and sulfur material comes mostly from sandstone formation of Wutong Group, which contains pyrite and high porosity. The cataclastic dolomite interlayered in sandstone and limestone is a favorable place for ore accumulating. The difference of chemical property between sandstone and dolomite forms a favorable interface for ore-forming processes.

关键词： heat conduction mass transportation fluid path-line streamline

Diagenesis and Restructuring Mechanism of Oil and Gas Reservoir in the Marine Carbonate Formation,Northeastern Sichuan:A Case Study of the Puguang Gas Reservoir

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Acta Geologica Sinica(English Edition) 2009年第6期83卷 1173-1181页

作者： DU Chunguo1, 2. WANG Jianjun1, ZOU Huayao2. ZHU Yangming3.and WANG Cunwu4 1 Research Institute of Petroleum Exploration and Development, Beijing 10003., china 2.Petroleum University of china, Beijing 102.49, china 3.Department of earth Science, Zhejiang University, Hangzhou 3.002., china 4 faculty of earth Resources, china University of Geo{13., wuhan 43.074, china Research Institute of Petroleum Exploration and Development Beijing 100034 China Petroleum University of china Beijing 102249 China Department of earth Science Zhejiang University Hangzhou 310027 China faculty of earth Resources China University of Geosciences Wuhan 430074 China

Based on the technology of balanced cross-section and physical simulation experiments associated with natural gas geochemical characteristic analyses, core and thin section observations, it has been proven that the Puguang gas reservoir has experienced two periods of diagenesis and restructuring since the Late Indo-Chinese epoch. One is the fluid transfer controlled by the tectonic movement and the other is geochemical reconstruction controlled by thermochemical sulfate reduction (TSR). The middle Yanshan epoch was the main period that the Puguang gas reservoir experienced the geochemical reaction of TSR. TSR can recreate the fluid in the gas reservoir, which makes the gas drying index higher and carbon isotope heavier because C2. (ethane and heavy hydrocarbon) and 12. (carbon 12.isotope) is first consumed relative to CH4 and 13. (carbon 13.isotope). However, the reciprocity between fluid regarding TSR (hydrocarbon, sulfureted hydrogen (H2.) , and water) and reservoir rock results in reservoir rock erosion and anhydrite alteration, which increases porosity in reservoir, thereby improving the petrophysical properties. Superimposed by later tectonic movement, the fluid in Puguang reservoir has twice experienced adjustment, one in the late Yanshan epoch to the early Himalayan epoch and the other time in late Himalayan epoch, after which Puguang gas reservoir is finally developed.

关键词： diagenesis and restructuring mechanism marine carbonate formation thermochemical sulfate reduction Puguang gas reservoir

Multi-Layered Low-Angle Ductile Detachment System in Dabie-Sulu UHPM and HPM Belts, china

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Journal of earth Science 1999年第3期18卷 187-193页

作者： Suo Shutian Zhong Zengqiu(faculty of earth {2.,{3. University of Geo{2., wuhan 43.074) faculty of earth {2. China University of Geosciences Wuhan 430074

The present-day observed crustal-scale tectonic style of ultrahigh-pressure metamorphic (UH-PM) and high-pressure metamorphic (HPM ) belts in the Dabie-Sulu region was dominantly formedby extensional processes, postdating the Triassic collision between the Sino-Korean and Yangtze cratons. The extensional structures overprinting the previous structures related to contraction that produced the thickened continental crust of the UHPM and HPM belts, in particular display the typical features of a Cordilleran-type metamorphic core complex, in which at least four regionalscale, low-angle ductile shear zones that constitute a detachment system, are recognized in the Dabie region. In the Sulu region, the extensionaI structures show in the form of small-scale domes or a regional-scale SE-dipping pseudo-monocline. The geometry and the kinematics of tbe detachment zones are briefly described and their significance for the exhumation of UHPM and HPM rocks is discussed. It is iniliated that the subhorizontal crustal-scale extensional flow in the middle-lower crust, under amphibolite- to greenschist-facies conditions, was an important tectonothermal process at 2.0- 170 Ma and the exhumation or the UHPM and HPM rocks was achieved at least in part along multi-layered detachment zones. The regional detachment system has been the main factor enabling UHPM and HPM rocks to be brought from middle-lower crustal levels to middle-upper crustal levels.

关键词： detachment system UHPM and HPM rocks exhumation ductile shear zone,Dabie massif Dabie-Sulu region

Discovery of Jinning Cycle Magmatism in Eastern Part of Eastern Kunlun Orogenic Belt and Its Significance

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Journal of earth Science 2000年第3期19卷 134-139页

作者： Zhu Yunhai faculty of earth {2.,{3. University of Geo{2., wuhan 43.074,{3. Pan Yuanming Department of Geological {2., University of Saskatchewan, Saskatoon, Canada Zhang Kexin faculty of earth {2.,{3. University of G

From the isotopic dating study of gneissic granodiorite, the authors discovered magmatism of the Jinning cycle. Intrusive rocks were formed in the Neoproterozoic, whose Pb Pb ages range from (913.4) Ma to (1 011±4) Ma and U Pb concordia age is (703.15) Ma. The tectonic settings of the rocks are volcanic arc or syn collision. After the formation of the intrusive rocks, these rocks also experienced reconstruction of Caledonian metamorphism. Based on the Ar Ar dating of metamorphic mineral of muscovite, the metamorphic time is determined to range from (3.6.8±0.8) Ma to (3.9.44±3.70) Ma.

关键词： Jinning cycle magmatism Eastern Kunlun orogenic belt Qinghai Province.

Differentiation of Natural and Irradiated Blue Topaz by Cathodoluminescence(CL) Properties

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地学前缘 2009年第S1期16卷 169-170页

作者： Ying Song~(1,2.,Xinqiang Yuan~2.1.faculty of {3. Resources,{2. University of Geosciences(wuhan),wuhan 43.074,{2.. 2.Gemmological Institute,{2. University of Geosciences(wuhan),wuhan 43.074,{2.

Blue colored topaz is one of the most recognized gemstones ***,it is rarely found in the field and the products have been made mostly in laboratory using gamma,neutron and electron irradiation or combinations of these *** of the blue color in topaz remains not well understood, largely due to a lack of nondestructive way in idnetifying the blue *** we report a compari-

关键词： cathodoluminescence natural blue topaz irradiated blue topaz

Petrology of Igneous Rocks in Northern Golpayegan,Iran

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Journal of earth Science 1998年第1期17卷 24-29页

作者： Mohammad Ebrahimi Mohammad Reza HosseinNejad faculty of earth {2.,{3. University of Geo{2., wuhan 43.074

A preliminary study on petrological features of igneous rocks was carried out in northern Golpayegan, Iran, in an area of about 60 km 2. According to the limited available data the sequence of the magma activity could be considered as follows: (1) Precambrian (?) granite connected with a continental continental collision event, (2. Precambrian (?) syenite emplaced at a post continental continental collision environment, (3. Cretaceous volcanic rocks generated by a local extensional system at an active continental margin and (4) Cenozoic doleritic veins generated in a post collision event. Geochemical characteristics of the granitic intrusion show that it originated from crust and belongs to S type one. Syenitic body consists of syenitic affinities ranging from alkali syenite to syenodiorite. These rocks were cut by Cenozoic doleritic veins, which consist of dolerite and olivine dolerite. Both syenite and dolerite are thought to originate from upper mantle but their ages are different. Cretaceous volcanic rocks include basalt, andesite, trachyandesite, trachyte and tuff. They are compositionally alkaline and erupted in a shallow graben basin. Their eruption has been in connection with deep seated faults, which brought out the magma from the source.

关键词： S type granite volcanic rocks syenite dolerite Golpayegan Iran.

Experimental Examination of Velocity-Models in Estimating Gas Hydrate Saturation in Sediments

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地学前缘 2009年第S1期16卷 224-225页

作者： Gaowei Hu~(1,3.,Yuguang Ye~(2.3.,Jian Zhang~(2.3.,Jiasheng Wang~1 1.faculty of {3. {2.,china University of Geo{2.(wuhan),wuhan 43.074,china. 2.Key Laboratory of Marine Hydrocarbon Resources and Environment Resources,the Ministry of Land and Resources,Qingdao 2.6071,china 3.Qingdao Institute of Marine Geology,the Ministry of Land and Resources,Qingdao 2.6071,china

Elastic velocities(v_p and v_s)have been widely used in estimating gas hydrate saturation in void spaces of *** commonly used models are empirical equations or some physically based models,such as Wyllie’s time average,Effective Medium Theory (EMT),Modified Biot-Gassmann Theory by Lee (BGTL),*** equations or models are selective to distinct *** order to evaluate the app-

关键词： gas hydrates saturation elastic velocities models applicability