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Science Bulletin 2001年第22期46卷 1912-1916页

作者： LIU Jingbo, YE Kai CONG Bolin, Maruyama Shegnori & FAN Hongruiinstitute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, China department of earth and planetary sciences, tokyo institute of technology, 2-12-1 ookayama, meguro tokyo, 152, japan institute of Geology and Geophysics Chinese Academy of Sciences Beijing China department of earth and planetary sciences Tokyo Institute of Technology Meguro Tokyo Japan

The mineral inclusions in zircon from gneisses in ultra-high pressure (UHP) zone of the Dabie Mountains were identified by using a laser Raman microspectrometer. Coesite occurs as inclusions in zircons from all types of gneiss. Other important minerals, such as jadeite, omphacite, aragonite, barite, and anhydrite were also found as inclusion minerals. These discoveries indicate that ( i) gneissic country rocks had metamorphosed at the same time as the enclosed eclogites; and (ii) SO4-2 -bearing fluids were presentin the UHP metamorphic process, which is manifested by occurrence of barite and anhydrite coexisting with coesite.

关键词： Coesite inclusions in zircon from gneisses identified by laser Raman microspectrometer in ultra-high pressure zone of Dabie Mountains,China high

Coesite inclusions in zircon from gneisses identified by laser Raman microspectrometer in ultra-high pressure zone of Dabie Mountains,China

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Coesite inclusions in zircon from gneisses identified by las...

SHRIMP U-Pb Geochronology of Ultrahigh-pressure Metamorphic Rocks of the Dabie Mountains,Central China

中国科学院地质与地球物理研究所2001学术年会

作者： LIU Jingbo~1,YE Kai~1 CONG Bolin~1, Maruyama Shegnori~2 & FAN Hongrui~1 1.institute of Geology and Geophysics,Chinese Academy of sciences, Beijing 100029,China 2.department of earth and planetary sciences,tokyo institute of technology, 2-12-1 ookayama,meguro tokyo,152,japan

The mineral inclusions in zircon from gneisses in ultra-high pressure(UHP) zone of the Dabie Mountains were identified by using a laser Raman microspectrometer. Coesite occurs as inclusions in zircons from all types of *** important minerals,such as jadeite,omphacite, aragonite,barite,and anhydrite were also found as inclusion *** discoveries indicate that(i) gneissic country rocks had metamorphosed at the same time as the enclosed eclogites;and(ii) SO -bearing fluids were present in the UHP metamorphic process,which is manifested by occurrence of barite and anhydrite coexisting with coesite.

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Continental Dynamics 1998年第Z1期 74-87页

作者： S. MARUYAMA, H. TABATA department of earth & planetary sciences, tokyo institute of technology, tokyo 152, japan A. P. NUTMAN Research institute of earth & planetary sciences, Australian National University, Canberra, Australia T. MORIKAWA

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｔｈｅｒｍａｌｈｉｓｔｏｒｙｏｆｔｈｅＥａｒｔｈｈａｓｂｅｅｎｄｉｓｃｕｓｓｅｄｆｒｏｍｓｅｖｅｒａｌｄｉｆｅｒｅｎｔｖｉｅｗｐｏｉｎｔｓ，ｉｎｃｌｕｄｉｎｇｔｈｅｏｒｅｔｉｃａｌ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｔｈｅｒｍａｌｈｉｓｔｏｒｙｏｆｔｈｅＥａｒｔｈｈａｓｂｅｅｎｄｉｓｃｕｓｓｅｄｆｒｏｍｓｅｖｅｒａｌｄｉｆｅｒｅｎｔｖｉｅｗｐｏｉｎｔｓ，ｉｎｃｌｕｄｉｎｇｔｈｅｏｒｅｔｉｃａｌｃｏｎｓｉｄｅｒａｔｉｏｎｓ（ｅ．...

关键词： SHRIMP Ages Zircons Ultrahigh P Metamorphism Dabie mountains China

DISCOVERY OF THE OLIGO-MIOCENE RODENTS FROM WEST japan AND THEIR GEOLOGICAL ANDPALEONTOLOGICAL SIGNIFICANCE

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古脊椎动物学报(中英文） 1995年第4期 320-329页

作者： TAKAFUMI KATO(department of earth and planetary sciences, Kyushu University, Fukuoka 812-81,japan)HIROYUKI OTSUKA(institute of earth sciences, Faculty of science, Kagoshima University, Kagoshima 890, japan)

New rodent fossils found in the Oligo-Miocene sedboents in Kyushu, West japan, are identified to the following four taxa: 1) Castoridae gen. et sp. indet. A, 2) Steneofiber sp. from the Late Oligocene Sasebo Group; 3) Castoridae gen. et sp. indet. B; 4) Diatomys shantungensis from the Early to Middle Miocene Nojdria Group. Studies of two specimens identified to the family Chstoridae gen. et sp. indet. A and B indicate that they are large beavcrs with the skull of nearly same sise as Trogontherium that holds enamel of longitudinally grooved indsors. Resemblance in sise and features of the incisor enamel indicates that these specimens could be of the same genus. Furthermore, it is known that Steneofiber is a cosmopolitan genus, however, it has not been found in the Late Oligocene in East Asia. The occurrence of Diatomys shantungensis, on the other hand, strongly suggests that the late Early Miocene mammls from japan and the East *** to the same faunal province in Easl Asian margin.

关键词： Kyushu japan Late Oligocene-Early Miocene Rodents

Carbon isotopic characteristics and their genetic relationships for individual lipids in plants and sediments from a marsh sedimentary environment

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Science China earth sciences 2005年第8期48卷 1203-1210页

作者： DUAN Yi1, ZHANG Hui1, ZHENG Chaoyang1, WU Baoxiang1 & ZHENG Guodong2 1. Lanzhou institute of Geology, Chinese Academy of sciences, Lanzhou 730000, China 2. department of earth & planetary System Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-85japan 1. Lanzhou institute of Geology Chinese Academy of Sciences 730000 Lanzhou China 2. department of earth & planetary System Science Graduate School of Science Hiroshima University 739-8526 Higashi-Hiroshima Japan

The carbon isotopes of individual lipids in herbaceous plants and tree leaves in Ruoergai marsh were measured by the GC-IRMS analytical technique in order to understand the inherent relationships of carbon isotopes between sedimentary and plant lipids from typical marsh environment. The analytical results show that the carbon isotopic compositions of n-alkanes in different kinds of plants differ significantly. Mean δ 13C values of n-alkanes in her-baceous plants (?32.2‰―?36.9‰) are 3.3‰ lower than those in woody plant (?27.2‰― ?35.0‰). The carbon isotopic compositions of fatty acids in organisms (?30.3‰― ?36.2‰) are very similar to those of n-alkanes and the δ 13C values for unsaturated fatty acids are within the range of those for saturated fatty acids. The differences in δ 13C values between plant lipids are obvious and range from 2.4‰ to 7.8‰. It is observed that the carbon isotopic compositions of sedimentary lipids are closely related to those of plant lipids. The carbon isotopic compositions (?27.0‰―?36.9‰) of n-alkanes, ≥C16 fatty acids, n-alkanols, sterols and n-alkanones in the sediments are similar to those of plant lipids and the carbon isotopic compositions of short-chain sedimentary lipids are similar to those of long-chain sedimentary homologues. These indicate that the sedimentary lipids are derived from high plants. However, the δ 13C values of C14:0 and C15:0 fatty acids in the sediments are lighter than those of the same carbon number saturated homologues in plants, reflecting the genetic features partially derived from bacteria. These data provide scientific evidence for carbon isotope-applied research of individual lipids.

关键词： marsh environment, plants, sediments, individual lipids, carbon isotopic compositions, genetic relationships.

Genesis of continental seismogenic zone and a new fault zone model

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Chinese Science Bulletin 2000年第20期45卷 1886-1892页

作者： LIU Junlai & M. Shimada1. department of earth sciences, Changchun University of Science and technology, Changchun 130026, China 2. RCEP, Disaster Prevention Research institute, Kyoto University, Uji, Kyoto, 611-0011, japan Correspondence should be addressed to Liu Junlai i department of earth sciences Changchun University of Science and Technology Changchun China RCEP Disaster Prevention Research Institute Kyoto University Uji Kyoto Japan

Experiments were conducted repeatedly on Mannari granite under different temperature and confining pressure conditions. Systematic micro- and submicro-structural and mechanical analyses of granite samples deformed under 1.5 GPa (confining pressure), at 25 ℃-650 ℃ temperatures and at 2×10-6s-1 strain rate show the brittle-ductile deformation microstructures and microstructural associations similar to those observed in naturally deformed crustal rocks and minerals. Brittle fracturing and crystalline plasticity co-exist and react with each other in the brittle-ductile transition domain of the continental lithosphere. The interaction between the different mechanisms in the transitional domain results in the variation of anomalous strength values, which may best explain the genesis of the continental seismogenic zone. A new fault zone model is proposed on the basis of detailed micromechanical and microstructural analyses.

关键词： granite experimental rock deformation continental seismogenic zone fault zone model.

Pole to Equator Temperature Gradient for Coniacian Time,Late Cretaceous:Oxygen and Carbon Isotopic Data on the Koryak Upland and Hokkaido

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Journal of earth Science 2012年第1期23卷 19-32页

作者： Yuri D Zakharov Olga P Smyshlyaeva Alexander M Popov Tatiana A Velivetskaya Tamara B Afanasyeva Kazushige Tanabe Yasunari Shigeta Haruyoshi Maeda Far Eastern Geological institute Russian Academy of Sciences Far Eastern Branch Geological institute University of Tokyo department of Geology National Museum of Nature and Science department of earth and planetary sciences Graduate School of Science

The purpose of this study was to estimate the Coniacian latitudinal thermal gradient in the Northern Hemisphere. Both hemipelagic （ammonoids） and benthic （brachiopods and bivalves） δ18O and δ^13C records were used. They originated from Coniacian shallow-water sequences across a wide range of paleolatitudes, from the Koryak upland （northern Kamchatka, Russian Far East） in the north, to Hokkaido （japan） in the south. Among Coniacian ammonoids, both migrants from Hokkaido living in high latitudes （Kamchatka） and endemic forms dwelling in middle-low latitudes （Hokkaido） indicate seemingly close optimal growth temperatures. Nevertheless, certain differences in climatic conditions, prevailing during high-latitude coldest seasons, undoubtedly provoked growth cessation in some groups of ammonites. Our isotopic study suggests latitudinal temperature changes of only 0.12 ℃ per degree of latitude for the Northern Hemisphere in Coniacian times, while the average annual temperature in North Kamchatka seems about 3.3 ℃ lower than that in Hokkaido.

关键词： Coniacian oxygen and carbonisotope paleotemperature Kamchatka Hok-kaido.

Degree One Loading by Pressure Variations at the CMB

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Journal of earth Science 2013年第5期24卷 736-749页

作者： Ming Fang Bradford H Hager Weijia Kuang department of earth Atmospheric & Planetary Sciences Massachusetts Institute of Technology planetary Geodynamics Laboratory NASA Goddard Space Flight Center

Hemispherical asymmetry in core dynamics induces degree-1 pressure variations at the core mantle boundary （CMB）, which in turn deforms the overlaying elastic mantle, at the same time keeps center of mass of the whole earth stationary in space. We develop a systematic procedure to deal with the degree-1 CMB pressure loading. We find by direct calculation a surprisingly negative load Love number h1=-1.425 for vertical displacement. Further analysis indicates that the negative hi corre- sponds to thickening above the positive load that defies intuition that pressure inflation pushes over- laying material up and thins the enveloping shell. We also redefine the pressure load Love numbers in general to enable comparison between the surface mass load and the CMB pressure load for the whole spectrum of harmonic degrees. We find that the gravitational perturbations from the two kinds of loads at degrees n〉l are very similar in amplitude but opposite in sign. In particular, if the CMB pressure variation at degree 2 is at the level of -1 hpa/yr （1 cm water height per year）, it would perturb the variation of earth＇s oblateness, known as the J2, at the observed level.

关键词： Degree One Loading by Pressure Variations at the CMB MRSP

Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone

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Science China earth sciences 2005年第7期48卷 886-899页

作者： LIN Wei1, 2, Faure Michel3, WANG Qingchen1 & Arnaud Nicolas4 1. LTE, institute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, China 2. department of earth and planetary sciences, Graduate School of Science, Nagoya University, japan 3. ISTO, UMR CNRS 6113, Batiment Géosciences, Orléans Université d’Orléans, 45067 Orléans Cedex 2, France 4. UMR 6524 "Magmas et Volcans", 5 Rue Kessler, 63000 Clermont-Ferrand, France LTE Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China department of earth and planetary sciences Graduate School of Science Nagoya University Japan ISTO UMR CNRS 6113 Orléans Université d'Orléans 45067 Orléans Cedex 2 France UMR 6524 Magmas et Volcans 63000 Clermont-Ferrand 5 Rue Kessler France

The Beihuaiyang metamorphic zone was formed by the Early Mesozoic collision of the North and South China Blocks. It consisted of the Foziling and Luzhenguan complexes and was thought to have never afforded a deep subduction. A similar feature of the deformation in the Dabieshan UHP metamorphic rocks implies that these different tectonic units share the same geodynamic background. The early stage of deformation can be preserved on account of their relatively shallower subduction than that for UHP rocks. On the basis of an analysis of the geo- logical structure and geochronological results, five deformational stages have been recognized: a D1-Early compressional deformation which represents the continental subduction; a D2-Early exhumation deformation producing a syn-convergence exhumation; a D3-Main deformation, represented by an exhumation deformation with Late Triassic age; a D4-Doming and its margin extensional gravity collapse deformation and finally a D5-regional extensional deformation of Cretaceous that was mostly introduced by the migmatization and plutonism.

关键词： Beihuaiyang metamorphic zone geometry kinematic polyphase deformation tectonic evolution.

Paleomagnetic Polarity Research of Paleobiology Boundary(Bed27) of Meishan,Changxing,Zhejiang Province

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Journal of earth Science 1998年第3期17卷 62-63页

作者： Zhu Yanming Faculty of earth sciences, China University of Geosciences, Wuhan 430074 Morinaga Hayao department of Geology, Faculty of sciences, Himeji institute of technology, Himeji 672 22, japan

The magnetostratigraphic sampling was carried out respectively in the inside part (14 cm away from the section surface along the bed) and outside part (5 cm away from the section surface along the bed) with no interval at the same bed (Bed 27) which the paleobiology boundary (PBB) of A and D sections lies in of Meishan, Changxing. This research shows that the deep samples suffered slighter secondary magnetization than the shallow ones did and in comparison with D section ’s samples, the samples of A section sustained slighter secondary magnetization. On the bases of the data, the secondary magnetization influence of which is relatively weak, this paper obtains the conclusion that the bed, in which the paleobiology boundary lies, lies within the reverse polarity subzone.

关键词： magnetostratigraphy secondary magnetization paleobiology boundary Meishan Changxing Zhejiang Province.