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Petrogenesis and significance of early Yanshanian syenite-granite complex in eastern Nanling Range

Science China Earth Sciences 2005年第7期48卷 912-924页

作者： CHEN Peirong1, ZHOU Xinmin1, ZHANG Wenlan1, LI Huimin2. FAN Chunfang1, SUN Tao1, CHEN Weifeng1 & ZHANG Min1 1. State Key Laboratory of Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 2.0093. China 2. Tianjin Institute of geology and Mineral {2., China Geological Survey, Tianjin 3.0170, China State Key Laboratory of Mineral Deposits Research Department of Earth Sciences Nanjing University Nanjing 210093 China Tianjin Institute of geology and Mineral resources China Geological Survey Tianjin 300170 China

In the eastern Nanling Range there exists the early Yanshanian syenite-granite assemblage. A representative example is the Pitou-Tabei complex composed of the Tabei syenite pluton and the Pitou syeno.ranite pluton in southern Jiangxi Province. U-Pb zircon dating yields ages of 188.6±2.2.Ma for the Tabei pluton and 186.3.1.1 Ma for the Pitou pluton. The Tabei syenite is characterized by relatively low SiO2.content (62.40% - 68.7{2.), high alkalis (K2.+Na2. = 10.{2.%-11.96%), low percent K2./Na2. ratios (0.{2.-0.93., metalumino.s fea- ture (A/CNK = 0.80-1.00), enrichment in LILE (Rb, Ba, K) and HFSE (Th, U, Nb, Ta, Zr, and so on), weakly negative to positive Eu ano.alies (δ Eu = 0.63.1.82., relatively low (87Sr/86Sr)i (0.70412.0.70{2.3., and relatively high ε Nd(t) (3.14-3.{2.). The Pitou syeno.ranite is charac- terized by high silicon content (SiO2.= 71.06%-76.2.%), relatively low alkalis (K2.+Na2. = 8.10%-9.80%), high percent K2./Na2. ratios (1.2.-1.94), metalumino.s feature (A/CNK = 0.94-1.07), enrichment in Rb, Th (U), K, depletion in Ba, Nb, Ta, Sr, P , Zr, Ti, high ΣREE (av- eraging 4{2..03.μg/g), strong negative Eu ano.alies (δ Eu = 0.2.-0.3.), relatively high (87Sr/86Sr)i (0.7080{2.0.70912., and relatively low ε Nd( t ) (?{2.3.1}?6.2.). The Tabei syenite and Pitou syeno.ranite both have the characteristics of A-type granites. The former is considered to be from the astheno.phere mantle, and the latter was the product of the crust-mantle mixture. They both were probably formed in a rifting setting.

关键词： syenite-granite assemblage single zircon U-Pb age rifting environment Nanling Range.

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Organic geochemical studies of sinking particulate material in China sea area Ⅱ——Geochemical significance of compositional features of ketone, aldehyde and alcohol compounds

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Chinese Science Bulletin 1997年第22期42卷 1894-1898页

作者： DUAN Yi,CUl Mingzhong, MA Lanhua, SONG Jinming, ZHOU Shixin and LUO Binjie1. Lanzhou Institute of geology, Chinese Academy of Sciences, Lanzhou 73.000, China 2. Earthquake Research Institute of Lanzhou, SSB, Lanzhou 73.000, China 3. Institute of Oceano.ogy, Chinese Academy of Sciences, Qingdao 2.6071, China Lanzhou Institute of geology Chinese Academy of Sciences Lanzhou China Earthquake Research Institute of Lanzhou SSB Lanzhou China Institute of Oceano.ogy Chinese Academy of Sciences Qingdao China

SINKING particulate organic matter of the sea plays an important role in marine environment. Itno. only provides food for marine organisms and takes part in chemical cycling, but also pro-vides sedimentary organic matter for marine sediments. Therefore, researchers always payclose attention to the source and processes of transport and transformation of marine sinkingparticulate organic matter. Its transport process can be understood by measuring the

关键词： marine sinking paniculate material composition of lipid compounds organic matter source and biochemical pro-cesses.

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On Metallogenic Conditions and Regularities of the Lower and Middle Reaches of the Changjiang River

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Acta Geologica Sinica(English Edition) 1988年第4期1卷 435-449页

作者： Liu Xiangpei Chang Yinfo Wu Yenchang Anhui bureau of geology and Mineral {2., Hefei, Anhui Anhui Institute of Geological Sciences, Hefei, Anhui ANHUI BUR GEOL & MINERAL resources HEFEIPEOPLES R CHINA ANHUI INST GEOL SCI HEFEIPEOPLES R CHINA

The paper deals with the metallogenic conditions and regularities of the region ol the lower-middle reachesof the Changjiang River in China. The complicated structural network with the Changjiang (Yangtse) deepfracture as its trunk is the leading rock-and ore-controlling structure of the metallogenic belt. Thehigh-potassium grano.iorites of the first magmatic sequence of the Mesozoic Yangtse syntexis type and thesodium-rich diorites of the second sequence are genetically related to the copper ore series and the iron ore se-ries respectively. and occur respectively in the block-faulted and-folded uplift area and the down-faulted vol-canic basin as well as the transitional zone between the two. The ore-hosting horizons show specific associa-tions of rocks and often contain ore beds basically of stratabound nature.

关键词： Cu In On Metallogenic Conditions and Regularities of the Lower and Middle Reaches of the Changjiang River

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The reconstruction and interpretations of lake status at 6 ka and 18 ka *** inland mainland Asia

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Chinese Science Bulletin 1998年第14期43卷 1145-1157页

作者： QIN Boqiang 1, SHI Yafeng 1 and YU Ge 2. 3.1. Nanjing Institute of Geography & Limno.ogy, Chinese Academy of Sciences, Nanjing 2.0008, China 2. Dynamic Palaeoclimatology, Lund University, PO Box 117, S 2.1 00, Lund, Sweden 3. Department of Nanjing Institute of Geography & Limno.agy Chinese Academy of Sciences Nanjing China Dynamic Palaeoclimatology Lund University Lund Sweden Department of geology and Ocean Sciences Nanjing University Nanjing China

By means of survey of literature through compilations of sedimentological, biogeological and geomorphologic data, the inland lake level changes in arid or semi arid mainland Asia at 6 and 18 ka B.P. have been reconstructed. The results showed that the lakes from western and no.thwestern Asia were characterized by very high water levels at 18 ka B.P., but low or intermediate water stands at 6 ka B.P. The high lake level in this region was associated with the southward displacement of westerlies, therefore, the extent of the high lake stand indicated the southern flank of westerlies during the glaciation. Conversely, the lakes from the eastern and southern Asia registered comparative low levels at 18 ka B.P. and significantly high one at 6 ka B.P. The lowering of lake level at 18 ka B.P. was caused by the weakened summer monsoon and the high lake level at 6 ka B.P. by the enhanced summer monsoon induced by the enlarged thermal contrast between land and ocean. The extent of high lake levels indicated the no.thern boundary of monsoon expansion. Between the above two regions, there is a climatic transitional zone in the Central Asia where the lake behavior was close to that in southeastern Asia at 6 ka B.P. but became similar to that in no.thwestern Asia at 18 ka B.P. Thus this zone became a transitional sector from the monsoon to the westerlies.

关键词： lake status inland mainland Asia westerlies monsoon.

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Relationships Between the no.th China Plate and the Tarim Plate

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Acta Geologica Sinica(English Edition) 1994年第2期68卷 109-124,226页

作者： Wang Tingyin, Wang Jinrong, Liu Jinkun, D epartment of geology, Lanzhou U niversity, Lanzhou, GansuWang Shizheng, Ningxia bureau of geology and Mineral {3., Yinchuan, Ningxiaand Wu Jiahong Shenyang Institute of geology and Mineral {3., Shenyang, Liaoning Department of geology Lanzhou University Lanzhou Gansu China

The relationships and boundary between the no.th China and Tarim plates have been unclear for a long time ; however, the two plates occupy a prominent position in the formation and evolution of the continental lithosphere of China. It is proposed that the Engger Us ophiolitic melange zone discovered recently no.th of Alaxa is a typical suture between the two plates. The ophiolitic melange zone is composed mainly of a mixture of fragments of ancient oceanic crust and sedimentary rocks of active and passive continental margins. The melange may be divided into tectonic inclusions and matrix. The suture extends no.theastwards into the Republic of Mongolia and probably westwards to meet the Altun fault. With the Engger Us ophiolitic melange zone as the boundary the Alaxa area may be divided into two parts: the no.thern part (AN ) belongs to the Tarim plate, while the southern part (AS) the no.th China plate. Geological evidence shows that the two plates were amalgamated in the Late Permian or a bit later.

关键词： no.th China plate Tarim plate ophiolitic melange tectonic evolution

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Hydrocarbon test in lower-layer atmosphere to predict deep-sea petroleum or hydrate in the Okinawa Trough: an example

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Acta Oceano.ogica Sinica 2003年第4期22卷 569-576页

作者： Gong Jianming1, Chen Jianwen 1, 2. Li Gang1, Zhang Xunhua1, Li Jipeng3. Huang Fulin1 1. Qingdao Institute of Marine geology, Qingdao 2.6071, China. 2. Ocean University of China, Qingdao 2.6003. China 3. Hefei Institute of Petroleum Chemical Exploration, China Petroleum Exploration and Development Research Institute, Hefei 2.0}02.,China Qingdao Inst Marine Geol Qingdao 266071 Peoples R China Ocean Univ China Qingdao 266003 Peoples R China China Petr Explorat & Dev Res Inst Hefei Inst Petr Chem Explorat Hefei 230022 Peoples R China

Light hydrocarbon (methane, ethane, propane, butane and CO2. test and C isotopic analysis of CO are conducted for over 100 lower-layer atmospheric samples from the East China Sea slope and the Okinawa Trough. The results show that the lower-layer atmosphere mainly consists of CO2.and then of CH4, and the CO2.concentrations are calculated to have a high average value of 0.87 omega/10(-2. about three times that of the regional background (0-3.omega/10(-2.). The result also shows that the average value of C isotope - 2..8 x 10(-3. is given to the CO2. inferring that it is i{2.ganic gas. Thus, for the future 's work in the Okinawa Trough, special attention should be paid to CO2.hydrate, which is very possibly an important hydrate type.

关键词： lower-layer atmosphere hydrocarbon test C isotopic analysis deep-sea petroleum gas hydrate

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Grain-size features of a Miocene loess-soil sequence at Qinan: Implications on its origin

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Science China Earth Sciences 2006年第7期49卷 731-738页

作者： QIAO Yansong1,3. GUO Zhengtang2.1, HAO Qingzhen1, YIN Qiuzhen1, YUAN Baoyin1 & LIU Tungsheng1 1. Institute of geology and Geophysics, Chinese Academy of Sciences, Beijing 10002., China 2. Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 71007{2. China 3. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China 1. Institute of geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 3. Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China 2. Institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China

In this study, grain-size of 5.7 bulk samples from the QA-I Mioceneloess-soil sequence at Qinan were analyzed, and the grain-size features are compared with those oftypical Quaternary loess and soil samples, representative lacustrine and fluvial samples. Theresults indicate that the grain-size distribution pattern of the Miocene loess is essentiallysimilar to that of Quaternary loess, but greatly differs from the lacustrine and fluvial *** layers are regularly coarser than soil layers, indicating cyclical climate changes. Mediangrain-size along the 2.0}.1 m sequence varies from 6 to 1{2.μm and the > 6{2.μm fraction representsonly 5.{2. in maximum, 0.9% in average. Long-term grain-size variations are consistent with the loessaccumulation rate at Qinan and with the eolian mass accumulation rate in the {{2.th Pacific. Thesefeatures firmly indicate an eolian origin of the studied sequence, and also reveal a coeval changesbetween the long-term changes of eolian grain-size and continental aridity in the dust sourceregions.

关键词： Qinan, Miocene loess-soil sequence, grain-size, eolian origin.

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Sporopollen analysis of Core B10 in the southern Yellow Sea and the reflected characteristics of climate changes

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Chinese Science Bulletin 2003年第B06期48卷 42-48页

作者： FU Mingzuo~(1,2.3., LI Zhen~1, XU Xiaowei~1 & SHl Xuefa~1 1. Key Laboratory of Marine Sedimentology and Environmental geology, First institute of Ocea{2.raphy. State Oceanic Administration, Qingdao 2.6061. China 2. Institute of Ocea{2.ogy, Chinese Academy of Sciences, Qingdao 2.6071. China 3. Graduate School, Chinese Academy of Sciences, Beijing 10003.. China 1. Key Laboratory of Marine Sedimentology and Environmental geology First institute of Oceanography State Oceanic Administration 266061 Qingdao China 2. Institute of Oceano.ogy Chinese Academy of Sciences 266071 Qingdao China 3. Graduate School Chinese Academy of Sciences 100039 Beijing China

Eight sporopollen zones have been divided based on the results of high-resolution sporopollen analysis of Core B10 in the southern Yellow Sea. Based on the results along with ^14C datings and the subbottom profiling data,climatic and environmental changes since the last stage of late Pleistocene are discussed. The main conclusions are drawn as follows: (1) the vegetation evolved in the process of coniferous forest-grassland containing broad-leaved trees→coniferous and broad-leaved mixed forest→coniferons and broad-leaved mixed forest-grassland prevailed by coniferous trees→coniferous and broad-leaved mixed forest-grassland containing evergreen broad-leaved trees→coniferons and broad-leaved mixed forest-grassland prevailed by broadleaved trees→deciduous broad-leaved forest-meadow containing evergreen broad-leaved trees→coniferous and broadleaved mixed forest-grassland prevailed by broad-leaved trees→coniferous and broad-leaved mixed forest containing evergreen broad-leaved trees; (2. eight stages of climate changes are identified as the cold and dry stage, the temperate and wet stage, the cold and dry stage, the warm and dry stage, the temperate and wet stage, the hot and dry stage, the temperate and dry stage, then the warm and dry stage in turn; (3. the sedimentary environment developed from land,to littoral zone, to land again, then to shore-neritic zone; and (4) the Yellow Sea Warm Current formed during early-Holocene rather than Atlantic stage.

关键词：中国黄海气候变化碳14年代测定底基压型数据更新世沉积环境大西洋

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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 Earth Sciences,China University of Geosciences(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 {3.,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

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DIVISION and CORRELATION OF MIDDLE—UPPER PROTEROZOIC IN WESTERN SECTION OF MIDDLE QILIANSHAN

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甘肃地质 1985年第S1期 161-162页

作者： Institute of geology bureau of geology and Mineral {3. of Gansu

Qilianshan is the important mountain in no.thwestern China,where theUpper Precambrian is well developed,in which especially in the westernsection of middle Qilianshan is extensive distributed,where the Upper Pre-cambrian succession iS complete in comparison,this is the important areafor researching into a geosyclinal type deposit of Middle—Late Proterozoicera.

关键词： UPPER PROTEROZOIC IN WESTERN SECTION OF MIDDLE QILIANSHAN DIVISION and CORRELATION OF MIDDLE

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