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MASS ACCUMULATION IN THE CENOZOIC HOH XIL BASIN,NORTHERN TIBET

地学前缘 2000年第S1期7卷 161-162页

作者： Liu Zhifei 1,2.,Wang Chengshan 2.Yi Haisheng\+2.WT5.5.BX](1 Laboratory of Marine Geology,Tongji University,Shanghai 2.0092.{2. 2.institute of Sedimentary Geology,chengdu University of Technology,chengdu 61005.,{2.)

Sedimentary basins are where the products or erosion of the related reliefs *** sedimentary records preserved in the basins offer the possibility of quantifying the paleotopography z(x,y,t) at each point( x,y )of a given region at any time t in the past by using methods of mass balanced reconstruction(Hay et al.,1989,Métivier and Gaudemer,1997),The importance of paleotopography is on that atmospheric circulation models and the ocean circulation models which depend on them require knowledge of the topography of the land as an important input boundary condition which strongly affects the model output(Barron and Washington,1984,Ruddiman et al.,1997).Thus,a first step towards establishing paleoelevations is to reconstitute the history of sedimentary basins in terms of mass accumulation(Hay et al.,1989).This work reconstructs the space\|time depositional history and estimates the mass stored in the Hoh Xil basin,northern *** Hoh Xil basin,with an area of 101000km\+2.and an average elevation of over 5.00m,is the largest Cenozoic sedimentary basin in the hinterland of the Tibetan *** the Early Eocene to the Early Miocene,a sediment pile of approximately 5.4km thick of fluvial mudstone,sandstone,and conglomerate and 0 3km thick of limestone was formed in the basin (Liu and Wang,2.00;Liu et al.,2.00).the mass estimate is derived from 2. measured field cross\|sections,with total thickness of 13479 *** results show that the Hoh Xil basin has undergone 7 stages of evolution from the Early Eocene to the Early Oligocene,with a period of no sedimentation during the Late *** Fenghuoshan Group was formed from the first four stages as 5. 0～5. 0,5. 0～46 7,46 7～39 7,and 39 7～33 2.a ago,with the depocenter moving eastward and *** Yaxicuo Group was formed from the two next stages as 33 2.32.2.and 33 2.30 2.a *** Wudaoliang Group spread the entire basin during the last stage of ca.2. 0～16 0Ma ago,with its depocenter in the northern part

关键词： mass accumulation Cenozoic Hoh Xil basin Tibet

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Synthesis of 3-Substituted-6-(2.4-Dichlorophenyl)-s-Triazolo[3.4-b]-1,3,4-Oxadiazoles

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Chinese Chemical Letters 1997年第12期8卷 0-0,0-0页

作者： Xiao Ming FENG Xun HE Yao Zhong JIANG(Union Laboratory of Asymmetric Synthcsis, chengdu institute of Orgnic ChemistryChinesc {2. of sciences, chengdu 61004.) Chinese Acad Sci Chengdu Inst Organ Chem Union Lab Asymmetr Synth Chengdu 610041 Peoples R China

Fourteen new 2.acylhydrazino-5.-(2.4-dichlorophenyl)-1, 3,4 -oxadiazo les were prepared by nucleophilic displacement of acylhpeine at the 2.position of 2.methylsulfonyl-5.(2.4-dichlorophenyl)-1,3,4-oxadiazole. Fourteen new 3-substhad-6-(2.4-dichlorophenyl)-s-triazolo [3,4-b]-1,3,4-oxadiazoles were obtained by treating 2.-acylhydrazion- 5.(2.4-dichlorophenyl )- 1, 3,4-oxadiazoles with K2.O3 solution. All the new compounds showed significant antibacterial activity

关键词： Cl Chen Dichlorophenyl Oxadiazoles Synthesis of 3-Substituted-6 s-Triazolo[3.4-b

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MANTLE SOURCE NATURE OF ORE FLUIDS FOR THE JINDING Pb-Zn DEPOSIT, LANPING, YUNNAN

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地学前缘 2000年第S1期7卷 419-420页

作者： Zhang Lisheng, Yu Qian, Mou Chuanlong[WT5.5.BX]({2. institute of Geology and Mineral Resources, {2. 610082.china)

Geological setting\;Jinding superlarge Pb\|Zn deposit lies in the Lanping basin between the Lancangjiang fracture zone and the Jinshajiang\|Ailaoshan fracture zone. The Lanping basin is a Meso\|Cenozoic rifting basin whose basement consists of the Paleozoic strata. Mesozoic paralic and continental sediments with a thickness of about 2.000m deposited in the basin. In the Paleocene, gypsum\|salt\|bearing strata with a thickness of more than 1000m accumulated. In the Cenozoic, collision of the Indian plate with the Eurasian plate resulted in strong folding and napping and subsequent extensions in the Oligocene and Pliocene. The extensions were responsible for alkaline magmatic intrusion in the centre and alkaline magmatic extrusion in the *** is well developed. N\|S\|trending Bijiang fault with a length of 12.km links with the Jinshajiang fracture zone in the north and with the Lancangjiang fracture zone in the south, controlling on the Cenozoic Lanping rifting basin and acting as passage\|way for ore fluids.

关键词： Jinding Pb\|Zn deposit mantle source ore fluid

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Crystallization and preliminary X-ray studies of porcine kidney aminoacylase Ⅰ

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Chinese Science Bulletin 1997年第20期42卷 1750-1752页

作者： ZHAOHaiyan, MENGWuyi, LIN Zhengjiong and ZHOU Haimeng1. National Laboratory of Biomacromolecules, institute of Biophysics, Chinese academy of {2., Beijing 100101, china 2. Department of Biological Science and Biotechnology, Tsinghua University, Beijing 100084, china National Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Beijing China Department of Biological Science and Biotechnology Tsinghua University Beijing China

AMINOACYLASE Ⅰ（ACY-1）（E. C. 3. 5. 1. 14 ） participated in amino acid metabolism existingin mammalian kidney and microorganisms, and catalyzes reversible hydrolysis of acylaminoacids. ACY-1 consists of 772.amino acids, and the molecular weight is 85.5.0 daltons. It is adimeric metalloprotein having two Zn2. in the molecule. The nucleotide and the amino acid se-quence of porcine and human ACY-1 have been determined. The nucleotide sequence and

关键词： aminoacylase I crystallization preliminary crystallography.

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Mineralization episode of porphyry copper deposits in the Jinshajiang-Red River mineralization belt: Re-Os dating

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Science china Earth sciences 2005年第2期48卷 192-198页

作者： WANG Denghong, QU Wenjun, LI Zhiwei, YIN Hanlong4 & CHEN Yuchuan institute of Mineral Resources, Chinese academy of Geological {2., Beijing 100037, china National Center of Rock and Mineral Analysis, Chinese academy of Geological {2., Beijing 100037, china Resource Assessment Center of Yunnan, Kunming 65.011, china institute of Geology and Geophysics, Chinese academy of {2., Beijing 100101, china Chinese academy of Geological {2., Beijing 100037, china 1. institute of Mineral Resources Chinese Academy of Geological Sciences 100037 Beijing China 2. National Center of Rock and Mineral Analysis Chinese Academy of Geological Sciences 100037 Beijing China 3. Resource Assessment Center of Yunnan 650011 Kunming China 4. institute of Geology and Geophysics Chinese Academy of Sciences 100101 Beijing China 5. Chinese academy of Geological {2. 100037 Beijing China

Re-Os isotopic dating for the molybdenites from the porphyry copper deposits of the Jinshajiang-Red River mineralization belt in Yunnan Province yields isochron ages of 33.9±1.1 Ma for the Machangqing deposit and 34.4±0.5.Ma for the Tongchang deposit. This result shows that both the Machangqing and the Tongchang porphyry Cu-Mo deposits from two different ore-fields formed simultaneously. This new data and the published Re-Os model ages of molybdenite (35.4 Ma, 35.9 Ma, 36.2.Ma) of the Yulong porphyry copper deposit in Tibet, which is located in the same Jinshajiang-Red River mineralization belt as the Machangqing deposit and the Tongchang deposit, suggest that these three Cenozoic porphyry copper deposits in the Jinshajiang-Red River mineralization belt were contemporary for their mineralization episode. That is to say, even their present locality is far away and nearly iso-distantly distributed, these three porphyry Cu(Mo) deposits belong to the same mineralization episode at the end of Eocene.

关键词： Re-Os isotopic dating, porphyry Cu deposits, Cenozoic, mineralization episode.

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PETROLOGY AND GEOCHEMISTRY OF CENOZOIC VOLCANIC ROCKS FROM THE CENTRE OF QIANGTANG,TIBET

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地学前缘 2000年第S1期7卷 170-171页

作者： Tan Fuwen, Pan Guitang, Xu Qiang[WT5.5.BX]({2. institute of Geology And Mineral Resources, {2. 610082.china)

The Cenozoic volcanic rocks in Qinghai—Tibetan plateau mainly occur in Qiangtang, Kunlun,Kokshili and eastern Tibet to the north of Bangong\|Nujiang suture. The study area locates in the centre of Qiangtang (N34°00′\|34°5.′;E87°30′\|89°00′),where is nearly a blank area of geological *** pieces of samples from Hehulin,Luanqingshan,Bandaohu and Donghu show that the K\|Ar ages of the Cenozoic volcanic rocks range from 32.6 to 44 1Ma, which are elder than the Cenozoic volcanic rocks from Kunlun,Kokshili and eastern *** are two types of occurrence for the volcanic rocks: volcanic lava and sub\|volcanic rock. The lava is dark grey, light purple or dark purple and unconformably covers up on the Jurassic,which interbeds with purplish red tertiary sandstone and pebble\|bearing sandstone and contains a small amount of phenocrysts (andesine,pyroxene,amphibole and biotite). three craters and four volcanic necks have been found in this area. The sub\|volcanic rocks expose as volcanic necks with appearance of isolated peaks,which intrude into Jurassic. The rocks,appearing grey white to light grey, have trachytic texture with the phenocrysts of plagioclase,biotite and amphibole. Besides above rocks,there are some lamprophyre dikes intruding into grey white tertiary lacustrine algal limestone in this area with its length up to 2.m and width 3m. The rocks appear dark grey or dark green and contain the phenocrysts of pyroxene,orthoclase,biotite,olivine,and leucitite.

关键词： Tibet volcanic rocks geochemistry REE

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PALAEOMAGNETIC STRATIGRAPHIC STUDIES OF THE JURASSIC AND LOWER CRETACEOUS ROCKS FROM THE QIANGTANG BASIN, NORTHERN TIBET

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地学前缘 2000年第S1期7卷 177-178页

作者： Zhu Tongxing, Zhuang Zhonghai, Pan Zhongxi[WT5.5.BX]({2. institute of Geology and Mineral Resources, {2. 610082.china)

The Qiangtang Basin located in northern Tibet is a Jurassic foreland basin, whereas the sedimentation for the arc\|basin system during the Late Triassic. Paleomagnetic sampling sites and sections include the Lower Jurassic section in Juhuashan, Shuanhu district, the Middle and Upper Jurassic section in Nadigangri Mountain and the Lower Cretaceous section in Abushan, Shuanhu district. The Lower Jurassic Nadigangri Fm. is composed of tuffaceous volcanic rocks and turbidite (lower) and purple clastic rocks. The Middle Jurassic consists of Quemocuo Fm. purple clastics , Buqu Fm. carbonates and Xiali Fm. gypsum\|bearing varicolored *** Upper Jurassic includes Suowa Fm. carbonates and Xueshan Fm. purple clastics. The Lower Cretaceous Abushan Fm. is lacustrine clastics.172. oriented paleomagnetic samples of Jurassic and Cretaceous strata were collected in *** sampling sections is located in Shuanhu district of northern Tibet. Although it is unlikely that the sections studied formed by constant and continuous deposition, field evidence indicates no major breaks in the Jurassic sedimentation, except early Bajocian stage. Based on sections of actual survey, all sampling was done using a portable gas\|powered core drill, and cores were oriented with magnetic compass and inclinometer. Samples were obtained at common stratigraphic spacing of 0 5.5., partly 5.m at some important geological boundary\|surfaces and beds/members. 2.0}m diameter and 2.～5.mm length paleomagnetic core samples were drilled in cropping field. The measuring of most samples was completed at the china academy of Geosciences Paleomagnetic Laboratory using a type DSM\|2.digital rotational magnetometer (its sensitivity of reaching 10 -5.A/m) made by SCHONSTEDT Company of U.S.A., and SCHONSTEDT TSD\|1 for thermal demagnetization. The apparatus used for AF demagnetization was a commercial (SCHONSTEDT GSD\|5.instrument, capable of reaching 100mT peak field. 10% of total measuring samples were complete

关键词： magneto\|stratigraphy Jurassic & Cretaceous Qiangtang B asin Tibet

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Mesozoic subduction-accretion zone in northeastern South china Sea inferred from geophysical interpretations

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Science china Earth sciences 2006年第5期49卷 471-482页

作者： ZHOU Di1, WANG Wanyin2. WANG Jialin3, PANG Xiong4, CAI Dongsheng5.& SUN Zhen1 1. Key Laboratory of Marginal Sea Geology, South china Sea {2. of Oceanology, Chinese academy of sciences, Guang- zhou 5.0301, china 2. College of Geological and Topographical Engineering, Chang’an University, Xi’an 71005., china 3. Key Laboratory of Marine Geology, Tongji University, Shanghai 2.0092. china 4. china National Offshore Oil Co. Limited – Shenzhen Branch, Shenzhen 5.8067, china 5. china National Offshore Oil Co. Limited – Research Center, Beijing 10002., china 1. Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China 2. College of Geological and Topographical Engineering Chang’an University Xi’an 710054 China 3. Key Laboratory of Marine Geology Tongji University Shanghai 200092 China 4. china National Offshore Oil Co. Limited — Shenzhen Branch Shenzhen 518067 China 5. china National Offshore Oil Co. Limited — Research Center Beijing 100027 China

A segment of Mesozoic subduction-accretion zone was inferred across thenortheastern South china Sea at approximately NE45. orientation. Basic evidence includes thefollowing: A belt of peek gross horizontal Bouguer gravity gradient (PGHGBA) is comparable in sizeand intensity to that of the Manila subduction-accretion zone. A belt of high positive magneticanomalies appears to the north and sub-parallel to the PGHGBA, representing the volcanic arcassociated to the subduction zone. The PGHGBA crosses obliquely both Cenozoic structures and presentseafloor topography, indicating a pre-Cenozoic age. The segment is offset left-laterally byNW-running strike-slip faults, in concord with the Mesozoic stress field of South china. Inaddition, the existence of the subduction zone is supported by wide-angle seismic data obtained indifferent years by different institutions. At approximate localities, a north-dipping ramp of Mohosurface is indicated by records of ocean-bottom seismometers, and a strong reflector about 8 kmbeneath the Moho reflector is indicated by both OBS and long-cable seismic records. Theidentification of a segment of Mesozoic subduction zone in NE South china Sea fills nicely the gapof the Great Late Mesozoic Circum SE Asia Subduction-acrretion Zone, which extended from Sumatra,Java, SE Kalimantan to N Palawan, and from Taiwan, Ryukyu to SW Japan.

关键词： Mesozoic, subduction zone, SE Asia, NE South china Sea, geophysics.

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Effects of artificial regulations of rotifers n-3 HUFA content on the growth and survival of larval black sea bream ( Sparus macrocephalus)

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Chinese Science Bulletin 1997年第13期42卷 1130-1132页

作者： LIU Jingke and LEI Jilin1. institute of Oceanology, Chinese academy of {2., Qingdao 2.6071, china 2.Yellow Sea Fishery Research institute Qingdao 2.6003, china institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

STUDIES on the nutrition requirement of larval fish have made some progress abroad, but therehave been no reports on such studies in china. It was determined recently that n-3 HUFA (es-pecially 2.: 6(n-3) (DHA) and 2.:5.(n-3) (EPA)) is essential for larval seafish growth. Thehigh content of DHA in seafish eggs and the low content of DHA in rotifers show that rotifersas live food cannot satisfy the n-3 HUFA requirement of larval seafish. Some scientists ob-

关键词： rotifer (Brachionus phicatilis) highly unsaturated fatty acid (HUFA) larval black sea bream.

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Effects of Elevated Solar UV-B Radiation from Ozone Depletion on Terrestrial Ecosystems

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Journal of Mountain Science 2004年第3期1卷 276-288页

作者： LIUQing TerryV.Callaghan ZUOYuanyuan chengduinstituteof{2. ChineseAcademyofSciencesChengdu610041China chengduinstituteof{2. ChineseAcademyofSciencesChengdu610041China／／SheffieldCentreforArcticEcologyDepartmentofAnimalandPlantSciencesUniversityofSheffieldSheffieldS105BRUK

In the last three decades much researchhas been carried out to investigate the biologicaleffects of a thinning stratospheric ozone layeraccompanied by an enhanced level of solarultraviolet-B radiation at the Earth’s *** UV-B radiation affects ecosystems in manyways directly and indirectly. The responses can bebiochemical, physiological, morphological oranatomical, and the direction of the response can varybetween different species, communities andecosystems. In this paper we firstly introduce generalconcepts, and methods for measuring the ecologicaleffects of UV-B radiation. Secondly, we provide anoverview interpretation of the effects of enhancedUV-B on terrestrial ecosystems from recent *** studies include effects of UV-B on growth andreproduction, composition of communities,competitive balance, decomposition of litter, andinteractions with other factors etc. Finally, werecommend future research directions to identify theeffects of elevated UV-B radiation on ecosystems inchina.

关键词： Elevated UV-B effects ecosystem community composition decomposition

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