碱都——桐柏吴城天然碱矿

吴城天然碱矿区位于桐柏县吴城乡南部.碱矿赋存于吴城盆地中心偏北,呈北西一南东不规则椭圆形展布,面积4.66平方公里.     

碱都——桐柏吴城天然碱矿

吴城天然碱矿区位于桐柏县吴城乡南部。碱矿赋存于吴城盆地中心偏北,呈北西一南东不规则椭圆形展布,面积4．66平方公里。     

吴城天然碱矿发现勘探史简介

一九七一年,河南省地质局十二队,在吴城盆地首次发现产于下第三系的古天然碱矿。通过勘探证实,这个古天然碱矿规模大,居国内之冠;品位富,开发建设条件良好。在吴城天然碱矿发现之前,十二队已在南阳盆地搞了二年多的找盐工作,重点放在毗邻含盐丰富的江汉盆地且沉积特点相似的瓦店凹陷。但瓦店凹陷面积达2000平方公里,沉降幅度为3000—4000米,由于千米钻机打不到见效的深度,使找盐工作受挫。失败后总结出一条经验,应从实际探矿能力出发,把工作重点放在小盆地。通过分析对     

桐柏县银洞坡矿山深部找矿取得喜人进展：预测新增金资源量21吨 可延长矿山服务年限5.54年

近日,河南省地矿局地勘一院与中国地质科学院矿产资源研究所在桐柏县银洞坡金矿危机矿山深部找矿项目取得重大进展,预测新增金金属量近21吨,续作项目已通过专家评审。银洞坡金矿位于南阳盆地与吴城盆地之间,始建于1976年,1980年建成投产,是目前我国最大的黄金露天开采矿山,经过近30年的开采,现仅可供开采2．3年。     

河南围山城金银矿带控矿构造研究

围山城金银矿带位于南阳,吴城两个新生代断陷盆地之间,属秦岭东西复杂构造带东段南支。矿带内银洞坡金矿床、破山大型银矿床,具明显层控和矿液多次叠加富集的特征。自1976年以来较多单位对矿带及上述两矿床进行过研究,并相继撰写有关专文论述,本文拟着重讨论地质构造条件在成矿过程中的控制作用。一、矿带地质构造简介矿带内上元古界歪头山组(pt_(3W))为一套变质火山沉积岩系,分上、中、下三部,上覆大栗树组(Pt_(3d))为变质细碧角斑岩建造,两者组成纵贯全区的河前庄(朱庄)     

PRELIMINARY STUDY ON PISIONIDS (ANNELIDA:POLYCHAETA PISIOMDAE) FROM HAINAN ISLAND COASTAL WATERS, SOUTH CHINA SEA

MODUcTIONThislistof4pisionidspedesisoneofthecontributi0nstothestudyoflittofalmeiofaunaIp0lychaetesfromtheChinesecoast.ThernateriaIswerecoforduringashortexpeditiontoHainanIslandbyProfB.L.Wu,Mr.F.P.HuangandMr.Z.H.ixngoftheFirstInstituteofdrinography,StatedrinicAdndnisttationinQingdaoandProfDr.W.WeStheideandDr.G.PurschkeoftheUniversityofDenabruckinOct0berl99l,additionalmateriaIsweresamPledbyMr.Z.H.Dinginash0rtexpeditiontoHongkonginJanuary1995.Hithert0,onlyPtrionelevisetoSaZhao…     

SYSTEMATIC POSITION OF MUCRONELLA PERFORATA OKADA ET MAWATARI 1937

Pacificincolidaefam .novColonyincrustingorincrusting erect,usuallyunilaminar.Frontalwallsofcryptocystaldevelopmentevenlyperforated .Orificemoreorlessbell shaped,longerthanwide,withasemiellipticalanterandastraightorcurvedproximalborder,conspicuouslyconstrictedatbothsidesproximaltothecondyles,andwithoutoralspines.Ascussubcircularorcircular,situatedwithinasuboralumbo.Aviculariausuallywanting,sometimespresent.Hyperstomialovicellsgranulated ,imperforate,andclosedbythezooidaloperculum .Multiporous…     

The Second Editorial Board of Journal of Ocean University of China (A subsidiary periodical on oceanic and coastal sea research)

Editor-in-Chief: WEN Shengchang Academician of Chinese Academy of Science, Ocean University of China, P.R.C Deputy Editors-in-Chief: LI Huajun Mar, Eng. Col., OUC, P. R. C SONG Weibo Fisheries Col., OUC, P. R. C LIU Qinyu Phys. & Environ. Oceanogr. Col., OUC, P. R. C WANG Lin Environ. Sci. & Eng. Col., OUC, P. R. C Executive Deputy Editor-in-Chief: PENG Yuan Editorial Office of Journal of Ocean University of China, P.R.C     

SEA FLUX OF TRACE METALS IN SAANICH INLET

The sea fluxes of trace metals, POC, and settled material were studied in anoxic sea water, Saanich Inlet, B.C., Canada with sediment traps. This paper discusses the change of mass fluxes of sediment, trace metals and POC for various seasons and depths. The annual mean of settled material is 1.56 g.m-2 .a-1, 84.6 mg. m-2. a-1 for POC, 60.0 mg.m-2. a-1 for Cu, 16.5 mg.m-2.a-1 for Pb, 189 mg.m-2. a-1 for Zn, 2.20mg.m-2.a-1 for Cd,699 mg.m-2.a-1 for Fe,38.8 mg.m-2.-1 for Co, and 84.6 mg.m-2.a-1 for Ni.The relations between the average fluxes of trace metals and POC, the fluxes of trace metals and settled matter, and the sea fluxes of trace metals and Fe are in linear progression. The resident times of elements as calculated from sea flux, are 1.1 a. for Cu, 0.014 a. for Pb, 0.50 a. for Zn, 3.8 a. for Cd, 0.16 a. for Fe, 0.39 a. for Co,and 1.14 a. for Ni.The order of resident times is as follows: Pb-Fe-Co-Zn-Cu-Ni-Cd. The metal resident times in Saanich Inlet are shorter than the values estimated for the op     

NEW TAXA OF EUGLENOPHYTA FROM CHINA

Eight new taxa of Euglenophyta are described in this paper. They were collected from severalprovinces in China and respectively named Euglena allorgei var. exsulcata. E pisciformis var. globosa, E.tortiliS, Lepocinclis glabra var. papillata, Phacus pisiformis, Ph.strombuliformis,Ph.trimarginatus var.truncatus and Astasia angusta.     

STUDY ON EVAPORATION OF BIELAHONG RIVER BASIN

Asatypicalmarshriver,theBielahongRiverliesinthehinterlandofthehoiangPlain.ItrisesinandgoeSthroughl~areasofplainma-rsh.Themarshrateinthebasinis45Percent.ThehydrologicalcharacteristicsoftheBielahongRiverbasincanreflectthehydrologicalcharacteristicsofthewholernaxshplain.Thereare1.119x106hamarshintheSanjiangPlain.AlterlOng-timedevelopment,marshisstillthemainnaturallandscapeandsoiltypeintheplain.Waterisoneofthemostactiveelementsinmarshecosystem.Itaffectsplantsgrowth,speciesdistribution,soilfo…     

Primary species recognitionand phylogeny of Chondrus （Gigartinales, Rhodophyta） using 18S rDNA sequence data

The nuclear-encoded small subunit ribosomal RNA gene (18S rDNA) of 16 isolates of Chondrus from 8 countries were sequenced. A total of 1796 nucleotides were obtained and aligned with the phylogenetic analysis conducted. The results suggest that the entity from Dalian, China, regarded as C. sp1 is C. pinnulatus. The C. sp2 previously depicted as C. yendoi or Mazzaella japonica may belong to genus Chondrus. So, 4 Chondrus species, i.e. C. ocellatus, C. nipponicus, C. armatus, and C. pinnulatus are distributed in China. However, the entity from Connemara, Ireland, named C. crispus, is not a Chondrus species but that of Mastocarpus stellatus, although it is morphologically similar to C. crispus. Phylogenetic analysis based on complete 18S rDNA sequence data shows that genus Chondrus includes 3 main lineages: the Northern Pacific lineage, containing C. ocellatus, C. yendoi, and C. nipponicus; C. armatus, and C. pinnulatus form the sub-North Pacific lineage; and the Northern Atlantic Ocean lineage, comprising samples of C. crispus from Canada, Portugal, Ireland, Germany and France. The phylogenetic relationships indicate that genus Chondrus might have a North Pacific ancestral origin, radiated to North Atlantic area, and then formed the species C. crispus.     

A MODEL SIMULATING THE PROCESSES IN RESPONSES OF GLACIER AND RUNOFF TO CLIMATIC CHANGE─A Case Study of Glacier No.1 in the ■rümqi River, China

①TheprojectsupportedbytheNationalNaturalScienceFoundationofChina.Mountainglacierisaproductofmutuallyjointactionofclimateandtopography.AtthisPOint,climaticchangemakeglacieradapttoitschangethroughadjustingglacierareaandlengthfollowingtheglacierinnermovementlaw.Intheory,glacieralwayscorreSpondstoastablestateunderacertainclimaticcondition.Becauseoflimitationoftheglaciermovementlaw,theglacierhastograduallyadapttOclimaticchange.Also,climateisalwaysinchange.So,itisalmostimPOSSibleforglaciertor…     

Study on wetland resources in deltas around Bohai Sea

lINrnODUCTIONWetlandisoneoftheimPortantresourPeswiththehighestbiodiversityandproductivity.Greatenviron-mentalfunctionssuchasstabilizingclimate,controllingfloods,purifyingPOllution,providinghabitatsforcrea-tures,etc.areperformedbywetlands.Wetlandsindeltaareashavespecialecologicalpropertiesandland-scapepattems.So,itissignificanttostudythere-sourcesofwetlandslocatedindeltas.HuanghedeltaandLiaohedeltaaretwolargestdeltasaroundtheBohaiSea.TheyrepresentdeltasareundBohaiSeainpropertiesofwetlan…     

Determination of apparent sampling thickness of sea surface microlayer

IwrRODUtvIONTheseasurfacendcrolayer(SML)isathinair-seainterfacelayerwithphySical,chdricalandbiologicalproperties.OrganicmateriaIs,haceAnIs,nutrientS,particulatCrnat-terandplanktonaregenefallyenrichedintheSML(Hardy,JT.etal.,l98O,Wunams,P.M.etal.,1986).ThesamPlersforcolledingtheSMLwerernainlyglassplatespearvey,G.W.etal.,l972,l985;ZhangZhengbinetal.,l996),rotatingdrums(Harvey,G.W.,1966,Daumas,R.A.l976),screensgurmt,W.D.,l965,Piotrowicz,S.R.etal.,l972,Carison,D.J.,l982),funneIs…     

A Taxonomic Study of the Genus Tinocladia (Chordariales, Phaeophyta) in China Coasts I. Two new species, T. eudesmoides sp.nov. and T. zhangii sp.nov.

1INTRODUCTIONThegenusTinocladiaKylinderivedfromthege nusEudesmeJ.Ag.,wasestablishedbyKylinin1 940 .Untilnow ,fivespecieshavebeenreported .Threespecies,T .crassa (Sur.)Kylin(byC .K .Tseng,1 983 ) ,T .gracilisDingetLuandT .mi crosporangiiDingetLu (byDingetal.,2 0 0 4)inthegenusTinocladiahadbeenreportedtodate.Inthecourseofourinvestigationonthespecimensofthege nusTinocladiacollectedfromtheYellowSeacoastsandkeptintheHerbariumoftheInstituteofOceanolo gy,ChineseAcademyofSciences,twomo…     

Journal of Mountain Science Index for Volume 2, 2005

A.B. Bhatt. See Uday N. Gaur, 255~264 Alexander L. Densmore. Active Tectonics and Erosional Unloading at the Eastern Margin of the Tibetan Plateau, 146~154 A. Pathirana. See D. K. Swain, 329~335 BEDNARIK Martin. See POISEL Rainer, 211~217 CHENG Jie. Ice-wedge Casts Showing Climatic Change Since the Late Pleistocene in the Source Area of the Yellow River, Northeast Tibet, 193~201 CHENG Zunlan. Debris Flow Dam Formation in Southeast Tibet, 155~163 DENG Yulin. See T…     

REGIONAL DEVELOPMENT AND REGIONALIZATION:RETROSPECT OF CHINA’S HISTORICAL ENLIGHTENMENT

1imLI~areMoraXGIOna~~NT1'RegionalinfferentiationandRegionalSustainableDevelOPmentEveninancienttimes,Chinesehadtheideaofregionaldifferentiation.Nearly4000yealsago,Xiayu,theXiaDynaStyemperor,dividedChinaintonineterritoriesaccordingtodifferentpeOPleandlandfonnations.Inthisway,theconceptOfregionalsustainabledevelOPmentgraduallygrew.Itiselntheiedinnumerouspeasants'proverbswhichholdtothisday.TheconceptwassucceSSfullyappliedtOthecultivationofdeltasandthefO~tionofdeltaciviliZation.2.Delta…     

PRELIMINARY STUDY ON FLASH FLOODS IN TARIM RIVER BASIN

Flashfloodsaretheimportanteventsofthehydrologicalregimeofriversinaridareas.IntheTarilncaver(Fig.1),northwesternChina,flashfledarebeingmonitored.TheobSerVeddataandinvestigationdemonstratethedifferenceintime,place,frequencyandintensityoftheiroccurrences.Therearethreet~offlagescommontotheThermcaverbasin.AlmOSteveryyea-rhighwateroccursinmonthesofJuly,AugUstandseptembercausedbyablationrunoff.However,themostdamagingflowSarefromoccasionalflashfindsbyinstenserainstormandglacierlakeoutburstflags(…