简介:The22ndIASMeetingofSedimentologywasheldintheConventionCentreoftheGrandHotelAdriatic,inasmalltouristictownOpatija,locatedontheeasternAdriaticcoastwhereCentralEuropeandtheMediterraneanmeet.ItwasthesecondIASMeetingheldinCroatia--thefirstone,4thIASRegionalMeetingofSedimentology,washeldinSplitin1983.TheMeetinginOpatijawasorganizedbytheInstituteofGeology(Zagreb)andtheCroatianGeologicalSociety.ThesponsorwasMinistryofScienceandTechnologyoftheReoublicofCroatia.
简介:Inthelate19thandtheearly20thcentury,withexpandingindustrialismandurbanisation,theideaofthenationstategrewstronginSweden.Inthisnationalisticenvironment,natureandthenaturalsciencesassumedanimportantunifyingrole.Thesearchfornaturalresourcesandsourcesofenergyinspiredpoliticalsupportandresearch.Theexploitationofnaturewaslookeduponasaprerequisiteforthemodernizationofthecountry,andindeedwastobecomethebasisforSweden'swelfare.Itwasunderthesecircumstancesthat,in1906,the11thIGCwasinvitedtoStockholmin1910.ArequestforaGovernmentgrantfocusedontheinternationaldevelopmentofsciencebutalsostressedthenationalimportance.Swedenhad,itwassaid,itsrankingpositionamongnationstodefend,toupholditspositionamongcivilizednations,andtomaintainitsdistinguishedtraditioninthespheresofnaturalsciencesandminingoperations.ThemaintopicsoftheCongresswereironoreresources,post-glacialclimatechange,glacialerosion,theCambrianfauna,geologyofthePrecambrian,andgeologyofthepolarregions.Threeexhibitionsand24excursionswerearranged,and41guidebooksprinted.Thenumberofmemberspresentwas625,from37countriesandsixcontinents.Thefinalcostforarrangingthe11thIGCwasSEK125,000(approximately∈540,000today).AnovelexperienceinthetraditionoftheIGCswastheworld-wideinquiriesabouttheresourcesofironoreandaboutclimatechange.Suchthematic,worldwideinvestigationssubsequentlycametoattracttheattentionofmanyIGCs.ApropositiontoestablishacommissionforthepublicationofaninternationalstratigraphicdictionarywasapprovedbytheCongress,andasubcommissionwassetupwithcommissionersfromtencountries,butitwasnotuntil1956thatthefirstvolumesofLexiqueStratigraphiqueInternationalappeared.FromaSwedishpointofview,theCongresscompelledSwedishgeologiststocarryoutaninventoryoftheresultsofSwedishgeologicalr
简介:采用Canny边缘检测技术结合遥感影像去相关、降噪、图像平滑等综合的数字图像处理技术.从ETM^+遥感影像中提取线性体信息,根据已有地质资料进行线形体统计特征分析和伪地质边界剔除,为遥感地质填图提供了技术支持.整个处理过程以Canny算法为核心,结合了小波变换、高斯滤波、梯度算子、阀值运算等多种图像处理方法,并在准噶尔西缘包古图地区的ETM^+遥感影像上进行验证.结果表明,组合的一系列图像处理方法有效地提高边缘检测的准确性,根据已有的地质资料更加精确地修正、划分岩性单元以及确定岩性界线.准确地圈出包古图Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ号岩体,识别出达拉布特断裂及周围大量次级断裂,修正地层界线.