资源描述：
《西沙海槽研究区天然气水合物地球化学勘探及成藏》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、第12卷第1期地学前缘(中国地质大学,北京;北京大学)Vol.12No.12005年3月EarthScienceFrontiers(ChinaUniversityofGeosciences,Beijing;PekingUniversity)Mar.2005西沙海槽研究区天然气水合物地球化学勘探及成藏模式研究孙春岩1,牛滨华2,王宏语2,赵克斌5,吴能有4,苏新3,李佳21.中国地质大学工程技术学院,北京1000832.中国地质大学地球物理与信息技术学院,北京1000833.中国地质大学海洋学院,北京1000834.广州海洋地质调查局,广东广州51
2、07605.中石化研究院化探中心,安徽合肥2300221,NIUBin-hua2,WANGHong-yu2,SUNChun-yan5,WUNeng-you4,SUXin3,LIJia2ZHAOKe-bin1.SchoolofEngineering&Technology,ChinaUniversityofGeosciences,Beijing100083,China2.SchoolofGeophysics&InformationTechnology,ChinaUniversityofGeosciences,Beijing100083,China3.
3、SchoolofOcean,ChinaUniversityofGeosciences,Beijing100083,China4.OceanGeologyInvestigationBureauofGuangzhou,Guangzhou510760,China5.InstituteofPetroleumGeochemicalProspecting(SINOPEC),Hefei230022,ChinaSUNChun-yan,NIUBin-hua,WANGHong-yu,etal.Astudyofgashydrategeochemicalexplorat
4、ionanddepositformationpatternsintheXishaocean.EarthScienceFrontiers,2005,12(1):243-251Abstract:ThepaperreliesontheacidolysishydrocarbonresultsofsamplesobtainedfromlegODP204,1250Csite.Wehaveanalyseddatafromseveralsitesandinvestigatedthepatternsofgashydratedepositsinthearea,and
5、theoriginofthegashydrate.Theresultsofthisresearchshowthatthegeochemicalanomaliesofgaseoushydrocarbonindicatrixaremainlydistributedinthesouthernslopeoftheareastudied.ThisiscloselyrelatedtotheseismicBSRmarkerandtothedevelopmentoftheruptures;andthatthecauseofformationofsubma-rin
6、esedimentarygaseoushydrocarbonmethaneintheXishaoceantroughismainlyascribedtopyrolysis.Wediscussthefault-filteringandcomprehensiveformationpatternofthegashydrate,whichreasonablyexplainstheinconsistencyoftheBSRzonewiththehighvalueanomalyzoneofseabedmethane,andpredictssomefa-vor
7、ableprospectingareas.Theresultsalsoprovidethegeochemicalevidencefortheexplorationofthegashy-drate,andshedlightonthecauseofitsformation.Keywords:gashydrate;BSR;geochemicalanomaly;Xishaoceantrough;favorableprospectingarea;depositformationpattern摘要:依据ODP204航次1250C站位钻井样品酸解烃数据结果,以
8、及作者在南海西沙海槽研究区天然气水合物地球化学现场勘查中得到的多种烃类指标数据、异常点上微量甲烷碳同位素数值等资料,对海洋水合物地球化学
