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1、礦物巖石地球化學(xué)通報·研究成果·BulletinofMineralogy，PetrologyandGeochemistryVo1．35No．3，May，2016曹妃甸近岸海域表層沉積物粒度特征及其沉積環(huán)境劉憲斌，李孟沙，梁夢宇，李德亮，劉春琳天津科技大學(xué)，天津市海洋資源與化學(xué)重點實驗室，天津300457摘要：為探討河北曹妃甸人工填海對近岸海域沉積環(huán)境及水動力條件的影響，對該區(qū)沉積物粒度特征進(jìn)行了研究。利用LS13320系列激光粒度分析儀對13個站位沉積物粒度進(jìn)行測試，分析了其粒級組成與特征參數(shù)。結(jié)果表明，研究區(qū)分為3個巖性區(qū)：北部海域潮間帶沉積物以砂
2、質(zhì)粉砂為主；中部工業(yè)區(qū)周圍海域沉積物偏粗，以粉砂質(zhì)砂為主；南部沿岸海域沉積物較細(xì)，以黏土質(zhì)粉砂為主。沉積物平均粒徑介于2．94～6．87中，粒級組分為黏土、粉砂和砂，質(zhì)量分?jǐn)?shù)平均值分別為18．16％、52．30％和29．53％。粒度頻率曲線偏態(tài)．s為0．07～0．81，峰態(tài)K為0．63～2．21，自北向南，由單峰逐漸過渡為主峰或弱峰，與2007年人工填海初期沉積環(huán)境相比，沉積物類型變單一、組分粗化，表明人工填海工程對曹妃甸近岸海域沉積環(huán)境是有影響的。關(guān)鍵詞：曹妃甸；沉積物；沉積環(huán)境；人工填海；粒度分析中圖分類號：P736．21文章編號：1007—28
3、02(2016)03—0507—08doi：10．3969／j．issn．1007—2802．2016．03．014GrainSizeFeaturesandSedimentaryEnvironmentofSurficiaiSedimentsintheCaofeidian0ffshoreAreaLIUXian—bin，LIMeng-sha，LIANGMeng·yu，LIDe—liang，LIUChun-linTianjinKeyLaboratoryofMarineResourcesandChemistry，TianjinUniversityofScie
4、nce＆Technology，Tianfin300457，ChinaAbstract：Inordertoexploretheinfluenceofartificialreclamationtothesedimentaryenvironmentandhydrodynamiccon-ditionoftheCaofeidianofshorearea，HebeiProvince，grainsizefeaturesofsurficialsedimentsintheareahavebeenstudiedinthispaper．Thecompositionandc
5、haracteristicparametersofgrainsizeofsurficialsediments，whichwerecol-lectedfrom13stationsintheCaofeidianofshorearea，havebeenanalyzedbyusingaLS13320LaserDiffractionParticleSizeAnalyzer．Resuhsshowthatthreezoneswithsurficialsedimentsofdifferentgrainsizescanbeoutlinedinthestudyar-ea
6、．Therearemainlysandysihintertidalsedimentsinthenorthernpartofthearea．Therearemainlysiltysandsedimentsinthecentralpartwhereisclosetotheindustrialzone．However，therearemainlyfineclayeysiltsedimentsinthesouth—ernpartofthearea．Thesedimentshaveaverageparticlesizesof2．94～6．87．a(chǎn)verageg
7、rainmassfractionsof18．16％forclay，52．30％forsilt，and29．53％forsand，respectively．Fromnorthtosouth，thefrequencycurveofgrainsizesischangedfromsinglemodetomainorsecondmodegradually，withS“valuesof0．07～0．81andKvaluesof0．63—2．21．Comparingtothesedimentsinearly2007beforetheartificialreclam
8、ation，therecentsedimentsarerelativelysingleincompositi
