The trace element geochemistry of marine biogenic particulate matter

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1、Prog.Oceanog.Vol.13,pp.113-199,1984.0079-6611/84$0.00+.50PrintedinGreatBritain.Allrightsreserved.Copyright~<1984PergamonPressLtd.TheTraceElementGeochemistryofMarineBiogenicParticulateMatterROBERTCOLLIER*andJOHNEDMONDt*CollegeofOceanography,OregonStateUniversity,Corvallis,OR97331,U.S.A.tDepart

2、mentofEarthandPlanetarySciences,MassachusettsInstituteofTechnology,Cambridge,MA02319,U.S.A.ABSTRACT-Planktonsampleshavebeencarefullycollectedfromavarietyofmarineenvironmentsformajorandtrace-chemicalanalysis.Thesampleswerecollectedandhandledundertherigorousconditionsnecessarytopreventcon-tamin

3、ationofthetraceelements.Immediatelyaftercollection,thesamplesweresubjectedtoaseriesofphysicalandchemicalleachlng-decompositlonexperimentsdesignedtoidentifythemajorandtraceelementcompositionofthebiogenlcparticulatematter.Emphasiswasplacedonthedeterminationofthetraceelement/majorelementratiosin

4、thevariousblogenicphasesimportantinblogeochemicalcycling.Themajorityofthetraceelementsinthesamplesweredirectlyassociatedwiththenon-skeletalorganicphasesoftheplankton.Theseassociationsincludeaverylabilefractionwhichwasrapidlyreleasedintoseawaterimmedi-atelyaftercollectionandamorerefractorycomp

5、onentwhichinvolvedspecificmetal-organicbinding.Calciumcarbonateandopalwerenotsignificantcarriersforanyofthetraceelementsstudied.Arefractoryphasecontainingaluminumandironinterrlgenousratioswaspresentinallsamples,evenfromremotepelagicenvironments.Thisnon-biogeniccarriercontributedinsignificanta

6、mountstotheothertraceelementsstudied.Theplanktonsampleswerecollectedfromsurfacewaterswithawiderangeinthedissolvedtraceelement/nutrlentratios,however,thesameelementalratiosinthebulkplanktonsampleswererelativelyconstantinalltheseenvi-ronments.Thebulkcompositionsandtherapidreleaseofthemetalsandn

7、utri-entelements(specificallyphosphorus)fromtheplanktonaftercollectionwereusedtoexaminethesystematicsofdepletionsofthedissolvedelementsfromsurfacewaters.Theseelementalratioswerecombinedwithknownfluxesofthemajorblogenlcmaterialstoestimatethesi