{"data":{"id":"10.1594/pangaea.725841","type":"dois","attributes":{"doi":"10.1594/pangaea.725841","prefix":"10.1594","suffix":"pangaea.725841","identifiers":[],"alternateIdentifiers":[],"creators":[{"name":"Demina, Lyudmila L","givenName":"Lyudmila L","familyName":"Demina","affiliation":[],"nameIdentifiers":[]},{"name":"Levitan, Mikhail A","givenName":"Mikhail A","familyName":"Levitan","affiliation":[],"nameIdentifiers":[]},{"name":"Politova, Nadezhda V","givenName":"Nadezhda V","familyName":"Politova","nameIdentifiers":[{"schemeUri":"https://orcid.org","nameIdentifier":"https://orcid.org/0000-0002-4484-9458","nameIdentifierScheme":"ORCID"}],"affiliation":[]}],"titles":[{"title":"Speciation of metals in bottom sediments from the south Kara Sea and Ob and Yenisei estuarine zones"}],"publisher":"PANGAEA","container":{},"publicationYear":2006,"subjects":[{"subject":"Gravity corer","subjectScheme":"Method"},{"subject":"Box corer","subjectScheme":"Method"},{"subject":"Grab","subjectScheme":"Method"},{"subject":"DM49","subjectScheme":"Campaign"},{"subject":"Dmitry Mendeleev","subjectScheme":"Basis"},{"subject":"Archive of Ocean Data (ARCOD)","subjectScheme":"Project"}],"contributors":[],"dates":[{"date":"2006","dateType":"Issued"}],"language":"en","types":{"ris":"GEN","bibtex":"misc","citeproc":"article","schemaOrg":"Collection","resourceType":"Supplementary Publication Series of Datasets","resourceTypeGeneral":"Collection"},"relatedIdentifiers":[{"relationType":"IsSupplementTo","relatedIdentifier":"10.1134/s0016702906020078","relatedIdentifierType":"DOI"}],"relatedItems":[],"sizes":["6 datasets"],"formats":["application/zip"],"version":null,"rightsList":[{"rights":"Creative Commons Attribution 3.0 Unported","rightsUri":"https://creativecommons.org/licenses/by/3.0/legalcode","schemeUri":"https://spdx.org/licenses/","rightsIdentifier":"cc-by-3.0","rightsIdentifierScheme":"SPDX"}],"descriptions":[{"description":"Speciation of Fe, Mn, Zn, Cu, Co, Ni, Cr, Pb, and Cd was studied in 52 samples of bottom sediments collected during Cruise 49 of the R/V \"Dmitry Mendeleev\" to the estuaries of the Ob and Yenisei rivers and to the southwest Kara Sea. Immediately after sampling the samples were subjected to on-board consecutive extraction to separate metal species according to their modes of occurrence in the sediments: (1) adsorbed, (2) amorphous Fe-Mn hydroxides and related metals, (3) organic + sulfide, and (4) residual, or lithogenic. Atomic absorption spectroscopy of the extracts was carried out at a stationary laboratory. Distribution of Fe, Zn, Cu, Co, Ni, Cr, Pb, and Cd species is characterized by predominance of lithogenic or geochemically inert modes (70-95% of bulk contents), in which the metals are bound in terrigenous and clastic mineral particles and organic detritus. About half of total Mn amount and 15-30% of Zn and Cu are contained in geochemically mobile modes. Spatiotemporal variations in proportions of the metal species in the surface layer of sediments along sub-meridional sections and through vertical sections of bottom sediment cores testify that Mn and, to a lesser extent, Cu are the most sensitive to changes in sedimentation environment. The role of their geochemically mobile species notably increases under reducing conditions.","descriptionType":"Abstract"},{"description":"Supplement to: Demina, Lyudmila L; Levitan, Mikhail A; Politova, Nadezhda V (2006): Speciation of some heavy metals in bottom sediments of the Ob and Yenisei estuarine zones. Geochemistry International, 44(2), 182-195","descriptionType":"Other"}],"geoLocations":[{"geoLocationBox":{"eastBoundLongitude":"83.3187","northBoundLatitude":"76.0177","southBoundLatitude":"68.8238","westBoundLongitude":"60.7522"}},{"geoLocationPlace":"Kara 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