{"data":{"id":"10.1594/pangaea.705173","type":"dois","attributes":{"doi":"10.1594/pangaea.705173","prefix":"10.1594","suffix":"pangaea.705173","identifiers":[],"alternateIdentifiers":[],"creators":[{"name":"Bloch, Salman","givenName":"Salman","familyName":"Bloch","affiliation":[],"nameIdentifiers":[]}],"titles":[{"title":"Chemical composition of basal metalliferous sediments from DSDP Leg 9"}],"publisher":"PANGAEA","container":{},"publicationYear":1981,"subjects":[{"subject":"Drilling/drill rig","subjectScheme":"Method"},{"subject":"Leg9","subjectScheme":"Campaign"},{"subject":"Glomar Challenger","subjectScheme":"Basis"},{"subject":"Deep Sea Drilling Project (DSDP)","subjectScheme":"Project"}],"contributors":[],"dates":[{"date":"1981","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":"10.1016/0009-2541(81)90088-7","relatedIdentifierType":"DOI"}],"relatedItems":[],"sizes":["3 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":"Basal metalliferous sediments from sites 77B, 80 and 81 of the Deep Sea Drilling Project represent mixtures of pelagic clay, biogenic ooze, and a metalliferous component of hydrothermal origin. The metalliferous end-member of the sediments displays a strong inverse relationship (r = -0.88) between Mg and Mn. Mg is most likely tied up in an X-ray amorphous Mg-silicate (\"sepiolite\"), whereas Mn occurs almost exclusively in an oxide phase. Precipitation of the Mg-rich phase is favored by high flow rates and limited mixing of the hydrothermal end-member (source of silica) with seawater (source of Mg). Under those conditions much of the hydrothermal Mn(2+), with its slow oxidation kinetics, may escape to the free water column. In contrast, in highly-diluted hydrothermal fluids, which provide a source solution for Mn-rich sediments, dissolved silica is diluted below saturation with respect to \"sepiolite\". The separation of the Mn and Mg phases may be further compounded by hydraulic fractionation.","descriptionType":"Abstract"},{"description":"Supplement to: Bloch, Salman (1981): Antipathetic magnesium-manganese relationship in basal metalliferous sediments. Chemical Geology, 33(1-2), 101-113","descriptionType":"Other"}],"geoLocations":[{"geoLocationBox":{"eastBoundLongitude":"-113.809","northBoundLatitude":"1.4415","southBoundLatitude":"-0.962","westBoundLongitude":"-133.2283"}},{"geoLocationPlace":"North Pacific/HILL"},{"geoLocationPlace":"South 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