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    PANGAEA
    In:  Supplement to: Leclaire, Lucien; Perseil, E A (1979): Minéralogie, composition chimique et milieux de sédimentation de concrétions polymétalliques dans l'océan Indien = Mineralogy, chemical composition and sedimentation environment of manganese nodules from Indian Ocean. In: Lalou, C (Ed) La Genèse des nodules de manganèse. Centre National de la recherche Scientifique (CNRS), Gif-sur-Yvette, France, 23-37, hdl:10013/epic.46398.d001
    Publication Date: 2024-02-29
    Description: Mineralogical analysis of manganese nodules and crusts collected from Indian ocean aboard Marion Dufresne points to a depth and regional control upon the manganese oxide association: vernadite - birnessite and vernadite - todorokite. Moreover, progressive changes in the vernadite/birnessite ratio as a function of time is clearly seen. Magnetite and titano-magnetite in quantities similar to those of framboidal pyrite in manganese nodules are outlined for the first time. Study of the distribution of metals (Mn, Fe, Ni, Cu, Co) shows a strong latitudinal and regional dependence that may be connected to high productivity zones and to bottom water properties. The problem of mineralogical control on the chemical composition is approached. Finally, it results that any interpretations taking into account all these data haveway to give to the variability of sea-water properties (pH, oxygenation, motions) the prominent control upon manganese nodules composition.
    Keywords: Aluminium; AT760004; AT760005; AT760007; AT760008; AT760010; AT760011; Calcium; Cobalt; Copper; DEPTH, sediment/rock; Description; DR760013; DR760014; DR760015; DR770019; Dredge; DRG; Elevation of event; Event label; Grab; GRAB; Identification; Indian Ocean; Insoluble residue; Iron; Latitude of event; Lead; Longitude of event; Magnesium; Manganese; Marion Dufresne (1972); MD00; MD 00-45-DR; MD06; MD 06-27-DR; MD 06-28-DR; MD 06-29; MD 06-30-DR; MD 06-32-DR; MD 06-33-DR; MD 06-35-DR; MD 06-36-DR; MD09; MD09-06B; MD09-12B; MD09-21B; MD09-23B; MD09-26; MD09-27; MD09-34C; MD09-36A; MD09-40B; MD09-41B; MD14; MD14-02CX; MD14-03CX; MD14-05CX; MD14-07CX; MD14-08CX; MD14-27CX; MD14-2A; MD14-2C; MD14-35A; MD14-5B; MD-AT770017; MD-AT770018; MD-DR730004; MD-DR750006; MD-DR750007; MD-DR750008; MD-DR750009; MD-DR750010; MD-DR750011; MD-DR750012; MD-DR770016; MD-DS750001; NEMROD; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; NOSICAA; OSIRIS I; PC; Piston corer; PL770002 (EL 2-6); PL770003 (EL 6-11); PL770004 (EL 12-18); PL770005 (EL 19-28); PL770006 (EL 29-37); PL770007 (EL 48-56); PS760109; Sample code/label; SESAM; Silicon dioxide; Wet chemistry; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 652 data points
    Location Call Number Expected Availability
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