Comparative geochemistry of Mn nodules and micoodules from of the Gulf of Mexico, the Atlantic and the Pacific oceans

doi:doi:10.1594/PANGAEA.948695

Comparative geochemistry of Mn nodules and micoodules from of the Gulf of Mexico, the Atlantic and the Pacific oceans

Ferromanganese microconcretions (FMC) were hand picked from four sieved size fractions (100, 200, 325 and 400 mesh) of sediment samples from four depths in a one meter gravity core taken in the Mid-Atlantic Ridge FAMOUS Area. Scanning electron microscopy and electron microprobe analysis were used to relate surface morphology and metal content to depth of burial, size fraction and apparent sediment redox conditions. Upper sediment (0-2 cm) FMC's were typified by rounded, botryoidal forms while FMC's taken from the redox boundary region (42-46 cm) showed signs of dissolution and had depressed Fe to Mn ratios (1.32 at the surface, 0.62 at 42-44 cm). Well crystallized pyritihedra were found in samples taken from the base of the core as well as in samples from the redox boundary.

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Barnard, Leo A (2022). Dataset: Comparative geochemistry of Mn nodules and micoodules from of the Gulf of Mexico, the Atlantic and the Pacific oceans. https://doi.org/10.1594/PANGAEA.948695

DOI retrieved: 2022

Additional Info

Field	Value
Imported on	November 30, 2024
Last update	November 30, 2024
License	CC-BY-4.0
Source	https://doi.org/10.1594/PANGAEA.948695
Author	Barnard, Leo A
Given Name	Leo A
Family Name	Barnard
Source Creation	2022
Publication Year	2022
Resource Type	text/tab-separated-values - filename: Barnard_1982
Subject Areas	Name: Chemistry Name: Lithosphere
Related Identifiers	Title: Marine manganese accretions: Nodule micronodule comparisons among major ocean basins Identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-346736 Type: DOI Relation: References Year: 1982 Source: Texas A & M University, College Station, Texas, U.S.A Authors: Barnard Leo A , Barnard Leo A , Scott Martha R , Grant John Bruce , Moore Carla J , Alameddin George , Chen Kuiying , Barton Mark , Warnken Robin R , Virden William T , Moore Carla J . Title: Ferromanganese microconcretions from the FAMOUS area (Abstract) Identifier: https://doi.org/10.1029/EO060i018p00230 Type: DOI Relation: References Year: 1979 Source: EOS Transactions American Geophysical Union Authors: Barnard Leo A , Barnard Leo A , Scott Martha R , Grant John Bruce , Moore Carla J , Alameddin George , Chen Kuiying , Barton Mark , Warnken Robin R , Virden William T , Moore Carla J . Title: The NOAA and MMS Marine Minerals Geochemical Database Identifier: https://doi.org/10.7289/V52Z13FT Type: DOI Relation: References Year: 1992 Source: National Geophysical Data Center, NOAA Authors: Barnard Leo A , Barnard Leo A , Scott Martha R , Grant John Bruce , Moore Carla J , Alameddin George , Chen Kuiying , Barton Mark , Warnken Robin R , Virden William T , Moore Carla J . Title: The NOAA and MMS Marine Minerals Bibliography Identifier: https://doi.org/10.7289/V53X84KN Type: DOI Relation: References Year: 1992 Source: National Geophysical Data Center, NOAA Authors: Barnard Leo A , Barnard Leo A , Scott Martha R , Grant John Bruce , Moore Carla J , Alameddin George , Chen Kuiying , Barton Mark , Warnken Robin R , Virden William T , Moore Carla J .