Annotated record of the detailed examination of Mn micronodules from stations over George Bank, Atlantic Ocean
Cobertura |
MEDIAN LATITUDE: 40.995167 * MEDIAN LONGITUDE: -67.080833 * SOUTH-BOUND LATITUDE: 40.673000 * WEST-BOUND LONGITUDE: -67.747000 * NORTH-BOUND LATITUDE: 41.233000 * EAST-BOUND LONGITUDE: -66.642000 * DATE/TIME START: 1957-08-28T00:00:00 * DATE/TIME END: 1965-08-22T00:00:00 * MINIMUM DEPTH, sediment/rock: 0 m * MAXIMUM DEPTH, sediment/rock: 0 m |
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Data(s) |
27/07/1984
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Resumo |
Ferromanganese micronodules have been found on Georges Bank, off the U.S. northeast coast, distributed throughout the surficial sediments within an area about 125 km long and at least 12 km wide. These coarse, sand-sized concretions have precipitated from metal-rich interstitial waters and contain many of the textural and structural features common to other neritic nodules. Most of the nodules have accreted around detrital grains, and X-ray powder diffraction analyses indicate the presence of geothite and vernadite ( delta -MnO sub(2)) in the ferromanganese layers. Chemical analyses of the micronodules, when compared with similar data on deep-sea manganese nodules, reveal lower Mn/Fe ratios, significantly higher concentrations of V and As, comparable values of Mo, and an order of magnitude less of Co, Ni, Ce and most other, metals. |
Formato |
text/tab-separated-values, 42 data points |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.863406 doi:10.1594/PANGAEA.863406 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Relação |
Grant, J Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, doi:10.7289/V52Z13FT Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, doi:10.7289/V53X84KN |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Poppe, L J; Commeau, RF; Commeau, JA; Manheim, Frank T; Aruscavage, P J (1984): Ferromanganese micronodules from the surficial sediments of Georges Bank. Journal of Marine Research, 42(2), 463-472, doi:10.1357/002224084788502765 |
Palavras-Chave | #AB3_101; AB3101-W167; AB3101-W169; AB3101-W180; AB4_11; AB411-2545K; Age, comment; Albatross III (1948-1959); Albatross IV (1963); Atlantic Ocean; DEPTH, sediment/rock; Description; Device of event; Dredge; DRG; Elevation of event; Event label; GOS22; GOS22-1114; GOS22-1123; Gosnold; Grab; GRAB; Identification; Latitude of event; Longitude of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sediment type; Type; Visual description |
Tipo |
Dataset |