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Rossi, P L; Bocchi, G; Adams, F (1980): (Table 2, page 110) Chemical analyses of Mn crust samples from the Lametino Seamount in the Tyrrhenian Sea. PANGAEA,, Supplement to: Rossi, PL et al. (1980): A manganese deposit from the South Tyrrhenian region. Oceanologica Acta, 3(1), 107-114, hdl:10013/epic.46892.d001

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Specimens dredged from within the summit of a volcanic seamount during an oceanographic cruise in the Eolian Island Arc (South Tyrrhenian Sea) where examined. Mineralization, which forms veins and pockets within a silty-clayey material, consists mainly of todorokite with scarce birnessite. The chemistry (Mn 48%, Fe 0.26 %, Ni 249 ppm, Co 223 ppm) and the mineralogy of the deposit are discussed; the findings, compared with data from some of the literature, suggest a hydrothermal genesis with extreme fractionations of Mn from Fe. A process explaining the anomalous Cu content (8 200 ppm) of the deposit is also suggested.
Source data set:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA,
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA,
Latitude: 39.055030 * Longitude: 15.396130
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 0.0 m
BAN-T78L * Latitude: 39.055030 * Longitude: 15.396130 * Elevation: -862.0 m * Location: Lametino 1 Seamount * Campaign: T78 * Basis: Bannock * Method/Device: Dredge (DRG)
From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a propriatory format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1IdentificationIDRossi, P L
2DEPTH, sediment/rockDepthmRossi, P LGeocode
3ManganeseMn%Rossi, P LX-ray fluorescence (XRF)
4IronFe%Rossi, P LX-ray fluorescence (XRF)
5SodiumNa%Rossi, P LSpectrophotometry
6MagnesiumMg%Rossi, P LX-ray fluorescence (XRF)
7AluminiumAl%Rossi, P LX-ray fluorescence (XRF)
8SiliconSi%Rossi, P LX-ray fluorescence (XRF)
9PotassiumK%Rossi, P LSpectrophotometry
10CalciumCa%Rossi, P LX-ray fluorescence (XRF)
11TitaniumTi%Rossi, P LX-ray fluorescence (XRF)
12Loss on ignitionLOI%Rossi, P LX-ray fluorescence (XRF)Loss at ignition was computed for a dessication temperature of 1000 °C
13VanadiumVmg/kgRossi, P LX-ray fluorescence (XRF)
14CobaltComg/kgRossi, P LX-ray fluorescence (XRF)
15NickelNimg/kgRossi, P LX-ray fluorescence (XRF)
16CopperCumg/kgRossi, P LX-ray fluorescence (XRF)
17ZincZnmg/kgRossi, P LX-ray fluorescence (XRF)
18RubidiumRbmg/kgRossi, P LX-ray fluorescence (XRF)
19StrontiumSrmg/kgRossi, P LX-ray fluorescence (XRF)
20MolybdenumMomg/kgRossi, P LX-ray fluorescence (XRF)
21BariumBamg/kgRossi, P LGravimetric analysis
22Deposit typeDeposit type
24Substrate typeSubstrate
24 data points

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