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Cronan, David S; Galacz, A; Mindeszenty, A; Moorby, S A; Polgari, M (1991): (Table 1, page 661) Average composition of fossil nodules from three localities studied in the Transdanubian Central Mountains of Hungary. PANGAEA, https://doi.org/10.1594/PANGAEA.858466, Supplement to: Cronan, DS et al. (1991): Tethyan ferromanganese oxide deposits from Jurassic rocks in Hungary. Journal of the Geological Society, 148(4), 655-668, https://doi.org/10.1144/gsjgs.148.4.0655

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Abstract:
Fossil manganese nodules and encrustations from seamount' and basin' localities in the Transdanubian Central Mountains of Hungary are lithologically, mineralogically and chemically similar to some modern marine ferromanganese oxide deposits, and show no evidence of postdepositional changes other than cementation. Five groups of deposits were encountered: Fe/Mn nodules, encrusted shells, pavements, stains, and Fe oxide encrusted intraclasts, the first three of which are specific to the 'seamount' environment and the last to the basins'. Optical and electron microprobe investigation of the samples shows them to exhibit many similarities with modern ferromanganese oxide deposits, and that many of the nodules are surrounded by a halo of dispersed ferromanganese oxides, strongly suggesting that they continued to accrete metals through the pore waters of unlithified sediments for a period after burial. By contrast, pavements which appear to have grown on hardgrounds at the sea floor show little or no evidence of derivation of metals from underlying sediments. Geochemical investigations on the deposits show the seamount' varieties to be closer in composition to most modern nodules and crusts than the basin' varieties, and that the latter are essentially manganese and trace-element-poor ferruginous deposits. Nevertheless, all can be more or less compositionally equated with modern ferromanganese oxide deposits forming in marginal Atlantic environments, which would be in accord with the proposed depositional environment of the Transdanubian Central Mountains based on other evidence.
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, https://doi.org/10.7289/V52Z13FT
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN
Coverage:
Median Latitude: 47.404830 * Median Longitude: 18.124108 * South-bound Latitude: 47.211648 * West-bound Longitude: 17.800762 * North-bound Latitude: 47.715674 * East-bound Longitude: 18.469906
Minimum DEPTH, sediment/rock: 1.50 m * Maximum DEPTH, sediment/rock: 7.00 m
Event(s):
CRNHG1 * Latitude: 47.211648 * Longitude: 17.800762 * Elevation: 412.0 m * Location: Harskut, Hungary * Device: Hammer (HAM)
CRNHG2 * Latitude: 47.287168 * Longitude: 18.101656 * Elevation: 377.0 m * Location: Tuzkoves Arok, Hungary * Device: Hammer (HAM)
CRNHG3 * Latitude: 47.715674 * Longitude: 18.469906 * Elevation: 256.0 m * Location: Tardosbanya-Banyahegy, Hungary * Device: Hammer (HAM)
Comment:
Compositions are recalculated carbonate free. Samples were reduced to powder and leached in acid.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventCronan, David S
2IdentificationIDCronan, David S
3DEPTH, sediment/rockDepthmCronan, David SGeocode
4PotassiumK%Cronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
5BerylliumBemg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
6MagnesiumMg%Cronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
7AluminiumAl%Cronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
8LanthanumLamg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
9TitaniumTimg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
10VanadiumVmg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
11ChromiumCrmg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
12ManganeseMn%Cronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
13IronFe%Cronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
14CobaltComg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
15NickelNimg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
16CopperCumg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
17ZincZnmg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
18LeadPbmg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
19PhosphorusPmg/kgCronan, David SICP-AES, Inductively coupled plasma - atomic emission spectroscopy
20TypeTypeCronan, David S
21Sediment typeSedimentCronan, David S
22Geologic ageGeologic ageCronan, David S
23DescriptionDescriptionCronan, David S
Size:
63 data points

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