von Stackelberg, Ulrich (1997): (Table 2, page 158) Characteristics of manganese nodule assemblages from box grabs and free-fall grabs from the SEDIPERU areas A1 and A2, SONNE cruise SO79 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856994, Supplement to: von Stackelberg, U (1997): Growth history of manganese nodules and crusts of the Peru Basin. In: Nicholson, K., Hein, J.R., Bühn, B., Dasgupta, P. (Eds.), Manganese Mineralization: Geochemistry and Mineralogy of Terrestrial and Marine Deposits, Geological Society, London, Special Publications, 119(1), 153-176, https://doi.org/10.1144/GSL.SP.1997.119.01.11
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Abstract:
In the nodule field of the Peru Basin, situated south of the zone of high bioproductivity, a relatively high flux of biogenic matter explains a distinct redox boundary at about 10 cm depth separating very soft oxic surface sediments from stiffer suboxic sediments. Maximum abundance (50 kg/m**2) of diagenetic nodules is found near the calcite compensation depth (CCD), currently at 4250 m. There, the accretion rate of nodules is much higher (100 mm/Ma) than on ridges (5 mm/Ma). Highest accretion rates are found at the bottom of large nodules that repeatedly sink to a level immediately above the redox boundary. There, distinct diagenetic growth conditions prevail and layers of dense laminated Mn oxide of very pure todorokite are formed. The layering of nodules is mainly the result of organisms moving nodules within the oxic surface sediment from diagenetic to hydrogenetic environments. The frequency of such movements is much higher than that of climatic changes. Two types of nodule burial occur in the Peru Basin. Large nodules are less easily moved by organisms and become buried. Consequently, buried nodules generally are larger than surface nodules. This type of burial predominates in basins. At ridges where smaller nodules prevail, burial is mainly controlled by statistical selection where some nodules are not moved up by organisms.
Source:
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
Project(s):
Coverage:
Median Latitude: -7.449863 * Median Longitude: -90.599426 * South-bound Latitude: -8.781700 * West-bound Longitude: -90.912300 * North-bound Latitude: -6.463300 * East-bound Longitude: -90.297500
Date/Time Start: 1992-04-25T00:00:00 * Date/Time End: 1992-05-29T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
SO79_1KG (GIK15555-1) * Latitude: -6.463300 * Longitude: -90.399800 * Date/Time: 1992-04-25T00:00:00 * Elevation: -4119.0 m * Recovery: 0.55 m * Location: Peru Basin * Campaign: SO79 (SEDIPERU - TUSCH) * Basis: Sonne * Method/Device: Box corer (Reineck) (BCR) * Comment: GPS, Mn nodules
SO79_10KG (GIK15556-1) * Latitude: -6.713300 * Longitude: -90.725800 * Date/Time: 1992-04-28T00:00:00 * Elevation: -3961.0 m * Recovery: 0.45 m * Location: Peru Basin * Campaign: SO79 (SEDIPERU - TUSCH) * Basis: Sonne * Method/Device: Box corer (Reineck) (BCR) * Comment: GPS, Mn nodules
Comment:
Nodule density and mass abundance was deduced from nodules retrieved by box corer (KG) of 0.25 m**2 or free-fall grab (BG) of 0.133 m**2 impacts.
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 proprietary 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.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | von Stackelberg, Ulrich | |||
| 2 | Date/Time of event | Date/Time | von Stackelberg, Ulrich | |||
| 3 | Latitude of event | Latitude | von Stackelberg, Ulrich | |||
| 4 | Longitude of event | Longitude | von Stackelberg, Ulrich | |||
| 5 | Elevation of event | Elevation | m | von Stackelberg, Ulrich | ||
| 6 | Sample ID | Sample ID | von Stackelberg, Ulrich | |||
| 7 | DEPTH, sediment/rock | Depth sed | m | von Stackelberg, Ulrich | Geocode | |
| 8 | Nodules, density | Nodules | #/m2 | von Stackelberg, Ulrich | ||
| 9 | Nodules, mass abundance | Nodules | kg/m2 | von Stackelberg, Ulrich | ||
| 10 | Number | n | # | von Stackelberg, Ulrich | nodules of half-cylindrical shape (Shape-C2) | |
| 11 | Number | n | # | von Stackelberg, Ulrich | nodules of discoidal shape (Shape-D) | |
| 12 | Number | n | # | von Stackelberg, Ulrich | nodules of ellipsoidal shape (Shape-E) | |
| 13 | Number | n | # | von Stackelberg, Ulrich | nodules of half-ellipsoidal shape (Shape-E2) | |
| 14 | Number | n | # | von Stackelberg, Ulrich | nodules of irregular shape (Shape-I) | |
| 15 | Number | n | # | von Stackelberg, Ulrich | nodules of irregularly discoidal shape (Shape-ID) | |
| 16 | Number | n | # | von Stackelberg, Ulrich | nodules of irregularly ellipsoidal shape (Shape-IE) | |
| 17 | Number | n | # | von Stackelberg, Ulrich | nodules of irregularly Spherical shape (Shape-IS) | |
| 18 | Number | n | # | von Stackelberg, Ulrich | nodules of polylobate shape (Shape-P) | |
| 19 | Number | n | # | von Stackelberg, Ulrich | nodules with a volcanic material core (nucleus) (Core-B) | |
| 20 | Number | n | # | von Stackelberg, Ulrich | nodules with a nodule fragments core (nucleus) (Core-N) | |
| 21 | Number | n | # | von Stackelberg, Ulrich | nodules with a organic remains core (nucleus) (Core-O) | |
| 22 | Number | n | # | von Stackelberg, Ulrich | nodules with a Mn-impregnated sediment core (nucleus) (Core-SI) | |
| 23 | Number | n | # | von Stackelberg, Ulrich | nodules with a consolidated sediment core (nucleus) (Core-S) | |
| 24 | Number | n | # | von Stackelberg, Ulrich | nodules with a hydrothermal material material core (nucleus) (Core-Y) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
681 data points