Ito, Takashi; Komuro, Kosei; Hatsuya, K; Nishi, Hiroshi (2005): Chemical composition of ferromanganese micronodules and bulk sediments from ODP Hole 199-1216A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.777013, Supplement to: Ito, T et al. (2005): Chemical compositions of ferromanganese micronodules in sediments at Site 1216, ODP Leg 199, Paleogene equatorial transect. In: Wilson, PA; Lyle, M; Firth, JV (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 199, 1-20, https://doi.org/10.2973/odp.proc.sr.199.211.2005
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Abstract:
Distribution, size, mineral, and chemical compositions of ferromanganese micronodules (FMMNs) and chemical composition of host sediments were examined in a series of red clay samples with ages from Eocene to the present at Ocean Drilling Program Leg 199, Site 1216, south of the Molokai Fracture Zone in the Central Pacific Basin.
The number of FMMNs changed drastically throughout the 40-m-long red clay intervals. FMMNs are abundant in the upper 9 m of core, decrease between 9 and 25 meters below seafloor (mbsf) with depth, and are very rare from 30 to 40 mbsf. Chemical composition of FMMNs showed high Mn/Fe ratios and Ni and Cu contents and a distinct positive Ce anomaly because of the existence of buserite. This suggests that FMMNs in the red clay from 25 mbsf to the top of the cored interval were deposited continuously in an oxic diagenetic bottom environment. The red clay below 30 mbsf with higher Mn contents contains few FMMNs but abundant tiny Mn particles within brown silicates coated by Fe (oxy-hydro)oxides. This indicates that the mode of manganese deposition changed between 25 and 30 mbsf.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 21.452710 * Longitude: -139.479850
Date/Time Start: 2001-11-05T00:00:00 * Date/Time End: 2001-11-05T00:00:00
Event(s):
199-1216A * Latitude: 21.452710 * Longitude: -139.479850 * Date/Time: 2001-11-05T00:00:00 * Elevation: -5152.5 m * Penetration: 62.2 m * Recovery: 56.47 m * Location: North Pacific Ocean * Campaign: Leg199 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 11 core; 62.2 m cored; 0 m drilled; 90.8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Ito, T; Komuro, K; Hatsuya, K et al. (2005): (Table T1) Chemical composition of ferromanganese micronodules from ODP Hole 199-1216A. https://doi.org/10.1594/PANGAEA.777010
- Ito, T; Komuro, K; Hatsuya, K et al. (2005): (Table T2) Chemical composition of bulk sediments from ODP Hole 199-1216A. https://doi.org/10.1594/PANGAEA.777012