8 research outputs found
Influence of provenance, weathering, and sedimentary processes on the elemental ratios of the fine-grained fraction of the bedload sediments from the Vembanad Lake and the adjoining continental shelf, southwest coast of India
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Sedimentary processes controlling the geochemistry of recently deposited clay sediments from Vembanad Lake and the adjoining continental shelf, a tropical coastal environment on the southwest coast of India
No full textThe distribution of rare earth and minor elements in manganese nodules, micronodules and sediments along an east-west transect in the southern Pacific
No full textMineralogy and Composition of Manganese Crusts and Nodules and Sediments from the Manihiki Plateau and Adjacent Areas: Results of HMNZS Tui Cruises
No full textForty-four sediment samples and 23 Mn crusts and Mn nodules have been analyzed for several elements in order to characterize their geochemical nature. Most of the Mn crusts and Mn nodules are of hydrogenous origin, although one dust (U375) from the flanks of the Rarotonga volcano is thought to be of hydrothemal origin. delta-MnO2 is the principal Mn mineral in the crusts, whereas todorokite and bimessite occur in addition to delta-MnO2 in the nodules. The sediments can be divided into carbonates, with calcite as the dominant phase, and deep-sea clay, consisting mainly of illite and smectite
