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Composition of Cape Leeuwin Manganese nodule deposit off Western Australia
In 1970 a large deposit of ferromanganese nodules was discovered on the floor of the Indian Ocean southwest of Cape Leeuwin by the research vessel USNS Eltanin. This discovery,... -
Geochemistry of some manganese nodules
The manganese nodules occur in greater or less quantity all over the ocean-bed, and most abundantly in the Pacific. They occur in all sizes, from minute grains to masses of a... -
(Table 2, page 725) Solid phase chemistry of ferromanganese precipitates from...
Sediments associated with freshwater ferromanganese concretions in Lake Charlotte, Nova Scotia, contained microscopic precipitates of manganese and iron. These precipitates were... -
(Table, page 500) Geochemistry of a pancake-shaped concretion from lake Charl...
A pancake-shaped concretion from Ship Harbour Lake, a small freshwater lake in eastern Nova Scotia (now named Lake Charlotte) is part of collection sent to the National Museum... -
(Table 11-I, page 338) Metal contents (%) of a representative sampling of man...
Two types of deep-sea dredges are currently under development for the mining of the manganese nodules, a deep-sea hydraulic dredge and a mechanical cable-bucket system. Both... -
(Table 1) Contents of tungsten and other metals in Fe-Mn nodules from the Pac...
Tungsten contents in iron-manganese nodules and crusts from different parts of the World Ocean, as well as its relationships with a number of chemical elements are under... -
(Table 2) Chemical composition of Fe-Mn nodules and volcanic glass in sedimen...
Distribution pattern of titanium in Quaternary sediments of the Atlantic Ocean are examined on the base of 750 Ti and Fe determinations, and several dozen of complete chemical... -
Pacific, Indian and Atlantic ocean manganese nodules and crusts analyzed at S...
The Marine Minerals Database contains geochemical analyses and auxiliary information on present-day marine deposits of primarily ferromanganese nodules and crusts. Some data for... -
Relationships between the Fe-Mn deposits from the Romanche Trench and its hyd...
The geological characteristics and Fe-Mn deposits from the North wall of the Romanche trench (Atlantic ocean) were studied in order to investigate possible relationships of... -
Accumulation rates of manganese in pelagic sediments and nodules
Accumulation rates of manganese in sediments of thirty-eight deep-sea cores range from 0.1 to 3.4 mg/cm²/ka. Manganese accumulation rates in five nodules range from 0.2 to 1.0... -
Detailed mineralogy and chemical composition of manganese nodules retrieved f...
The structure of the principal manganese minerals of the nodules, todorokite and birnes- site, is determined by the structure of hydrated manganese dioxide. Using this fact and... -
Morphology and chemical composition of ferromanganese deposits in the Southwe...
An extensive field of iron-rich, nickel- and copper-poor manganese nodules covers the deep sea-floor of the northeastern quadrant of the Southwestern Pacific Basin, and the... -
Chemical composition of deep sea manganese deposits determined at Kennecott C...
During the 1967-1968 period chemical analysis of both major and trace elements was performed on manganese nodules, crusts and micronodules on a large number of cores taken by... -
Rare earth element composition of manganese nodules and micronodules from the...
The shale-normalized REE patterns of manganese nodules from the northwest Atlantic show enrichment in Sm and Eu relative to the heavier and lighter REE, excluding Ce, and are... -
Growth of a manganese nodule from Peru Basin: A radiochemical anatomy
Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th,... -
Chemical composition of the 2 opposites sides of a deep-sea manganese-nodule ...
We discuss the differences in chemical composition between the two opposite sides of a deep-sea manganese nodule. The upper side, facing sea water, contains a hydrogeneous... -
Geochemistry on sediment and nodules from the Madeira Abyssal Plain
The accretion rate of manganese nodules and the sedimentation rate of the underlying sediment has been studied with 10Be and 14C on a nodule covered hill in the Madeira Abyssal... -
Radionuclides in Manganese nodules
Manganese nodules are considered to have accumulated in general very slowly: surface layers of nodules contain a large excess of 230Th, more than would be produced by uranium... -
Description and composition of Manganese deposits from the Mid-Atlantic Ridge
Iron-rich sediments similar to those forming on other active mid-oceanic ridges have been found in the Median Valley of the Mid-Atlantic Ridge near 45 °N. The sediments are... -
Geochemistry on manganese nodules from the Southern Ocean
Manganese nodules from the Scotia Sea and Pacific Ocean sectors of the Southern Ocean display regional differences in chemical and mineralogical composition. Mn/Fe and...