The degree of enrichment of elements in manganese nodules relative to seawater varies
considerably. Elements showing tile greatest enrichment (Mn, Fe, Ce, Pb and Co) are all …

The presence of organic material in some manganese-rich nodules suggests that the
nodules are of biological origin. This suggestion leads to the proposal that in sea water …

Heavy metals are one of the most toxic forms of environmental pollutants, constituting a
threat both to aquatic life and the quality of drinking water. By analyzing lake sediments, it is …

Fishing and offshore oil drilling are still the most significant of man's efforts to tap the
resources of the 70 percent of the earth covered by oceans, al-though minerals such as salt …

A criterion is suggested for discrimination between ferromanganese oxide minerals,
deposited after the introduction of manganese and associated elements in sea water …

The grade of copper and nickel in manganese nodules is negatively correlated with their
abundance on the sea floor, within small regions and in the Pacific Ocean as a whole …

That manganese nodules and adjacent deep-sea sediments are accumulating manganese
at almost the same rate has been established by thorium-230 dating of both sediments and …

The Ginsheimer Altrhein-a cut-off channel of the t~ hine River in the vicinity of Mainz-
appears to be one of the waterways in Western Germany most strongly contaminated with …

In an earlier paper by 2 of the authors the conclusion was reached that the 33 recognized
species of oxides of Mn could be separated into 3 groups: 1) those which appeared to be …

MANGANESE nodules were investigated during the Downwind Expedition, a part of the
International Geophysical Year programme of the Scripps Institution of Oceanography of the …