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Analysis of Mn-nodules from Breitgrund, Baltic Sea
The usually high concentrations of Zn, Pb, Cd, and Cu in the most recently accreted portions of ferromanganese nodules from the western Baltic Sea are thought to reflect... -
Investigation of manganese nodules from the Southern Tasman Sea
Two manganese nodules having a high clay content, a low Mn/Fe ratio, and low contents of valuable metals (Ni 0.25%, Cu 0.17%, Co 0.06%) were recovered in a grab sample during a... -
Structure and chemistry of TECHNO encrustations
Using as a starting point the results giving 'traditional' growth rates as determined by the decrease of radioelements (part I) and the hypothesis of rapid formation, the... -
TECHNO encrustation description and analysis
The distribution of radioactivities in a large polymetallic encrustation (TECHNO) sampled from the Pacific sea floor has been studied in great detail. The study includes... -
Geochemistry of manganese nodules from a British Columbia fjord
Concretions of iron and manganese oxides and hydrous oxidesóobjects commonly called manganese nodulesóare widely distributed not only on the deep-sea floor but also in shallow... -
Geochemistry of a manganese nodule from the WALDA (R/V Jean Charcot) expedition
During the 1971 WALDA expedition of the R/V Jean Charcot in the Equatorial and South Atlantic, manganese nodules were recovered at Station 24 - DS 17 at the base of the... -
Documentation of manganese nodules form the northwest Indian Ocean
Microscopic and electron probe examination of some manganese nodules show that they consist of segregations of manganese-iron oxides in an interstitial material almost free of... -
Analysis of manganese nodules in lakes of Scotland
During the "Challenger" Deep-Sea Exploring Expedition a great many peculiar-looking manganese nodules or concretions were dredged from the floor of the ocean at great depths,... -
Geochemistry on ferromanganese crusts and nodules from Green Bay, Lake Michigan
The differential solubility of ferromanganese oxides can lead to stratigraphic separation of iron and manganese. Results of chemical analysis of a sequence of ferromanganese... -
Geochemistry of Lake Michigan manganese nodules
Manganese nodules, similar in composition to other freshwater and shallow marine nodules, occur on the sediment surface of green bay and northern lake Michigan. Samples have... -
Composition of Mn-oxide crusts from the south-west Pacific island arc
Hydrothermal deposits of a wide variety of types are being found with increasing frequency on or near actively spreading mid-ocean ridges. However, they also have a potential to... -
Geochemistry of igneous rocks recovered from a transect across the Mariana Tr...
Major and trace element analyses are presented for 110 samples from the DSDP Leg 60 basement cores drilled along a transect across the Mariana Trough, arc, fore-arc, and Trench... -
Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B
This study presents a high-resolution record of osmium and thallium isotopes in a ferro-manganese (Fe-Mn) crust from the Indian Ocean, Antipode 109D-C. These results, when... -
Shell-based chronologies for the Irish Sea
We demonstrate here that the growth increment variability in the shell of the long-lived bivalve mollusc Arctica islandica can be interpreted as an indicator of marine... -
Geochemical data derived from an absolutely dated shell-based chronology for ...
The identification in various proxy records of periods of rapid (decadal scale) climate change over recent millennia, together with the possibility that feedback mechanisms may... -
Microfossils and chemical elements in bottom sediments of the Ashadze-1 Hydro...
The first thorough analysis of microfossils from ore-bearing sediments of the Ashadze-1 Hydrothermal Field in the Mid-Atlantic Ridge sampled during Cruise 26 of R/V Professor... -
Geochemistry of Atlantis Massif serpentinites
The Lost City hydrothermal system at the southern Atlantis Massif (Mid-Atlantic Ridge, 30°N) provides a natural laboratory for studying serpentinization processes, the temporal... -
Chemical composition in phosphate materials from the ocean floor
Content, distribution patterns, and speciation of Cl in phosphorites and bone phosphate from the ocean floor, as well as in a set of samples from the land are studied. Total Cl... -
Geochemistry of volcanic rocks from the Hikurangi and Manihiki Plateaus
Here we present the first radiometric age data and a comprehensive geochemical data set (including major and trace element and Sr-Nd-Pb-Hf isotope ratios) for samples from the... -
Composition of phosphorites from continental margins, seamounts, and islands
Behavior of molybdenum and manganese is studied in phosphorite samples from shelves, seamounts, and islands of the ocean. In shelf phosphorites molybdenum and manganese contents...