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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... -
Documentation of manganese nodules in some finish lakes
The paper gives a detailed study of the iron-manganese ores found in the lakes of Western Finland. From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals... -
Analysis of Manganese nodules from the Challenger Expedition
Manganese nodules from Stations 252 and 281 of the Challenger Expedition, collected in 1875, have recently been discovered in the Redpath Museum. The nodules have been found to... -
Manganese deposits from the HMS Challenger stations
This Monograph on Deep-Sea Deposits forms the penultimate volume of the Official Reports on the Scientific Results of the Challenger Expedition. The work connected with the... -
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 manganese nodules from Loch Fyne, Scotland
Manganese nodules and manganese carbonate concretions occur in the upper 10-15 cm of the Recent sediments of Loch Fyne, Argyllshire in water depths of 180-200 m. The nodules are... -
Geochemistry on manganese deposit from the Median Valley of the Mid-Atlantic ...
A manganese oxide crust from an extensive deposit in the median valley of the Mid-Atlantic Ridge was found to be unusually high in manganese (up to 39.4% Mn), low in Fe (as low... -
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... -
Geochemistry of manganese nodules from the N.W. Indian Ocean
Manganese nodules collected from four sites in the N.W. Indian Ocean by R.R.S. Discovery have been analysed for a range of elements. At two of the sites, samples were collected... -
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... -
On the composition of oceanic and littoral manganese nodules (published onlin...
The following analyses were made some years ago, principally with the object of ascertaining the state of oxidation of the manganese in the nodules. The nodules examined came... -
Occurrence and geochemistry of lake-bottom manganiferous deposits in Canadian...
It is the purpose of this paper to record information concerning the distribution and occurrence of manganiferous concretions and other manganese oxide deposits that develop on... -
Geochemistry and isotopes at DSDP Site 68-503
Nodules occur in the siliceous calcareous ooze and siliceous marl at Site 503 in the eastern equatorial Pacific. They are present below a depth of about 11 meters throughout the... -
Lead and strontium isotopic composition of some metalliferous and pelagic sed...
In recent years, metalliferous sediments have been discovered overlying newly generated oceanic crust in the East Pacific, North Atlantic, Indian Ocean, Red Sea, Gulf of Aden,... -
Geochemistry, minerals and b-parameter at DSDP Leg 70 Holes
Clay minerals recovered from the Galapagos hydrothermal mounds (Holes 506C, 507D, and 509B) are mainly iron-rich nontronite-like minerals enriched in potassium. Nontronites from... -
Geochemistry at DSDP Holes 80-550 amd 80-548
At Sites 548 and 550 of DSDP Leg 80 several condensed sedimentary sections contain various types of polymetallic crusts. The relationships between mineralogic and geochemical... -
Heavy metal contents in Fe-Mn nodules and crusts from R/V Vityaz polygons and...
Regional variations in abundance, morphology, and chemical composition of Fe-Mn nodules have a zonal character. Due to circumcontinental zonality of terrigenous sedimentation... -
Composition of hydrothermal manganese oxide deposits from Galapagos mounds, D...
During DSDP Leg 70, a 1.60 m thick manganese oxide layer was sampled in hole 509B. This deposit is formed of alternating layers of hard plates of pure todorokite, about 2 mm... -
Elemental and isotopic compositions of metalliferous and pelagic sediments fr...
Nontronite, the main metalliferous phase of the Galapagos mounds, occurs at a subsurface depth of ~2–20 m; Mn-oxide material is limited to the upper 2 m of these mounds. The...
