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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... -
Annotated record of the detailed examination of Mn deposits from R/V Eltanin ...
Cores, submarine photography and dredges described in this report were taken during the R/V Eltanin Cruise 17 in 1965 by the Department of Geology, Florida State University.... -
Annotated record of the detailed examination of Mn deposits from R/V Eltanin ...
Cores, submarine photography and dredges described in this report were taken during the R/V Eltanin Cruise 15 in 1964 by the Department of Geology, Florida State University.... -
Accumation rates of manganese in manganese nodules using differential 230Th-2...
The manganese content of 7 manganese nodules was determined by neutron activation. The decrease of unsupported 231Pa and 230Th in the outer few tenths of millimeters was used to... -
Accumation rates of manganese in pelagic sediments using Brunnes-Matuyama mag...
For 27 pelagic sediment cores, the Brunnes-Matuyama magnetic reversal boundary (700 000 yr) was used to establish the mean sedimentation rate between this level and the core... -
Minor and rare-earth elements concentration in manganese nodules and micronod...
Digitized Table 2 (REE) of the unpublished report.--From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical... -
Various chemical elements concentration in manganese nodules, crusts and micr...
Digitized Table 2 of the unpublished report.--From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports... -
Main metal elements concentration in manganese nodules, crusts and micronodul...
Digitized Table 1 of the unpublished report.--From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports...