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Analysis of ferromanganese deposits from the Northwestern Pacific seamounts
Fine-scale dating is crucial to understanding the growth and environments of formation of marine manganese deposits. The paleomagnetic method of dating of manganese nodules and... -
Analysis of manganese nodules from the Atlantic
Concentrations of the rare earths have been determined in ten modern manganese nodules from the Atlantic, Pacific, and Indian Oceans, the Baltic Sea, and Lake Charlotte in Nova... -
Analysis of Mn-deposits from the Pacific
Crusts composed of nontronite and ferromanganese oxides were recovered from Explorer Ridge, a spreading ridge segment in the northeastern Pacific Ocean located off the west... -
Description of the Manganese Collection at HIG
The properties of ferromanganese concretions reflect in many ways the marine environment in which they were formed, and points to a variety of probable genetic mechanisms in... -
Analysis of Manganese deposits from the South China Sea
In the northern South China Sea, the accumulation of enormous quantities of terrigenous sediment during Cenozoic rendered well-developed polymetallic nodules very rare. In this... -
Analysis of Mn-nodules from the Alps
The nodules from the Briançon area in the French Alps show two types of cauliflower shaped botryoidal growth. One could be diagenetic and the other purely chemical. They could... -
Analysis of Mn-deposits from the Alps
In the aftermath of the Triassic?Jurassic extinction event, extant slopes of drowned alpine reef buildups were recolonized in patches by predominantly non-rigid sponges. Just a... -
Analysis of ferromanganese deposits from Mallorca, Spain
The geochemistry of ferromanganese crusts and iron pisoliths from the Jurassic of Mallorca is investigated. The deposits are associated with Toarcian condensed sequences and... -
Analysis of Mn-deposits from the Alps
Near Weissbach - Diessbach southeast of Lofer (Salzburg, Austria), at the western rim of the Steinernes Meer (Northern Calcareous Alps), the sedimentary sequence of a local... -
Analysis of clay and Mn deposits from the Pacific
The concentrations of Sc, Ti, Fe, Mn, Co, Ni, Cu, La, Th and U have been measured in several Pacific pelagic clays having widely different accumulation rates, 0.4-9.0 mm/103 yr.... -
Analysis of Mn-crusts from Dove Ridge
Dove Basin is situated in the south-central Scotia Sea, between Pirie and Bruce banks, and was formed during the development of the Scotia Arc. The basin has a roughly sigmoidal... -
Analysis of Mn-deposits recovered during Leg 54
Two distinct sedimentary facies produced by sea-floor hydrothermal activity were cored during Deep Sea Drilling Project Leg 54. The first is equivalent to the typical basal... -
Analysis of Mn-rich basalt from Leg 51
The successful drilling on Legs 51, 52, and 53 created a rare opportunity to investigate the long-term effects of seawater-rock interactions on the mineralogy and chemistry of... -
Analysis of Mn-nodules from Leg 51
Rhodochrosite crystals and manganese oxide micronodules which have formed in situ are found in abundance at depth (76.5 to 106.5 m) in Hole 417A. A gradual transformation of the... -
Analysis of Mn deposits from Galicia Bank Leg 47
This report deals with results of the first stage of a complex study of the predominantly Lower Cretaceous sediments cored at Site 398 at depths from 945 to 1740 meters. The... -
Analysis of 10Be and Th isotopes in manganese nodules
The usefulness of cosmogenic beryllium-10 (half life = 2.5 Ma) for studying the rates of accumulation of ferromanganese nodules is reported based on its measured depth... -
Analysis of manganese deposits from the Alps
Deposits with unusually high Mn contents sampled at Monte Mangart in the Julian Alps include organic-rich marlstone and black shale with interbedded manganoan and siliceous... -
Analysis of manganes nodules from the Antarctic Ocean
Five nodules collected on Leg 28 of the Deep Sea Drilling Project are unique in that they provide an opportunity of studying older, buried nodules. Paleontological evidence from... -
Analysis of spherules from Pacific Ocean sediments
Metallic spherules from Central Pacific Ocean sediments (“Valdivia” expedition VA-05/1, 1973) were studied by means of microscopy and by electron microprobe analysis. The data... -
Analysis of manganese nodules from Lake Baikal
Although ferromanganese crusts from shallow depths in Lake Baykal have been described previously, the presence of nodules at depths of about 500 m are a new discovery made...