Combining the culture work, T-RFLP data and the in situ protein data we have strong …Web

Iron-manganese banding in Oneida Lake ferromanganese nodules Willard S. Moore Department of Geology, University of South Carolina, Columbia, South Carolina 29208, USAWeb

It remains unclear, why they were not buried by deep-sea sedimentation. A nodule recovered from the Penrhyn Basin in the South Pacific was measured to reveal its fossil magnetization by the ancient …Web

Reduced sedimentation rates should apply to heterotrophic sediment producers (e.g., crinoids) and microbial build-ups, both of which are common in drowning successions (Ettinger et al., 2020; Föllmi et al., 1994; Huck et al., 2010). One limitation of the our model is that, we grouped carbonate produced in the surface oceans as a singular …Web

The location of the SMT relative to the sediment surface in turn strongly depends on the sedimentation rates and the ... Beal, E. J., House, C. H. & Orphan, V. J. Manganese- and iron-dependent ...Web

Sedimentary manganese deposits described here are shallow-marine (non …Web

Manganese (Mn) control in surface water systems is a challenge for the drinking water industry, especially through a sustainability framework. Current methods for removing manganese from surface ...Web

The Precambrian rock record provides about 75% of global mineral resources, with iron and manganese being almost wholly derived from such ancient sedimentary host rocks (Altermann and Corcoran, 2002b). ... The sedimentation cycle would have begun within this early Earth environment, and weathering products and a …Web

The sedimentation temperature and time were designed according to the solidification curves of the secondary aluminum alloys. In this study, combinations of 0–2 wt% of manganese (Mn) and chromium (Cr) were added to the melts for isothermal sedimentation. Fe-rich sludges of Al(FeMn)Si, Al(FeCr)Si, and Al(FeMnCr)Si …Web

The manganese nodules of this area are formed through two different depositional …Web

In seeking to understand the processes that alter manganese minerals …Web

A simple model of the precipitation of ferromanganese minerals forming …Web

During six Eulerian studies in the Columbia River Estuary, each up to 26 h, we measured manganese speciation and concentration across a salinity ( SP) gradient centred around SP = 0.06–6, equivalent to a seawater ionic strength (I Sp) of 1.2–120 mM. This zone, representing the region between freshwater and the more intensively studied ...Web

Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, B.C., Canada V6T 1Z4 Abstract The sedimentary geochemistry of manganese is dominated by the redox control of its ...Web

Sedimentation and manganese concretions in a British Columbia fiord (Jervis Inlet) by Roderick Dickson Macdonald, 1973, Dept. of Energy, Mines and Resources edition, in EnglishWeb

The Barents Sea is the largest pan-Arctic shelf sea covering an area of 1.6 million km 2 with an average water depth of 230 m 67.There are several extensive overviews and reviews about the modern ...Web

2.1. Microorganism. A 50 × 50 cm 2 square-corer core was obtained from the South China Sea (5°36.51′ N, 113°38.97′; depth: 2125 m). The sampled sediment surface temperature was 9 °C, the pH was 7.4, and the Eh was 201. All the cores were opened from the side onboard, and sub-samples were collected from the center of the core under …Web

The iron–manganese oxide-bound Hg releases at a temperature range of 200–600 °C, while the carbonate-bound Hg releases at a temperature range of 250–300 °C. The organic-bound Hg, sulfide-bound Hg, and silicate-bound Hg release at temperature ranges of 200–400, 400–600, and above 1200 °C, respectively.Web

The sedimentary geochemistry of manganese is dominated by the redox control of its speciation, higher oxidation states (Mn (super 3+) and (super 4+) ) occurring as insoluble oxyhydroxides in well-oxygenated environments and the lower oxidation state (Mn (super 2+) ) being much more soluble in oxygen-deficient settings.Web

Manganese nodules are authigenic deposits composed principally of manganese oxides enriched in Fe and Co, Ni, and Cu. They occur in all the world's oceans but are generally found in areas where sediment accumulation rate is slow. Indeed, Mn nodules grow slowly—millimeters to 10s of millimeters per million years.Web

The sedimentary geochemistry of manganese is dominated by the redox control of its …Web

Significant sedimentation of manganese (Mn) in form of manganese …Web

R. D. Macdonald & J. W. Murray 1973. Sedimentation and manganese concretions in a British Columbia Fiord (Jervis Inlet). Geological Survey of Canada Paper 73–23. vi + 67 pp., 22 figs, 2 appendices. Ottawa. Price $3.00. - Volume 111 Issue 5Web

Significant sedimentation of manganese (Mn) in form of manganese oxides (MnOx) and the subsequent formation of authigenic calcium-rich rhodochrosite (Mn(Ca)CO3) were observed in the seasonally stratified hard water Lake Stechlin in north-eastern Germany. This manganese enrichment was assumed to be associated with …Web

Ingeneral, nodules from the quatorial N. Pacific sediment surface and the role ofbiological productivity ofthe are on average larger, more discoidal, have higher Mn/Fe ratios surface waters in influencing nodule characteristics. Using this and higher Ni,Cu and Zn contents, contain 10 A manganite as model, the principal physical, chemical ...Web

Redox-sensitive elements in sediments, such as manganese (Mn), vanadium (V), molybdenum (Mo), and uranium (U), are promising indicators of past redox conditions during sedimentation and early diagenesis. However, in the Ontong Java Plateau, west equatorial Pacific, there are sparse datasets of redox-sensitive elements in sediment …Web

The most extensive manganese minerals deposits occur on abyssal plains, including those under open-ocean gyres 2, where both organic matter photosynthetic primary production and sedimentation ...Web

Manganese nodule sampling station of the Clarion-Clipperton Fracture Zone (CCFZ). Grain-size distribution of manganese nodule tailing samples. Treatments for the manganese nodule settling velocity ...Web

Lacustrine sedimentation. Part of the Encyclopedia of Earth Sciences Series book series (EESS) The lake is a system, that is, a bounded entity possessing a set of unique, interconnected elements, especially of process and response, that can be recognized as such regardless of how they are dealt with by scientific enquiry (Strahler, …Web

primarily manganese and iron oxides and hydroxides concentrated around a core. The NORI Project comprising an area oof 74,830 km2, is located between approximately 115 and 135o oWest and approximately 10 and 15o North and comprises four areas NORI Area A – D (Fig., 1). The title is held pursuant to an exploration contract between NORI and theWeb

Formation of manganese oxide (MnO 2 ) under extended O 2 -deficient but non-euxinic periods is an essential precondition for the exceptionally high levels of Mn carbonate formation that occurs in ...Web

The Sullivan in Southeast British Columbia is 150 million tonnes making it a larger than average SEDEX deposit, but the grades are pretty much average with about 11% combined of lead and zinc. ... there needs to be a break in sedimentation to allow the sulphides to accumulate, undiluted, by deposited sediment. ...Web