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Academic literature on the topic 'Ferruginous sediments'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Ferruginous sediments"

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Vuillemin, Aurèle, André Friese, Richard Wirth, Jan A. Schuessler, Anja M. Schleicher, Helga Kemnitz, Andreas Lücke, et al. "Vivianite formation in ferruginous sediments from Lake Towuti, Indonesia." Biogeosciences 17, no. 7 (April 14, 2020): 1955–73. http://dx.doi.org/10.5194/bg-17-1955-2020.

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Abstract. Ferruginous lacustrine systems, such as Lake Towuti, Indonesia, are characterized by a specific type of phosphorus cycling in which hydrous ferric iron (oxyhydr)oxides trap and precipitate phosphorus to the sediment, which reduces its bioavailability in the water column and thereby restricts primary production. The oceans were also ferruginous during the Archean, thus understanding the dynamics of phosphorus in modern-day ferruginous analogues may shed light on the marine biogeochemical cycling that dominated much of Earth's history. Here we report the presence of large crystals (>5 mm) and nodules (>5 cm) of vivianite – a ferrous iron phosphate – in sediment cores from Lake Towuti and address the processes of vivianite formation, phosphorus retention by iron and the related mineral transformations during early diagenesis in ferruginous sediments. Core scan imaging, together with analyses of bulk sediment and pore water geochemistry, document a 30 m long interval consisting of sideritic and non-sideritic clayey beds and diatomaceous oozes containing vivianites. High-resolution imaging of vivianite revealed continuous growth of crystals from tabular to rosette habits that eventually form large (up to 7 cm) vivianite nodules in the sediment. Mineral inclusions like millerite and siderite reflect diagenetic mineral formation antecedent to the one of vivianite that is related to microbial reduction of iron and sulfate. Together with the pore water profiles, these data suggest that the precipitation of millerite, siderite and vivianite in soft ferruginous sediments stems from the progressive consumption of dissolved terminal electron acceptors and the typical evolution of pore water geochemistry during diagenesis. Based on solute concentrations and modeled mineral saturation indices, we inferred vivianite formation to initiate around 20 m depth in the sediment. Negative δ56Fe values of vivianite indicated incorporation of kinetically fractionated light Fe2+ into the crystals, likely derived from active reduction and dissolution of ferric oxides and transient ferrous phases during early diagenesis. The size and growth history of the nodules indicate that, after formation, continued growth of vivianite crystals constitutes a sink for P during burial, resulting in long-term P sequestration in ferruginous sediment.
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Bauer, Kohen W., Bleuenn Gueguen, Devon B. Cole, Roger Francois, Jens Kallmeyer, Noah Planavsky, and Sean A. Crowe. "Chromium isotope fractionation in ferruginous sediments." Geochimica et Cosmochimica Acta 223 (February 2018): 198–215. http://dx.doi.org/10.1016/j.gca.2017.10.034.

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Strakhovenko, V. D., N. A. Belkina, N. A. Efremenko, M. S. Potakhin, D. A. Subetto, L. A. Frolova, G. R. Nigamatzyanova, A. V. Ludikova, and E. A. Ovdina. "The First Data on the Mineralogy and Geochemistry of the Suspension of Lake Onego." Russian Geology and Geophysics 63, no. 1 (January 1, 2022): 55–71. http://dx.doi.org/10.2113/rgg20204280.

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Abstract —This paper presents the first data on the mineralogy, geochemistry, and quantitative distribution of suspension determined with the use of sedimentation traps installed in Lake Onego (the exposure time was one year (2019)). The obtained data on the mineralogic and geochemical composition of the recent suspension of the Onego water column are compared with the data for the surface layer of the lake bottom sediments (0–10 cm). Data on the sedimentation rates for the substance determined with the sedimentation traps have been obtained for the first time for Lake Onego. The estimates of the sedimentation rates differ slightly from the results of calculation of the sedimentation rates by radioisotope dating based on the distribution of 210Pb activity in the upper layer of bottom sediments in combination with the data on 137Cs. It has been established that the mineral part of the dispersed sedimentary matter that entered the lake reaches the bottom sediment without significant changes. The geochemistry of the sedimentation traps is similar in many respects to the geochemistry of the upper part of the bottom sediments (0–10 cm) in different areas of Lake Onego. The dispersed sedimentary material and the bottom sediment differ in the amount of the biogenic part (in the bottom sediment layer (0–10 cm), the biogenic part loses a significant part of organic matter). The bottom sediments are characterized by a strong predominance of the ferruginous varieties of illite and chlorite, in contrast to the suspension with the prevailing Mg–Fe varieties of these minerals. Degraded mica minerals brought by rivers are regenerated to normal ferruginous illites and chlorites directly in the uppermost part of the bottom sediments. The bottom sediments are characterized by higher manganese and molybdenum contents, and the material from the sedimentation traps, by high mercury contents.
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Anand, Ravi R., Martin A. Wells, Melvyn J. Lintern, Louise Schoneveld, Martin Danišík, Walid Salama, Ryan R. P. Noble, Vasek Metelka, and Nathan Reid. "The (U-Th)/He Chronology and Geochemistry of Ferruginous Nodules and Pisoliths Formed in the Paleochannel Environments at the Garden Well Gold Deposit, Yilgarn Craton of Western Australia: Implications for Landscape Evolution and Geochemical Exploration." Minerals 11, no. 7 (June 25, 2021): 679. http://dx.doi.org/10.3390/min11070679.

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Ferruginous nodules and pisoliths that cap deeply weathered profiles and transported cover are characteristic of the Yilgarn Craton, Western Australia. Here we show how ferruginous nodules and pisoliths formed in the paleochannel sediments during Miocene can be used to locate buried Au mineralization. Three types of ferruginous nodules and pisoliths were identified in paleochannel sediments and saprolite, representing different parent materials and environments covering the Garden Well Au deposit: (i) ferruginous nodules formed in saprolite on the flanks of the paleochannel (NSP), (ii) ferruginous pisoliths formed in the Perkolilli Shale in the middle of the paleochannel (PPS) and (iii) ferruginous nodules formed in the Wollubar Sandstone at the bottom of the paleochannel (NWS). The appearance, mineralogy and geochemistry of ferruginous nodules and pisoliths vary according to their origin. The PPS and NWS are goethite-rich whereas NSP is a mixture of goethite and hematite which make them all suitable for (U–Th)/He dating. The average age of goethite in the NSP is 14.8 Ma, in the NWS is 11.2 Ma and in the PPS is 18.6 and 14 Ma. The goethite ages in ferruginous nodules and pisoliths are thought to be younger than the underlying saprolite (Paleocene-Eocene) and were formed in different environmental conditions than the underlying saprolite. Anomalous concentrations of Au, As, Cu, Sb, In, Se, Bi, and S in the cores and cortices of the NWS and the PPS reflect the underlying Au mineralization, and thus these nodules and pisoliths are useful sample media for geochemical exploration in this area. These elements originating in mineralized saprolite have migrated both upwards and laterally into the NWS and the PPS, to form spatially large targets for mineral exploration.
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Vuillemin, Aurèle, Fabian Horn, André Friese, Matthias Winkel, Mashal Alawi, Dirk Wagner, Cynthia Henny, William D. Orsi, Sean A. Crowe, and Jens Kallmeyer. "Metabolic potential of microbial communities from ferruginous sediments." Environmental Microbiology 20, no. 12 (October 16, 2018): 4297–313. http://dx.doi.org/10.1111/1462-2920.14343.

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6

Vuillemin, Aurèle, Richard Wirth, Helga Kemnitz, Anja M. Schleicher, André Friese, Kohen W. Bauer, Rachel Simister, et al. "Formation of diagenetic siderite in modern ferruginous sediments." Geology 47, no. 6 (April 16, 2019): 540–44. http://dx.doi.org/10.1130/g46100.1.

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7

Johnson, Brooke R., Rosalie Tostevin, Philip Gopon, Jon Wells, Stuart A. Robinson, and Nicholas J. Tosca. "Phosphorus burial in ferruginous SiO2-rich Mesoproterozoic sediments." Geology 48, no. 1 (November 13, 2019): 92–96. http://dx.doi.org/10.1130/g46824.1.

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Abstract Persistently low atmospheric oxygen requires that net organic carbon burial was muted through much of Earth’s middle age. In order to achieve global mass balance with respect to O2, recent models have suggested that redox-dependent mechanisms, such as Fe(II)-phosphate precipitation, limited phosphate availability in dominantly anoxic and ferruginous oceans, in turn limiting net primary production, and therefore organic carbon burial. Nevertheless, observational constraints on phosphorus cycling in ferruginous Proterozoic systems are rare, leaving these models largely untested. Here, we present high-resolution petrographic and mineralogical data showing that the 1.3 Ga Sherwin Ironstone (Roper Group, Australia) was dominated by syndepositional precipitation of the Fe(II)-silicate minerals greenalite and berthierine, interlaminated with abundant authigenic calcium fluorapatite (CFA). Set in a quantitative geochemical framework, these data reveal that elevated marine SiO2(aq) concentrations facilitated extensive Fe(II)-silicate production, leaving CFA, rather than Fe(II)-phosphate, as the principal inorganic phosphorous sink in shallow-water Roper Group sediments. More broadly, the physical and chemical factors that triggered Fe(II)-silicate and CFA burial in the Roper Seaway highlight semi-restricted basins as important loci of phosphorus removal from the mid-Proterozoic ocean.
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Juchen, Carlos Roberto, Cristiano Poleto, Marcio Antonio Vilas Boas, and Rodrigo Trevisani Juchen. "MINERALOGICAL AND CHEMICAL CHARACTERIZATION OF SEDIMENTS FROM IMPERVIOUS URBAN STREETS." Journal of Urban and Environmental Engineering 10, no. 2 (April 28, 2017): 194–200. http://dx.doi.org/10.4090/juee.2016.v10n2.194-200.

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This study aimed to determine the granulometric and mineralogical composition and the contents of trace elements Cr, Ni and Pb in sediments collected in impermeable streets located in the urban perimeter of Toledo PR, Brazil. The mineralogical analyses were performed by a diffractometer, the granulometric by integrated sieving methods and laser diffraction, trace elements in sediment quartered fractions by optical emission spectrometry with inductively coupled plasma (ICP-OES). It was concluded that the sediments with an average granulometric greater than 0.09 mm and finer fractions represented by the clay. The mineralogy identified ferruginous substances characteristics of Distroferric Red Latosol - DRL with high presence of quartz and diopside. Statistically it was shown that the concentrations of the trace elements in sediment samples had a significant enrichment for Chromium and Nickel in the central area’s streets and the Lead in lower concentrations in the streets of the periphery areas. The sediments have an average particle size with diameters greater than 0.09 mm, represented by sand, and the fine sediments represent 2 to 6% of samples. The software indicated that the sediments are from different anthropogenic sources. The diffractograms show peaks for quartz and diopside. The enrichment for trace elements was significant for chromium and nickel on the downtown area streets.
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Juchen, Carlos Roberto, Cristiano Poleto, Marcio Antonio Vilas Boas, and Rodrigo Trevisani Juchen. "MINERALOGICAL AND CHEMICAL CHARACTERIZATION OF SEDIMENTS FROM IMPERVIOUS URBAN STREETS." Journal of Urban and Environmental Engineering 10, no. 2 (April 28, 2017): 194–200. http://dx.doi.org/10.4090/juee.2016.v10n2.194200.

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This study aimed to determine the granulometric and mineralogical composition and the contents of trace elements Cr, Ni and Pb in sediments collected in impermeable streets located in the urban perimeter of Toledo PR, Brazil. The mineralogical analyses were performed by a diffractometer, the granulometric by integrated sieving methods and laser diffraction, trace elements in sediment quartered fractions by optical emission spectrometry with inductively coupled plasma (ICP-OES). It was concluded that the sediments with an average granulometric greater than 0.09 mm and finer fractions represented by the clay. The mineralogy identified ferruginous substances characteristics of Distroferric Red Latosol - DRL with high presence of quartz and diopside. Statistically it was shown that the concentrations of the trace elements in sediment samples had a significant enrichment for Chromium and Nickel in the central area’s streets and the Lead in lower concentrations in the streets of the periphery areas. The sediments have an average particle size with diameters greater than 0.09 mm, represented by sand, and the fine sediments represent 2 to 6% of samples. The software indicated that the sediments are from different anthropogenic sources. The diffractograms show peaks for quartz and diopside. The enrichment for trace elements was significant for chromium and nickel on the downtown area streets.
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10

Petrash, Daniel A., Ingrid M. Steenbergen, Astolfo Valero, Travis B. Meador, Tomáš Pačes, and Christophe Thomazo. "Aqueous system-level processes and prokaryote assemblages in the ferruginous and sulfate-rich bottom waters of a post-mining lake." Biogeosciences 19, no. 6 (March 24, 2022): 1723–51. http://dx.doi.org/10.5194/bg-19-1723-2022.

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Abstract. In the low-nutrient, redox-stratified Lake Medard (Czechia), reductive Fe(III) dissolution outpaces sulfide generation from microbial sulfate reduction (MSR) and ferruginous conditions occur without quantitative sulfate depletion. The lake currently has marked overlapping C, N, S, Mn and Fe cycles occurring in the anoxic portion of the water column. This feature is unusual in stable, natural, redox-stratified lacustrine systems where at least one of these biogeochemical cycles is functionally diminished or undergoes minimal transformations because of the dominance of another component or other components. Therefore, this post-mining lake has scientific value for (i) testing emerging hypotheses on how such interlinked biogeochemical cycles operate during transitional redox states and (ii) acquiring insight into redox proxy signals of ferruginous sediments underlying a sulfatic and ferruginous water column. An isotopically constrained estimate of the rates of sulfate reduction (SRRs) suggests that despite high genetic potential, this respiration pathway may be limited by the rather low amounts of metabolizable organic carbon. This points to substrate competition exerted by iron- and nitrogen-respiring prokaryotes. Yet, the planktonic microbial succession across the nitrogenous and ferruginous zones also indicates genetic potential for chemolithotrophic sulfur oxidation. Therefore, our SRR estimates could rather be portraying high rates of anoxic sulfide oxidation to sulfate, probably accompanied by microbially induced disproportionation of S intermediates. Near and at the anoxic sediment–water interface, vigorous sulfur cycling can be fuelled by ferric and manganic particulate matter and redeposited siderite stocks. Sulfur oxidation and disproportionation then appear to prevent substantial stabilization of iron monosulfides as pyrite but enable the interstitial precipitation of microcrystalline equant gypsum. This latter mineral isotopically recorded sulfur oxidation proceeding at near equilibrium with the ambient anoxic waters, whilst authigenic pyrite sulfur displays a 38 ‰ to 27 ‰ isotopic offset from ambient sulfate, suggestive of incomplete MSR and open sulfur cycling. Pyrite-sulfur fractionation decreases with increased reducible reactive iron in the sediment. In the absence of ferruginous coastal zones today affected by post-depositional sulfate fluxes, the current water column redox stratification in the post-mining Lake Medard is thought relevant for refining interpretations pertaining to the onset of widespread redox-stratified states across ancient nearshore depositional systems.
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Dissertations / Theses on the topic "Ferruginous sediments"

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Friese, André [Verfasser], and Jens [Akademischer Betreuer] Kallmeyer. "Biogeochemistry of ferruginous sediments of Lake Towuti, Sulawesi, Indonesia / André Friese ; Betreuer: Jens Kallmeyer." Potsdam : Universität Potsdam, 2020. http://d-nb.info/1219663484/34.

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Lockheed, A. E. "Finding blind orebodies: geochemical exploration for large nickel-copper and PGE sulphides on the Western Gawler Craton." Thesis, 2003. http://hdl.handle.net/2440/123524.

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The search for economically viable ore deposits focuses increasingly on deeply buried deposits. This study was designed to highlight specific mafic/ultramafic igneous bodies in the western Gawler Craton, near Streaky Bay, South Australia, through the analysis of the behaviour of pathfinder elements within the regolith above anomalous aeromagnetic targets. In particular, the possibility of developing a rapid and inexpensive means of characterising the intrusions at depth by looking within the calcareous sediments located within the top two to twelve metres of regolith was evaluated. Data from 26 of the 53 holes drilled were analysed, covering an area of approximately 214 km2. This area covers a diverse lithological basement including ultramafics, gabbros, granitoids and felsic gneisses and is located near a strong magnetic anomaly. Given the significant difference in basement lithology of the target bodies (mafic to ultramafic) versus the variably magnetic felsic to intermediate granitoids, pathfinder elements including Ni, Cu, Cr, Mn and V, which are elevated in mafic to ultramafic rocks, were targeted. Depth plots and ratios of the transition elements are shown with simple graphing techniques are used to illustrate the behaviour of geochemical signatures throughout the profile and to display any correlation between basement rocks and the regolith. There was no discernible anomaly in any trace metals throughout the calcrete of the uppermost regolith unit. Calcrete pathfinder element abundances are uniformly low, which is to be expected, as the sediments are up to 75% carbonate, and any basement detrital signature is highly diluted. In the majority of holes, however, an abrupt increase in these element values occurred at the base of the calcrete or a few metres deeper within ferruginous sediments. The increase in values occurred in Ni, Cu and Cr, but was most prominent in V. This pattern is reflected in the plots for the basement saprolitic material. Unfortunately, sampling of the oxidised zones requires expensive and time­consuming air-core drilling through up to twelve metres of calcrete, and in places soft, unconsolidated sands. More detailed geochemical analyses of the calcrete layers in the 26 holes were undertaken to try to establish a method of identifying the basement lithology from the calcrete chemical data. Absolute abundances of pathfinder elements are too low in the calcrete to be useful in distinguishing differences in basement lithology. While calcareous sediments may contain subtle geochemical indicators of the differences in basement lithology, it alone is not adequate to confidently predict the basement lithology for drilling. Below the calcrete, within the oxidised zone, the geochemical anomalies are large enough to confidently conclude whether the basement is mafic or felsic.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2003
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Conference papers on the topic "Ferruginous sediments"

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Grengs, Ashley, Chad Wittkop, Nicholas Lambrecht, Moji Fahkraee, Sergei Katsev, and Elizabeth Swanner. "CONSTRAINING IRON FORMATION PRIMARY MINERALOGY USING FERRUGINOUS LAKE SEDIMENTS." In 54th Annual GSA North-Central Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020nc-347988.

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