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  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Geomicrobiology. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (443 pages)
    Edition: 1st ed.
    ISBN: 9781444309027
    DDC: 579
    Language: English
    Note: Intro -- Preface -- 1 Microbial properties and diversity -- 1.1 Classification of life -- 1.2 Physical properties of microorganisms -- 1.2.1 Prokaryotes -- 1.2.2 Eukaryotes -- 1.3 Requirements for growth -- 1.3.1 Physical requirements -- 1.3.2 Chemical requirements -- 1.3.3 Growth rates -- 1.4 Microbial diversity -- 1.5 Life in extreme environments -- 1.5.1 Hydrothermal systems -- 1.5.2 Polar environments viable population is available to seed the global -- 1.5.3 Acid environments -- 1.5.4 Hypersaline and alkaline environments -- 1.5.5 Deep-subsurface environments -- 1.5.6 Life on other planets -- 1.5.7 Panspermia -- 1.6 Summary -- 2 Microbial metabolism -- 2.1 Bioenergetics -- 2.1.1 Enzymes -- 2.1.2 Oxidation-reduction -- 2.1.3 ATP generation -- 2.1.4 Chemiosmosis -- 2.2 Photosynthesis -- 2.2.1 Pigments -- 2.2.2 The light reactions - anoxygenic photosynthesis -- 2.2.3 Classification of anoxygenic photosynthetic bacteria -- 2.2.4 The light reactions - oxygenic photosynthesis -- 2.2.5 The dark reactions -- 2.2.6 Nitrogen fixation -- 2.3 Catabolic processes -- 2.3.1 Glycolysis and fermentation -- 2.3.2 Respiration -- 2.4 Chemoheterotrophic pathways -- 2.4.1 Aerobic respiration -- 2.4.2 Dissimilatory nitrate reduction -- 2.4.3 Dissimilatory manganese reduction -- 2.4.4 Dissimilatory iron reduction -- 2.4.5 Trace metal and metalloid reductions -- 2.4.6 Dissimilatory sulfate reduction -- 2.4.7 Methanogenesis and homoacetogenesis -- 2.5 Chemolithoautotrophic pathways -- 2.5.1 Hydrogen oxidizers -- 2.5.2 Homoacetogens and methanogens -- 2.5.3 Methylotrophs -- 2.5.4 Sulfur oxidizers -- 2.5.5 Iron oxidizers -- 2.5.6 Manganese oxidizers -- 2.5.7 Nitrogen oxidizers -- 3 Cell surface reactivity and metal sorption -- 3.1 The cell envelope -- 3.1.1 Bacterial cell walls -- 3.1.2 Bacterial surface layers -- 3.1.3 Archaeal cell walls. , 3.1.4 Eukaryotic cell walls -- 3.2 Microbial surface charge -- 3.2.1 Acid-base chemistry of microbial surfaces -- 3.2.2 Electrophoretic mobility -- 3.2.3 Chemical equilibrium models -- 3.3 Passive metal adsorption -- 3.3.1 Metal adsorption to bacteria -- 3.3.2 Metal adsorption to eukaryotes -- 3.3.3 Metal cation partitioning -- 3.3.4 Competition with anions -- 3.4 Active metal adsorption -- 3.4.1 Surface stability requirements -- 3.4.2 Metal binding to microbial exudates -- 3.5 Bacterial metal sorption models -- 3.5.1 Kd coefficients -- 3.5.2 Freundlich isotherms -- 3.5.3 Langmuir isotherms -- 3.5.4 Surface complexation -- 3.5.5 Does a generalized sorption model exist? -- 3.6 The microbial role in contaminant mobility -- 3.6.1 Microbial sorption to solid surfaces -- 3.6.2 Microbial transport through porous media -- 3.7 Industrial applications based on microbial surface reactivity -- 3.7.1 Bioremediation -- 3.7.2 Biorecovery -- 3.8 Summary -- 4 Biomineralization -- 4.1 Biologically induced mineralization -- 4.1.1 Mineral nucleation and growth -- 4.1.2 Iron hydroxides -- 4.1.3 Magnetite -- 4.1.4 Manganese oxides -- 4.1.5 Clays -- 4.1.6 Amorphous silica -- 4.1.7 Carbonates -- 4.1.8 Phosphates -- 4.1.9 Sulfates -- 4.1.10 Sulfide minerals -- 4.2 Biologically controlled mineralization -- 4.2.1 Magnetite -- 4.2.2 Greigite -- 4.2.3 Amorphous silica -- 4.2.4 Calcite -- 4.3 Fossilization -- 4.3.1 Silicification -- 4.3.2 Other authigenic minerals -- 4.4 Summary -- 5 Microbial weathering -- 5.1 Mineral dissolution -- 5.1.1 Reactivity at mineral surfaces -- 5.1.2 Microbial colonization and organic reactions -- 5.1.3 Silicate weathering -- 5.1.4 Carbonate weathering -- 5.1.5 Soil formation -- 5.1.6 W eathering and global climate -- 5.2 Sulfide oxidation -- 5.2.1 Pyrite oxidation mechanisms -- 5.2.2 Biological role in pyrite oxidation -- 5.2.3 Bioleaching. , 5.2.4 Biooxidation of refractory gold -- 5.3 Microbial corrosion -- 5.3.1 Chemolithoautotrophs -- 5.3.2 Chemoheterotrophs -- 5.3.3 Fungi -- 5.4 Summary -- 6 Microbial zonation -- 6.1 Microbial mats -- 6.1.1 Mat development -- 6.1.2 Photosynthetic mats -- 6.1.3 Chemolithoautotrophic mats -- 6.1.4 Biosedimentary structures -- 6.2 Marine sediments -- 6.2.1 Organic sedimentation -- 6.2.2 An overview of sediment diagenesis -- 6.2.3 Oxic sediments -- 6.2.4 Suboxic sediments -- 6.2.5 Anoxic sediments -- 6.2.6 Preservation of organic carbon Preservation of organic carbon -- 6.2.7 Diagenetic mineralization -- 6.2.8 Sediment hydrogen concentrations -- 6.2.9 Problems with the biogeochemical zone scheme -- 6.3 Summary -- 7 Early microbial life -- 7.1 The prebiotic Earth -- 7.1.1 The Hadean environment -- 7.1.2 Origins of life -- 7.1.3 Mineral templates -- 7.2 The first cellular life forms -- 7.2.1 The chemolithoautotrophs -- 7.2.2 Deepest-branching Bacteria and Archaea -- 7.2.3 The fermenters and initial respirers -- 7.3 Evolution of photosynthesis -- 7.3.1 Early phototrophs -- 7.3.2 Photosynthetic expansion -- 7.3.3 The cyanobacteria -- 7.4 Metabolic diversification -- 7.4.1 Obligately anaerobic respirers -- 7.4.2 Continental platforms as habitats -- 7.4.3 Aerobic respiratory pathways -- 7.5 Earth's oxygenation -- 7.5.1 The changing Proterozoic environment -- 7.5.2 Eukaryote evolution -- 7.6 Summary -- References -- Index.
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  • 2
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Geobiology. ; Biosphere. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (481 pages)
    Edition: 1st ed.
    ISBN: 9781118280867
    DDC: 508
    Language: English
    Note: Intro -- FUNDAMENTALS OF GEOBIOLOGY -- Contents -- Contributors -- 1. What is Geobiology? -- 1.1 Introduction -- 1.2 Life interacting with the Earth -- 1.3 Pattern and process in geobiology -- 1.4 New horizons in geobiology -- References -- 2. The Global Carbon Cycle: Biological Processes -- 2.1 Introduction -- 2.2 A brief primer on redox reactions -- 2.3 Carbon as a substrate for biological reactions -- 2.4 The evolution of photosynthesis -- 2.5 The evolution of oxygenic phototrophs -- 2.6 Net primary production -- 2.7 What limits NPP on land and in the ocean? -- 2.8 Is NPP in balance with respiration? -- 2.9 Conclusions and extensions -- References -- 3. The Global Carbon Cycle: Geological Processes -- 3.1 Introduction -- 3.2 Organic carbon cycling -- 3.3 Carbonate cycling -- 3.4 Mantle degassing -- 3.5 Metamorphism -- 3.6 Silicate weathering -- 3.7 Feedbacks -- 3.8 Balancing the geological carbon cycle -- 3.9 Evolution of the geological carbon cycle through Earth's history: proxies and models -- 3.10 The geological C cycle through time -- 3.11 Limitations and perspectives -- References -- 4. The Global Nitrogen Cycle -- 4.1 Introduction -- 4.2 Geological nitrogen cycle -- 4.3 Components of the global nitrogen cycle -- 4.4 Nitrogen redox chemistry -- 4.5 Biological reactions of the nitrogen cycle -- 4.6 Atmospheric nitrogen chemistry -- 4.7 Summary and areas for future research -- References -- 5. The Global Sulfur Cycle -- 5.1 Introduction -- 5.2 The global sulfur cycle from two perspectives -- 5.3 The evolution of S metabolisms -- 5.4 The interaction of S with other biogeochemical cycles -- 5.5 The evolution of the S cycle -- 5.6 Closing remarks -- Acknowledgements -- References -- 6. The Global Iron Cycle -- 6.1 Overview -- 6.2 The inorganic geochemistry of iron: redox and reservoirs -- 6.3 Iron in modern biology and biogeochemical cycles. , 6.4 Iron through time -- 6.5 Summary -- Acknowledgements -- References -- 7. The Global Oxygen Cycle -- 7.1 Introduction -- 7.2 The chemistry and biochemistry of oxygen -- 7.3 The concept of redox balance -- 7.4 The modern O2 cycle -- 7.5 Cycling of O2 and H2 on the early Earth -- 7.6 Synthesis: speculations about the timing and cause of the rise of atmospheric O2 -- References -- 8. Bacterial Biomineralization -- 8.1 Introduction -- 8.2 Mineral nucleation and growth -- 8.3 How bacteria facilitate biomineralization -- 8.4 Iron oxyhydroxides -- 8.5 Calcium carbonates -- Acknowledgements -- References -- 9. Mineral-Organic-Microbe Interfacial Chemistry -- 9.1 Introduction -- 9.2 The mineral surface (and mineral-bio interface) and techniques for its study -- 9.3 Mineral-organic-microbe interfacial processes: some key examples -- Acknowledgements -- References -- 10. Eukaryotic Skeletal Formation -- 10.1 Introduction -- 10.2 Mineralization by unicellular organisms -- 10.3 Mineralization by multicellular organisms -- 10.4 A brief history of skeletons -- 10.5 Summary -- Acknowledgements -- References -- 11. Plants and Animals as Geobiological Agents -- 11.1 Introduction -- 11.2 Land plants as geobiological agents -- 11.3 Animals as geobiological agents -- 11.4 Conclusions -- Acknowledgements -- References -- 12. A Geobiological View of Weathering and Erosion -- 12.1 Introduction -- 12.2 Effects of biota on weathering -- 12.3 Effects of organic molecules on weathering -- 12.4 Organomarkers in weathering solutions -- 12.5 Elemental profiles in regolith -- 12.6 Time evolution of profile development -- 12.7 Investigating chemical, physical, and biological weathering with simple models -- 12.8 Conclusions -- Acknowledgements -- References -- 13. Molecular Biology's Contributions to Geobiology -- 13.1 Introduction -- 13.2 Molecular approaches used in geobiology. , 13.3 Case study: anaerobic oxidation of methane -- 13.4 Challenges and opportunities for the next generation -- Acknowledgements -- References -- 14. Stable Isotope Geobiology -- 14.1 Introduction -- 14.2 Isotopic notation and the biogeochemical elements -- 14.3 Tracking fractionation in a system -- 14.4 Applications -- 14.5 Using isotopes to ask a geobiological question in deep time -- 14.6 Conclusions -- Acknowledgements -- References -- 15. Biomarkers: Informative Molecules for Studies in Geobiology -- 15.1 Introduction -- 15.2 Origins of biomarkers -- 15.3 Diagenesis -- 15.4 Isotopic compositions -- 15.5 Stereochemical considerations -- 15.6 Lipid biosynthetic pathways -- 15.7 Classification of lipids -- 15.8 Lipids diagnostic of Archaea -- 15.9 Lipids diagnostic of Bacteria -- 15.10 Lipids of Eukarya -- 15.11 Preservable cores -- 15.12 Outlook -- Acknowledgements -- References -- 16. The Fossil Record of Microbial Life -- 16.1 Introduction -- 16.2 The nature of Earth's early microbial record -- 16.3 Paleobiological inferences from microfossil morphology -- 16.4 Inferences from microfossil chemistry and ultrastructure (new technologies) -- 16.5 Inferences from microbialites -- 16.6 A brief history, with questions -- 16.7 Conclusions -- Acknowledgements -- References -- 17. Geochemical Origins of Life -- 17.1 Introduction -- 17.2 Emergence as a unifying concept in origins research -- 17.3 The emergence of biomolecules -- 17.4 The emergence of macromolecules -- 17.5 The emergence of self-replicating systems -- 17.6 The emergence of natural selection -- 17.7 Three scenarios for the origins of life -- Acknowledgements -- References -- 18. Mineralogical Co-evolution of the Geosphere and Biosphere -- 18.1 Introduction -- 18.2 Prebiotic mineral evolution I - evidence from meteorites -- 18.3 Prebiotic mineral evolution II - crust and mantle reworking. , 18.4 The anoxic Archean biosphere -- 18.5 The Great Oxidation Event -- 18.6 A billion years of stasis -- 18.7 The snowball Earth -- 18.8 The rise of skeletal mineralization -- 18.9 Summary -- Acknowledgements -- References -- 19. Geobiology of the Archean Eon -- 19.1 Introduction -- 19.2 Carbon cycle -- 19.3 Sulfur cycle -- 19.4 Iron cycle -- 19.5 Oxygen cycle -- 19.6 Nitrogen cycle -- 19.7 Phosphorus cycle -- 19.8 Bioaccretion of sediment -- 19.9 Bioalteration -- 19.10 Conclusions -- References -- 20. Geobiology of the Proterozoic Eon -- 20.1 Introduction -- 20.2 The Great Oxidation Event -- 20.3 The early Proterozoic: Era geobiology in the wake of the GOE -- 20.4 The mid-Proterozoic: a last gasp of iron formations, deep ocean anoxia, the 'boring' billion, and a mid-life crisis -- 20.5 The history of Proterozoic life: biomarker records -- 20.6 The history of Proterozoic life: mid-Proterozoic fossil record -- 20.7 The late Proterozoic: a supercontinent, oxygen, ice, and the emergence of animals -- 20.8 Summary -- Acknowledgements -- References -- 21. Geobiology of the Phanerozoic -- 21.1 The beginning of the Phanerozoic Eon -- 21.2 Cambrian mass extinctions -- 21.3 The terminal Ordovician mass extinction -- 21.4 The impact of early land plants -- 21.5 Silurian biotic crises -- 21.6 Devonian mass extinctions -- 21.7 Major changes of the global ecosystem in Carboniferous time -- 21.8 Low-elevation glaciation near the equator -- 21.9 Drying of climates -- 21.10 A double mass extinction in the Permian -- 21.11 The absence of recovery in the early Triassic -- 21.12 The terminal Triassic crisis -- 21.13 The rise of atmospheric oxygen since early in Triassic time -- 21.14 The Toarcian anoxic event -- 21.15 Phytoplankton, planktonic foraminifera, and the carbon cycle -- 21.16 Diatoms and the silica cycle -- 21.17 Cretaceous climates. , 21.18 The sudden Paleocene-Eocene climatic shift -- 21.19 The cause of the Eocene-Oligocene climatic shift -- 21.20 The re-expansion of reefs during Oligocene time -- 21.21 Drier climates and cascading evolutionary radiations on the land -- References -- 22. Geobiology of the Anthropocene -- 22.1 Introduction -- 22.2 The Anthropocene -- 22.3 When did the Anthropocene begin? -- 22.4 Geobiology and human population -- 22.5 Human appropriation of the Earth -- 22.6 The carbon cycle and climate of the Anthropocene -- 22.7 The future of geobiology -- Acknowledgements -- References -- Index -- Colour plates.
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  • 3
    Book
    Book
    Malden, Mass. [u.a.] : Blackwell
    Keywords: Geomicrobiology ; Geomicrobiology ; Einführung ; Geomikrobiologie ; Geomikrobiologie ; Biomineralisation ; Geomikrobiologie
    Type of Medium: Book
    Pages: X, 425, [8] S. , Ill., graph. Darst.
    Edition: 1. publ.
    ISBN: 0632054549 , 9780632054541
    DDC: 579
    RVK:
    RVK:
    Language: English
    Note: Includes bibliographical references and index
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Sedimentology 52 (2005), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Lilypad stromatolites, up to 3 m long and 1·5 m wide, were found to be actively growing in the shallow marginal waters of Frying Pan Lake and its outflow channel. These stromatolites, composed of Phormidium (〉 90%), Fischerella, and a variety of other microbes, develop through a series of distinct growth stages. Dark green microbial mats cover the floor of the outflow channel and give rise to columns of various sizes and shapes in the shallower marginal waters. Once the columns reach the water level, the mats spread laterally to form a lilypad stromatolite. The lilypads are characterized by a raised, dark green rim, 4–5 mm high, that encircles a flat interior covered with a distinctive orange-red mat. The microbes forming the columns and lilypad plate are being actively silicified. The stromatolites are formed of: (i) flat-lying Phormidium filaments (P-laminae), (ii) upright filaments of Phormidium that are commonly associated with Fischerella (U-laminae), and (iii) mucus, diatoms and pyrite framboids (M-laminae). P-laminae dominate most of the columns, with tripartite cycles of P-, U-, to M-laminae being found mostly in the upper parts of the stromatolites. The transition from the P- to U-laminae is marked by a change in the growth pattern of the Phormidium and branching of Fischerella, which was probably triggered by a change in environmental conditions. In the Frying Pan Lake outflow channel, this change may be related to fluctuations in water level and flow rates that are caused by periods of heavy rain, seasonal changes, long-term variations in rainfall, and/or the unique 40-day hydrological cycle that exists between Frying Pan Lake and Inferno Crater, which is a nearby hydrothermal crater lake.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Silicified deposits, such as sinters, occur in several modern geothermal environments, but the mechanisms of silicification (and crucially the role of microorganisms in their construction) are still largely unresolved. Detailed examination of siliceous sinter, in particular sections of microstromatolites growing at the Krisuvik hot spring, Iceland, reveals that biomineralization contributes a major component to the overall structure, with approximately half the sinter thickness attributed to silicified microorganisms. Almost all microorganisms observed under the scanning electron microscope (SEM) are mineralized, with epicellular silica ranging in thickness from 〈 5 μm coatings on individual cells, to regions where entire colonies are cemented together in an amorphous silica matrix tens of micrometres thick. Within the overall profile, there appears to be two very distinct types of laminae that alternate repeatedly throughout the microstromatolite: ‘microbial’ layers are predominantly consisting of filamentous, intact, vertically aligned, biomineralized cyanobacteria, identified as Calothrix and Fischerella sp.; and weakly laminated silica layers which appear to be devoid of any microbial component. The microbial layers commonly have a sharply defined base, overlying the weakly laminated silica, and a gradational upper surface merging into the weakly laminated silica. These cyclic laminations are probably explained by variations in microbial activity. Active growth during spring/summer allows the microorganisms to keep pace with silicification, with the cell surfaces facilitating silicification, while during their natural slow growth phase in the dark autumn/winter months silicification exceeds the bacteria’s ability to compensate (i.e. grow upwards). At this stage, the microbial colony is probably not essential to microstromatolite formation, with silicification presumably occurring abiogenically. When conditions once again become favourable for growth, recolonization of the solid silica surface by free-living bacteria occurs: cell motility is not responsible for the laminations. We have also observed that microbial populations within the microstromatolite, some several mm in depth, appear viable, i.e. they still have their pigmentation, the trichomes are not collapsed, cell walls are unbroken, cytoplasm is still present and they proved culturable. This suggests that the bulk of silicification occurred rapidly, probably while the cells were still alive. Surprisingly, however, measurements of light transmittance through sections of the microstromatolite revealed that photosynthetically active light (PAL) only transmitted through the uppermost 2 mm. Therefore the ‘deeper’ microbial populations must have either: (i) altered their metabolic pathways; (ii) become metabolically inactive; or (iii) the deeper populations may be dominated by different microbial assemblages from that of the surface. From these collective observations, it now seems unequivocal that microstromatolite formation is intimately linked to microbial activity and that the sinter fabric results from a combination of biomineralization, cell growth and recolonization. Furthermore, the similarities in morphology and microbial component to some Precambrian stromatolites, preserved in primary chert, suggests that we may be witnessing contemporaneous biomineralization processes and growth patterns analogous to those of the early Earth.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology reviews 20 (1997), S. 0 
    ISSN: 1574-6976
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The spontaneous precipitation of amorphous iron hydroxide and ferric hydroxysulfate has generally been considered to be an inorganic process involving the oxidation of ferrous iron with or without the presence of sulfate. However, our study of bacterial communities growing in an acid mine drainage lagoon sediment has confirmed that microorganisms were also capable of facilitating this mineral precipitation. Transmission electron microscopy revealed that bacteria growing at the surface had iron-rich capsules, along with detectable amounts of Zn, Ti, Mn and K incorporated into the mineralised matrix. In the subsurface, more cells were associated with granular, fine-grained mineral precipitates, composed almost exclusively of iron and sulfur. Pore water profiles indicated that no discernible sulfate reduction had taken place, suggesting that these authigenic minerals were ‘ferric hydroxysulfate’, and not iron sulfide. Energy dispersive X-ray spectroscopy further indicated that the subsurface minerals had variable composition, with the Fe:S ratio decreasing with depth from 3.5:1 at 15 cm to 1.9:1 at 30 cm. This indicates the high reactivity of ferric hydroxide for dissolved sulfate. Because iron reduction was limited to sediment depths between 3–10 cm, it is conceivable that these minerals are not amenable to bacterial reduction, and hence, the ability of bacteria to bind and form such precipitates may provide a natural solution to cleansing acidified waters with a high dissolved metal content.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology reviews 20 (1997), S. 0 
    ISSN: 1574-6976
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Transmission electron microscopy examination of bacterial cells, growing naturally in freshwater and marine environments, reveals that they can precipitate a variety of iron minerals. The development of these authigenic mineral phases may be either ‘biologically controlled’, whereby the cell regulates mineral formation, or ‘biologically induced’, with biominerals commonly generated as secondary by-products of microbe-environment interactions. With the vast majority of bacteria biomineralisation is a two-step process; initially metals are electrostatically bound to the anionic surfaces of the cell wall and surrounding organic polymers, where they subsequently serve as nucleation sites for crystal growth. Because of its relatively high activity in aqueous solutions, iron is preferentially bound to reactive organic sites. As the latter stages of mineralisation are inorganically driven, the type of iron mineral formed is inevitably dependent on the available counter-ions, and hence, the chemical composition of the waters in which the microorganisms are growing.
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 2023-02-08
    Description: This dataset contains molybdenum and uranium concentrations; uranium isotope compositions; pertinent major element concentrations; and total organic carbon contents of black shales from the ~2 Ga upper Zaonega Formation, NW-Russia. The samples originate from the Onega Parametric Borehole (OPH). This data was collected via X-ray fluorescence spectroscopy, multi-collector inductively-coupled plasma mass spectrometry and carbon analysis.
    Keywords: Aluminium oxide; Calcium oxide; Carbon, organic, total; Core; DEPTH, sediment/rock; Drilling/coring; Magnesium oxide; MC-ICP-MS (Thermo Scientific, Neptune); Molybdenum; molybdenum isotopes; Onega_Parametric_Borehole; OPH; Paleoproterozoic; Phosphorus; Russia; Sample code/label; Sample ID; Silicon dioxide; trace metals; Uranium; Uranium isotopes; X-ray fluorescence spectrometry; Zaonega Formation; δ234 Uranium; δ238 Uranium; δ238 Uranium, standard error
    Type: Dataset
    Format: text/tab-separated-values, 1035 data points
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  • 9
    Publication Date: 2023-07-10
    Description: This dataset contains molybdenum, uranium, and rhenium concentrations; molybdenum isotope compositions; pertinent major element concentrations; and total organic carbon contents of black shales from the ~2 Ga upper Zaonega Formation, NW-Russia. The samples originate from drill cores OnZaP 1 and 3. This data was collected using (multi-collector) inductively-coupled plasma mass spectrometry, inductively-coupled plasma optical emission spectrometry, carbon analysis, and loss on ignition.
    Keywords: Aluminium oxide; Calcium oxide; Carbon, organic, total; Depth, composite; DEPTH, sediment/rock; Drilling/coring; Event label; ICP-MS, Thermo Scientific, Element 2; ICP-OES; Magnesium oxide; Molybdenum; molybdenum isotopes; Multi-Collector ICP-MS (MC-ICP-MS); OnZaP-1; OnZaP-3; Paleoproterozoic; Phosphorus; Rhenium; Russia; Sample code/label; Sample ID; Silicon dioxide; trace metals; Uranium; Uranium isotopes; Zaonega Formation; δ98/95Mo; δ98/95Mo, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 2487 data points
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  • 10
    Publication Date: 2018-12-17
    Description: The Boolgeeda Iron Formation and overlying Turee Creek Group, Hamersley Basin, Western Australia, represent a conformable succession of sediment deposited between 2.45 and 2.22 Ga. This interval of geologic history is of significant interest because it spans the Great Oxidation Event (GOE), when oxygen first accumulated in Earth’s atmosphere. Here we present geochemical and petrographic data from the uppermost 45 m of the Boolgeeda Iron Formation and an additional 30 m of the overlying Kungarra Formation mudstones, as sampled from the Turee Creek Drilling Project 1 drill core (TCDP1). This core captures the termination of BIF deposition in the Hamersley Basin and coincides with a global decline in BIF deposition in the Paleoproterozoic. We provide a continuous, high resolution chemostratigraphic dataset of major and trace element concentrations, as well as Fe speciation data, to assess the relationship between the rise of atmospheric oxygen and the subsequent decline in BIF deposition. We also highlight the interplay between local and global controls on the preservation of redox signatures, including the rise and fall of local base-level, input of weathered continental material, influx of reduced sulfur species associated with the continental weathering, and global increases in atmospheric oxygen. We interpret Boolgeeda deposition to have taken place under shallow water, oxic conditions overlying anoxic ferruginous deep water. Intermittent periods of oxidative weathering led to influxes of redox sensitive trace elements from land as continental sulfide minerals were weathered. This also led to the temporary disappearance of MIF-S, but O2 remained below the threshold capable of completely eliminating S isotope signatures associated with the MIF-S recycling.
    Type: Article , PeerReviewed
    Format: text
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