 | | Journal (article/letter/editorial) | | for the formation of “primary” hematite dust in banded iron formations via oxidation of iron silicate...for the formation of “primary” hematite dust in banded iron formations via oxidation of iron silicate...for the formation of “primary” hematite dust in banded iron formations via oxidation of iron silicate...deposition of banded iron formations (BIFs) envisage the oxidation of upwelled ferrous iron and the precipitation...that settled to form laterally extensive layers of iron-rich sediment. A fundamental tenet of this model |  | | Journal (article/letter/editorial) | | FRESHWATER FERROMANGANESE NODULES FROM GREEN BAY, LAKE MICHIGAN S E UN G Y EO L L E E AN D H U IF A NG X U *...ferromanganese nodules (FFN) from Green Bay, Lake Michigan have been investigated by X-ray powder diffraction...phases are todorokite, birnessite, and buserite. The iron-bearing phases are feroxyhyte, goethite, 2-line...Green Bay, Heterogeneous Nucleation, HRTEM, Lake Michigan, Todorokite, XRD. INTRODUCTION Freshwater ferromanganese...cm of lake-bottom sediments in Green Bay, Lake Michigan. The samples vary in diameter from ~0.5 to ~5 |  | Thibon, Fanny, Blichert-Toft, Janne, Tsikos, Harilaos, Foden, John, Albalat, Emmanuelle, Albarede, Francis (2019) Dynamics of oceanic iron prior to the Great Oxygenation Event. Earth and Planetary Science Letters, 506. 360-370 doi:10.1016/j.epsl.2018.11.016 | Journal (article/letter/editorial) | | www.elsevier.com/locate/epsl Dynamics of oceanic iron prior to the Great Oxygenation Event Fanny Thibon...Sciences, Rice University, Houston, TX 77005-1892, USA c Geology Department, Rhodes University, Grahamstown...Editor: L. Derry Keywords: banded iron formation Great Oxygenation Event iron isotopes cobalt model age...chemistry magnetite formation a b s t r a c t We report Fe isotope compositions in banded iron formations (BIF)...dissolved carbonate content of Early Proterozoic seas. Iron oceanic residence times increased from 0.2 to 2 |  | Percak-Dennett, Elizabeth M., Loizeau, Jean-Luc, Beard, Brian L., Johnson, Clark M., Roden, Eric E. (2013) Iron isotope geochemistry of biogenic magnetite-bearing sediments from the Bay of Vidy, Lake Geneva. Chemical Geology, 360. 32-40 doi:10.1016/j.chemgeo.2013.10.008 | Journal (article/letter/editorial) | | journal homepage: www.elsevier.com/locate/chemgeo Iron isotope geochemistry of biogenic magnetite-bearing...53706, USA NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI 53706, USA Institut...Vidy Sediment Microbial iron reduction Iron isotope geochemistry Magnetite formation a b s t r a c t Dissimilatory...Dissimilatory microbial iron oxide reduction (DIR) has been hypothesized to be an important respiratory...In particular, DIR has been implicated in the formation of magnetite in Precambrian marine sediments. |  | | Journal (article/letter/editorial) | | nano-precipitates in silician magnetite from banded iron formation: Z-contrast imaging and ab initio study†...5SiO4 occur in silician magnetite from a banded iron formation from Western Australia. In the Si-magnetite...Keywords: Si-magnetite, silician magnetite, banded iron formation, Z-contrast imaging, DFT Introduction There...high temperatures. These rock types include banded iron formations, mid-ocean ridge serpentinites, volcanogenic...stratigraphic subdivisions of the Brockman Iron Formation, Hamersley Group, Mt. Bruce Supergroup and |  | Cook, Nigel, Ciobanu, Cristiana, Ehrig, Kathy, Slattery, Ashley, Verdugo-Ihl, Max, Courtney-Davies, Liam, Gao, Wenyuan (2017) Advances and Opportunities in Ore Mineralogy. Minerals, 7 (12) 233 doi:10.3390/min7120233 | Journal (article/letter/editorial) | | assemblages. Using original examples, with an emphasis on iron oxide-copper-gold deposits, we show how increased...mining operations. A good example is hematite from iron oxide-copper-gold (IOCG) deposits, such as Olympic...provide valuable information on ore genesis, formation conditions, or serve as indicators in mineral...mineralogy provides insights into understanding formation of giant ore deposits, such as the giant Olympic...thin foils foils in-situ in-situ from from iron-oxides iron-oxides to to examine examine and and identify |  | | Journal (article/letter/editorial) | | Sciences, Stanford University, Stanford, CA 94305 USA (lowe@pangea.stanford.edu; mtice@pangea.stanford...which CH4/CO2<<1, preventing formation of an organic haze. The formation and weathering of large blocks...Transient CH4/CO2 ~1 resulted in the sporadic formation of organic haze, reflected in global deposition...Sciences, University of Colorado, Boulder, CO 80309, USA (mojzsis@colorado.edu) High-resolution ion microprobe...in δ34S/δ33S observed in pre2.47 Ga cherts, banded iron-formations, quartzite (metachert) and ferruginous |  | | Journal (article/letter/editorial) | | Hydrothermal plumes and the delivery of iron to banded iron formation A. E. Isley, Journal ofGeology, 103(2)...within the PaleoProterozoic Tuomivaara and Pabtavaara iron-formations, central and northern Finland S. Gebor...Earth Sciences, 31(12), 1994, pp 1791-1805. Formation of ligbt-hydrocarbon anomalies in oceanic waters...69-73. Report of centimeter-sized tektites in Pima County, Arizona, cannot be verified D. A. Kring, A. R...Tidal effects of disconnected hydrocarbon seas on Titan S. F. Dermott & C. Sagan, Nature, 374(6519), 1995 |  | Huberty, J. M., Konishi, H., Heck, P. R., Fournelle, J. H., Valley, J. W., Xu, H. (2012) Silician magnetite from the Dales Gorge Member of the Brockman Iron Formation, Hamersley Group, Western Australia. American Mineralogist, 97 (1) 26-37 doi:10.2138/am.2012.3864 | Journal (article/letter/editorial) | | from the Dales Gorge Member of the Brockman Iron Formation, Hamersley Group, Western Australia Jason M...magnetite from banded iron formation (BIF) in the Dales Gorge Member of the Brockman Iron Formation, Hamersley...the BIF oxide precipitate was not chemically pure iron oxyhydroxide/oxide. Magnetite domains display textures...in this BIF. Silician magnetite is the dominant iron oxide in the Dales Gorge BIF and is present in many...Keywords: Magnetite, silician magnetite, banded iron formation, Dales Gorge, Hamersley, biosignature Introduction |  | | Journal (article/letter/editorial) | | 209 The NevoriaGoldSkarnDepositin ArcheanIron-Formation, SouthernCrossGreenstoneBelt, Western Australia:...extend overa strike length ofmore thani kin.Iron-formation-hosted skarn contains 6 to7 g/tgold, 2 to3 g/tsilver...andmetakomatiite adjacent tocalcic skarn in banded iron-formation form broad(upto 17m)contact zones of outerbiotite-rich...in theamphibolites between andadjacent to the banded iron-formations. Theskarns arecutbybarren pegmatite...inCenozoic continental margins andfromgold-rich iron-copper skarns inCenozoic toMesozoic island-arc terranes |  | | Journal (article/letter/editorial) | | Geological Sciences, University of Michigan, Ann Arbor, MI 48109, USA (*correspondence: megwagn@umich.edu)...Reactive oxygen species generation by elemental iron and silver nanoparticulates T. DAVID WAITE*, ADELE...(*correspondence: d.waite@unsw.edu.au) Zero-valent iron nanoparticles (nZVI) are recognized to produce hydrogen...the reaction of the so-produced H2O2 with ferrous iron concomitantly produced on oxidation of Fe° [1]....because most of the reducing capacity of the elemental iron is utilized in the reduction of oxygen to water |  | | Journal (article/letter/editorial) | | supporting exotic forms of life unknown on Earth (Titan, Triton). Category IV applies to bodies that could...widely accepted accretion model of solar system formation proposes that planetary bodies form in situ around...sedimentary rock, a 3.85-billion-yearold banded iron formation on Akilia Island (Nutman et al., 1997)....basement bedrock and the Earth Mars, Europa, Ganymede Titan, Triton, Enceladus Mercury, Venus, Io Sun, Moon...Ganymede Callisto III IV III Enceladus Iapetus Titan IV IV IV IV Moons of Jupiter Io Moons of Saturn |  | Verdugo-Ihl, Max R., Ciobanu, Cristiana L., Slattery, Ashley, Cook, Nigel J., Ehrig, Kathy, Courtney-Davies, Liam (2019) Copper-Arsenic Nanoparticles in Hematite: Fingerprinting Fluid-Mineral Interaction. Minerals, 9 (7) 388 doi:10.3390/min9070388 | Journal (article/letter/editorial) | | was put forward [8], which could explain the formation of Au NPs. Ciobanu et al. [8] invoked devolatilization...have been used to identify conditions of ore-formation. In contrast, the potential constraints that could...NPs in hematite remain largely unexplored. The formation of uraninite NPs associated with pores in hematite...sample selected for this study originates from the iron oxide Cu-Au (IOCG) system at the Olympic Dam deposit...Helios Nanolab 600 instrument (FEI, Hillsboro, OR, USA). Three foils (foils #1, #2 and #3) were cut across |  | Keyser, , Ciobanu, , Cook, , Feltus, , Johnson, , Slattery, , Wade, , Ehrig, (2019) Mineralogy of Zirconium in Iron-Oxides: A Micron- to Nanoscale Study of Hematite Ore from Peculiar Knob, South Australia. Minerals, 9 (4) 244 doi:10.3390/min9040244 | Journal (article/letter/editorial) | | minerals Article Mineralogy of Zirconium in Iron-Oxides: A Micronto Nanoscale Study of Hematite Ore...hematite ore from the metamorphosed Peculiar Knob iron deposit, South Australia, contains anomalous concentrations...chemical precipitation of Fe-minerals (banded iron formation) is debatable, but such Fe-rich sediments...published data on the concentration of Zr in the common iron-oxides, magnetite (Fe3 O4 ) and hematite (α-Fe2...ppm Zr in hematitite from Quadrilátero Ferrífero iron formations in Brazil, while Cabral and Rosière [4] |  | | Journal (article/letter/editorial) | | Greenalite precipitation linked to the deposition of banded iron formations downslope from a late Archean carbonate...Greenalite precipitation linked to the deposition of banded iron formations downslope from a late Archean carbonate...Greenalite precipitation linked to the deposition of banded iron formations downslope from a late Archean carbonate...Jiangan Road, Guilin 541004, China ABSTRACT Banded iron formations (BIFs) were deposited as deep-water...are traditionally interpreted to have formed from iron oxides/hydroxides and silica that precipitated when |  | | Journal (article/letter/editorial) | | 102, pp. 1415–1440 Fluid Evolution and Origins of Iron Oxide Cu-Au Prospects in the Olympic Dam District...hydrothermal activity at a number of presently subeconomic iron oxide copper-gold systems in the Olympic Dam district...Dam district indicate the diversity of origins of iron oxide-copper-gold systems, even within the same...geologic region. Introduction IN HIS REVIEW of iron oxide copper-gold (IOCG) deposits, Hitzman (2000)...the lack of efficient traps or metal sources. The iron oxides may have formed concurrently with Cu-Au mineralization |  | | Report (issue) | | 8 10 12 13 14 Asbestos ore Lead ore, Balmat mine. N.Y. Chromite-chromium ore, Washington Zinc ore...ore, Friedensville, Pa. Banded iron-formation, Palmer, Mich. 6. Ribbon asbestos ore, Quebec, Canada 7.... Manganese ore, banded rhodochrosite 1. 2. 3. 4. 5. 8. Aluminum ore, bauxite, Georgia 9. Native copper...not yet discovered or not currently profitable to mine. The mining of mineral deposits, once discovered...R. p. FISCHER valent state and substitutes for iron and perhaps Titaniferous magnetite deposits are |  | Courtney-Davies, , Ciobanu, , Verdugo-Ihl, , Slattery, , Cook, , Dmitrijeva, , Keyser, , Wade, , Domnick, , Ehrig, , Xu, , Kontonikas-Charos, (2019) Zircon at the Nanoscale Records Metasomatic Processes Leading to Large Magmatic–Hydrothermal Ore Systems. Minerals, 9 (6) 364 doi:10.3390/min9060364 | Journal (article/letter/editorial) | | either mineralized or not, with the same style of iron-oxide copper gold (IOCG) mineralization. Although...Introduction Ore deposits falling within the broad iron-oxide-Cu–Au (IOCG) clan are a fascinating, and in...eastern Gawler Craton, South Australia (Figure 1A). Iron-oxide copper gold systems of various sizes are found...metasomatic processes and products, such as the formation of zircon nanoprecipitates and structural defects...of the Olympic Province. These include older banded iron formations [32] and younger U-mineralization |  | | Journal (article/letter/editorial) | | undergo further reactions that result in the formation of other saturated and unsaturated hydrocarbons...concentrations is accompanied by extensive organic haze formation. Hence, we ignore warming by these higher hydrocarbons...particles with optical constants similar to those of Titan tholins. As one example of the results, Fig. 9 shows...the relevant equilibrium constants in the siderite-iron silicate system would have been different, and the...abundance is larger than that of CO2, though, the formation of organic haze leads to a drastic cooling effect |  | | Journal (article/letter/editorial) | | University P.O. Box 871404 Tempe, AZ 85787-1404 USA Introduction The exploration for past or present...1) confirmed the role of running water in the formation of many small valley networks in the ancient southern...State University Box 871404 Tempe AZ 85287-1404 USA greeley@asu.edu N.Z. Boctor Europa has the possibility...Washington 5251 Broad Branch Rd., NW Washington, DC 20015 USA C.M.O’D. Alexander J. Wang E. Hauri Department of...Washington 5241 Broad Branch Rd., NW Washington, DC 20015 USA Introduction: Polycyclic aromatic hydrocarbons were |  | | Journal (article/letter/editorial) | | nanophase iron oxyhydroxides in freshwater ferromanganese nodules from Green Bay, Lake Michigan, with implications...ferromanganese nodules (FFN) from Green Bay, Lake Michigan, and adsorbed arsenate have been investigated...phases are todorokite, birnessite, and buserite. The iron-bearing phases are feroxyhyte, nanophase goethite... Glaciated regions around the Green Bay, Lake Michigan, contain sediments derived from Precambrian rocks...rocks that may be plentiful sources of iron, manganese, and trace elements (Rossmann and Callender 1968) |  | Ciobanu, Cristiana L., Verdugo-Ihl, Max R., Slattery, Ashley, Cook, Nigel J., Ehrig, Kathy, Courtney-Davies, Liam, Wade, Benjamin P. (2019) Silician Magnetite: Si–Fe-Nanoprecipitates and Other Mineral Inclusions in Magnetite from the Olympic Dam Deposit, South Australia. Minerals, 9 (5) 311 doi:10.3390/min9050311 | Journal (article/letter/editorial) | | characteristic of early, alkali-calcic alteration in the iron-oxide copper gold (IOCG) system at Olympic Dam....magmatic-hydrothermal spectrum, i.e., from banded iron formation (BIF) ores metamorphosed at low conditions...magnetite-bearing ores on the margins of the Olympic Dam Iron Oxide Cooper Gold (IOCG) deposit, South Australia...magnetite from location #1 and #4 (Figure 1b) [37]. Formation of such magnetite in the outer shell is attributed...scanning electron microscope (SEM) (FEI, Hillsboro, OR, USA) with energy dispersive X-ray spectrometry and back-scatter |  | | Journal (article/letter/editorial) | | Widespread Deposition of Greenalite to Form Banded Iron Formations before the Great Oxidation Event Janet...Widespread Deposition of Greenalite to Form Banded Iron Formations before the Great Oxidation Event,... Widespread Deposition of Greenalite to Form Banded Iron Formations before the Great Oxidation Event ...E-mail: janet.muhling@uwa.edu.au. Abstract Banded Iron Formations (BIFs) are Precambrian sedimentary...a very fine mud composed of nanoparticles of the iron-silicate greenalite. In places, the greenalite mud |  | Skirrow, R. G., Bastrakov, E. N., Barovich, K., Fraser, G. L., Creaser, R. A., Fanning, C. M., Raymond, O. L., Davidson, G. J. (2007) Timing of Iron Oxide Cu-Au-(U) Hydrothermal Activity and Nd Isotope Constraints on Metal Sources in the Gawler Craton, South Australia. Economic Geology, 102 (8) 1441-1470 doi:10.2113/gsecongeo.102.8.1441 | Journal (article/letter/editorial) | | Economic Geology, v. 102, pp. 1441–1470 Timing of Iron Oxide Cu-Au-(U) Hydrothermal Activity and Nd Isotope...craton hosts Australia’s premier uranium-bearing iron oxide copper-gold (IOCG) belt, the >500-km-long...data across two IOCG districts at the time of formation of the Olympic Dam deposit (ca. 1590 Ma). Magnetite-rich...com) and is one of the key deposits defining the iron oxide Cu-Au (IOCG) deposit class (Hitzman et al...1441 1442 SKIRROW ET AL. Three districts of iron oxide-rich alteration and Cu-Au ± U ± REE mineralization |  | | Journal (issue) | | STORM KILLER 19 19 GULF STREAM EDDIES TRANSPORT IRON TO NORTH ATLANTIC SUBTROPICAL GYRE 14 14 ALGAE...EARTH 4220 King Street Alexandria, VA 22302-1507, USA Phone: (703)379-2480 Fax: (703)379-7563 www.earthmagazine...Clearance Center, 222 Rosewood Dr., Danvers, MA 01923, USA. Phone: (978)750-8400. Fax: (978)646-8600. Any other...suggests that desert dust may also suppress the formation of severe storms and hurricanes in the southern...inversions that tend to prevent cloud and storm formation while also reducing the amount of sunlight reaching |
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