 | | Journal (article/letter/editorial) | | ceramics A new magnetic ceramics of nanosized magnetite, Fe3O4, presenting superparamagnetic behaviour..."composite" particle built up by a magnetised core of magnetite surrounded by a nonmagnetic surface layer. As...distribution as a function of the core radius (upper curve) and scattering length density profile (lower...magnetic materials has been recently discussed by Löffler, Braun& Wagner, 1999. (c) η (-) η (+) η (nuc)...Wiedenmann, A. (1998). J. Appl. Phys., 85 , 2279-2286. Löffler, J., Wagner, W., Van Swygenhoven, H., & Wiedenmann |  | Leitão, Patrícia, Tucci, Matteo, Cruz Viggi, Carolina, Nouws, Henri, Danko, Anthony S., Aulenta, Federico (2022) Natural Magnetite Minerals Enhance 1,2-Dichloroethane Reductive Dechlorination. Minerals, 12 (7) 816 doi:10.3390/min12070816 | Journal (article/letter/editorial) | | minerals Article Natural Magnetite Minerals Enhance 1,2-Dichloroethane Reductive Dechlorination Patrícia...; Nouws, H.; Danko, A.S.; Aulenta, F. Natural Magnetite Minerals Enhance 1,2-Dichloroethane Reductive...study, we applied, for the first time, natural magnetite and hematite to accelerate the reductive dechlorination...anaerobic microcosms. After four feeding cycles, low magnetite-amended microcosms (13 mg/L) yielded the highest...minerals in contaminated ecosystems. Keywords: magnetite; hematite; conductive particles; reductive dechlorination; |  | Járóka, Tom, Seifert, Thomas, Pfänder, Jörg A., Staude, Sebastian, Seibel, Henning V.L., Krause, Joachim, Bauer, Matthias E. (2019) Geology, sulfide mineralogy and petrogenesis of the Angstberg Ni-Cu-(PGE) sulfide mineralization (Lausitz Block, Bohemian Massif, Germany): A potential Ni-Cu exploration target in Central Europe?. Ore Geology Reviews, 110. 102924 doi:10.1016/j.oregeorev.2019.05.010 | Journal (article/letter/editorial) | | olivine-rich crystal mush during magma rise to upper 46 levels. The sulfide-matrix breccias also resulted...Early Carboniferous age which are spread in the Upper Lusatian Highlands in 66 vicinity to the German-Czech...1903; Bautsch, 1963; 67 Peschel et al., 1973; Löffler, 1974; Bautsch and Rohde, 1975; Kramer, 1976; Rohde...and gravel in an open pit operation (Grenzland-I quarry) between 1938 and 2002. Some 81 disseminated...interconnected mafic-(ultramafic) magmatic system in the upper crust (Peschel et al., 1973; Nöldeke et al., 1988; |  | | Journal (article/letter/editorial) | | sedimentary rocks composed of major amounts of magnetite, hematite and quartz, with variable atnounts of...orientations of preceding primary minerals (e.g. magnetite, goethite, siderite/calcite, ankedte/dolomite)...type composed of major amounts of iron oxide (magnetite, hematite) and quartz, with variable amounts of...(pseudomorph of hematite after magnetite), accompanied by minor amounts of magnetite, kenomagnetite, and/or goethite...of martite (with only secondary indications of magnetite), intergranular hematite and specLilartite on |  | | Book (edition) | | (light to dark greys); betekhtinite (homogenous upper grey rim). Opacity/Diaphaneity Most minerals described...be observed in adjacent grains. Left: Simple (upper right) and complex (lower left) twinning of gudmundite...Thus, oxides such as chromite, ilmenite, and magnetite plus PGE alloys separate from the siliceous melt...grey). 10 Cumulus (continued) Right: Skeletal magnetite in the siliceous matrix of a basalt (light grey...grey crystals). Right: Dendritic magnetite in a historic Etruscan slag (lighter grey), again in a silicate |  | | Journal (article/letter/editorial) | | Experimental methods of hematite formed by oxidation of magnetite, is present in significant amounts (~40 wt%) in...goethite and quartz as major phases, and kaolinite, magnetite, gibbsite as minor constituents. Specularite (~90...Costa and de Jesus Filho 1992; Jiang et al. 2000; Löffler and Mader 2006). In the work of Wolska and Szajda...above 800 °C, certainly due to the oxidation of magnetite (Forsmo et al. 2008). Isomorphic substitution...(2008) Mechanisms in oxidation and sintering of magnetite iron ore green pellets. Powder Technol 183:247–259 |  | | Journal (article/letter/editorial) | | folds. The Swakop Terrane was metamorphosed to upper amphibolite-facies conditions with anatexis in the...sillimanite porphyroblasts, normally occurs at the upper part of these upward-fining cycles. Lenses and layers...the Hakos Terrane (Kasch,1983; Hoffmann,1987; Löffler and Porada,1987) where primary sedimentary features...part of this amphibolite is interlayered with the upper beds of the Quelle Formation (Figure 6). Against...interbedded with Omusema amphibolite. The bottom and upper contacts are sharp but along the sides the conglomerate |  | | Journal (issue) | | terrestrial mammal-based biozonation of the European Upper Oligocene. - lnt. J. Earth Sei. 96, 353-361. NOSTIZ...Pararammelsbergit), South Lorrain Township, Timiskaming District, Ontario, Kanada. Burgessit bildet hier rosettenförmige...Typlokalität, der Barium-Lagerstätte Shiti, Hanbin-District, Präf. Ankang, Prov. Shaanxi, China, und drei...südl ichen Teil von Bruch IV überblicken. Foto Löffler. durchgeführt. In Einzelfällen wurde auch die...Förderanlage und der See im abgesoffenen Bruch II . Foto Löffler. Mineralien-Welt 3/2011 75 Österreich kann |  | Stetten, L., Mangeret, A., Brest, J., Seder-Colomina, M., Le Pape, P., Ikogou, M., Zeyen, N., Thouvenot, A., Julien, A., Alcalde, G., Reyss, J.L., Bombled, B., Rabouille, C., Olivi, L., Proux, O., Cazala, C., Morin, G. (2018) Geochemical control on the reduction of U(VI) to mononuclear U(IV) species in lacustrine sediments. Geochimica et Cosmochimica Acta, 222. 171-186 doi:10.1016/j.gca.2017.10.026 | Journal (article/letter/editorial) | | yield nanocrystalline uraninite at the surface of magnetite, Fe3O4, and green rust (O'Loughlin et al., 2003...of U(IV) with depth (Figure 4b, Table 1). In the upper samples, at 2 cm, the proportion of U(IV) was already...identify the nearest neighbor atoms around U. For the upper sample, a good fit was obtained with 1.2 U-O scattering...the major fraction of both U(VI) and U(IV) in the upper and deeper sediment samples studied could be bound...Fe(II)-bearing minerals such as vivianite or magnetite have also been reported to reduce U(VI) to U(IV) |  | | Journal (article/letter/editorial) | | located in the famous Tongling-Anqing Cu skarn district in eastern China, is a principal Cu–Fe ore field...with an outcropped area of about 11 km2 in the district. It is composed mostly of diorite with minor quartz...mainly composed of Cu sulfide-bearing massive magnetite and unmineralized skarns, with minor disseminated-copper...orebodies composed of Cu sulphide-bearing massive magnetite occur as irregular lenses scattered in concaves...especially composed of Cu-sulphide bearing massive magnetite ores, are generally recognized as the low resistivity |  | | Journal (article/letter/editorial) | | Geology, Peter-Tunner-Straße 5, A-8700 Leoben, Austria * Corresponding author: schulzhm@gfz-potsdam...rather Gas and Condensate potential whereas the upper part of the Koporie Formationstill has the inherited...zircon (used for uranium-lead dating), rutile, magnetite or other Fe-oxides (Latta et al., 2014; Wang et...homogenous black bituminous argillite prevails in the upper part (see also Fig. 4). In contrast to recent findings...strata is an erosional boundary. The Lower and Upper Devonian (Frasnian) sediments are incomplete whereas |  | Roberts, Andrew P., Chang, Liao, Heslop, David, Florindo, Fabio, Larrasoaña, Juan C. (2012) Searching for single domain magnetite in the “pseudo-single-domain” sedimentary haystack: Implications of biogenic magnetite preservation for sediment magnetism and relative paleointensity determinations. Journal of Geophysical Research: Solid Earth, 117. doi:10.1029/2012jb009412 | Journal (article/letter/editorial) | | 1029/2012JB009412, 2012 Searching for single domain magnetite in the “pseudo-single-domain” sedimentary haystack:...haystack: Implications of biogenic magnetite preservation for sediment magnetism and relative paleointensity...has been reported in the literature and that magnetite magnetofossils (the inorganic remains of magnetotactic...more robust basis for understanding how biogenic magnetite contributes to the magnetization of sediments...Larrasoaña (2012), Searching for single domain magnetite in the “pseudo-single-domain” sedimentary haystack: |  | Tumiati, Simone, Merlini, Marco, Godard, Gaston, Hanfland, Michael, Fumagalli, Patrizia (2020) Orthovanadate wakefieldite-(Ce) in symplectites replacing vanadium-bearing omphacite in the ultra-oxidized manganese deposit of Praborna (Aosta Valley, Western Italian Alps). American Mineralogist, 105 (8). 1242-1253 doi:10.2138/am-2020-7219 | Journal (article/letter/editorial) | | retrogressed to greenschist facies, toward the upper levels in contact with Mn-poor metasediments, mostly...oxidized basal levels and 1243 the less oxidized upper levels. The basal levels (DFMQ > +12.5; Tumiati...(up to 64 mol% jadeite: Tumiati et al. 2015). The upper levels are characterized by the assemblage garnet...and Ce/La = 2.36 (Tumiati et al. 2015). In the upper levels, manganiandrosite-(Ce) occurs instead of...the basal braunite-piemontite-rich level and the upper garnet-rich levels, a 10 cm sized Mn-poor emerald-green |  | | Book | | the purchaser of the work. Cover illustration: Upper left: NGC 6188, a dust cloud in Ara OB1 association...astrodon.com/_img/image/gallery/2/NGC6188Web4.jpg Upper right:: Solar system montage of Voyager images....experts from 16 different countries: Australia; Austria; France; Germany; Hungary; India; Israel; Italy;...carbonate minerals with Fe-sulphide phases and magnetite within partially dissolved carbonate, biomediated...anaerobic bacteria. A resemblance of this magnetite to magnetite in magnetotactic bacteria was pointed out |  | 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) | | twins (r~85◦ to hematite elongation), relict magnetite and fields of sub-micron-wide inclusions of baddeleyite...concentration of Zr in the common iron-oxides, magnetite (Fe3 O4 ) and hematite (α-Fe2 O3 ). Dawson et...al. [1] report a maximum of 0.21 wt. % ZrO2 in magnetite from African carbonatites, and Reguir et al. [2]...data for magnetite in calciocarbonatite from the Kerimasi volcano, Tanzania, showing that magnetite is a...comprising the Skylark Metasediments include quartz-magnetite-feldspar-clinopyroxene-orthopyroxene-apatite units |  | | Journal (article/letter/editorial) | | the c-axes of the crystals. The drawing in the upper left corner indicates possible primary twin orientations...orientations (i = 1, 2, 3, 4; see illustration in the upper left corner of Fig. 6a with 12 possible H|Ri). Small...according to OR-2, as shown in the drawing in the upper left corner of the TEM image. Red lines indicate...equivalent plane belongs to the {401}R family. EDP (upper right corner) recorded over the hematite and the...OR-2 (left) for comparison. The stereogram in the upper left corner illustrates the observed crystallographic |  | Cheng, Meng, Li, Chao, Jin, Chengsheng, Wang, Haiyang, Algeo, Thomas J., Lyons, Timothy W., Zhang, Feifei, Anbar, Ariel (2020) Evidence for high organic carbon export to the early Cambrian seafloor. Geochimica et Cosmochimica Acta, 287. 125-140 doi:10.1016/j.gca.2020.01.050 | Journal (article/letter/editorial) | | Precambrian/Cambrian boundary (541 Ma) within the upper Liuchapo Formation based on organic and inorganic...the sum of Fe in pyrite, carbonate (Fecarb), magnetite (Femag), and oxides (Feox). FeHR/FeT values of...carbonate (Fecarb), reducible oxides (Feox), and magnetite (Femag) (Poulton and Canfield, 2005), and an improved...m thickness of the study section and lower and upper boundary ages of 522 Ma and 518 Ma (see Section...Enrichment factors (EFs) were calculated relative to the upper continental crust (UCC) as follows: XEF = (X/Al)sample |  | Le Pape, Pierre, Stetten, Lucie, Hunault, Myrtille O.J.Y., Mangeret, Arnaud, Brest, Jessica, Boulliard, Jean-Claude, Morin, Guillaume (2020) HERFD-XANES spectroscopy at the U M-edge applied to the analysis of U oxidation state in a heavily contaminated wetland soil. Applied Geochemistry, 122. 104714pp. doi:10.1016/j.apgeochem.2020.104714 | Journal (article/letter/editorial) | | J.; Kemner, K. M.; Fletcher, K. E.; Rui, X.; Löffler, F. E. Solution and Microbial Controls on the Formation...Transformations after U(VI) Coprecipitation with Magnetite Nanoparticles. Environ. Sci. Technol. 2017, 51...the One-Electron Reduction of U(VI) to U(V) on Magnetite. Environ. Sci. Technol. 2015, 49 (10), 6206–6213 |  | | Journal (issue) | | SEPTEMBER–OCTOBER 2022 Articles The Akchatau mine, Shet District, Karaganda, Kazakhstan..................573 by...recently he had been concentrating on the Tintic district in Utah and amassed many self-collected specimens...illustrated in his 1972 article on the Fairfax quarry in the Mineralogical Record, and on page 255 of...favorite collecting spots was the famous Auglaize quarry in Paulding County, Ohio. He kept meticulous records...large quarry hundreds of specimens were found and how their habits varied. His report on the quarry, coauthored |  | Lu, Xinze, Kendall, Brian, Stein, Holly J., Li, Chao, Hannah, Judith L., Gordon, Gwyneth W., Ebbestad, Jan Ove R. (2017) Marine redox conditions during deposition of Late Ordovician and Early Silurian organic-rich mudrocks in the Siljan ring district, central Sweden. Chemical Geology, 457. 75-94 doi:10.1016/j.chemgeo.2017.03.015 | Journal (article/letter/editorial) | | Silurian organic-rich mudrocks in the Siljan ring district, central Sweden Xinze Lu, Brian Kendall, Holly...Silurian organic-rich mudrocks in the Siljan ring district, central Sweden. The address for the corresponding...Silurian organic-rich mudrocks in the Siljan ring district, central Sweden Xinze Lua *, Brian Kendalla,...(Aeronian-Telychian) Kallholn Formation (Siljan ring district, Sweden). The magnitude of Re, Mo, and U enrichments...shales ED stratigraphically equivalent to the upper Kallholn Formation were deposited from oxygenated |  | | Journal (article/letter/editorial) | | Because most obsidians contain nanoinclusions of magnetite. ‘Fire’ obsidian, a variety of obsidian from Oregon...thick, consist of concentrated nanocrystals of magnetite, giving rise to brilliant colors in reflection...change in the helium composition over time with an upper limit (2!) of 0.16‰ per year decrease in 3 He/4He...nature of heterogeneity of the northwestern Pacific upper mantle. Basalts were collected from twelve petit-spot...have been produced by melting of lower crust and upper crustal veneer due to meteorite impact at ~1850 |  | | Journal (issue) | | Carboniferous of Nötsch (Eastem Alps, Carinthia, Austria). - Jb. Geol. B.-A.134 (1), 65-81. NIEDERMAYR,G...HUBER,P.A.;KNOBLOCH,G.;KÖLLER,R.;KOLITSCH, U.; LÖFFLER,E.; NEUHOLD, F.; POEVERLEIN,R.; POSTL, W.; PRASNIK...KOCH, G.; KOLITSCH, U.; KONZETT, J.; LEIKAUF, B.; LÖFFLER, E.; POSTL, W.; PRASNIK, H.; PRAYER,A.; PRISTACZ...Phlogopit-Kristalle (Oxiphlogopit??) und kleine Magnetite in der Paragenese zu finden. Mineralien-Welt 3/2013...Der volle Name wurde gewählt, um Verwechslungen District, Huancavelica, Peru. Mit freundlicher Genehmigung |  | | Journal (issue) | | of organized seismie energy through the eomplex upper erust. This explanation is questioned as other refleetions...oflower erust imbrieations (with a minor admixture of upper mantle) aeeommodated by ('inducted into') the ductile...of slightly more than 100 km. (3) The subducted upper mantle, for which there are no refleetion data....Section (b) (Fig. 4) across the Grimsel Pass and the upper end ofLago Maggiore converges with section (a) in...simultaneously, the External Massifs are the stack of upper crust duplexes due to the normal component (that |  | | Book | | their progeny concentrations in the dwellings of district Hamirpur, Himachal Pradesh, India . . . . . ....Omed Mustafa Radon measurement along faults in the Upper Rhine Graben with standardized methods . . . . ...channels. A third type of deposit, in impregnated magnetite, is currently being prospected, but has not reached...westwards from the Great Escarpment during the upper Cretaceous and the lower Cenozoic periods. The main...uraniferous magnetite. Beside its uranium activities, RUN has also evaluated a magnetite discovery named |  | | Book | | settlement. The slags are mainly composed of olivine, magnetite and ultrabasic glass with rare inclusions of metallic...Bronze Age settlement of Kamenny Ambar (Kartaly district of Chelyabinsk region), where they are widely...consists of newly formed crystals of olivine, magnetite and glass-like phase, at times the inclusions...of small chain and feather olivine crystals. Magnetite forms idiomorphic aggregates of 5–15 microns in...symplectites in olivine crystals. The amount of magnetite in the sample usually does not exceed 5%. Relic |
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