 | | Journal (article/letter/editorial) | | Oxfordian pelagic limestones of Aguilon in northern Spain have yielded the only reproducible magnetic polarity...Aguilon, and at various other localities in northern Spain and southern Portugal, failed to yield polarity...(Sigaloceras calloviense Zone) consist of sandstones and sandy crinoidal limestones containing bivalves, brachiopods...shown. G. Sample OCZL (Zalas; Lower Callovian, sandy crinoidal limestone), characteristic direction (300-450°C)...6 km southwest of Krzeszowice. Lower Callovian sandy crinoidal limestone is overlain by Upper Callovian |  | | Journal (article/letter/editorial) | | UK c Dpto. Geologia, Universidad Zaragoza, 50009 Zaragoza, Spain d Department of Physics and Astronomy...from the Middle Devonian Trentishoe Formation, a sandy ephemeral stream and clay playa complex, from North...grey colours are present in the coarser silty or sandy laminae and burrows, while the mud laminae are generally...oxides and oxyhydroxides including goethite, maghemite, gibbsite. Simple mineralogy with haematitie...Sedimentologia. Tesis Doctoral, Universidad de Zaragoza, Zaragoza, 314 pp. Goldbery, R. and Beyth, M., 1984 |  | | Report (volume) | | Early Ordovician age Toluca Granite and granite of Sandy Mush. The stream-sediment samples were taken as...1884 by Dr. C. W. Dabney. In 1894, the vertical mine shaft of the Kings Mountain Mineral and Development...listed 36 mines and prospects of which the Ross mine and adjacent placer at Gaffney, S.C., worked from...Kesler, 1942). The deepest working was at the Jones mine, which was 11 km northeast of the city of Kings...Tube Company of Chicago reopened the old Faires mine near the city of Kings Mountain (Kesler, 1942). |  | | Journal (article/letter/editorial) | | soluble minerals (kaolinite, hematite, goethite, maghemite, gibbsite, anatase and boehmite) and the most...sheet on all rock types. Transported hematite–maghemite-rich gravels at the base of the palaeochannel...ferruginous gravels and/or duricrust and adjacent sandy depositional areas. Mabbutt et al. (1963) relied...and oxyhydroxides of iron (goethite, hematite, maghemite) and hydroxides of aluminium (gibbsite)’. These...and oxyhydroxides of Fe (goethite, hematite, maghemite), hydroxides of aluminium (e.g. gibbsite, boehmite) |  | Anand, R.R., Hough, R.M., Salama, W., Aspandiar, M.F., Butt, C.R.M., González-Álvarez, I., Metelka, V. (2019) Gold and pathfinder elements in ferricrete gold deposits of the Yilgarn Craton of Western Australia: A review with new concepts. Ore Geology Reviews, 104. 294-355 doi:10.1016/j.oregeorev.2018.11.003 | Journal (article/letter/editorial) | | constituents of these units are goethite, hematite, maghemite, kaolinite and quartz. They are commonly overlain...Biological features in ferricrete in natural outcrops and mine pit walls 8 Mechanisms of formation of nodules...and aeolian deposits (Anand and Paine, 2002). Maghemite is a common mineral on the landsurface, occurring...underlying mottled zone (Anand and Paine, 2002). Maghemite probably formed by the heating of goethite during...inset-valleys, magnetic nodules and pisoliths containing maghemite occur as scattered granules, as lenses or as thick |  | | Journal (article/letter/editorial) | | Archaeology, Universitat de Barcelona, 08001 Barcelona, Spain; esther.trave@ub.edu; Tel.: +34-93-403-79-45 ...fired samples reached higher temperatures, but maghemite is absent in all cases. The main mineral assemblage...constant presence of illite and the absence of maghemite or other high temperature mineral phases. Samples... quartz, plagioclase, potassium feldspar and maghemite is the common mineral assemblage, and illite peaks—if...represented for this range, with and without maghemite (d). The number of samples per mineral fabric |  | Schindler, Michael, Lanteigne, Sonia, McDonald, Andrew M., Hochella, Michael F. (2016) Evidence of CU- and NI-Bearing Surface Precipitates and Adsorption Complexes In Remediated Soils At the Nanoscale: A Tem, Micro-Raman, and Laser-Ablation ICP-MS Study of Mineral Surface Coatings. The Canadian Mineralogist, 54 (1) 285-309 doi:10.3749/canmin.1500082 | Journal (article/letter/editorial) | | southern Italy (Terzano et al. 2007); southwestern Spain (Chopin & Alloway 2007); the Kola Peninsula, Russia...the upper horizons are predominantly composed of sandy silt with a minor (,1%) clay-size component (Lanteigne...locations are characterized by light brown silty to sandy soils upon which grasses, bushes, and small trees...most likely ferrihydrite, schwertmannite, and maghemite. Silicate minerals were not unequivocally identified...matrix containing aggregates of goethite and maghemite, as well as euhedral [cube {100}] crystals of |  | | Journal (article/letter/editorial) | | matrix and in ferruginous clasts and pisoliths. Maghemite is a common constituent of the pisoliths. The...Quaternary Sediments ~=~ approximate level Undefined sandy sediments Tertiary limestonesof marine origin Weathered...intensive kaolinisation are also characteristic of sandy intervals in the predominantly clay-rich Pleistocene...hematite and goethite, but maghemite also occurs. Goethite, hematite and maghemite in the ferricretes we have...lines in its diffraction pattern. Hematite and maghemite have smaller displacements of diffraction lines |  | | Journal (article/letter/editorial) | | anatase with traces of corundum, boehmite and maghemite in hardcap. 1. Introduction [ ~|Con¢,,-,,o~,s...and Kobe Alumina (Associates) Pty. Ltd. (10%) to mine, transport and refine bauxite initially from its...and Worsley Alumina's facilities. Tunnell Road mine site, just north of Mt. Saddleback, ~ 100 km SSE...7 Mt of bauxite will be mined annually. From the mine, crushed bauxite is transported 51 km via a cable...is railed for shipment (Fig. 1). The Tunnell Road mine site has an average annual rainfall of ~ 730 mm |  | | Journal (article/letter/editorial) | | west of Yaopengzi fault, and includes carbonaceous/sandy shale and siltstone interbeds (over 100 m thick)...greyish phyllite and interbeds of purplish-red sandy shale, sandstone, and conglomerate. Hematite mineralization...rocks are widely found in outcrops and underground mine tunnels, and include mainly gabbroic and doleritic...The anticlinal core is composed of the tuffaceous sandy shale of the lower Yinmin Formation, whilst the...massive/brecciated/banded magnetite and (minor) hematite/maghemite, veined and disseminated chalcopyrite, and supergene |  | | Journal (article/letter/editorial) | | concentration and grain size of pedogenic magnetite/maghemite. Longterm changes of the pre-CBD magnetic properties...extraction to remove very finegrained magnetite and maghemite from coarse-grained magnetite. However, the CBD...fine-grained secondary iron oxides, including maghemite, hematite, goethite and pedogenic magnetite [Fine...interpreted as the conversion of metastable cubic maghemite (gFe2O3) to weakly magnetic rhombohedral hematite...450C results from the inversion of fine-grained maghemite to hematite. Such a susceptibility drop is more |  | | Journal (article/letter/editorial) | | oxidized magnetic phases such as hematite and/or maghemite seem to correlate to extreme warm periods like...the section [T1 = Carbonate turbidite level; T2 = Sandy turbidite level; T3 = Belluno Flysch turbidite;...rock-magnetic experiments showed that a magnetite–maghemite mixture dominates the lower gray-greenish ~20...~20 m of the section, and that a hematite–maghemite mixture dominates the mid-upper part of the section...coercivity phases within the triad magnetite–maghemite–hematite, whereby the lower the ratio, e.g. in |  | | Journal (article/letter/editorial) | | viscous superparamagnetic minerals (magnetite/maghemite) as shown by high values of magnetic susceptibility...ferrimagnetic minerals (predominantly magnetite and maghemite). Time domain (pulse induction) detectors are...the detectors are unable to detect minimum metal mine targets within specified depths (Guelle et al., 2006)...detectors. The provenance of SP/SSD magnetite and maghemite in soils is primarily pedogenic and constitutes...explain the accumulation of SP/SSD magnetite and maghemite in soils, including fire, but most authors follow |  | Bishop, Michael E., Jaisi, Deb P., Dong, Hailiang, Kukkadapu, Ravi K., Ji, Junfeng (2010) Bioavailability of Fe(III) in Loess Sediments: an Important Source of Electron Acceptors. Clays and Clay Minerals, 58 (4) 542-557 doi:10.1346/ccmn.2010.0580409 | Journal (article/letter/editorial) | | samples from China and observed that magnetite and maghemite are major magnetic minerals in loess-paleosol...inferred that only a fraction of the magnetite and maghemite formed by the pedogenic weathering of chlorite...biogenic origin. Chen et al. (2005) further examined maghemite and magnetite in Chinese loess samples and concluded...authors proposed that aggregates of euhedral maghemite nanocrystals were transformed from magnetite magnetosomes...(36º37’N, 107º19’E) (HX) section is situated in the sandy loess transition zone of the Loess Plateau (Figure |  | | Report (issue) | | in ppm on: pyrite, garnet, zircon, monazite, maghemite, ilmenite, lights, and limonite. In addition,...the first run, maghemite. canonical plot of the third run. The addition of maghemite greatly aided...also ore. When using all eighteen variables maghemite and gamma were the most important variables in...using the five best geophysical log variables and maghemite. This plot is shown in figure 8 and displays...with all six of the questionable shales being a sandy shale. The most important variables in distinguishing |  | | Journal (article/letter/editorial) | | mineralization is interbedded with argillaceous to sandy sediments and it can be related to a barrier island...marked mainly by magnetite, hematite, goethite, maghemite, chamosite (bavalite), siderite, apatite and quartz.... . . . . ÷ H ~-~ ~-~, HASSI AOULEOUEL ~ 50 SANDY SHALES, FINE SANDSTONES i .~. . . ........... ...lenses occur in predominantly argillaceous and sandy sediments; the sandstone host rock is chloritic...with a low shell debris content. The overlying sandy foreshore beach sediments contain tabular planar |  | | Book | | France, Greece, Iran, Italy, Jamaica, Rumania, Spain, the USA, the USSR, the Socialist Republic of Vietnam...STRATIGRAPHIC DISTRIBUTION Betic Cordillera of Spain, in the Northeastern Carpathians, in the Crimea...bauxites were formed in Portugal, in Northeastern Spain, in Southern France, on Sardinia. In Hungary, the...area. The karst depressions arefilledwith clayey-sandy sediments ; it is in these sediments that the bauxite...(Maestrichtian); (4) sand, Fuvelian (Upper Campanian); (5) sandy-clay strata, Valdonian (Lower Campanian); (6) bauxite |  | | Journal (article/letter/editorial) | | the case histories of two PRBs: one treats acid mine-drainage (AMD), and the other treats heavy metals... for treatment of the effluents related to acid mine-drainage, addition of pH-raising material, such...NICKEL RIM MINESITE The small underground Nickel Rim mine near Sudbury, Ontario, ceased operations in 1958...drainage forms a plume within a bedrock-confined sandy gravel aquifer, 3 to 8 m thick, that pinches to...polished thin-sections are goethite, hematite, maghemite, and isolated grains of native iron, but all are |  | | Journal (article/letter/editorial) | | argillaceous horizons; the decreased ones, for sandy and sabulous deposits. The lowest values of k are...typical for transgressive phases of the Caspian and sandy deposits refer to regressions [8], we may say that...basin on the whole. In our opinion, the presence of sandy layers and, consequently, low values of κ, in the...draws our attention during the transition from sandy to clay horizons. However, inside the clay horizons...monotonic curves showing the presence of magnetite (maghemite) with the Curie temperature (Tc) somewhat below |  | | Book (edition) | | Hematite a-Fe2O3 29 e-Fe2O3 31 Magnetite Fe3O4 32 Maghemite c-Fe2O3 32 Wçstite Fe1±xO 34 The Fe-Ti oxide system...substitution 51 Other cations 54 Magnetite and maghemite 55 Other iron oxides 57 4 4.1 4.1.1 4.1.2 4.1...schwertmannite 75 Ferrihydrite 78 Hematite 81 Magnetite 87 Maghemite 92 Other Iron Oxides 94 5 5.1 5.2 5.3 5.4 5.4...105 Ferrihydrite 106 Hematite 108 Magnetite 109 Maghemite 109 6 6.1 6.1.1 6.1.2 6.1.3 Electronic, electrical...FeOOH Ferrihydrite 125 Hematite 126 Magnetite and maghemite 128 Other Fe oxides 130 Colour 130 General 130 |  | | Journal (article/letter/editorial) | | intercalation (Ho, 1988). The red soils with maghemite nodules of high magnetic susceptibility are developed...silty clay loam; SiC: silty clay; SCL: sandy loam; SL: sandy loam; L: loam. - : not detected. The research...(Fed Feo )' The soil texture ranges from clay to sandy clay. The magnetic susceptibility of the Penghu...amount of Fed and ferromagnetic minerals such as maghemite and magnetite. The low Fe (II) content (5-14%)...respect to total Fe indicates the predominance of maghemite over magnetite (Wang et at., 1988a). Each pedon |  | Zanelli, R., Egli, M., Mirabella, A., Abdelmoula, M., Plötze, M., Nötzli, M. (2006) 'Black' soils in the southern Alps: clay mineral formation and transformation, X-ray amorphous Al phases and Fe forms. Clays and Clay Minerals, 54 (6) 703-720 doi:10.1346/ccmn.2006.0540606 | Journal (article/letter/editorial) | | while in the subsoil goethite prevailed. Maghemite (or maghemite/hematite mixture) was, furthermore, found...of SOM. Key Words—Clays, Fe-speciation, Fire, Maghemite, Soil Minerals, Weathering. INTRODUCTION Soils... All soils from the investigation areas have a sandy to silty texture. However, there were noticeable...Pura only ~20%. The soil skeleton and the silty-sandy texture generally lead to a high degree of water...We detected, furthermore, the Fe oxide maghemite (or maghemite/ hematite mixture) in the Ah1, Ah2 and |  | Mun, Yulia, Strmić Palinkaš, Sabina, Forwick, Matthias, Junttila, Juho, Pedersen, Kristine Bondo, Sternal, Beata, Neufeld, Kai, Tibljaš, Darko, Kullerud, Kåre (2020) Stability of Cu-Sulfides in Submarine Tailing Disposals: A Case Study from Repparfjorden, Northern Norway. Minerals, 10 (2) 169 doi:10.3390/min10020169 | Journal (article/letter/editorial) | | 13 February 2020 Abstract: Mine tailings that were produced during the exploitation...the mineralogy and geochemistry of the submarine mine tailings and underlying natural marine sediments...Cu concentration is related to the deposition of mine tailings. In contrast, Ni and Cr concentrations...found both in natural marine sediments and in the mine tailings. They are generally well-preserved with...Ulveryggen; Nussir; copper sulfides oxidation; submarine mine tailings Minerals 2020, 10, 169; doi:10.3390/min10020169 |  | Deng, Chenglong, Shaw, John, Liu, Qingsong, Pan, Yongxin, Zhu, Rixiang (2006) Mineral magnetic variation of the Jingbian loess/paleosol sequence in the northern Loess Plateau of China: Implications for Quaternary development of Asian aridification and cooling. Earth and Planetary Science Letters, 241 (1) 248-259 doi:10.1016/j.epsl.2005.10.020 | Journal (article/letter/editorial) | | and multidomain-like magnetite with associated maghemite and hematite. Variations in the ratios of SIRM100mT/SIRM...interpreted as the conversion of ferrimagnetic maghemite to weakly magnetic hematite [35–38]. Liu et al...decrease results from the inversion of fine-grained maghemite to hematite. Such a susceptibility drop is more...paleosols contain more fine-grained pedogenic maghemite grains. Unlike the paleosol samples, however,...indicative of absence of finegrained pedogenic maghemite grains [38]. This almost temperature-independent |  | | Journal (article/letter/editorial) | | oxides and oxyhydroxides (hematite, magnetite, maghemite and goethite) with VMP. He found that these minerals...continental red bed deposits in La Gloria, Teruel basin, Spain (Fig. 1a). This section dates from the Middle to...contains an alternation of red clay, red sands and sandy conglomerates. In Table 1, some geochemical, lithological...GLO065A GLO066A 900 975 1080 1120 dark red clay sandy red clay limestone caliche 5YR4/8 5YR4/4 5YR6/4...GLO059A GLO062A GLO065A GLO066A dark red clay sandy red clay sandstone caliche Original Heated (300³C) |
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Sandy mine, Luesma, Zaragoza, Aragon, Spain