 | | Journal (article/letter/editorial) | | Vol. 68, No. 4:347–360, 2020 TRANSFORMATION OF MAGNESITE TO SEPIOLITE AND STEVENSITE: CHARACTERISTICS AND...Istanbul, Turkey Abstract—Çayırbağı magnesite is one of numerous magnesite deposits occurring throughout Turkey...from magnesite. The sepiolite and stevensite show distinctive compositions and modes of formation compared...analyses and to describe their mechanisms of formation. The geology, mineralogy, and geochemistry were...observations demonstrated that sepiolite was formed from magnesite by transformation via a dissolution–precipitation |  | | Report (issue) | | X-ray Powder Pattern: Sweetwater Co., Wyoming, USA. 12.9 (100), 4.34 (18), 4.51 (7b), 3.63 (7b), 2.55...Jr. Well No. 1, Wyoming, USA; after deduction of dolomite 0.38% and magnesite 0.21% impurities. (2) Na...low-grade oil shale of the Green River Formation (Sweetwater Co., Wyoming, USA). Association: Shortite,...northupite, searlesite (Sweetwater Co., Wyoming, USA); sepiolite, analcime, montmorillonite, dolomite...dolomite (Killik, Turkey). Distribution: In the USA, in core from the John Hay, Jr. Well No. 1 and the Union |  | | Journal (article/letter/editorial) | | Livermore National Laboratory, Livermore, CA 94550, USA Received 16 June 2003; accepted 10 December 2004...mineral formation can sequester a significant fraction of the injected carbon through the formation of calcite...calcite, magnesite and dawsonite. D 2005 Elsevier B.V. All rights reserved. Keywords: Reactive transport...217 (2005) 339–350 The three primary candidate formation/reservoir types suggested for geologic sequestration:...potential for both carbonate and silicate mineral formation with the accompanying impact on porosity/permeability |  | | Journal (article/letter/editorial) | | the Green River formation, is on government land about 20 miles west of the city of Green River, Sweetwater...fiIm. The powder photographs of bradleyite and magnesite were compared to establish the fact that bradleyite...line of the magnesite pattern; hence, the presenceof any substantial proportion of magnesite in bradleyite...powder photographs of (A) bradleyite and (B) magnesite taken with filtered copper K-radiation. CnBurcar...being taken to avoid as much as possible the formation of fines. The crushed material was then sieved |  | | Journal (article/letter/editorial) | | and atmospheric pressure, and the influence of formation conditions on the FTIR spectra is investigated... KEYWORDS:norsethite, BaMg(COa)z, synthesis, formation conditions, phase diagram, carbon isotopes, Fourier...originally described from the sedimentary Green River formation, Wyoming (Mrose et al., 1961). Later on...agreement with its apparently wide range of natural formation conditions, successful synthesis of BaMg(CO3)2...form. In the present study, the influence of formation conditions on the FTIR spectra of synthetic BaMg(CO3)~ |  | | Journal (article/letter/editorial) | | chlorite/smectite in strata of the East Berlin Formation of the Connecticut Valley are largely restricted...principal constituent of shales in the Green River Formation, Dyni (1976) stated that the abundance of...identified in lacustrine strata of the East Berlin Formation (Early Jurassic age). The minerals occur in black...perennial lake-cycle sequences within the East Berlin Formation. The remaining samples (all gray mudstones) were...were discussed by April (1980). The East Berlin Formation is sandwiched between the Holyoke and Hampden |  | | Book | | Sulfur Talc 260 265 274 Vermiculite 145 Magnesite & magnesia Manganese minerals 255 Titanium &...a source of magnesia is eclipsing the mineral magnesite in some areas; the trona mine rather than the...for example, are almost entirely derived from the USA and Tur- key, a situation too narrowly based comfort...Minerals International Congress took place in Boston, USA, in April 1988. 4| a) envi at wererieryre' humus...(4) Serpentinized dolomitic limestone (Arizona, USA; the Transvaal). The Minerals About 95% of world |  | | Journal (article/letter/editorial) | | hydrous sodium magnesium silicate from the Green River formation in Sweetwater County, Wyo., having the formula...between 18 and 20 miles west of the town of Green River, SweetwaterCounty, Wyoming. It was not until...0 . 1 7 : 8 .1 6 0.00 13.68 6.82 0.30x-0.30: magnesite 5 0 .B 0 0.66 185 1. 5 1 0.02 0.00 16.01 8 .1...(leached 6 hrs.) after deduction of dolomite and magnesite. B Loughlinite (leached 58 days), J. J. Fahey... 1951, p. 230). * Calculated as dolomite and magnesite. ** The molecular ratio of MgO is arbitrarily |  | | Book | | . . . . . . . 2. Hydrous Carbonates and the Magnesite Problem a) Hydrous Magnesium Carbonates. . . .... . . . . . . . . . . . . . . . . . . 4. The Formation of Calcite and Aragonite in Organisms 5. The Persistence...Dolomite Formation. 1. General Statement . . . . . . . . 2. Experimental Norsethite Formation. . . 3....4. Conclusions Regarding the Low-Temperature Formation of Dolomite . . . . . . . . . . . . . . . . ....Sediments to Carbonate Rocks . . . . . I. The Formation of Fresh-Water Limestones 192 II. The Evolution |  | | Journal (article/letter/editorial) | | Netherlands 1 TRACE AND MINOR ELEMENTS IN GREEN RIVER OIL SHALE ( C O L O R A D O , U.S.A.), C O N...Meglen, R.R., 1984. Trace and minor elements in Green River oil shale (Colorado, U.S.A.), concentrated by...the oil-rich M a h o g a n y Z o n e of the Green River F o r m a t i o n . S u b s e q u e n t m i n...were discarded. 1.1. Mineralogy The G r e e n River oil shales are stratified m a r l s t o n e s o...Pyrite Analcime (wt.%) 6 1 1 100 elements in Green River oil shales is a report by Desborough et al. (1976); |  | | Journal (article/letter/editorial) | | 47, JULY_AUGUST' 1962 O}' STEVENSITEIN THE GREEN RIVER OCCURRENCE FORMATIONOF WYOMING1 W. H. Bnaorrv...authigenic minerals found in the Eocene Green River Formation already make an imposing list. In the interest...examined or analyzed in this member of the Green River Formation, we assumedthey were both present in this...been learnedabout the history of the GreenRiver Formation it can be inferred that the clay formed in, or...part of the Wilkins Peak Member of the Green River Formation in sec.31, T. 19 N.' R. 105 W., Sweetwater |  | García-Veigas, Javier, Gündoğan, İbrahim, Helvacı, Cahit, Prats, Eva (2013) A genetic model for Na-carbonate mineral precipitation in the Miocene Beypazarı trona deposit, Ankara province, Turkey. Sedimentary Geology, 294. 315-327 doi:10.1016/j.sedgeo.2013.06.011 | Journal (article/letter/editorial) | | and Ca2+ are almost exhausted during calcite, magnesite, and dolomite precipitation, Na-carbonate rich...maturation of microbial organic matter and also in formation of evaporite minerals (Renaut and Tiercelin, 1994;...al., 2005). The Eocene Green River Formation (Wyoming, Colorado and Utah, USA) is the largest and best...preserved Na-carbonate deposit. This giant lacustrine formation occurs in several sedimentary basins with large...Based on primary nahcolite textures in the Green River Formation, Piceance Creek Basin (Colorado), and assuming |  | | Journal (article/letter/editorial) | | from the observation of loughlinite in the Green River Formation of Wyoming. Fahey et al. [40] described...material from shrub facies in the Barra Velha Formation, which has been taken as evidence to suggest significant...Al concentrations; and salinity on Mg-silicate formation. We briefly summarize their results here, with...deposits. Importantly, the circa 2.7 Ga Rietgat Formation (South Africa), hypothesized to have been deposited...deposits (e.g., [45]), although the presence of magnesite and dolomite (which are not known to precipitate |  | Horgan, Briony H.N., Anderson, Ryan B., Dromart, Gilles, Amador, Elena S., Rice, Melissa S. (2020) The mineral diversity of Jezero crater: Evidence for possible lacustrine carbonates on Mars. Icarus, 339. 113526pp. doi:10.1016/j.icarus.2019.113526 | Journal (article/letter/editorial) | | Astrogeology Center, Flagstaff, Ariz., USA -p 2 ro USA Division of Geological & Planetary Sciences...Washington University, Bellingham, Wash., USA Jo ur na 5 lP Calif., USA Submitted to Icarus *Corresponding...near-shore environment, they are conducive to the formation Jo and preservation of biological macrostructures...constrained. Proposed mechanisms for carbonate formation include hydrothermal systems, low-grade crustal...carbonate units features Red Channel R2529 BD1300 Green Channel R1506 BDI1000IR Phyllosilicates Mafic |  | | Journal (article/letter/editorial) | | fluid, and (2) through mineral trapping, i.e. formation of stable carbonated minerals (Bachu et al., 1994;...performed to investigate the precipitation of magnesite (MgCO3), from MgCl2 solution, on various substrates...substrates, under hydrothermal conditions. Magnesite does not precipitate commonly in nature. However, we...control experiments, designed to precipitate magnesite from Mg-rich brine (Table 3). Various types of...substrate were used to investigate their effect on magnesite precipitation. These included finely ground quartz |  | | Journal (article/letter/editorial) | | Grosso, Brazil. Specifically, two carbonates [magnesite and eitelite Na2Mg(CO3)2], two phosphates [mixedanion...indicates variability in the source media during the formation of diamond. Volatiles, represented in the form...and crystallized as polymineralic inclusions. Formation of diamond in the studied case took place in a...volatiles and acted as an open system during diamond formation. Keywords: diamond, inclusions, lower mantle,...Deep Mantle, carbonatite, volatiles, carbonates, magnesite, breunnerite, eitelite, halides, phosphates, Na4Mg3(PO4)2(P2O7) |  | | Journal (article/letter/editorial) | | fine-grained, light green tourmaline crystals spectacularly supports pre-deformation formation. The crystals...Jungle, Sullivan, Broken Hill, Chibuluma, Plenty River and Golden Dyke Dome deposits and volcanic hosted...Geosyncline (Fig. 3) - the Namoona Group (Beestons Formation and Celia Dolomite) and the unconformably overlying...two units of the Mount Partridge Group (Crater Formation and Coomalie Dolomite) (Ewers et al. 1984). These...tourmaline-rich layers. The Beestons Formation and the Crater Formation are essentially the same lithologically |  | | Journal (article/letter/editorial) | | Ridge National Laboratory, Oak Ridge, TN 37831-6110, USA c Department of Earth and Planetary Sciences, University...University of Tennessee, Knoxville, TN 37996, USA Received 28 November 2006; accepted in revised form 25...deep sedimentary formations will lead to the formation of various carbonate minerals, including the common...phases calcite (CaCO3), dolomite (CaMg(CO3)2), magnesite (MgCO3), siderite (FeCO3), as well as the far...Gibbs energy of formation (Df Go298:15 ¼ 1782 2 kJ mol1 Þ, enthalpy of formation (Df H o298:15 ¼ |  | | Journal (article/letter/editorial) | | clay minerals, dolomite, calcite and, locally, magnesite minerals, gypsum, feldspar, illite, quartz and...of analcime in the middle level of the Akpınar Formation, but emphasized that the pyroclastic rocks are...solution. However, the mineralogical properties and formation mechanisms were not discussed and compared to...1977). The Hırka formation is composed of altered tuffaceous material intercalated with green ~50 cm thick...nodules (3–10 cm in size), and the Karadoruk Formation is generally represented by a ~1– 2 m thick silicified |  | | Journal (article/letter/editorial) | | simple.Three phases,witherite, norsethite,and magnesite, are stable, and there is no solid solubility...calcite; Cd = disordered calcite; Do : dolomite; M magnesite;N - norsethite; W = witherite. calcite and dolomite...C - calcite solid solution; Do dolomite; M = magnesite;N - norsethite;W - witherite. W. R, BRICE AND...solution; C Do - dolomite-type solid solution; M = magnesite. Subsolidusphaserelationsin the systemat 650oC...solution; Do : dolomitetype solid solution; M - magnesite. Norsethite at the Rosh Pinah deposit (Steyn |  | | Journal (article/letter/editorial) | | deposit of McArthur River, Australia. Such brines are known from the Green River Formation and deposits formed...afterward, BILLINGSel ul. (1969) showed that formation waters collected from Devonian carbonates in Northern...sediment traps. Thus the critical conditions for the formation of oil shales are realized prior to evaporite...deposition. Our experience with the Eocene Green River formation of Wyoming (Eugster and Hardie. 1975, 1978)...(RYDER eral., 1976) and the Laney Member of the Green River basin (BUCHHEIM and SURDAM, I98 1). the lake |  | | Journal (article/letter/editorial) | | University of Texas at Austin, Austin, TX 78712, USA Department of Earth and Environmental Sciences, University...2534 C.C. Little Building, Ann Arbor, MI 48109, USA a r t i c l e i n f o Article history: Received...chemical compositions obtained using electron probe, formation temperatures and pressures of chromite and its...Austin, 2275 Speedway Stop C9000, Austin, TX 78712, USA. E-mail address: dzhao@utexas.edu (D. Zhao). 1 Deceased...pressure although in general pressure of chromite formation can only be constrained by certain mineral assemblages |  | | Journal (article/letter/editorial) | | follows: Dried reagent-grade K2C03 and natural magnesite rhombs from Brazil assource of MgC03 were mixed...Zemann, J.: Crystal structure refinements of magnesite, calcite, rhodochrosite, siderite, smithsonite...with leucosphenite, and crocidplite in the Green River formation, Utah. Am. Mineral. 40, 326- 327 (1955) |  | | Journal (article/letter/editorial) | | follows: Dried reagent-grade K2C03 and natural magnesite rhombs from Brazil assource of MgC03 were mixed...Zemann, J.: Crystal structure refinements of magnesite, calcite, rhodochrosite, siderite, smithsonite...with leucosphenite, and crocidplite in the Green River formation, Utah. Am. Mineral. 40, 326- 327 (1955) |  | Pietzsch, Raphael, Tedeschi, Leonardo R., Oliveira, Daniel M., dos Anjos, Camila Wense Dias, Vazquez, Joselito C., Figueiredo, Milene F. (2020) Environmental conditions of deposition of the Lower Cretaceous lacustrine carbonates of the Barra Velha Formation, Santos Basin (Brazil), based on stable carbon and oxygen isotopes: A continental record of pCO2 during the onset of the Oceanic Anoxic Event 1a (OAE 1a) interval?. Chemical Geology, 535. 119457 doi:10.1016/j.chemgeo.2019.119457 | Journal (article/letter/editorial) | | Cretaceous lacustrine carbonates of the Barra Velha Formation, Santos Basin (Brazil), based on stable carbon...Cretaceous lacustrine carbonates of the Barra Velha Formation, Santos Basin (Brazil), based on stable carbon...Cretaceous lacustrine carbonates of the Barra Velha Formation, Santos Basin (Brazil), based on stable carbon...genesis of the carbonates of the Barra Velha re Formation. Finally, this apparent equilibrium with the atmosphere...particularly associated with the Barra Velha Formation, allowed several studies aimed primarily at understanding |
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