 | Chukanov, N. V., Pekov, I. V., Levitskaya, L. A., Zadov, A. E. (2009) Droninoite, Ni3Fe3+Cl(OH)8 · 2H2O, a new hydrotalcite-group mineral species from the weathered Dronino meteorite. Geology of Ore Deposits, 51 (8) 767-773 doi:10.1134/s1075701509080091 | Journal (article/letter/editorial) | | (which fell near the village of Dronino, Kasimov district, Ryazan oblast, Russia) as dark green to brown...taenite, violarite, troilite, chromite, goethite, lepidocrocite, nickelbischofite, and amorphous Fe3+ hydroxides...the vicinity of the village of Dronino, Kasimov district, Ryazan oblast, Russia, turned out very promising...crystalline goethite, hematite, akaganeite, lepidocrocite, and amorphous Fe3+ oxides and hydroxides. Partially...compact and contains pockets of orange-brown lepidocrocite, brown veinlets of the insufficiently studied |  | | Journal (issue) | | Twenty-three, Number Three ® Articles Gold in South Africa ..............................................and this must have introduced him to many other local mineral collectors and possibilities for further...of this typically natrolite covered material for local dealers as well as himself. He used much of this...lent a distinction to his stock of minerals that local dealers found hard to match. During his time with...later years he just purchased from the miners and local dealers. He did not like to be hurried, and drove | | | Journal (issue) | | Mowry Place Tucson, AZ 85741 Articles Gold in South Africa ..............................................and this must have introduced him to many other local mineral collectors and pos sibilities for further...of this typically natrolite covered material for local dealers as well as himself. He used much of this...lent a distinction to his stock of minerals that local dealers found hard to match. During his time with...later years he just purchased from the miners and local dealers. He did not like to be hurried, and drove |  | Cavalazzi, Barbara, Westall, Frances, Cady, Sherry L., Barbieri, Roberto, Foucher, Frédéric (2011) Potential Fossil Endoliths in Vesicular Pillow Basalt, Coral Patch Seamount, Eastern North Atlantic Ocean. Astrobiology, 11 (7) 619-632 doi:10.1089/ast.2011.0657 | Journal (article/letter/editorial) | | K-phillipsite tubules surrounded by an Fe-oxyhydroxide (lepidocrocite) rich membranous structure, whereas the spherical...Geology, University of Johannesburg, Johannesburg, South Africa. Centre de Biophysique Moléculaire–CNRS, Orléans...Department of Geology, University of Johannesburg (South Africa); at the Centre de Biophysique Moléculaire...filamentous structures consists of Fe oxyhydroxide, lepidocrocite that is enriched in carbonaceous matter (Fig...shown in the multiphase spectra 2 is made of lepidocrocite (lep) associated with phillipsite (phi) and |  | | Journal (article/letter/editorial) | | pyrite, native gold, psilomelane, goethite and lepidocrocite associated with argillisation, sericitization...are sericitized. Argillization, opacitization and local sericitization are dominant in the groundmass. Sericitization...heavy mineral phases Gedikler Goethite and lepidocrocite are developed around relict biotite crystals... 9c). Psilomelane exists with goethite and lepidocrocite in cracks (Figs. 9d-f). Secondary sticky psilomelane...partially to completely replaced by goethite and lepidocrocite. Rutile occurs in biotite and the groundmass |  | | Journal (article/letter/editorial) | | subdivision, Swaziland supergroup, Barberton greenstone belt, South Africa (Walsh and Lowe 1985, Walsh 1992)...meteorite. 4.4 Raman imaging of meteorite Northwest Africa 2999 NWA2999 is an angrite meteorite found in Morocco...We also found a new crystalline FeOOH phase, lepidocrocite, coexisting with the mixture of goethite and...graphitic carbon of biogenic parentage in an ancient South African chert, Abstract #1423, 32nd LPSC. Wang,...early Archean Onverwacht group, Barberton mountain land, South Africa, Precambian Research, 54, 271-293 |  | | Journal (article/letter/editorial) | | gradients witin the reaction rim may develop due to local equilibrium constraints. If vicsouse creep takes...Ga Hooggenoeg Formation of the Barberton greenstone belt, South Africa. The studied pillow lava flow shows...the ion probe G30Si values obtained on coeval Barberton and Pilbara chert series2. These preliminary results...the crystalline Fe oxides are goethite and lepidocrocite. Raman spectroscopy of individual Fe-rich areas...K edge EXAFS spectra of synthetic goethite, lepidocrocite, and ferrihydrite with different Sb surface |  | | Journal (article/letter/editorial) | | the oxides, ferric trihydroxide, goethite/lepidocrocite, and hematite form instead of magnetite; and...Ga old Buck Reef Chert of the Barberton Greenstone Belt, South Africa in the section on "Experimental...to the ferric oxide hydroxides goethite and lepidocrocite and the ferric oxide hematite, and amorphous...amorphous and crystalline ferric silicates such lepidocrocite and the ferric oxide hematite, and amorphous and...produced and the primary minerals goethite, lepidocrocite, hematite, quartz, amorphous silica, and siderite |  | | Journal (article/letter/editorial) | | environment in which the goethite crystallized. Local carbon cycling associated with this change in diagenetic...accessory hematite (a-Fe2O3) and some minor lepidocrocite (c-FeOOH). No other minerals are detectable...G = goethite peaks. H = hematite peaks. L = lepidocrocite peaks. Goethite is the dominant mineral in the...mineral (with accessory hematite and minor lepidocrocite). Consequently, aliquots of pure hematite are...some accessory hematite and minor lepidocrocite in Ax-2. Lepidocrocite (c-FeOOH) would have no effect on |  | | Journal (article/letter/editorial) | | Yapp, 2005c). Minor amounts of XRD-detectable lepidocrocite (cFeOOH) and hematite are present in Ax-2, but...breaks down at these temperatures when the confining, local goethite structure breaks down (Yapp and Poths,... 14.5 22.5 17.6 aapp hm = hematite; lp = lepidocrocite; qtz = quartz; phy = 10 Å accessory mineral...possibility that heterogeneous catalysis, involving the local mineral surface, facilitates oxygen isotope exchange...XRD-detectable lepidocrocite (c-FeOOH), but the oxygen isotope characteristics of lepidocrocite are not expected |  | | Journal (article/letter/editorial) | | filaments surrounded by radiating crystals of lepidocrocite. (E) Oblique section showing filaments containing...oxyhydroxides surrounded by long, blade-like lepidocrocite. (F) Model of stalk formation and mineralization...are identified as two-line ferrihydrite and lepidocrocite (FeOOH), respectively (Fig. 4C–E). Based on...minerals (including ferrihydrite, goethite, lepidocrocite, green rust, magnetite and iron phosphates)...negatively charged surfaces which bind calcium. Once the local concentration of calcium and carbonate ions has |  | | Journal (article/letter/editorial) | | conditions (Cornell and Schwertmann, 2003), lepidocrocite (c-FeOOH), akaganeite (b-FeOOH), ferrihydrite...O2, see text. c G, goethite; H, hematite; L, lepidocrocite; ‘‘m” denotes minor phase in the sample. d After...and 4), hematite is found in 4 samples and lepidocrocite is found in 2 samples in minor amounts (Table...hydrogen in its structure, and the influence of lepidocrocite on the D/H exchange experiments is expected...detected under XRD. G, goethite; H, hematite; L, lepidocrocite, mineral composition of each sample is listed |  | | Journal (article/letter/editorial) | | “l” refer to minor amounts of hematite and lepidocrocite, respectively. See Feng and Yapp (2008) for...mass balance. Moreover, the minor amounts of lepidocrocite in SFO-4-15 (Table 1) 11.6 group 4: 11.4 ...should not affect the oxygen yields, because lepidocrocite has the same nominal stoichiometry as goethite...ironstone pods within Archean Barberton greenstone belt, South Africa. Geochim. Cosmochim. Acta 70, 1457–1470...Cretaceous-Mid-Tertiary African land surface, Ryedale, South Africa. Econ. Geol. 95, 203–220. Poage M. A., Sjostrom |  | Mills, S. J., Christy, A. G., Génin, J.-M. R., Kameda, T., Colombo, F. (2012) Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76 (5) 1289-1336 doi:10.1180/minmag.2012.076.5.10 | Journal (article/letter/editorial) | | favoured electrostatically. It seems likely that local ordering of M2+ and M3+ occurs to prevent the formation...layers are offset in a disordered fashion, the local ordering may not be reflected in the unit cell determined...in specimens from Dundas and from Barberton, Transvaal, South Africa was named barbertonite by Frondel...from the Kaapsehoop asbestos mine, Barberton district, South Africa and stichtite from Stichtite Hill...re-investigated iowaite from the Palabora open pit mine, South Africa, and concluded that the correct formula was |  | | Journal (article/letter/editorial) | | element 71(4): 1021 Villarrica 71(4): 1021 apatite Barberton Greenstone Belt 71(1): 165 Kaapvaal craton 71(1):...seawater 71(12): 2960 iron solubility 71(23): 5605 lepidocrocite 71(24): 5913 MO/DFT 71(24): 5913 Mössbauer...shales 71(10): 2417 marine sediments 71(10): 2417 South Africa 71(10): 2417 Transvaal supergroup 71(10): 2417...shales 71(10): 2417 marine sediments 71(10): 2417 South Africa 71(10): 2417 Transvaal supergroup 71(10): 2417...Gibbs function 71(1): 36 ideal gas 71(1): 36 lepidocrocite 71(3): 615 linear free energy relationships |  | Shannon, Ruth C., Lafuente, Barbara, Shannon, Robert D., Downs, Robert T., Fischer, Reinhard X. (2017) Refractive indices of minerals and synthetic compounds. American Mineralogist, 102 (9) 1906-1914 doi:10.2138/am-2017-6144 | Journal (article/letter/editorial) | | RI = 1.803 for knorringite from Basutoland, South Africa, with the composition Mg1.90Ca0.66Fe0.41Mn0...baddeleyite Phaloaborwa, 2.136 Ca0.02Ti0.02O2 South Africa Zr0.671Y0.329O1.835 Synthetic 2.0691 Zr0.869Y0...Canada WO3∙0.5H2O hydroElsmore, 2.24 kenoelsNew South moreite Wales, Australia CaZr0.91Ti0.06 painite...1.8159 Hf0.03BAl9O18 Township, Pyin-Oo-Lwin district, Mandalay division, Myanmar ny nz calc...Posnjak and Merwin (1919) Michigan Fe3+O(OH) lepidocrocite Easton, 1.938 2.2 2.515 2.2177 2.169 2.2 37 |  | | Book (edition) | | OF OF SOUTH AFRICA MINES GEOLOGICAL SURVEY MINERAL RESOURCES OF REPUBLIC OF THE SOUTH AFRICA...Second World War, and partly as a result of it, South Africa experienced vast industrial expansion. This...official ‘handbook on the mineral resources of South Africa, it has become necessary to revise, or rather...great diversity and magnitude of South African mineral deposits and local mining operations, the Economic...Chamber of Mines of South Africa with Mr G. H. Grange as co-ordinator, and the South, African mining industry; |  | | Journal (article/letter/editorial) | | 1999). As well, ~1.9 Ga BIF in the Black Hills, South Dakota, ~700 Ma Rapitan BIF associated with breakup...in the Murchison Domain. The Lady Alma complex, south of Meekatharra, belongs to the ~ 2810 Ma 509 Meeline...komatiites and basalts from ~ 4 in the 3.4 Ga Barberton greenstone belt, through 3.4–3.0 for the 2.7 Ga...convergent margin basalts such as at Gough Island, South Atlantic, attributed to inheritance of negative...(Na4Mn14O27.21H2O), vernadite (δ-MnO2), goethite and lepidocrocite (Graham and Wright, 2007). Positive Ce-anomalies |  | | Journal (article/letter/editorial) | | the Paleoproterozoic Krishna Province rocks [2] south of the Godavari graben [3]. The Vinjamuru domain...rocks and eclogites from the Maksyutovo complex (South Urals, Russia) First results from the Northeast...HNATYSHIN1, S. PARADIS3, 1 AND R.A.CREASER 1 2 Local-Electrode Atom Probe (LEAP) tomography can identify...~1500 Ma. Such ages indicate provenance from the local Mertz Shear Zone. We will discuss details of our...climate and air quality. In this work we evaluate the local and regional benefits of a portfolio of 16 climate-friendly |  | | Journal (article/letter/editorial) | | J. WRENSEN and L. THORLING: Stim~ation by lepidocrocite (y-FeOOH) of F~II~de~ndent on the Yilgam Block...4oAr/39Arage spectra from early Archean (-3.5 Ga) Barberton greenstone belt sediments: A technique for detecting...Jagersfontein and Koffiefontein kimberlite, South Africa 2615 C. J. YAPP: Oxygen isotopes in an oolitic...of sulfur in granitoids during intrusion of the South Mountain Batholith,NovaScotia,Canada . . . . . ...55( 12):3777 sedimentary rocks, Barberton greenstone belt, South Africa, 55(7): 1933 Arizona Meteor Crater |  | | Journal (article/letter/editorial) | | J. WRENSEN and L. THORLING: Stimulation by lepidocrocite (y-FeOOH) of Fe(U)-dependent on the Yilgam...step-heating 40Ar/39Arage spectra from early Archean Ga) Barberton greenstone belt sediments: A technique for detecting...Jagersfontein and Koffiefontein kimberlite, South Africa 2615 C. J. YAPP: Oxygen isotopes in an oolitic...of sulfur in granitoids during intrusion of the South Mountain 3809 Batholith, Nova Scotia, Canada...55( 12):3777 sedimentary rocks, Barberton greenstone belt, South Africa, 55(7): 1933 Arizona Meteor Crater |  | Frierdich, Andrew J., Beard, Brian L., Rosso, Kevin M., Scherer, Michelle M., Spicuzza, Michael J., Valley, John W., Johnson, Clark M. (2015) Low temperature, non-stoichiometric oxygen-isotope exchange coupled to Fe(II)–goethite interactions. Geochimica et Cosmochimica Acta, 160. 38-54 doi:10.1016/j.gca.2015.03.029 | Journal (article/letter/editorial) | | ferrihydrite results in a rapid transformation to lepidocrocite and goethite, which is followed by a gradual...morphological changes consistent with those of lepidocrocite and goethite (SI Fig. S2). In contrast to the...presence of Fe(II), ferrihydrite transforms to lepidocrocite followed by goethite (See SI Figure S1,S2)....and y distinguish oxygen ligand species due to local coordination to other Fe2+/3+ and/or H+ ions. In...to which they are bonded because the associated local charge redistribution is shared across bridging |  | | Report (chapter) | | microbands might reflect some relationship to a local and episodic biological source of oxygen. If oxidation...origin of Palaeoproterozoic manganese deposits in South Africa, India and Gabon (Biihn et al. 1992; Roy 1992;...Kuruman iron-formations, Transvaal Supergroup, South Africa. Precambrian Research, 78. & MrLLER, P. 1993...iron-formations from the Transvaal Supergroup, South Africa: Evidence from neodymium isotopes. Journal of... 1973. Precambrian iron-formations of Southern Africa. Economic Geology, 68, 9601004. - - 1 9 8 3 . Palaeoenvironmental |  | | Journal (volume) | | Early Proterozoic Witwatersrand Supergroup, South Africa. T. O. Reimer. . ... . . .... . . . . . . ....Precambrian volcanogenic-sedimentary lithogenesis in the south-eastern part of the Baltic Shield . V. A. Sokolov...Early Proterozoic sediments (3.0- 1.7 Ga) in South Africa, Australia and the U .S.A. may be seen as a...fractionated crust than existed prior to 3.0 Ga in South Africa and northwest Australia, while heavy mineral...thering, deposition, diagenesis, Proterozoie, South Africa, Australia, United States Kenneth A. Eriksson |  | Hazen, R. M., Papineau, D., Bleeker, W., Downs, R. T., Ferry, J. M., McCoy, T. J., Sverjensky, D. A., Yang, H. (2008) Mineral evolution. American Mineralogist, 93 (11) 1693-1720 doi:10.2138/am.2008.2955 | Journal (article/letter/editorial) | | EvOLUTION 3200 ±3230 Fig Tree & Moodies Groups, Barberton greenstone belt ±3460 3465 ±3500 ±3530 3600 ...deposits (ca. 3490 Ma, Pilbara & Barberton) Onverwacht Group, Barberton greenstone belt Oldest microfossils...3.25 Ga Fig Tree Group of the Barberton Greenstone Belt in South Africa. The mineralogy of BIFs can be...(FeS2), siderite (FeCO3), and uraninite (UO2) in the South African Witwatersrand and Canadian Blind River Archean...known barite deposits (3.5 to 3.4 Ga) are from South Africa, Western Australia, and India (Strauss 2003; |
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