 | | Journal (article/letter/editorial) | | formations (USh) and deposits of the Prii mandra iron district (BSh), carbonaceous schists of the Krivoi Rog...replacement fronts: “sideroplesite magnetite”, “sideroplesite Fe chlorite”, “sideroplesite Al chlorite” (Novokrivorozhskoe...mineral forms (quartz, mag netite, and less common hematite and siderite), in which the properties of one...ironsiliceous formations (essentially monomineral sideroplesite–siderite beds up to 5– 7 cm thick) with the...composition of carbonates: the REE content in the sideroplesite–siderite beds of the iron– siliceous formation |  | Morgan, Rachael, Orberger, Beate, Rosière, Carlos A., Wirth, Richard, Carvalho, Camila da Mota, Bellver-Baca, M. Teresa (2013) The origin of coexisting carbonates in banded iron formations: A micro-mineralogical study of the 2.4Ga Itabira Group, Brazil. Precambrian Research, 224. 491-511 doi:10.1016/j.precamres.2012.10.013 | Journal (article/letter/editorial) | | co-existing calcite, dolomite, ankerite and sideroplesite in the 2.4 Ga Itabira Group, Brazil. The Itabira...and dolomite with inclusions of nano- and micro-hematite. Nanometric Si-bearing ferrihydrite clusters are...of the Itabira Group include early diagenetic hematite nodules intergrown with dolomite. Silica in the...stability up to 500 ◦ C, and the nano- and micro-hematite included in dolomite and quartz were partially...facilitating the precipitation of ankerite, sideroplesite and magnetite/sulphides from a reducing diagenetic |  | | Journal (article/letter/editorial) | | pohwatp@si.edu Siderite Siete Suyos Mine, Atocha-Quechisla District Sud Chichas Province, Potosí Department...1. Gemmy siderite from Siete Suyos mine, Atocha-Quechisla district, Sud Chichas Province, Potosí Department...minerals known to pseudomorph siderite include hematite, magnetite, quartz, cacoxenite, calcite, barite...minerals of siderite include sphalerite, galena, hematite, calcite, ankerite, dolomite, fluorapatite, pyrite...& MINERALS Figure 2. Siderite with quartz, from Mine Hill, Roxbury, Litchfield County, Connecticut. The |  | | Journal (article/letter/editorial) | | PART OF THE NORTHERN BLACK HILLS AND THE HOMESTAKE MINE, LEAD, SOUTH DAKOTA BY JAMES A. NOBLE AND JAMES...the metamorphic zones in those rocks in the Lead district 941 2. Photomicrographs of typical sections of...of metamorphic rocks from the Lead district 974 3. Photomicrographs of special features in the metamorphic...metamorphic rocks of the Lead district 975 941 942 NOBLE AND HARDER—STRATIGRAPHY AND METAMORPHISM, SOUTH...granitic intrusion somewhere northeast of the district, has developed metamorphic zones of the Scottish |  | | Journal (article/letter/editorial) | | amorphous and crystalline (hydrated goethite, hematite, and vivianite). Similar data were reported by...pelitic, or other materials. In particular, sideroplesite–siderite beds from the iron for mations of...similar to the aforementioned Bi content in sideroplesite beds from the iron formations of the Krivoi...structural zone, from the Ingulets Mine in the south to the Zheltye Vody Mine in the north, and a crosssection...from the sixth horizon of the section of Frunze Mine and a particular sample from the aforementioned |  | | Journal (article/letter/editorial) | | rock- and ore-forming solutions. Magnetite and hematite of primary sedimentary or diagenetic origin have...pseudomorphs after hematite) in high-grade ore, this mineral was formed as a product of hematite reduction by...842 846 809 809 294 320 208 180 235 22 Gubkin Mine 23 4021 920 24 25 7548 7551 317 261 26 3077...Cummingtonite–magnetite jaspilite Pankovo area ″ Hematite–magnetite jaspilite ″ ″ Stoilo deposit ″ Specularite–magnetite..., os, bl1 ″ os, bl3 os, bl3 Vislovka deposit Hematite–magnetite jaspilite Magnetite jaspilite ″ Car |  | | Journal (article/letter/editorial) | | low-temperature greenstone metamorphism (K. Liebknecht mine). Figure 2 shows the geological structure in the... (gray-banded) lean ores, 7) quartz-magnetite-hematite (red-banded) rich ores; 8) dispersohematite-martite...contents of carbonate minerals (siderite and sideroplesite) increase from north to south in the structure...chloritebiotite-sideroplesite-quartz-magnetite (gray banded), quartz-magnetite, and quartz-hematite-magnetite...stilpnomelane-riebeckite, magnetite-hematite, biotite, sideroplesite, and cummingtonite. The central bed |  | | Journal (article/letter/editorial) | | Ni)9S8, violarite FeNi2S4, and millerite NiS], hematite, and metallic Ni-iron were detected; the two phosphates...(Ba,Sr)AlF5, pentlandite, violarite, millerite, hematite, metallic Ni-iron, TEM, Juina, Brazil Introduction...(Fe,Ni)9S8, violarite FeNi2S4, millerite NiS, hematite Fe2O3, and metallic Ni-iron. Two phosphates and...400 30–70 10–70 ~500 nm-sized oskarssonite AlF3 hematite Fe2O3 ilmenorutile (Ti,Nb,Fe)O2 or Fe(Ti,Nb)O4...Fe-magnesite (Mg,Fe)(CO3) (breunnerite and sideroplesite) metallic Ni-iron bubble enriched with Cl and |  | | Journal (article/letter/editorial) | | conglomerates. The main component of sideritic rocks is sideroplesite. Berthierine, pistomesite, calcite, and ankerite...differences in the chemical composition of sideroplesite depending on the environment it crystallized...of the carbon isotope determinations in the sideroplesite and the environmental conditions of its crystallization...case of the average values of δ18 O in the sideroplesite. Published: 30 November 2021 Keywords: sideritic...or almost exclusively by finely crystalline sideroplesite and siderite. Moreover, two samples containing |  | | Book | | mineral particles (eg inclusions of chlorite and hematite in jasper). Allochromatic minerals display other...unaltered crystals of the same mineral. For instance, hematite (hardness 6) will have a lower hardness in the...named from the colour of their streak, such as hematite - blood, crocoite - saffron and xanthocone - yellow...mineral magnetite; to a lesser extent by pyrrhotite, hematite and wolframite. A large number of minerals are...Caucasus - crystals up to 1.5 cm (USSR), Getchell Mine - Nevada (USA) •Application: ore (extraction of |  | | Journal (article/letter/editorial) | | plexes. The orebodies consist of magnetite and hematite-magnetite varieties, and the latter, with their...quartz ites. The principal minerals in the ores are hematite, diopside, calcite, siderite, sulfides (pyrite...The principal minerals are quartz, magnetite, sideroplesite, and grunerite, and the minor components are...minerals is taken over by carbonates (ankerite and sideroplesite), in places reaching 20%, but they are usually...usually minor components, as are chlorite, aegirine, hematite, pyrite, and pyrrhotite. Among the trace-elements | | | Book | | illustrated Encyclopedi of the World’s Rocks and Mine re L A R E N MI OF THE WORLD Rudolf Duda and...mineral particles (eg inclusions of chlorite and hematite in jasper). Allochromatic minerals display other...unaltered crystals of the same mineral. For instance, hematite (hardness 6) will have a lower hardness in the...named from the colour of their streak, such as hematite — blood, crocoite — saffron and xanthocone — yellow...mineral magnetite; to a lesser extent by pyrrhotite, hematite and wolframite. A large number of minerals are |  | Ripp, G. S., Khodyreva, E. V., Izbrodin, I. A., Rampilov, M. O., Lastochkin, E. I., Posokhov, V. F. (2017) Genetic nature of apatite–magnetite ore in North Gurvunur deposit, western Transbaikal region. Geology of Ore Deposits, 59 (5) 407-420 doi:10.1134/s1075701517050051 | Journal (article/letter/editorial) | | deposit, which was discovered in the Eravna ore district. The ore is composed of apatite–magnetite paragenesis...of ore. The δ18O of fluid in equilibrium with hematite is 8.0–8.5‰ and shows a certain enrichment in...fluids at the postore stage in equilibrium with hematite and carbonates was estimated in accordance with...Gurvunur deposit is located in the Eravna ore district of the Uda–Vitim island-arc system. The deposit...sulfur. Massive ore consists of magnetite and hematite– magnetite aggregates. The main mass of magnetite |  | | Report (issue) | | come from Precambrian ore bodies in the Homestake mine at Lead in the northern Black Hills. Most of the...the iron-formation changes from a carbonate (sideroplesite) to a silicate (cummingtonite). This metamorphic...it would probably have been because a small gold mine in conglomerate at the base of the Deadwood accidentally...With the exception of the Homestake mine and the Bald Mountain mine, which is in the Deadwood Formation...of their supporters have been important. Only one mine-the Homestake-has been large by modem standards; |  | | Report (chapter) | | cyclicity (Kulik 1991)• The fact that 'oxide facies' hematite and magnetite submembers thin-out first with a...siderite- or hematite-rich bands. Even in the extreme BIF oxide facies (magnetite-hematite jaspilites)...complete (unweathered) profile, a microbanded hematite-magnetite BIF (jaspilite) sub-member always occurs...thickness of the f-member decreases, it is the hematite-magnetite lithofacies that always thins out first...sub-millimetre scale defined by clouds of micron-size hematite grains is present in thick (2-7mm) quartz-rich |  | | Journal (article/letter/editorial) | | Soc. London, 23, 3. Beraunite recorded from Roury mine, Glandore, Co. Cork (A. Russell 1923, Mineral. Mag...H. Church 1865, J. Chem. Soc. 18, 213. Botallack Mine, Cornwall. [A distinct mineral, but requires further...McLintock 1910, Mineral. Mag. 15, 413. Lizard district, Cornwall. [Botryolite = var. of Datolite (Hey...1908, Mineral. Ma 9. 15, 285. Hingston Down Consols Mine, Calstock, Cornwall. Cathkinite (Glen and Young...Russell 19tl, Nature, 86, 180. Benallt manganese mine, Caernarvonshire. See also, L. J. Spencer 1942, |  | | Journal (article/letter/editorial) | | FeCO3, its Mn and Mg varieties (oligonite and sideroplesite), and ankerite Ca(Mg, Fe+2, Mn)(CO3)2. In sedimentary...formation of amorphous goethite, hydrogoethite, hematite, and other iron hydroxides. With changing temperature...L.V. Anfimov, and M.T. Krupenin. In the Bakal district, the deformed and eroded Archean rocks of the...terrigenous rocks and basic volcanics. The Bakal district is localized in the Bashkir Anticlinorium, a zone...direction (Kamaletdinov, 1986). The deposits of this district are located in the Upper Bakal Synclinorium, a |  | | Journal (article/letter/editorial) | | Lithoclasts are partly replaced by carbonates and hematite, being argilitized and chloritized. Micas—muscovite...altered into phosphates or replaced by carbonates, hematite and pyrite. Zircon, apatite and rutile are accessory...minerals from the sideritemagnesite group (sideroplesite) (Figures 2A–H and 3D) are the main carbonatic...primarily being in places overgrown by celestite. Hematite and pyrite are present. Many sandstones are cut...oriented structures (underlined by mica flakes, hematite and organic matter). The detrital material, sub-rounded |  | | Journal (article/letter/editorial) | | this paper, are kept on site at the Stawell Gold Mine. Special attention was paid to the Downloaded...indicates a compositional change from ankerite to sideroplesite/ siderite (Figure 11a). In addition to the orbicular...m). Note the deposition of clear crystals of sideroplesite (Sdpl) in the strain shadow to S3. (e) Chlorite-altered...carbonic alteration is present in the form of sideroplesite overgrowths on pre-existing carbonates in the...iron-formation sediments [e.g. Agnico Eagle Mine (Wyman et al. 1986), Lupin Mine (Lhotka & Nesbitt 1987) and the |  | | Journal (article/letter/editorial) | | Loughlin, G. F., The oxidized zinc ores oœthe Tintie district, Utah. Ecom GEOL. 9: 1-19, 1914. x4Talmage, S...different sourcesbut even on specimensfrom a single district. The "personalequation"is probablyimportantin...are breunnerite, mesitite, pistomesite, and sideroplesite) ß Siderite,FeO.CO•............ ] 1.633 ...vein with iron sulphides may be oxidized so that hematite stains the edges of grains.of a carbonate that...are numerous. Palachea4 reports 138 forms in one district. Schaller•5 found crystalsthat look octahedral |  | | Journal (article/letter/editorial) | | < 150 °C) reduced fluids, with replacement of hematite by magnetite, pyrite and Fe 2+-phyllosilicates...located in Aljustrel. The Aljustrel area (Beja district) of south Portugal contains extremely large massive...Quartzeye Tuff Formation (Barriga, 1983); AV~-ff+AV2rot= Mine Tuff Formation (Carvalho et al., 1976). Modified...a bluish-gray pyritic chert, with reduction of hematite to magnetite and pyrite. Bright-red jasper immediately...magnetite, pyrite and even chlorite replacing hematite. Vein-controlled reducing alteration can often |  | | Book | | Fayalite. Hematite. Specular Iron, Crocoisite, Pyrosmalite. Micaceous Iron. Eed Hematite, or Fibrous...Quellerz. Umber, tine. Diadochite. Brown Hematite. Hematite. Ochre, or Ochry Iron Ore. Yellow Ochre....the agate nodules. The agates now worked in that district, and sold as native productions, are chiefly obtained...2ft Si + 10 H. Analysis bv D. Forbes, from i^aes Mine .....3 " Silica . . Alumina . .31-03 9'29...Kirkcudbrightshire syenite.— i^orej^fn. Norway; at Naes Mine about 10 miles east of Arendal Jotun Carbonic acid |  | Gaucher, E.C., Tournassat, C., Pearson, F.J., Blanc, P., Crouzet, C., Lerouge, C., Altmann, S. (2009) A robust model for pore-water chemistry of clayrock. Geochimica et Cosmochimica Acta, 73 (21) 6470-6487 doi:10.1016/j.gca.2009.07.021 | Journal (article/letter/editorial) | | dolomite equilibria Dolomite and siderite or sideroplesite (Ca- and Mg-rich siderite) are observed in COx...(Tournassat et al., 2008). Consideration of sideroplesite with the solubility product determined in Tournassat...constrain the solubility of additional phases like sideroplesite and ankerite that could influence the Fe(II)...oversaturation with crystalline iron oxides (goethite, hematite, magnetite) in spite of the documented absence...Gibbsite_mc Gibbsite Gibbsite_am Magnetite Goethite Hematite Fe(OH)3 Illite-Mg Illite_IMt-2 Daphnite_14A |  | | Journal (article/letter/editorial) | | Uranium-thorium-gold-bearing quartz pebble conglomerate Nemo District, Black Hills, S.D. Volcanic Arc-related Mineral...metasedimentary and metavolcanic rocks Pearl District SE Sierra Madre, WY. and NE Park Range, Co. Fig...associated with sillimanite gneiss in the Pearl District of the southeastern Sierra Madre of Wyoming (Table...been identified in the French Slate although some hematite-rich quartzite is present in the lower part. Inasmuch... B in Fig. 2) has been the most productive gold mine in the United States. According to Redden and French |  | | Book | | stability of the main minerals of the BIF-goethite, hematite, magnetite, greenalite, minnesotaite, grunerite... . . . . . . . . . . . . .................... Hematite . . . . . . . . . . . . . . . . . . . . . . ....consisting of heavily banded and concretionary martite-hematite quartzites are also known among the rocks of the...formation of the Algoma series in the Lake Superior district, which was formed in the greenstone formation...of the rocks of the upper suite of the Saksagan district). Other ideas are known concerning the relationships |
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