 | | Journal (article/letter/editorial) | | Clay Minerals, Vol. 52, No. 2, 227–239, 2004. ULTRAMAFIC-ROCK-HOSTED VEIN SEPIOLITE OCCURRENCES IN THE...9 m), (2) light greenish-white dolomite with serpentine (0.5 m), (3) white dolomite with sepiolite (0...The first level has a mineral association of serpentine + dolomite C calcite C aragonite, the second...consists of dolomite + serpentine C calcite or dolomite + magnesite + serpentine, the third level comprises...is made up of dolomite + chlorite + smectite + serpentine. Dolomite, the main mineral of the alteration |  | | Journal (article/letter/editorial) | | include chromian spinels, olivine, pyroxenes and serpentine. The source of chromian spinels, olivine and...the Van Rees Mountains are the probable parent rocks for chromium-bearing sediments. Keywords: indicator...chromium used in steelmaking and in with large, ultramafic stratiform-type intrusions Bushveld Africa [17...podiform-type ophiolite associated with large, ultramafic layered intrusions Bushveld Africa sequences:...forming pods and lenses inside the mafic and ultramafic sequences:Luzon—Philippines Massif of Bulqiza—Albany |  | | Journal (article/letter/editorial) | | (III) oxyhydroxides (limonite) and minerals from serpentine-group minerals (lizardite, antigorite). The heavy...a typical ophiolite sequence. Cyclops Mountain rocks have undergone intense chemical weathering processes...indicates that the evolution of parental melt of these rocks evolved towards magma with geochemical parameters...region, i.e., the Cyclops ophiolite [5], Papuan Ultramafic Belt [6,7], Seram-Ambon ophiolite [8] and ophiolites...to the Cyclops ophiolite [18]. Cyclops Mountain rocks underwent intense chemical weathering processes |  | | Corporate Document (Series) | | map sheet boundaries Main mineral locations, northeast Tasmania ... ... ... ... Main mineral locations...POST-DEVONIAN COVER ROCKS 43 43• LEGEND D - [2) Figure 1 6 Permo-Triassic sedimentary rocks, Jurassic dolerite...Volcanics Late Cambrian to Early Devonian sedimentary rocks; Mathinna Group Early Cambrian al/octhons: Ullramafic-mafic...{black); sedimentary rocks and basalt D Neoproterozoio-Early Cambrian sedimentary rocks and basalt Neoproterozoic...Mesoproterozoic: Metasedlmentary rocks; relatively unmetamorphosed sedimentary rocks; Arthur Metamorphic Complex |  | | Journal (article/letter/editorial) | | more than 100 µm, and occurs in contact between serpentine and sulfides, such as pyrrhotite, chalcopyrite...as accessory minerals associated with mafic–ultramafic rocks, especially with chromitite, and as nuggets...actinolite, micas, talc, chlorite, and a serpentine subgroup mineral. 3. Methods The polished blocks were...pentlandite) and serpentine (Figure 3B–D). (pyrrhotite, chalcopyrite, pentlandite) and serpentine (Figure 3B–D)... (pyrrhotite, chalcopyrite, pentlandite) and serpentine (Figure 3B–D). Minerals 2020, 10, 373 4 of |  | Zaccarini, Federica, Garuti, Giorgio, Luvizotto, George L., de Melo Portella, Yuri, Singh, Athokpam K. (2021) Testing Trace-Element Distribution and the Zr-Based Thermometry of Accessory Rutile from Chromitite. Minerals, 11 (7) 661 doi:10.3390/min11070661 | Journal (article/letter/editorial) | | phase in various igneous and high-grade metamorphic rocks, although half of the present day annual production...successfully applied to rutile from silica-free, ultramafic rocks such as chromitites [13,14], since the obtained...Zr-in-rutile thermometer applied to silica under-saturated rocks composed mainly of chromite, (3) evaluate the role...scarcity of accessory rutile. Table 1. Mafic-Ultramafic complexes host of rutile-bearing chromitite and...Complex (Bahia State, Brazil): Intracratonic mafic-ultramafic sill (Paleoproterozoic) Ipuera Socò Prospect |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | even today, individual minerals (as distinct from rocks) are referred to as species. The period 1830-1859...Mineralogisk-Geologisk Museum, University of Oslo, Oslo, Norway. Richard J. Reeder: Dept. of Earth Sciences, State...extraterrestrial substances (meterorites, moon rocks, etc.) apparently produced by processes similar...multiplicity of one or more lattice parameters. The term subgroup is used when many species exhibit Descriptions...the exception of a very low content of H,0, lunar rocks so far examined are very similar to some rock types |  | | Journal (article/letter/editorial) | | not only in altered basic magmatic rocks marker for basement rocks but also affected by extraterrestrial...followed by Mesozoic, Paleozoic and Precambrian rocks which is a manifesto for the expression “Clay &...and claystones including phyllosilicate- bearing rocks are fourth in the row as to the global production...dimension stones there are also some hidden sedimentary rocks rife with phyllosilicates such as slates and flagstones...with a great variety of sedimentary and volcanic rocks which formed the Precambrian through the Lower Carboniferous |  | | Book | | serpentinites, with gabbro and metamorphosed basic igneous rocks, represents a dismembered abducted ophiolite, originally...Both occur as alteration products of basic igneous rocks. Pre-granitic vein deposits Polymetallic (antimony-lead...fluorite, and a stroll along the beach at Megiliggar Rocks, near Porthleven, will reveal more attractive pegrnatites...is one of the most chemically evolved intrusive rocks in Britain and it hosts many rare species (e.g....limestone sequence. Alteration of these volcanic rocks has produced a rock locally known as toadstone. |  | | Journal (issue) | | Ekati diamond mine, which is located about 300 km northeast of Yellowknife in the Northwest Territories. Artwork...University, India) and A. B. Rao described the source rocks (mostly pegmatites) for many gems (e.g., ruby, alexandrite...potential for gold recovery. Highly translucent green serpentine from Afghanistan. Franck Notari of GemTechLab...hydrostatically) was 2.55 ± 0.05. These data are typical for serpentine. Further testing was required to identify the...the particular species in the serpentine “subgroup” of the kaoliniteserpentine mineral group. Energy-dispersive |  | | Book | | Geochemical Constraints on the Origin of Mafic–Ultramafic-Hosted Sulphides: The Pindos Ophiolite Complex...on the platinum-group elements in mafic-ultramafic rocks and associated deposits (chromite, sulfides, magnetite...origin of ore deposits related with mafic-ultramafic rocks, platinumgroup minerals in chromitites from ophiolite...geochemistry, and mineralogy of mafic-ultramafic rocks and associated ore deposits. His main research interests...rock-types, such as calc-alkaline and ophiolitic rocks, porphyry-Cu deposits, skarn-type, ultramafic lavas |  | | Journal (article/letter/editorial) | | NORTHWEST AFRICA 7317 AND TAFASSASSET: TWO EQUILIBRATED ROCKS RELATED TO CR CHONDRITES. D. Abe1,2 and T. Mikouchi1...comparable to those of CV chondrites from the oxidized subgroup (CVox). No 26Mg excesses resulting from the decay...thermodynamic calculations, the first solar system rocks are believed to have formed by gas-solid condensation...inclusions (CAIs) from chondritic meteorites, the oldest rocks formed in the solar system, thus formed from high...landing sites are located, enabling access to “rocks” (24 mm, ~50 mg, basaltic fragments) that formed |  | | Book (volume) | | Graz, Austria Andrew R Armour Revus Energy A/S Norway R A Howie John Collinson Shunsho Ishihara Delos...generally understood to be restricted to the study of rocks: according to the old dictum of the Geological Survey...Earth Science. This includes not only the study of rocks (the lithosphere), but also the atmosphere and hydrosphere...Fossils; Vendian and Ediacaran, Russia, Sedimentary Rocks: Banded Iron Formations. Shields. Terranes, Overview...Fossils; Vendian and Ediacdran. Russia. Sedimentary Rocks: Banded Iron Formations. Shields. Terranes, Overview |
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