 | Dill, H.G., Weber, B., FĂźssl, M., Melcher, F. (2006) The origin of the hydrous scandium phosphate, kolbeckite, from the Hagendorf-Pleystein pegmatite province, Germany. Mineralogical Magazine, 70 (3) 281-290 doi:10.1180/0026461067030331 | Journal (article/letter/editorial) | | pegmatites containing rutile, ilmenite, columbite, pyrochlore, wolframite, monazite and apatite. The alteration...crystallographic class 2/m and to the metavariscite group (Ramdohr and Strunz, 1980). Occurrences of kolbeckite...Springs, Arkansas, USA, Gleichenberg, Styria, Austria, Baia Sprie, Romania and SadisdorfErzgebirge, Germany...including older minerals such as columbite and pyrochlore, is fostered by the epitactic relations between...ionic radii. Locally, Nb-Ta and Ti oxides from granite-related and vein-type Sn-W deposits may carry signiÂŽcant |  | | Journal (article/letter/editorial) | | ,Kola, Italy Germany Heftet , Norway Styria, Austria I eESCRIBED ~Allende-meteorite I 2009 History...the Heftetjern-pegmatite in Tørdal The numerous granite pegmatites of the Tørdal area are situated within...basement (15201500 Ma) are intruded by the Tørdal granite (960-850 Ma) which is regarded as the source of...Telemark is geochemically different from other granite pegmatites in south Norway, being characterized...Conf. thortveitite. And minerals of the pyrochlore-microlite group contains from 1-5 wt. % Sn02, while the |  | Baldwin, J. R., Hill, P. G., Finch, A. A., von Knorring, O., Oliver, G. J. H. (2005) Microlite-manganotantalite exsolution lamellae: evidence from rare-metal pegmatite, Karibib, Namibia. Mineralogical Magazine, 69 (6) 917-935 doi:10.1180/0026461056960299 | Journal (article/letter/editorial) | | AND G. J. H. OLIVER1 1 2 3 Crustal Geodynamics Group, School of Geography and Geosciences, University...to the structure of pyrochlore (microlite). Hence, via the perovskite/pyrochlore analogy, hypothetical...manganotantalite-type structures may occur from a microlite (pyrochlore) host by solid-state diffusion via metastable...(1981) divided the orthorhombic columbite-tantalite group on the basis of chemical composition as follows:...pegmatites (Baldwin 1993, 2000). Columbite-tantalite group minerals are usually presented graphically on the |  | | Book (edition) | | to the chemical formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest...chemical formula, structure (crystal system, space group, and unit cell dimensions), and at least some other...site occupancy. The Sb members of the tennantite group (2.G) will serve as a good example: tetrahedrite...registered in this book (e.g. in the amphibole group). For more detailed information see "Dana's System...) 6-21 %. VHN(synth.) (10.C. purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite |  | | Journal (article/letter/editorial) | | tourmaline-bearing pegmatites were evidently generated from the graniteâpegmatite body in the footwall contact of the Fe-skarn...the respective parts of the parental Footwall graniteâpegmatite body. This observation seems consistent...derivation of pegmatite melts from evolving parental granite. Primitive to highly evolved and usually B-rich...the dominant high-grade paragneisses, the Varied Group contains numerous intercalations/small bodies of...quartzites and graphitic gneisses. The Monotonous Group is composed of migmatized sillimaniteâbiotiteâcordierite |  | | Journal (article/letter/editorial) | | Springer-Verlag 1988 Scandian Ixiolite, Pyrochlore and Bazzite in Granite Pegmatite in Tordal, Telemark, Norway...accepted February 15, 1988 Summary In Tordal granite pegmatite veins cut through a volcano-sedimentary...overlies an older, gneissic basement and younger granite from which they originate. Positive co-variations...(Ta,Nb,Sc,Sn,Fe,Mn,Ti)204 in association with pyrochlore, (Ca,Sc,Y,Sn,U)2(Ta,Nb,Ti)206(O,OH,F) and bazzite...pegmatite veins. Alteration from ixiolite to pyrochlore appears as a late magmatic-hydrothermal event |  | | Journal (article/letter/editorial) | | County, not Prince Wil liam County. of the Pyrochlore Group" by D. D. Ho garth which appeared in American...approved revised nomenclature for the pyrochlore group. The group, Dr. Wyman goes on to say that he got...three specimen is from Cloverdale, Sonoma namesâpyrochlore, microlite, and betafite- County and Peoples...changes are a boon to the understanding of the group. It is Some gold was purchased from a dealer sad...recently, with its usual imprecise stateof "new" pyrochlore group minerals of name-only locality label. The |  | | Journal (article/letter/editorial) | | gleichbleibendem Mn. Introduction Columbite-tantalite group minerals are ubiquitous in beryl-, complex-, albitespodumene-...(CĂernyĂ et al., 1985). The columbite-tantalite group minerals are therefore important in deciphering...of columbite-tantalite group minerals from the Separation Rapids pegmatite group in N.W. Ontario Âą a suite...Geological setting The Separation Rapids pegmatite group and the pluton with which it is associated lie almost...(Breaks, 1991; Breaks and Bond, 1993) and the granite-tonalite-dominated Winnipeg River Subprovince to |  | | Journal (article/letter/editorial) | | Article Niobium Mineralogy of Pliocene A1-Type Granite of the Carpathian Back-Arc Basin, Central Europe...August 2019 Abstract: A1 -type granite xenoliths occur in alkali basalts erupted during...The Pliocene (5.2 Ma) peraluminous calc-alkalic granite contains unusually high concentrations of critical...alkali basalt; columbite; granite; fergusonite; Pannonian Basin; pyrochlore; xenolith 1. Introduction...Introduction Niobium belongs to the group of incompatible high-field-strength elements (HFSE) concentrated in carbonatites |  | | Journal (article/letter/editorial) | | been covered by ongoing road construction. PYROCHLORE-GROUP MINERALS FROM THE WAUSAU COMPLEX, MARATHON...Wyck 1994) to 1505.9 Âą 2.7 Ma for the Nine Mile Granite (Dewane and Van Schmus 2007). The complex is usually...quarries have considerably expanded knowledge of pyrochlore group minerals in the Wausau Complex. Previous work...work (Falster et al. 2000) reported pyrochlore, ceriopyrochlore, bario-ceriopyrochlore, and yttropyrochlore...sampled include several pegmatites in the Dehnel quarry, an ROCKS & MINERALS 166-170 Rochester.indd 166 |  | | Report (issue) | | â Stop 3: Vulcan Materials Company, Spruce Pine Quarry) Bob and Alan Schabilion (Saturday â Stop 5: Emerald...STOP 3 â Vulcan Materials Company â Spruce Pine Quarry Jim Stroud, Marion Wiggins and Jeff PantherâŚâŚâŚâŚâŚâŚâŚâŚâŚâŚâŚâŚ...width. (Pegmatite is an igneous rock, similar to granite in composition, consisting of uncommonly large...reopened and pushed into the hard undecomposed granite by powder and steel. Blocks of mica have often...Several hundred mica disks were found in one of a group of two dozen mounds called Mound City, near Chillicothe |  | | Journal (article/letter/editorial) | | Pyrochlore supergroup minerals from the alkaline pegmatites in the Larvik Pluton ic Complex, southern...Poirier, Ralph Rowe & Alf Olav Larsen lntroduction Pyrochlore supergroup minerals are ubiquitous phases within...Vestfold, and was described in 1826 by Wdhler. Pyrochlore was the second mineral to be described as a new...Stokkoya (Langesundsfjord). The majority of these pyrochlore supergroup minerals are metamict and have undergone...extensive alteration. Late-stage euhedral crystals of pyrochlore, most only a few mm's across, are often late-stage |  | PrĹĄek, Jaroslav, Majka, Jaroslaw, Uher, Pavel, ChudĂk, Peter (2010) Niobium-tantalum minerals in the Skoddefjellet NYF granitic pegmatite, Svalbard Archipelago, Norway: Primary versus secondary assemblage. Neues Jahrbuch fĂźr Mineralogie - Abhandlungen, 187 (3) 235-248 doi:10.1127/0077-7757/2010/0172 | Journal (article/letter/editorial) | | ⤠1.7 wt. % Ta2O5), ilmenite, fersmite and pyrochlore group minerals: including yttropyrochlore-(Y), plumbopyrochlore...and plumbobetafite. Internal zoning of columbite group minerals is expressed by distinct rimward increase...Ta-rich titanite, Nb,Ta-rich rutile, ilmenite, pyrochlore-group minerals, fersmite, NYF granitic pegmatite...is occupied by metasediments of the Isbjørnhamna Group, which consists of paragneisses, calc-silicate schists...(BIRKENMAJER 1958, CZERNY et al. 1993). The Isbjørnhamna Group rocks underwent a multistage metamorphic history |  | | Journal (article/letter/editorial) | | 718.5 Ă
3. Alfredopetrovite is hexagonal, space group P62c. The single crystal unit-cell parameters are:...F)34, is a new mineral species from the Poudrette quarry (level 7), Mont Saint-Hilaire, Quebec, Canada....unit-cell parameters of the monoclinic cell (space group C2) refined from X-ray powder-diffraction data are:...aegirine, and richterite, minerals of the garnet group and a number of manganese and iron oxides with a... c = 22.290(2) Ă
, V = 2214.4 Ă
3, Z = 16, space group I41/acd. The crystal structure solved and refined |  | | Journal (article/letter/editorial) | | I.M.A. Subcommittee on nomenclature of the pyrochlore group and 3I end-member names provided by the LM...names for gemstones, a hypothetical polytype, a group name, and a rock name. As in the last three lists...a veinlet of Co and Ni minerals in a serpentine quarry near Oxford, Llano Co., Texas, contains red-violet... a 8"899, b 7"065, c 6"644 A, fl 97.25 ~ space group Cz/m. Composition 2[CoC12.6H20], with small amounts...a 7"764, b 6"o45, c 9-022 A, fl I 12"5 ~ space group P21/m. Composition [Pb2(Fe 3, ZnXAsO4)2(OH,H20)] |  | | Journal (article/letter/editorial) | | MINERAL PARAGENESES Compositional Variations of Pyrochlore Group Minerals in Ongonite and Zwitter of the Verkhneurmiysky...AbstractâThe pyrochlore-group minerals in ongonite and zwitter of the Verkhneurmiysky granite pluton in...rare species of pyrochlore, pyrochlore-I and pyrochlore-II in ongonite, and pyrochlore-III in zwitter...the Russian Far East. Pyrochlore-I is a possible new member of the pyrochlore group, bismuth-bearing âoxyferropyrochloreâ;...âoxyferropyrochloreâ; pyrochlore-II is an uranium-bearing and iron-bearing hydrokenopyrochlore; and pyrochlore-III is |  | Starikova, Anastasia E., Bazarova, Ekaterina P., Savelâeva, Valentina B., Sklyarov, Eugene V., Khromova, Elena A., Kanakin, Sergei V. (2019) Pyrochlore-Group Minerals in the Granite-Hosted Katugin Rare-Metal Deposit, Transbaikalia, Russia. Minerals, 9 (8) 490 doi:10.3390/min9080490 | Journal (article/letter/editorial) | | minerals Article Pyrochlore-Group Minerals in the Granite-Hosted Katugin Rare-Metal Deposit, Transbaikalia...August 2019 Abstract: Pyrochlore group minerals are the main raw phases in granitic...%), ThO2 (to 1.8 wt.%), and PbO (to 1.4 wt.%). Pyrochlore of this type is very rare in nature and is limited...columbite. Secondary-I pyrochlore follows cracks or replaces primary pyrochlore in grain rims and is compositionally...complete A- and Y-sites occupancy. Secondary-II pyrochlore is a product of late hydrothermal alteration |  | | Journal (article/letter/editorial) | | dolomite, fluorapatite, phlogopite, amphibole, and pyrochlore. The carbonatite is separated from amphibole-fenite...magnesioarfvedsonite (overgrowth, crystal rim). Uranium-rich pyrochlore is metamict and ranges from calciopyrochlore...Magnesiocarbonatite has a well-developed selvage against granite but lacks significant amphibole fenite. In breccia...breccia cement at nearby Fortune Lake, pyrochlore is associated with abundant fluorapatite but lacks carbonates...petrogenesis at Fen, metamorphism has obscured pyrochlore zonation and enhanced amphibole growth at Meech |  | | Journal (article/letter/editorial) | | Vol. 64(4), pp. 683â697 Primary zoning in pyrochlore group minerals from carbonatites D. D. HOGARTH1...University, Ottawa, Canada K1S 5B6 2 ABSTR ACT Pyrochlore group minerals have the general formula A16  xB... Ta, Ti and Z being O, F, OH. In this study, pyrochlore specimens were examined from carbonatites at...especially characterized by replacement rims, pyrochlore-inpyrochlore veinlets and low A-ion totals (Carillon...carbonatites, pyrochlore group, tantalum, niobium, uranium, cerium. Introduction THE pyrochlore group minerals |  | | Journal (article/letter/editorial) | | product with the composition of minerals of the pyrochlore group; (iii) multistage alteration, which involved:...formation of phases with the composition of pyrochlore group minerals; then crystallization of U-, Bi-...Keywords Liandratite ¡ Fergusonite ¡ NYF pegmatite ¡ Granite pegmatite ¡ Karkonosze Introduction Liandratite...ÂU6+Ta2O8 (GasĚ perin 1960), implying the P31m space group. Since its first description as a new mineral species...compositional similarity to the U-rich member of the pyrochlore group â uranopyrochlore (âĄ,U4+)2Nb2O6(O,OH,F) (Atencio |  | | Journal (article/letter/editorial) | | From the perspective of NbâTa minerals, the pyrochlore supergroup minerals have significance for indicating...fersmite, fergusonite-(Y), and especially pyrochlore group minerals) in samples from the Baicao and Xiaoheiqing...structure and compositional zoning. Four types of pyrochlore group minerals (pyrochlores I, II, III, and IV)...magmatic fractional crystallization stage. Anhedral pyrochlore III minerals are linked to the activity of magmaderived...fluids at the late stages of magma evolution. The pyrochlore IV minerals and fergusonite-(Y) tend to be more |  | Kolitsch, Uwe, Kristiansen, Roy, Raade, Gunnar, Tillmanns, Ekkehart (2010) Heftetjernite, a new scandium mineral from the Heftetjern pegmatite, Tordal, Norway. European Journal of Mineralogy, 22 (2) 309-316 doi:10.1127/0935-1221/2010/0022-1987 | Journal (article/letter/editorial) | | Naturhistorisches Museum, Burgring, 7, 1010 Wien, Austria *Corresponding author, e-mail: uwe.kolitsch@nhm-wien... UniversitaĚt Wien, Althanstr. 14, 1090 Wien, Austria Abstract: Heftetjernite, ideally ScTaO4, is a...metamict, dark greyish brown mineral of the pyrochlore-microlite group, and an unidentified, orange-brown, tabular...crystallises in the wolframite structure type, with space group P2/c and a Âź 4.784(1), b Âź 5.693(1), c Âź 5.120(1)...Recent investigation of the Sc-rich Heftetjern granite pegmatite in Tørdal, Telemark, southern Norway |  | | Book | | composed of several different minerals such a granite, the mineral grains abut against one another and...it possible to ascribe any crystalline form to a group of faces with very similar characteristics. H U...cavity. Below: Specimen of granite from Baveno, Piedmont, Italy. Above: A group of pyrite crystals showing...luster. topaz and minerals from the tourÂŹ maline group. Resinous This term is applied to a luster like...luster of heulandite, a mineral of the zeolite group, can be defined as pearly. Below, left to right: |  | Melleton, J., Gloaguen, E., Frei, D., Novak, M., Breiter, K. (2012) HOW ARE THE EMPLACEMENT OF RARE-ELEMENT PEGMATITES, REGIONAL METAMORPHISM AND MAGMATISM INTERRELATED IN THE MOLDANUBIAN DOMAIN OF THE VARISCAN BOHEMIAN MASSIF, CZECH REPUBLIC?. The Canadian Mineralogist, 50 (6) 1751-1773 doi:10.3749/canmin.50.6.1751 | Journal (article/letter/editorial) | | UâPb dates of minerals of the columbiteâtantalite group from eight rare-element pegmatites, belonging to...discuss (1) the behavior of U and Pb in columbite-group minerals, and (2) the link between the emplacement...late-orogenic S-type granites and post-orogenic A-type granite plutons (Kroner et al. 2010, FĂśrster et al. 2012)...prevailing high-grade paragneisses, the Variegated Group contains numerous intercalations of amphibolite...quartzite and graphitic gneiss. The Monotonous Group is composed solely of partly migmatitic cordier |  | | Book | | rocks contain large crystals, often of the feldspar group and are known as porphyries. The individual crystals...them. Among the plutonic rocks is the familiar granite with its coarse grain structure. It contains mostly...similar to granite but with no quartz. Sandstone (South Dakota, USA) _9_ A darker rock than granite but with...is formed by the mechanical disintegration of a granite. Shale is mostly made up of clay particles with...its reaching the surface. 11 Igneous Rocks Granite Nepheline syenite Syenite Dio rite Gabbro |
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Granite quarry, Markogel, Villach, Carinthia, Austria