 | | Journal (article/letter/editorial) | | of intermediate solid solutions in the system thoriteâxenotimeâzirconâcoffinite H.-J. FoÌrster * University...solutions of the tetragonal thoriteâxenotimeâzirconâcoffinite mineral group with partially novel compositions...leucogranites of either I- or A-type affinity. Thorite from the Erzgebirge contained up to 18.8 wt.% Y2O3...of this mineral group, and is observed to exist between thorite and xenotime, thorite and coffinite, and...and YâHREE-bearing thorite and zircon. Complex, hydrous solid solutions containing elevated abundances |  | | Report (volume) | | Systematic Mineralogy Of Uranium And Thorium By CLIFFORD FRONDEL GEOLOGICAL SURVEY BULLETIN 1064...Clifford, 1907Systematic mineralogy of uranium and thorium. Washington, U. S. Govt. Print. Off., 1958. viii...361-396. 1. Uranium ores. 2. Thorium. 3. Uranium ores-Bib!. 4. Thorium-Bib!. I. Title. II. Title: Mineralogy...Mineralogy of uranium and thorium. (Series) QE75.B9 no. 1064 549.74 -----Copy 2. QE391.U67F7 G S 58-254...intensive study of the mineralogy of uranium and thorium as part of its program of investigation of the |  | | Report (issue) | | Contributions to the Geology of Uranium and Thorium by the United States Geological Survey and Atomic... Contributions to the Geology of Uranium and Thorium by the United States Geological Survey and Atomic...· as a joint program of the Manhattan Engineer District and its successor, the U. S. Atomic Energy Commission...Survey. It is probably safe to say that no other group of materials has been so exhaustively studied in...possibilities of obtaining long-range supplies of uranium, thorium, and other substances from igneous rocks, by Harrison |  | | Journal (article/letter/editorial) | | data for thorium and uranium in zircons from granitic rocks are discussed, and new data for thorium and uranium...data show that thorium and uranium are at very low levels (from I.8 to 7.2 ppm for thorium, and from 7.0...relationship of these two elements in igneous rocks. THORIUM AND URANIUM IN ZIRCONS (i) Zircons from granitic...considered, a further eighty-six determinations of thorium and uranium in granitic zircons from the recent...1000 3000 10000 1 3Orml Uranium,ppm Fig. 1. Thorium and uranium concentrcttions in âgraniticâ literature |  | | Journal (article/letter/editorial) | | accessory minerals such as monazite, xenotime, and thorite for minor- and trace-element concentrations and...geochronology on materials rich in Th and/or U (uraninite, thorite, monazite, etc.). Attempts to work with monazite...et al. 2002), badelleyite (French et al. 2002), thorite, and huttonite (Lumpkin and Chakoumakos 1988; Förster...spectra acquired from monazite from Elk Mt., NM. Thorium, U, and Pb were measured using PET monochrometers...high-Th core contains 7â8 wt% Th and the lower thorium domains contain 3â4 wt% Th. boundaries (with resulting |  | | Journal (article/letter/editorial) | | radiation effects of thorite-group minerals from the Harding pegmatite,Taos County, New Mexico GnnconvR...microclinespodumenezone of the Harding pegmatite, Taos County, New Mexico. Electron-microplobe analyses(wto/o)give...mixed types of hydroxyl species.Both varieties of thorite are partially recrystallized.In the brown variety...alpha-decay{amaged thorite enriched in P and V is inferred to be lower than for ideal thorite or U-rich microlites...microlites from the microcline-spodumenezone. Thorite from the quartz, quartz-lath spodumene,and micro |  | | Journal (article/letter/editorial) | | BRECCIAS FROM THE BLUE JAY MINE, JAMESTOWN' BOULDER COUNTY, COLORADOI -q'NnKrvoro ONonaSntueuoro, Gnonco Pn-q...breccias from James town, colorado, the mineral thorite, variety uranothorite, was identified on the basis...literature, all of which represent hydrated material. Thorium halos in fluorite are described, probabiy for the...larger fluorite producers in the Jamestown district, Boulder county, colorado. GeorgePhair visited the second...had been found in a placer sample from the Ruby district, Alaska, emphasized the need for the specificdetermination |  | | Journal (article/letter/editorial) | | 2005 Copyright © 2005 Elsevier Ltd Printed in the USA. All rights reserved 0016-7037/05 $30.00 â«č .00 doi:10...Formation enthalpy of ThSiO4 and enthalpy of the thorite ÂĄ huttonite phase transition LENA MAZEINA,1 SERGEY...California 95616, USA 2 Oak Ridge National Laboratory, Oak-Ridge, Tennessee 37831, USA (Received December...AbstractâThe standard enthalpy of formation of thorite and huttonite and the enthalpy of the phase transition...calorimetry. Standard enthalpies of formation of thorite and huttonite are reported for the first time and |  | | Journal (article/letter/editorial) | | Petrology © by Springer-Verlag 1988 The Zircon-Thorite Mineral Group in Metasomatized Granite, Ririwai, Nigeria...Geochemistry and Metastable Solid Solution of Thorite and Coffinite C. M. Pointer, J, R. Ashworth, and... All the rocktypes carry accessory amounts of thorite, locally accompanied by trace amounts of paragenetically...biotite granite, thorite and coffinite range to high Zr contents (25.1 wt% ZrO2 in thorite and 11.7 wt% in... yttrium contents range up to 13.9wt% Y203 in thorite and 15.9 wt% in coffinite. From stoiChiometric |  | | Journal (article/letter/editorial) | | Petrology © by Springer-Verlag 1988 The Zircon-Thorite Mineral Group in Metasomatized Granite, Ririwai, Nigeria...proposed here, for numerous small inclusions of thorite in some parts of grains, is exsolution (following...alteration ("passive zoning" of Speer, 1982), and thorite micro-inclusions which will be interpreted as exsolution...backscattered-electron SEM. Since backscattering The Zircon-Thorite Group in Metasomatized Granite. 2. 23 increases...inclusions in the intermediate zone are mostly thorite (confirmed by microanalysis), associated with some |  | | Report (volume) | | in italics .and indented two spaces, are used to group entries under the geographic he~dings· and under... Jr. Minnesota, Fillmore County: Pederson, C. A. New Jersey, Dover district, magnetite: Sims, P. K.,...geology. Iron, Dover district, magnetite: Sims, P. K., 1. Iron. New Jersey, Dover district, magnetite: Sims...will be included under the larger, more general group heading rather than under an individual entry: that...society. A.I.M.E. Trans.-American Institute of Mining, Metallurgical, and Petroleum Engineers Transactions |  | | Journal (article/letter/editorial) | | Publishers B.V., A m s t e r d a m 133 [3] Thorite in fault zones of a granitic pluton, Atikokan,...ABSTRACT Kamineni, D.C. and Lemire, R.J., 1991. Thorite in fault zones of a granitic pluton, Atikokan,...fuel waste disposal. Chem. Geol., 90:133-143. Thorite, identified under a scanning electron microscope...and development of corona structures around the thorite suggest its growth during postkinematic conditions...ThO2 and SiO2 constitute the major oxides in the thorite found in the pluton, while Ce203, Fe203, CaO, UO2 |  | Piilonen, P. C., Rowe, R., Poirier, G., Grice, J. D., McDonald, A. M. (2014) Discreditation of thorogummite. The Canadian Mineralogist, 52 (4) 769-774 doi:10.3749/canmin.1400058 | Journal (article/letter/editorial) | | name âthorogummiteâ for any hydrated, metamict thorite or unidentified alteration product of a Th-bearing...âthorogummiteâ and other alteration products of thorite were performed on heterogeneous mixtures of mostly...proposed (SiO4)4â â (OH)44â substitution between thorite and thorogummite was examined and shown to be an...are Th- and Si-dominant and must be considered thorite. Furthermore, the majority of the compositions...âthorogummiteâ are simply metastable hydrated or metamict thorite with varying volumes of other alteration products |  | | Journal (article/letter/editorial) | | Accepted Manuscript The thorite mineralization in the Madeira Sn-Nb-Ta world-class deposit (Pitinga,... Bastos Neto, N.F. Botelho, V.P. Pereira, The thorite mineralization in the Madeira Sn-Nb-Ta world-class...disclaimers that apply to the journal pertain. The thorite mineralization in the Madeira Sn-Nb-Ta world-class...zircon) and Th (thorite) are potential byproducts. This work presents a detailed study of thorite mineralization...(average of ~ 0.51 wt.% ThO 2). Thorite compositions are either close to the thorite pole or correspond to relatively |  | Cabral Pinto, Marina, Silva, Maria, Neiva, Ana, GuimarĂŁes, Fernanda, Silva, Paulo (2018) Release, Migration, Sorption, and (Re)Precipitation of U during Peraluminous Granite Alteration under Oxidizing Conditions in Central Portugal. Geosciences, 8 (3) 95 doi:10.3390/geosciences8030095 | Journal (article/letter/editorial) | | uraninite, coffinite, saleeite, meta-saleeite, and thoriteâand U-bearing mineralsâsuch as xenotime, monazite...to 84.0 wt. % UO2 in the cores of the crystals. Thorite was found in all of the granite samples, and its...10.4 wt. % UO2 . Some thorite seemed to be primary, whereas the other thorite was related to the granite...fractures of several minerals. In the altered granite, thorite had low UO2 contents (0.46 wt. %) in the fractured...alteration of apatite, and were frequently replaced by thorite. Monazite and xenotime from the altered granite |  | | Journal (article/letter/editorial) | | DOI 10.1007/s00269-006-0100-3 ORIGINAL PAPER Thorite versus huttonite: stability, electronic properties...properties and stability of thorium orthosilicate ThSiO4 polymorphs: thorite and huttonite are investigated... potential (FLAPW-GGA). The forbidden gaps of thorite and huttonite are estimated at about 7.8 and 7...occupied O2p bands. The data obtained showed that thorite is more stable than huttonite; in turn both ThSiO4...of X-ray emission (XES) (Si,O)Ka,b spectra for thorite, huttonite as well as for SiO2 and ThO2 are calculated |  | | Journal (article/letter/editorial) | | in vein depositsin the copper King mine, Larimer county, colorado. It is also associatedwith asphaltic...zircon; material from the Arrowhead mine in Mesa County, Colorado, has ao:6'94 A, co:6.31A, oo:ro:1:0.909...minerals of the thorite group (e.g., uranium entering into ThSiO4 in replacement of thorium ions) suggeststhe...radioactive ore from the La Sar No. 2 mine, Mesa County, Colorado, which gave a zircon-typ e tc-raydifiraction...of Harvard University, furnished specimens of thorite and thorogummite that he had previously studied |  | | Journal (article/letter/editorial) | | Hydrothermal stability studies of the zircon-thorite group*t F . A. 5IU.~leTO.',- a n d R. R o t College...relations among minerals of tim zircon-thorito group and the effect of related oxides on them have been...metamictized zircon and thorite. The phase equilibrium involved in tim thorite--huttonite polymorphism...connexion with the composition of natural zircon and thorite. The application of the experimental data to natural...equilibria existing among the several minerals of this group. G e o l o g i c a l l y , z i r c o n i u m , h |  | | Journal (article/letter/editorial) | | Metamictization effectshave been investigatedin zircon, thorite, uranothorite, and thorogummite using X-ray absorption...next-nearestneighbors (Si and Zr ill'zircon, Si in thorite). In zircon, Zr-O distances decreaseby =0.1 A while...coordination of Th in crystalline thorite is preservedin metamict thorite. Si secondneighbors around Zr or...No other contribution to EXAFS is observed in thorite, but Zr-Zr distancesare observedin zircon. They...preciselycharacterizedwith the available EXAFS data. In the thorite samples investigated, U occurs as uranyl groups |  | | Report (volume) | | [Chronicle of Mines and Mining Research. Center for Geological and Mining Research]. Paris, France....Amsterdam, Netherlands. Idaho Bur. Mines and Geology Bull. Idaho Bur. Mines and Geology County Rept.Idaho Bur...Geology Bulletin and County Report and Mineral Resources Report. Moscow, Idaho. Illinois GeoL Survey...Department of Geology and Mining, Madhya Pradesh. Raipur, India. Mining Geology-Mining Geology. Journal of...of the Society of Mining Geologists of Japan. Tokyo, Japan. Minnesota Dept. Conser:v. Div. Waters Tech |  | | Journal (article/letter/editorial) | | pathway for elements. Key-words: monazite, amorphous thorium silicate, TEM, FTIR, natural irradiation, aggregate...radioactive minerals, such as monazite, zircon, thorite, uraninite is of great interest for both U-Pb age...2002b; 2003; 2004). The two polymorphs of ThSiO4, thorite and huttonite, have the zircon (I41/amd) and monazite...they have an opposite behaviour to irradiation. Thorite has been found mostly in a metamict (i.e. amorphous)...ThSiO4 was previously thorite, since the only criterion to distinguish thorite from the huttonite is |  | Andersen, Allen K., Clark, James G., Larson, Peter B., Neill, Owen K. (2016) Mineral chemistry and petrogenesis of a HFSE(+HREE) occurrence, peripheral to carbonatites of the Bear Lodge alkaline complex, Wyoming. American Mineralogist, 101 (7) 1604-1623 doi:10.2138/am-2016-5532 | Journal (article/letter/editorial) | | is predominant over the more commonly observed thorite-type substitution in xenotime-(Y). Th/Ca-rich domains...carbonatite, rare earth elements, HREE, fractionation, thorium Introduction Late-stage HREE enrichment is observed...Th)(PO4)·H2O], a member 1605 of the rhabdophane group. We present some of the most complete electron microprobe...in the abundance of REE phosphates (rhabdophane group and xenotime) and HFSE minerals (rutile and pyrochlore)...carbonatites. However, rutile/pseudorutile and pyrochlore group minerals are the predominant Ti- and Nb-bearing |  | | Journal (article/letter/editorial) | | well as syngenetic fluid inclusions of calcite, thorite and thorianite. Late generations differ in the...numerous micron-sized inclusions of calcite and thorium phases. All zircon varieties have extremely low...contents. According to the compositions of zircon and thorite inclusion in it and experimental data on the simultaneous...pyrochrlore- and allanite-group minerals, ilmenite, titanite, sulfides, graphite, zeolite-group minerals, and prehnite...heterogeneity of zircon, as well as the composition of thorium Table 1. Ratios of the average contents of trace |  | | Journal (article/letter/editorial) | | study the distribution and chemistry of: zircon, thorite, xenotime, monazite, bastnâŹasite, synchysite, REE...its HfO2 contents vary from 1.01 to 5.24 wt.%. Thorite is common in the PG, becoming rare in the ZG. It...Johan protolithionite, quartz, accessory zircon, thorite, xenotime and monazite. (3) Interaction of this...in its apical part. This gave rise to Sn- and W-mining in Czechoslovakia and in Germany until 1989. Furthermore...electron microprobe. Analyses of zircon, monazite, thorite, bastnâŹasite, synchysite and REE oxyfluorides and |  | | Journal (article/letter/editorial) | | serieswith xenotime, which is isostructural with thorite and zircon. Quantitative electron-microprobeanalysesofcoftnite...subse- orado School of Mines) from a Homestake Mining quently found to be the major ore mineral in unoxidized...Doubly terminated tetragonal prismatic crystals nium mining region in the United States(Chenoweth and up to...14,/amd) and is isostructural with zircon and thorite (Speer, 1982a).Cofrnite crystals were handpicked...organicrich nodules from the Triassic Mercia Mudstone Group in England, which contained 2l wto/oYrO, (analysesnormalized |
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