 | | Journal (article/letter/editorial) | | ISOTOPIC STUDIES OF THE CRETACEOUS LITTLE NAHANNI PEGMATITE GROUP (NWT, CANADA) SUGGESTS MIXED FLUID RESERVOIRS...Sciences, Laurentian University, Sudbury, Ontario, Canada, LEE GROAT Department of Earth, Ocean and Atmospheric...British Columbia, Vancouver, British Columbia, Canada MOSTAFA FAYEK Department of Geological Sciences...Manitoba, Winnipeg, Manitoba, Canada Keywords: Little Nahanni Pegmatite Group, textures, stable isotopes...Situated in the Northwest Territories (Canada), the Cretaceous Little Nahanni Pegmatite Group (LNPG) is an |  | Cerny, P., Ercit, T. S., Smeds, S.-A., Groat, L. A., Chapman, R. (2007) ZIRCONIUM AND HAFNIUM IN MINERALS OF THE COLUMBITE AND WODGINITE GROUPS FROM GRANITIC PEGMATITES. The Canadian Mineralogist, 45 (2) 185-202 doi:10.2113/gscanmin.45.2.185 | Journal (article/letter/editorial) | | University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada T. Scott ERCIT Research Division, Canadian Museum...Museum of Nature, Ottawa, Ontario K1P 6P4, Canada Sten-Anders SMEDS Department of Earth Sciences, Uppsala...Columbia, Vancouver, British Columbia V6T 1Z4, Canada Ron CHAPMAN Department of Geological Sciences...University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada Abstract Niobiumātantalum-oxide minerals from...to 9.59 ZrO2 and 1.15 wt.% HfO2, and columbite-group minerals, up to 1.26 and 0.12 wt.%, respectively |  | Groat, L. A., Mulja, T., Mauthner, M. H.F., Ercit, T. S., Raudsepp, M., Gault, R. A., Rollo, H. A. (2003) GEOLOGY AND MINERALOGY OF THE LITTLE NAHANNI RARE-ELEMENT GRANITIC PEGMATITES, NORTHWEST TERRITORIES. The Canadian Mineralogist, 41 (1) 139-160 doi:10.2113/gscanmin.41.1.139 | Journal (article/letter/editorial) | | MINERALOGY OF THE LITTLE NAHANNI RARE-ELEMENT GRANITIC PEGMATITES, NORTHWEST TERRITORIES LEE A. GROATĀ§ Department...Columbia, Vancouver, British Columbia V6T 1Z4, Canada THOMAS MULJAĀ¶ 3709 Rutherford Crescent, North...North Vancouver, British Columbia V7N 2C6, Canada MARK H.F. MAUTHNERā” Department of Earth and Ocean Sciences...Columbia, Vancouver, British Columbia V6T 1Z4, Canada T. SCOTT ERCIT Research Division, Canadian Museum... Box 3443, Station D, Ottawa, Ontario K1A 0E8, Canada MATI RAUDSEPP Department of Earth and Ocean Sciences |  | | Journal (article/letter/editorial) | | including the age distributions of granites, detrital zircon grains, and passive margins. Lithium-cesium-tantalum...ca. 1000 Ma. Keywords: granitic pegmatite, LCT pegmatite, NYF pegmatite, secular trends, supercontinent...et al. 1979, Tkachev 2011). Our tabulation of pegmatite ages builds on that of Tkachev (2011), but we...to the comprehensive book by London (2008). Pegmatite Geochronometers Although granitic pegmatites are...precise, accurate ages have proven elusive for many pegmatite occurrences, especially those in the LCT family |  | | Journal (article/letter/editorial) | | from Canada Downloaded by [Florida International University] at 19:52 23 August 2013 C anada is home...amethyst to zircon, from emerald to sapphire, Canada has it all. Yet, for most of its history, Canada has been...species have been found at one time or another in Canada (fig. 1). Some gem localities, such as those for...discovered much more recently. In the past there was little, if any, direct exploration for colored gemstonesāmany...S. WILSON PO Box 352 Kingston, Ontario K7L 4W2 Canada brad@alpinegems.ca 96*2: 405,9(3: The |  | | Journal (article/letter/editorial) | | phosphate mineralization of the Hagendorf-Pleystein pegmatite province, Germany: with special reference to laser-ablation...mineralization, torbernite, limonite, Hagendorf-Pleystein pegmatite province, Germany, LA-ICP-MS. Introduction DILL...broadly agree with the Rb-Sr age of the Hagendorf pegmatite (Glodny, 1997). In addition, they present age...analyses on ferrocolumbite from the Pleystein pegmatite and a 549 6 12 Ma discordia intercept age for...torbernite mantling this limonite from the Hagendorf pegmatite. These ages are older than the rock hosting the |  | Smith, S. R., Foster, G. L., Romer, R. L., Tindle, A. G., Kelley, S. P., Noble, S. R., Horstwood, M., Breaks, F. W. (2004) U-Pb columbite-tantalite chronology of rare-element pegmatites using TIMS and Laser Ablation-Multi Collector-ICP-MS. Contributions to Mineralogy and Petrology, 147 (5) 549-564 doi:10.1007/s00410-003-0538-y | Journal (article/letter/editorial) | | Cs, Ta) pegmatites in the Superior Province of Canada. Conventional TIMS analyses of these columbite-tantalite...933 Ramsey Lake Road, Sudbury, Ontario, P3E 6B5, Canada G. L. Foster Department of Geology, Leicester University...Smith Geological Survey of Canada, 601 Booth St., Ottawa, Ontario, K1A 0E8, Canada fractionation between...Lake pegmatite, 2644Ā±7 Ma for the Separation Rapids group, and 2665Ā±8 Ma for the Mavis Lake group. The...and Mn for Fe during the crystallisation of a pegmatite magma (CernyĢ and Ercit 1985). The eļ¬ect on the |  | | Journal (article/letter/editorial) | | compositional gap between the host granite and the pegmatite. Lithium isotopic composition of muscovites and...zone of the internally zoned pegmatite and from the granite to the pegmatite for the un-zoned pegmatites...operating in tandem with vapour exsolution. Keywords Pegmatite Ā· Rayleigh fractionation Ā· Li isotope Ā· Boron...refers to the appearance of chemically different pegmatite bodies with increasing distance from the granitic...(1982) and ÄernĆ½ (1991b) suggested that zoned pegmatite fields formed by continuous or episodic melt extraction |  | Li, Jie, Huang, Xiao-Long, Wei, Gang-Jian, Liu, Ying, Ma, Jin-Long, Han, Li, He, Peng-Li (2018) Lithium isotope fractionation during magmatic differentiation and hydrothermal processes in rare-metal granites. Geochimica et Cosmochimica Acta, 240. 64-79 doi:10.1016/j.gca.2018.08.021 | Journal (article/letter/editorial) | | rare-metal granites that contain niobium-tantalum and tungsten deposits, respectively. As a moderately incompatible...mineralization in the rare-metal granitic rocks. Tungsten mineralization is likely associated with an open...phases of pegmatites (Magna et al., 2016). In a pegmatite, the late solidus to early subsolidus phases (e...of the Yashan Ta-Nb granite and the Xihuashan tungsten granite, with the aim to show the essence of the...traditionally divided into the Yangtze Block in the northwest and the Cathaysia Block in the southeast with |  | | Report (issue) | | ..................... 24 Regional rare-metal pegmatite zoning and lithogeochemical anomalies ................................................... 25 Pegmatite dimensions and structure ................................................................. 43 Tungsten inert-gas welding ..............................International tantalum resources ā exploration and mining Canada, Alaska, and Greenland ..................................................................... 63 Canada .............................................. |  | | Journal (article/letter/editorial) | | Isotopic compositions in the Monts dāAmbazac Pegmatite Field (French Massif Central) RI P T exhibit...with the degree of magmatic evolution of each pegmatite type: from 630 ppm in Type II up to 13,500 ppm...ppm in the more evolved NU Type VI pegmatite. Although the rare-element contents e.g., Li, Cs, Ta of...of the micas are MA consistent with pegmatite differentiation, ļ¤7Li (ā°) are firstly, independent of the...degree of magmatic differentiation (independent of pegmatite type) and secondly, independent ED of the content |  | | Journal (article/letter/editorial) | | isotopic constraints on the origin of Li-poor pegmatite with implications for Li mineralization Bin Chen...isotopic constraints on the origin of Li-poor pegmatite with implications for Li mineralization, Chemical...isotopic constraints on the origin of Li-poor pegmatite with implications for Li mineralization Bin Chen*...alternative model to interpret the genesis of pegmatite and factors controlling Li mineralization based...Li-poor pegmatites (barren) from the Qinghe of pegmatite field of the Altai orogen (NW China). The Qinghe |  | Dittrich, Thomas, Seifert, Thomas, Schulz, Bernhard, Hagemann, Steffen, Gerdes, Axel, PfƤnder, Jƶrg (2019) Archean Rare-Metal Pegmatites in Zimbabwe and Western Australia - Geology and Metallogeny of Pollucite Mineralisations. Springer International Publishing. doi:10.1007/978-3-030-10943-1 | Book | | focused on a single mineral deposit or a limited group of deposits (sub-regional level), with regard to...limited. Cs resources can be categorised into one group of potassium salts, sedimentary rocks and seawater...resource group of commercial importance is LCT pegmatites that contain the rare zeolite group cesium mineral...LCT pegmatite deposits at Bikita in the Zimbabwe Craton and Tanco in the Superior Craton in Canada, where...occurs in monomineralic mineralisation. Both pegmatite deposits have a comparable regional geological |  | Liu, Shanqi, Li, Yongbing, Liu, Jie, Ju, Yiwen, Liu, Jianming, Yang, Zhiming, Shi, Yaolin (2018) Equilibrium lithium isotope fractionation in Li-bearing minerals. Geochimica et Cosmochimica Acta, 235. 360-375 doi:10.1016/j.gca.2018.05.029 | Journal (article/letter/editorial) | | not depend on rare earth elements in zircon, thus Li in zircon can provide a peak temperature indicator...geospeedometer for zircon (Trail et al., 2016). Moreover, during volcanic eruptions, Li zoning in 2 zircon might...fluid-rock interaction which is related to granitic pegmatite formation (Liu et al., 2010; Teng et al., 2006a)...formed at the same crystallization stage in a pegmatite body, if the range of Ī“7Li variations is much...variations, Li isotope fractionation in this pegmatite body does not reach isotopic equilibrium. It can |  | Xiang, Lu, Romer, Rolf L., Glodny, Johannes, Trumbull, Robert B., Wang, Rucheng (2020) Li and B isotopic fractionation at the magmatic-hydrothermal transition of highly evolved granites. Lithos, 376. 105753pp. doi:10.1016/j.lithos.2020.105753 | Journal (article/letter/editorial) | | rock, magmatic and hydrothermal tourmalines show little variation in Ī“11B (ā12.5 to ā8.2ā°), a signature...granitic pegmatite, Ī“11B of tourmaline decreases by ~6ā° from outer to inner zones of the pegmatite and from...overlain by sandy-pelitic rocks of the Danzhou Group (maximum depositional age ~ 800ā750 Ma, Wang et...amounts of tourmaline, and accessory minerals such as zircon, apatite, xenotime, rutile, and cassiterite. The...~5ā10% K-feldspar, and accessary minerals including zircon, apatite, xenotime, wolframoixiolite, columbite |  | | Journal (article/letter/editorial) | | Jo ur geology and mineralogy, as well as the zircon U-Pb chronology and Hf isotope geochemistry, of...adjacent migmatites and luecogranite dykes. Their zircon U-Pb ages are 274-253 Ma, with the dominating age...juvenile and specific components in the Habahe Group, which indicates the dependency of mineralization...mineralization on source from the heterogeneous Habahe Group metasedimentary The pegmatites also show decoupling...likely generated by anatexis of the lP Habahe Group metasedimentary rocks under an extensional setting |  | | Report (issue) | | Renfrew, Ontario, Canada; 7. Canada; 8. South Burgess, Lanark Co., Ontario, Canada 10. Snarum, Norway;...Kragero, Norway; 12. Eganville, Renfrew Co., Ontario, Canada; 13. (Phosphorite) Staffel, Limburg, Hesse-Nassau...Thousand Pound Crystals and Eighty Carat Gemstones-Canada is BIG! BY KIMBERLY TAIT AND MICHAEL BAINBRIDGE...town ofEhrenfriedersdorfin the Erzgebirge ("Ore Mountains") of southern Germany. The tin deposit in Ehrenfriedersdorf...and the name "apatite" came to describe a mineral group in which three mineral species share the same root |  | | Journal (article/letter/editorial) | | signature of this Li can traverse the mantle wedge with little modiļ¬cation. It is only in arcs such as the Lesser...1ā16.1 Ma) and the recent arc (0ā5.1 Ma). Each group is composed of a variety of volcanic phases, which...elementbearing pegmatites from the Little Nahanni Pegmatite Group, NWT, Canada. Lithos 132ā133, 21ā36. Bebout...Chauvel C., Maury R. C. and Mattielli N. (2009) The āzircon eļ¬ectā as recorded by the chemical and Hf isotopic...fractionation in country rocks of the Tin Mountain pegmatite. Earth Planet. Sci. Lett. 243, 701ā710. Teng F |  | | Journal (article/letter/editorial) | | Karelia, and also from Malkhany and AdunTchelon pegmatite in Transbaikalia and Voroni Tundras on Kola peninsula...dissolution of quartz. A phenolic hydroxyl group and a carboxyl group are often contained in main functional...nucleosynthetic anomalies. (3) Olivines from four main group pallasites yield deficits in G26Mg* = -0.0157Ā±0...ac.uk) 2 Dept. Geology, University of Toronto, Canada 3 Dept. Geosciences, University of Houston, USA...enrichment of magmatic sulfides in the platinum-group elements (PGE) is understood only in broad terms |  | | Journal (article/letter/editorial) | | The complexity of this orogen, with domains of little or no Variscan metamorphism and neighboring belts...nappes in the ErzgebirgeāVogtland. (ii) The second group, the most important by volume, comprises granites...emplacement of these nappes. (iii) The youngest group (c. 305ā275 Ma; e.g., Nasdala et al., 1998b; SchaĢfer...but show contrasting Variscan overprint, i.e., little or no deformation in the Autochthonous Domain and...rocks of type (v) (e.g., Gottesberg) belong to the group of <305 Ma magmatism, i.e., to the post-Variscan |  | Phan, Thai T., Capo, Rosemary C., Stewart, Brian W., Macpherson, G.L., Rowan, Elisabeth L., Hammack, Richard W. (2016) Factors controlling Li concentration and isotopic composition in formation waters and host rocks of Marcellus Shale, Appalachian Basin. Chemical Geology, 420. 162-179 doi:10.1016/j.chemgeo.2015.11.003 | Journal (article/letter/editorial) | | and Carr, 2013). It is the basal unit of Hamilton Group, and was deposited during the Acadian orogeny (Lash...element-bearing pegmatites from the Little Nahanni Pegmatite Group, NWT, Canada. Lithos 132-133, 21ā36. 177...its isotopes during weathering in the Mackenzie Basin, Canada. Geochim. Cosmochim. Acta 74 (14), 3897ā3912...Basin Middle Devonian Depositional System from UāPb Zircon Geochronology of Volcanic Ashes in the Marcellus...fractionation in country rocks of the Tin Mountain pegmatite. Earth Planet. Sci. Lett. 243 (3ā4), 701ā710. |
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