 | | Journal (article/letter/editorial) | | Rare Earth Mining and Exploration in North America The Mountain Pass deposit, California Anthony N.... Mariano1 and Anthony Mariano Jr.2 1811-5209/12/0008-0369$2.50 T DOI: 10.2113/gselements.8.5.369 he...(REEs) in North America are abundant and diverse in mineralogy and geology. The Mountain Pass carbonatite...tonnage of REEs, amenability to mineral processing and extraction of the REEs must be definitively established...geochemical, and petrological characterizations are a vital requirement in mineral exploration and are particularly |  | Mitchell, R. H., Welch, M. D., Kampf, A. R., Chakhmouradian, A. K., Spratt, J. (2015) Barrydawsonite-(Y), Na1.5CaY0.5Si3O9H: a new pyroxenoid of the pectolite–serandite group. Mineralogical Magazine, 79 (3) 671-686 doi:10.1180/minmag.2015.079.3.12 | Journal (article/letter/editorial) | | 3 4 AND J. SPRATT2 Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1...Sciences, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 [Received 6 October 2014; Accepted 30 November...occurs at the Merlot Claim, North Red Wine Pluton, Labrador, Canada (62º32’38.54’’ W; 54º08’1.37’’ N)...N). The host rock is a metamorphosed eudialyte syenite consisting of eudialyte, potassic arfvedsonite,...nepheline, albite and potassium feldspar with accessory Y-bearing pectolite, britholite and steenstrupine |  | | Journal (article/letter/editorial) | | syenites (and phonolites) containing minerals such as eudialyte and rinkite, that is complex silicates...silicates of Zr, Ti, the rare earth elements (REE), and F and other volatiles. There are, however, cases of transition...Li, Be, Nb, Ta, REE, Zr, Th, etc. and of volatiles, first of all F and C1. This gives rise to a wealth...Lovozero and Khibina complexes of the Kola peninsula, about 250 in Mont Saint-Hilaire, Quebec, Canada, and...the Ilfmaussaq complex, South Greenland. These rocks have very long melting intervals and solidus temperatures |  | | Journal (article/letter/editorial) | | ORIGINAL PAPER The Axum–Adwa basalt–trachyte complex: a late magmatic activity at the periphery of the...Abstract The Axum–Adwa igneous complex consists of a basalt–trachyte (syenite) suite emplaced at the northern...activity. 40 Ar/39Ar and K–Ar ages, carried out for the first time on felsic and basaltic rocks, constrain...constrain the magmatic age of the greater part of the complex around Axum to 19–15 Ma, whereas trachytic lavas...trachyte lavas east of Adwa to normative (and modal) nepheline syenite subvolcanic domes (the obelisks stones |  | Sirotkina, Ekaterina A., Bobrov, Andrey V., Spivak, Anna V., Bindi, Luca, Pushcharovsky, Dmitry Yu. (2016) X-ray single-crystal and Raman study of (Na0.86Mg0.14)(Mg0.57Ti0.43)Si2O6, a new pyroxene synthesized at 7 GPa and 1700 °C. Physics and Chemistry of Minerals, 43 (10) 731-738 doi:10.1007/s00269-016-0829-2 | Journal (article/letter/editorial) | | single‑crystal and Raman study of (Na0.86Mg0.14) (Mg0.57Ti0.43)Si2O6, a new pyroxene synthesized at 7 GPa and 1700...at P = 7 GPa and T = 1700 °C, was characterized by X-ray single-crystal diffraction and Raman spectroscopy...853(2)°, V = 430.08(1) Ã…3. The coexistence of Mg and Ti4+ at the M1 site does not induce strong modifications...the first time and compared with that of Mg2Si2O6 (with very low concentrations of Na and Ti). The structural...Russia 119991 2 Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences |  | | Journal (article/letter/editorial) | | Russian Federation Institute of Precambrian Geology and Geochronology, MakaroÕa Emb, 2, St. Petersburg, 199034...discovered Niva agpaitic syenite intrusion is located 50 km southwest of the Khibina complex, central Kola Peninsula...southern bank of the Imandra lake. Rb–Sr Ž379 " 21 Ma. and Sm–Nd Ž383 " 58 Ma. isochron ages of the intrusion...intrusion coincide with the age of the Khibina and Lovozero complexes. A characteristic feature of the Niva...extremely high agpaicity and enrichment in Sr, Ba, Y, Zr, Nb, Rb, LREE, and volatiles. The mineral association |  | | Journal (article/letter/editorial) | | suite, an example of Ediacaran-Cambrian deformed alkaline rocks in the Araguaia Belt, Central Brazil. Implications...Botelho and E.L. Dantas, Monte Santo suite, an example of Ediacaran-Cambrian deformed alkaline rocks in...acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not...will undergo additional copyediting, typesetting and review before it is published in its final form,...may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain |  | | Journal (article/letter/editorial) | | sapphirine and surinamite groups (sapphirine supergroup) E. S. GREW1, U. HAÌŠLENIUS2, M. PASERO3 AND J. BARBIER4...Chemistry, McMaster University, Hamilton, Ontario, Canada L8S 4M1 [Received 3 September 2008; Accepted 13...isostructural with sapphirine-1A, sapphirine-2M, and surinamite are closely related chain silicates that...nomenclature problems because of the large number of sites and potential constituents, including several (Be, B...composed of pyroxene or pyroxene-like and spinel modules, and thus we recommend that the sapphirine supergroup |  | Matrosova, Ekaterina A., Bobrov, Andrey V., Bindi, Luca, Pushcharovsky, Dmitry Yu., Irifune, Tetsuo (2020) Titanium-rich phases in the Earth's transition zone and lower mantle: Evidence from experiments in the system MgO–SiO2–TiO2(±Al2O3) at 10–24 GPa and 1600 °C. Lithos, 366. 105539pp. doi:10.1016/j.lithos.2020.105539 | Journal (article/letter/editorial) | | Titanium-rich phases in the Earth's transition zone and lower mantle: Evidence from experiments in the system...system MgO–SiO2–TiO2(±Al2O3) at 10–24 GPa and 1600 °C Ekaterina A. Matrosova, Andrey V. Bobrov, Luca...Titaniumrich phases in the Earth's transition zone and lower mantle: Evidence from experiments in the system...system MgO–SiO2–TiO2(±Al2O3) at 10–24 GPa and 1600 °C, LITHOS (2020), https://doi.org/10.1016/j.lithos...acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not |  | | Journal (volume) | | L L E T I N 1 9 0 · 2001 The IlÃmaussaq alkaline complex, South Greenland: status of mineralogical...with list of minerals GEOLOGICAL SURVEY OF DENMARK AND GREENLAND MINISTRY OF THE ENVIRONMENT 1 Geology...Greenland Survey Bulletin 190 Keywords Agpaite, alkaline, crystallography, Gardar province, geochemistry...hyper-agpaite, IlÃmaussaq, mineralogy, nepheline syenite, peralkaline, Mesoproterozoic, rare-element minerals...kakortokites in the southern part of the IlÃmaussaq alkaline complex, South Greenland. The central part of the |  | 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) | | James Dwight Dana and Edward Salisbury Dana EIGHTH ENTIRELY REWRITTEN EDITION AND GREATLY ENLARGED ...ROCHESTER ACADEMY OF SCIENCE, ROCHESTER, NEW YORK And with Illustrations by ERIC DOWTY SHAPE SOFTWARE...All rights reserved. Published simultaneously in Canada. Reproduction or translation or any part of this...This publication is designed to provide accurate and authoritative information in regard to the subject...of James Dwight Dana and Edward Salisbury Dana. — 8th ed., entirely rewritten and greatly enl. / by Richard |
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