 | 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) | | columbite. Two ages of emplacement have been obtained. An older episode at ~333 ± 3 Ma follows closely the...generally contains very high U contents that lead to an advanced metamictization. Consequently, columbite...mineralogist 2) the Teplá–Barrandian domain, interpreted as an independent crustal block and composed of a Neoproterozoic...domain, representing a Neoproterozoic basement with an Early to Late Paleozoic cover. Granitic pegmatites...body (Novák & Selway 1997). At the old Hradisko quarry (sample site), the internal structure is concentric |  | 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) | | minerals. The intergrowth occurs within amblygonite/montebrasite nodules near the quartz core of the highly fractionated...between the lamellae. Textural relations suggest an exsolution origin for the lamellae. Manganotantalite...ferrotapiolite, bismuth, apatite, amblygonite-montebrasite, subsolidus replacement. Introduction TANTALUM...that the microlite is embedded in amblygonite-montebrasite (Li,Na)AlPO4(OH,F) characterizes this rare mineralogical...hypotheses concerning the origin of the intergrowth: (1) an exsolution texture of the lamellae in microlite; |  | | Journal (article/letter/editorial) | | I56; see also alkali feldspar. ALIEV (R. M.), see KASHKAI(M.-A.), 929. Alkali feldspar, variation of ~o~...distinction from montebrasite, 4r4. Amblygonite mine, Caceres, Spain, montebrasite, 414. Amelia County...BURCESS (A. S.), Computerized data processing from an X-ray texture goniometer, 428. Aucoa~r (J. W.) and...silicate studies, 198. Bikita mines, Rhodesia, montebrasite, 414. Bimbowrie, South Australia, cobaltite...anal., d2o T, 489. Black Hills, South Dakota, montebrasite, 414. Blanket Bay, Cuvier Id., New Zealand, |  | | Journal (article/letter/editorial) | | amblygonite, 414. Drachenfels, Pfalz, alkali feldspar, 489. Dreiser Weiher, Eifel, spinel-lherzolite...Upnor, Kent. Cornwall Bosahan quarry, Falmoath, biotite, 21o. Dean quarry, Coverack, The Lizard, analcime...Loch Don, Mull, plumbogummite group, 935. Loch Feith an Leothaid, Loehinver, augite, bronzitc, t ~5Loyne...omphacite, 61. Slieve Gullion, Armagh, alkali feldspar, 489. France Le Puy, IIaute-Loire, spinel-lherzolite...xenoliths, 726. Montebras, Creuse, amblygonite, montebrasite, 414. Orpierre, IIautes-Alpes, blende, 153. |  | | Journal (article/letter/editorial) | | exploration. Thispaperfocuses onthe occurrence In an assessment crystallization, Heinrich (1965) cited...Alteration of mafic wall rocksto holmquistite district,Zimbabwe,and suggested that holmquistite occursduringthe...Burt, 1982; Trueman and mulationsof amblygonite-montebrasite or lepidolite- •ern•, 1982).Notsince thepublications...Uto, Sweden Osann (1913), Sundius(1947) Carinthia, Austria Goed (1978) posit took place at greenschistfacies...1986a). Amphiboliteson the hangingwall abovethe main quarry experiencedthe potassicmetasomatism describedabove |  | | Journal (article/letter/editorial) | | Ankerite, Germany, thermal decomposition of, 138. An]~ole, Uganda, schorlomite, 775. Anorthite, Japan...meteorites, 726; cutting of, 742. BENJAMIN (R. K.), An axinite-epidote- tourmaline vein cutting amphibolite...western Connemara, Eire, 747. Benson, Rhodesia, montebrasite, microbite, tantalite, topaz, hafnian zircon...hausmannite, 976. Bikita, Rhodesia, manganoan apatite, montebrasite, formanite, topaz, rubellite, 50. Billygoat...Valais, Switzerland, hyalophane, 914. BI~NS (R. A.), An exceptionally large chondru]e in the ParnaUee meteorite |  | Van Lichtervelde, M., Salvi, S., Beziat, D., Linnen, R. L. (2007) Textural Features and Chemical Evolution in Tantalum Oxides: Magmatic Versus Hydrothermal Origins for Ta Mineralization in the Tanco Lower Pegmatite, Manitoba, Canada. Economic Geology, 102 (2) 257-276 doi:10.2113/gsecongeo.102.2.257 | Journal (article/letter/editorial) | | associations and compositions. The Tanco Lower pegmatite is an isolated body beneath the main pegmatite body that...than hydrothermal in origin. Fluids are attributed an indirect role only, as they could have brought minor...hydrothermal fluid, that reacted with the blocky K-feldspar of the central zone. During the alteration event...evolution of columbite group minerals associated with an aplite-hosted style of mineralization, which was...crystallization from a melt or hydrothermal processes. M an On itob ta a rio 258 150 m mine openings pegmatite |  | | Journal (article/letter/editorial) | | anti Petrology © Springer-Verlag 1995 Printed in Austria Elbaite pegmatites in the Moldanubicum: a new...graphic unit to local pods of blocky K-feldspar. Patches of an albitic unit are associated with the blocky...micas is typical. Tourmaline (schorl to elbaite) is an omnipresent subordinate to accessory phase. Elbaite...Subtyp der Selten-Element Pegmatite Um Pegmatite zu kennzeichen, in denen Li haupts~ichlich an Li-fiihrende...Nestern mit blockigem K-Feldspar. Albit-reiche Zonen die sich im zentralen Teil der Pegmatitg~inge entwickelten |  | | Journal (volume) | | Partial analyses of different varieties of potash feldspar, beryl and columbite are presented. From the Hunnakko...Hunnakko pegmatite mineralogical description of montebrasite, alluaudite, triploidite, childrenite and v...analysis, physical properties and X-ray data for montebrasite and alluaudite are presented. Hel sinki 1966......... .. ..... . ... . ................... Montebrasite ......................................... ....Alaveteli, Central Pohjanmaa. Representatives of quite an exceptional type, however, are the Pyörönmaa (Vorma |  | | Journal (article/letter/editorial) | | minerals Review Lithium Occurrence in Italy—An Overview Andrea Dini 1 , Pierfranco Lattanzi 2 , Giovanni...Ruggieri, G.; Trumpy, E. Lithium Occurrence in Italy—An Overview. Keywords: lithium; Italy; geothermal fluids...Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and...additionoftolepidolite the classic spodumene ores, (e.g., montebrasite and lithiophilite), and on their zinnwaldite-rich...lepidolite and zones [9]. phosphates (e.g., montebrasite and lithiophilite), and on their zinnwaldite-rich |  | | Journal (article/letter/editorial) | | number of pegmatites In the Middletown, Connecticut district indicates that there is a general trend, or more...crystallization of these minerals as found in this district. This sequence of deposition appears to be valid...have been collected from the pegmatites of this district which show to advantage the minerals of both the...recent years, and the opportunity for collecting an extensive suite of both the early period and late...pegmatite was readily available. Location The Walden Quarry, or Walden Gem Mine, as it is most commonly known |  | | Journal (article/letter/editorial) | | Mineralogy Pe o logy © Springer-Verlag 1996 Printed in Austria Tourmalinites and Sn-Li mineralization in the...granite. Field and textural relationships document an epigenetic character for the tourmalinites. The tourmaline...veins containing quartz, muscovite, amblygonite-montebrasite, apatite, fluorite, and/or cassiterite appear...geringe Mengen an Arsenkies fiihren, kommen in der N/ihe yon Cficeres, Spanien, vor. Sie sind an ordovizische...ordovizische Metapelite in der N/ihe des Cabeza de Araya Batholiths und kleinere tektonisierte Granitk6rper gebunden |  | | Journal (article/letter/editorial) | | Clays and Clay Minerals 25:95–104. A New Look at An Old Locality: The Chickering Mine in Walpole, NEW...one end will be a triplet and the other end will be an untwinned plate of phlogopite. If it cleaves as shown...metamorphism while solidly encased in calcite rather than in an open space. They would seem to represent elongation...Chickering mine is located in the Keene pegmatite district of southwestern New Hampshire. Recognized as one...Chickering is an important locality. The pegmatite was mined for potassic feldspar for an unknown period |  | | Journal (article/letter/editorial) | | 103–108, 2014 LETTER Secondary phosphates in montebrasite and amblygonite from Nagatare, Fukuoka Prefecture...University, Fukuoka 812–8581, Japan Montebrasite and amblygonite in an Li–Cs–Ta enriched (LCT) pegmatite...composition planes of polysynthetic twins in the montebrasite and amblygonite. Lacroixite has a different...suggests a possibility of exsolution within montebrasite–amblygonite series. Various secondary phosphates...formation of low–F montebrasite from montebrasite–amblygonite series indicates an F–OH exchange. However |  | | Book (volume) | | publisher. Cover photograph: Fluorapatite, Pulsifer quarry, Auburn, Maine (2.2 cm specimen), Harvard Mineralogical...director. As a scholar of mineralogy, he has been an indefatigable researcher and collector of mining...difficulty of obtaining the source material, which an inquiring reader would want to read, but also with...the facts presented here were not the figment of an active imagination. The great number of historical...authors' visiting the locations described. Mineralogy is an enjoyable branch of natural history which has taken |  | | Book | | HagendorfPleystein Province: the Center of Pegmatites in an Ensialic Orogen Modern Approaches in Solid Earth...Hagendorf-Pleystein Province: the Center of Pegmatites in an Ensialic Orogen Harald G. Dill Gottfried-Wilhelm-Leibniz...did not postpone my questions. I did not receive an answer from him, he provided me with a solution....major constituents the three rock-forming minerals feldspar, quartz and mica, which in places develop mega-crystals...share of raw material extracted from pegmatites is feldspar, quartz and mica, and only a tiny fraction of |  | | Journal (article/letter/editorial) | | however, the freshly bulldozed dump material provided an unexpected collecting opportunity. It was the discovery...micro-sized apatite to discoveries of childrenite and an occasional wardite microcrystal. Gradually we added...walls and boulders. Little by little we came to find an even greater variety of phosphate minerals: messelite...its abundant feldspar. As were so many of the early pegmatite mines, it was probably an intermittent...1945, it included a parcel that “contained an abandoned feldspar mine that ceased operation in the mid-1920s” |  | | Journal (article/letter/editorial) | | Mineralogy Petrology © Springer-Verlag 1995 Printed in Austria Compositional and textural evolution of pollucite...pegmatites at Sugice and V~nfi.. At the latter locality, an extremely steep fractionation gradient generates...dem Gebiet der Tschechischen Republik liegen: Sugice III (Elbait-Subtyp), Novfi Ves in der N/ihe von (...Czech Republic 38 D.K. Teertstra et al. Spektrum an prim/irer Zusammensetzung mit CRK = 100 (Cs + Rb...i ")f~_, _ ~ '~ ~+(~.~.~_ _i ^ ~ l "'"- Austria ..... . ,... ,. .... ,;.' I Fig. 1. Location |  | | Journal (article/letter/editorial) | | Vol. 44, pp. 563-598 (2006) NATURE AND ORIGIN OF AN LCT-SUITE PEGMATITE WITH LATE-STAGE SODIUM ENRICHMENT...minimum age of 395 Ma for the pegmatite equates to an amagmatic event in this part of southern Nova Scotia...focus of study, is dominated by spodumene and K-feldspar megacrysts (1–2 m) with intergranular spodumene...spodumene – muscovite – albite – quartz and rare K-feldspar. The megacrysts are generally oriented perpendicular...to the contact, and there is a notable absence of an aplite wall-zone, quartz-rich core, and miarolitic |  | Galliski, M. A., Cerny, P., Marquez-Zavalia, M. F., Chapman, R. (2012) An association of secondary Al-Li-Be-Ca-Sr phosphates in the San Elias pegmatite, San Luis, Argentina. The Canadian Mineralogist, 50 (4) 933-942 doi:10.3749/canmin.50.4.933 | Journal (article/letter/editorial) | | pp. 933-942 (2012) DOI : 10.3749/canmin.50.4.933 AN ASSOCIATION OF SECONDARY Al–Li–Be–Ca–Sr PHOSPHATES...dendritic montebrasite in its northern part and lepidolite in the south. This dendritic montebrasite survived...virtually intact, but subrectangular blocks of montebrasite along the margins of quartz core were extensively...three stages: (i) two generations of secondary montebrasite intimately intergrown with hydroxylherderite...still lower T, the remainder of the primary montebrasite and all of its alteration products were subject |  | | Journal (article/letter/editorial) | | you will find the mine (quarry). Please close all gates after you. This quarry is the newest of the lithium...minerals only present in this type of pegmatite. The quarry was opened up early in 1962 by two young miners...also occurs quite commonly in lithium pegmatites as an impurity in caesium beryl and also along with rubidium...zone into which a number of the pegmatites of the district have been intruded. The metamorphic rocks, the...generally considered to be of Paleozoic age. The Walden quarry is located in a lenticular body of pegmatite. It |  | | Journal (issue) | | already. The occasional faceted stone will show up in an illustration here and there, but we are still the...] 328 Famous mineral localities: the Pulsifer quarry (by W. E. Wilson) [1977, vol. 8, no. 2, p. 72-77...localities: the Himalaya dike system, Mesa Grande district, California (by E. E. Foord) [1977, vol. 8, no...Lowell) [1982, vol. 13, no. 1, p. 19-28.] The Jensen quarry, Riverside County, California (by F. DeVito and...three-dimensional model of a tourmaline crystal, an impossible tourmaline crystal that is, zoned with |  | Rao, Can, Wang, Rucheng, Yang, Yueqing, Hatert, Frédéric, Xia, Qunke, Yue, Xuege, Wang, Wumengyu (2017) Insights into post-magmatic metasomatism and Li circulation in granitic systems from phosphate minerals of the Nanping No. 31 pegmatite (SE China) Ore Geology Reviews, 91. 864-876 doi:10.1016/j.oregeorev.2017.08.017 | Journal (article/letter/editorial) | | 1016/j.oregeorev.2017.08.017 This is a PDF file of an unedited manuscript that has been accepted for publication...and then to triphylite and montebrasite, with large amounts of montebrasite in the intermediate zones...both Li and P in peraluminous granitic melts. Montebrasite experienced stages of both high-temperature...high-temperature hydrothermal alteration of montebrasite by Fe- and Mg-rich fluids resulted in the formation...Fe-, Mg-bearing phosphates; the replacement of montebrasite under low-temperature alteration generated amounts |  | Michaud, Julie Anne-Sophie, Gumiaux, Charles, Pichavant, Michel, Gloaguen, Eric, Marcoux, Eric (2020) From magmatic to hydrothermal Sn-Li-(Nb-Ta-W) mineralization: The Argemela area (central Portugal) Ore Geology Reviews, 116. 103215 doi:10.1016/j.oregeorev.2019.103215 | Journal (article/letter/editorial) | | 1016/j.oregeorev.2019.103215 This is a PDF file of an article that has undergone enhancements after acceptance...Argemela (CA). Disseminated mineralization includes montebrasite, cassiterite and columbite-tantalite dispersed...intragranitic veins with montebrasite in the two earliest and montebrasite, wolframite, cassiterite and...rock veins include a swarm of cassiterite and montebrasite veins (AM) and rare isolated wolframite veins...is very well exposed in a 120 x 80 m operating quarry at the top of the Argemela hill. It is noteworthy |  | | Journal (article/letter/editorial) | | Yangtze Craton in east central China. In the skarn an occurrence of chalcopyrite was mined starting in...that have not previously been reported. The Gole quarry, approximately 80 kilometers north of Bancroft...euxenite-(Y) crystals. In 1978, coauthor Ramik collected an unusual greenish-yellow mineral there that he was...positive identification of kamotoite-(Y) from the Gole quarry was confirmed. In 1999, coauthor Fodi found some...granite quarry is located approximately 0.4 kilometer west of the Ladick East (or Charneski) quarry in the |
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