 | | Journal (article/letter/editorial) | | LCT-SUITE PEGMATITE WITH LATE-STAGE SODIUM ENRICHMENT, BRAZIL LAKE, YARMOUTH COUNTY, NOVA SCOTIA. I. GEOLOGICAL...J. KONTAKĀ§ Nova Scotia Department of Natural Resources, P.O. Box 698, Halifax, Nova Scotia B3J 2T9, Canada...Canada Abstract The Brazil Lake pegmatite, in Yarmouth County, Nova Scotia, enriched in Li, Ta and Rb...conforms to the LCT-suite classification. The pegmatite group, dominated by two subvertical sheets, is...395 Ma for the pegmatite equates to an amagmatic event in this part of southern Nova Scotia, but given its |  | Bradley, Dwight, Shea, Erin, Buchwaldt, Robert, Bowring, Sam, Benowitz, Jeff, O'Sullivan, Paul, McCauley, Andrew (2016) Geochronology and Tectonic Context of Lithium-Cesium-Tantalum Pegmatites In the Appalachians. The Canadian Mineralogist, 54 (4) 945-969 doi:10.3749/canmin.1600035 | Journal (article/letter/editorial) | | along the Appalachian orogen from Alabama to Nova Scotia. We report new U-Pb zircon (CA-TIMS), 40Ar/39Ar...From oldest to youngest, these are: (1) Brazil Lake, Nova Scotia, dated at ca. 395 (U-Pb columbite) by...component. Thus a set of zircon ages from an LCT pegmatite must be treated as analogous to detrital zircon...Keywords: pegmatite, Geochronology, Appalachian orogen, tectonics, lithium-cesium-tantalum pegmatite, nio...niobium-yttrium-ļ¬uorine pegmatite. INTRODUCTION Lithium-cesium-tantalum (or LCT) pegmatites are a widespread |  | | Journal (article/letter/editorial) | | 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...(1907) determined U-Pb ages for uraninite from two pegmatite districts in Connecticut. Over the past 40 years |  | | Journal (article/letter/editorial) | | Richmond Street North, London, Ontario N6A 5B7, Canada Department of Geological Sciences, University of...Building, 125 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada 2 Abstract Niobium and tantalum, rare metals...Nb-Ta mineralization has also been proposed for pegmatite-hosted deposits such as Tanco, Greenbushes, and...fluid-melt interactions in rare metal granites and pegmatite deposits may be more widespread than previously...Keywords: Experimental petrology, rare metals, pegmatite, niobium, fluid-melt interactions Introduction |  | | Journal (article/letter/editorial) | | statistical analysis applied to rare-element LCT-type pegmatite fields: an original approach to constrain faultsā...emplacement of LCT-type (LithiumāCesiumāTantalum) pegmatite fields and their relationships with host rocks...quantify both i) the spatial distribution of the pegmatite occurrences, including their grouping/ scattering...NNE trending faults family; with 50 % of the pegmatite occurrences located less than 500 m away from...out a lack of spatial link between each of the pegmatite subtypes and several potential granitic sources |  | 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) | | rare-element pegmatites, belonging to different pegmatite fields, have been obtained by the LAāSFāICPāMS...exhumation of high-pressure rocks. Keywords: LCT pegmatite, rare-element-enriched magma, columbiteātantalite...lāexhumation des roches de haute pression. Mots-clĆ©s: pegmatite LCT, magmatisme Ć Ć©lĆ©ments rares, datation sur...ideally suited for UāPb dating of rare-element pegmatite. They can easily accept U into their structure...from ~1 m to up to 35 m in thickness. All the pegmatite bodies studied are located in the Moldanubian |  | Che, Xu-Dong, Wu, Fu-Yuan, Wang, Ru-Cheng, Gerdes, Axel, Ji, Wei-Qiang, Zhao, Zhen-Hua, Yang, Jin-Hui, Zhu, Ze-Ying (2015) In situ UāPb isotopic dating of columbiteātantalite by LAāICPāMS. Ore Geology Reviews, 65. 979-989 doi:10.1016/j.oregeorev.2014.07.008 | Journal (article/letter/editorial) | | LAāICPāMS Matrix effect Nanping pegmatite Altai No.3 pegmatite Dahe pegmatite Yichun a b s t r a c t Columbiteātantalite...commonly occurring in rare metal granite and pegmatite, alkaline granite, syenite and carbonatite. Its...Namibia (Coltan139), the coltan sample from Dahe pegmatite (SNNT) has a weighted mean 206Pb/238U age of 363...respectively; the coltan samples from Altai No.3 pegmatite (713-79), Yichun topaz-lepidolite granite (Yi-1)...established analytical protocol, we date the Nanping pegmatite (NP155), a main NbāTa deposit in China without |  | | Journal (article/letter/editorial) | | amphibolite facies metasedimentary rocks (Nova Scotia). Only in Maritime Canada Au mineralization is related to...(Pardee and Park, 1948). 2.2 New Brunswick, Nova Scotia, and Newfoundland The northern Appalachian belt...includes the occurrences of Poplar Mountain and Lake George (Yang et al., 2002; Chi et al., 2008). At...volcanic unit (Chi et al., 2008). Mineralization at Lake George has been mainly known for quartz-Sb and quartz-calcite-W-Mo...sedimentary rocks of the Meguma Supergroup (Nova Scotia) host numerous quartz-Au vein-type mineralization |  | Ballouard, Christophe, Elburg, Marlina A., Tappe, Sebastian, Reinke, Christian, Ueckermann, Henriette, Doggart, Shane (2020) Magmatic-hydrothermal evolution of rare metal pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa) Ore Geology Reviews, 116. 103252 doi:10.1016/j.oregeorev.2019.103252 | Journal (article/letter/editorial) | | pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa) Christophe Ballouard...pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa), Ore Geology...pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa) Authors: Christophe...geochronology Abstract The 450 km long Orange River pegmatite belt intruded the Namaqua Sector of the Mesoproterozoic...Kokerboomrand I pegmatite emplaced at ca. 985 Ma during the main stage of pegmatite emplacement in the |  | | Thesis/Dissertation | | regular NYF-type pegmatites from the Namaqualand pegmatite belt, Northern Cape, South Africa by Minenhle...Johannesburg NOVEMBER 2020 Supervisor: Prof. M. A Elburg Co-supervisor: Dr. C Ballouard ACKNOWLEDGEMENTS I...never unnoticed and for that, I thank you. To my co-supervisor, Dr. Christophe Ballouard, thank you for...40-50 km wide Namaqualand pegmatite belt, synonymous with the Orange River pegmatite belt (ORPB), consists...consists of the Witkop, Koegab and Sidi-Barrani pegmatite-1 complex pegmatites which were emplaced at 985 |  | | Journal (article/letter/editorial) | | Keywords Jo ur Anatexis, rare metal, rare earth, pegmatite, Chinese Altai 1. Introduction Granitic pegmatites...et al., 2012a; London, 2018). In some cases, a pegmatite can be linked to its parental granite according...differentiation of granitic melts and the emplacement of pegmatite-forming melts are still unclear. Recent studies...proved that other than fractional crystallization, pegmatite formation can involve other mechanisms, such as...2017; Simmons and Falster, 2016). The study of pegmatite petrogenesis is crucial from a scientific prospective |
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