Matches in SemOpenAlex for { <https://semopenalex.org/work/W2899151302> ?p ?o ?g. }
- W2899151302 endingPage "602" @default.
- W2899151302 startingPage "555" @default.
- W2899151302 abstract "Research Article| October 23, 2018 Anatectic Granitic Pegmatites from the Eastern Alps: A Case of Variable Rare-Metal Enrichment During High-Grade Regional Metamorphism – I: Mineral Assemblages, Geochemical Characteristics, and Emplacement Ages Jürgen Konzett; Jürgen Konzett Institute of Mineralogy and Petrology, University of Innsbruck, Innrain 52 A-6020 Innsbruck, Austria Search for other works by this author on: GSW Google Scholar Tobias Schneider; Tobias Schneider Institute of Mineralogy and Petrology, University of Innsbruck, Innrain 52 A-6020 Innsbruck, Austria Search for other works by this author on: GSW Google Scholar Latina Nedyalkova; Latina Nedyalkova Institute of Mineralogy and Petrology, University of Innsbruck, Innrain 52 A-6020 Innsbruck, Austria Search for other works by this author on: GSW Google Scholar Christoph Hauzenberger; Christoph Hauzenberger Department of Earth Sciences, University of Graz, Universitätsplatz 2, A-8010 Graz, Austria Search for other works by this author on: GSW Google Scholar Frank Melcher; Frank Melcher Chair of Geology and Economic Geology, Montanuniversität Leoben, Peter-Tunnerstrasse 5, A-8700 Leoben Search for other works by this author on: GSW Google Scholar Axel Gerdes; Axel Gerdes Institute of Geosciences, Mineralogy, Goethe University Frankfurt, Altenhöferallee 1, D-60438 Frankfurt/Main Search for other works by this author on: GSW Google Scholar Martin Whitehouse Martin Whitehouse Swedish Museum of Natural History, Frescativägen 40, 11418 Stockholm, Sweden Search for other works by this author on: GSW Google Scholar Author and Article Information Jürgen Konzett Institute of Mineralogy and Petrology, University of Innsbruck, Innrain 52 A-6020 Innsbruck, Austria Tobias Schneider Institute of Mineralogy and Petrology, University of Innsbruck, Innrain 52 A-6020 Innsbruck, Austria Latina Nedyalkova Institute of Mineralogy and Petrology, University of Innsbruck, Innrain 52 A-6020 Innsbruck, Austria Christoph Hauzenberger Department of Earth Sciences, University of Graz, Universitätsplatz 2, A-8010 Graz, Austria Frank Melcher Chair of Geology and Economic Geology, Montanuniversität Leoben, Peter-Tunnerstrasse 5, A-8700 Leoben Axel Gerdes Institute of Geosciences, Mineralogy, Goethe University Frankfurt, Altenhöferallee 1, D-60438 Frankfurt/Main Martin Whitehouse Swedish Museum of Natural History, Frescativägen 40, 11418 Stockholm, Sweden § Corresponding author e-mail address: juergen.konzett@uibk.ac.at Publisher: Mineralogical Association of Canada First Online: 23 Oct 2018 Online Issn: 1499-1276 Print Issn: 0008-4476 © 2018 Mineralogical Association of Canada The Canadian Mineralogist (2018) 56 (4): 555–602. https://doi.org/10.3749/canmin.1800008 Article history First Online: 23 Oct 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jürgen Konzett, Tobias Schneider, Latina Nedyalkova, Christoph Hauzenberger, Frank Melcher, Axel Gerdes, Martin Whitehouse; Anatectic Granitic Pegmatites from the Eastern Alps: A Case of Variable Rare-Metal Enrichment During High-Grade Regional Metamorphism – I: Mineral Assemblages, Geochemical Characteristics, and Emplacement Ages. The Canadian Mineralogist 2018;; 56 (4): 555–602. doi: https://doi.org/10.3749/canmin.1800008 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyThe Canadian Mineralogist Search Advanced Search Abstract Granitic pegmatites are present within a small pegmatite field as concordant decimeter- to meter-sized dikes or small stocks emplaced in amphibolite-facies metapelitic gneisses or marbles of the Eastern Alpine crystalline basement in Northern Italy. Five of these pegmatites were investigated and show simple major phase assemblages (quartz-albite-muscovite-paragonite, quartz-plagioclase-muscovite, and quartz-K-feldspar-plagioclase-muscovite) together with minor beryl, garnet, or tourmaline. In addition, accessory phase assemblages of variable complexity are present involving chrysoberyl, cordierite, Nb-Ta-Sn-Ti oxides, zircon, and magmatic phosphate minerals. Two pegmatites have staurolite as inclusions in large beryl crystals and/or as a groundmass phase. Muscovite replacement textures indicate that paragonite is not a primary magmatic phase but a metasomatic phase. All pegmatites show tourmaline-rich reaction zones along their contacts with the country rocks. If present, columbite-group phases (CGP) are the major rare-metal-bearing phases and are present in several textural types. They show a range in XMn and XTa of 0.4–72.9 and 8.5–86.9, respectively. A significant portion of the CGP analyses yields values <20 and many CGP grains show a core-to-rim decrease in XMn, however without any systematic zoning in XTa. Amongst the minor elements in the CGPs, high MgO contents of up to 1.0 wt.% MgO are noteworthy. Four possible causes of the mineralogical diversity of the pegmatites are proposed: (1) the degree of fractionation and ASI of the pegmatite parent melts, (2) a variable Na-metasomatic overprint of the primary pegmatite assemblages, (3) the nature of the Fe-Mn phases and their relative timing of crystallization, and (4) the nature of the pegmatite country rocks. The geochemical signature of the pegmatites is characterized by an enrichment in Be-Nb > Ta-Sn combined with very low Li-F-Y-REE, resulting in the absence of any F- and Li-saturated phases and very low Li- and F-contents in all major pegmatite silicates. Laser ablation ICP-MS U-Pb dating of cassiterite from the most highly fractionated pegmatite yielded a tightly constrained age of 289 ± 5 Ma, whereas U-Pb dating of CGPs from the same pegmatite produced a large age spread in the range 70 ± 4 to 172 ± 3 Ma. Additional SIMS U-Pb dating of Nb-Ta-Sn rich titanites from a reaction zone between a further pegmatite and calcite marble yielded ages in the range 224 ± 12 to 242 ± 8 Ma. The cassiterite ages indicate a pegmatite emplacement during the Permian high-T/low-P metamorphic event, the latter affecting large portions of the Eastern Alpine basement through widespread partial melting of the crust as a result of lithospheric thinning. The range in CGP ages can be explained with a resetting of the U-Pb system during an Eoalpine amphibolite-facies metamorphic overprint at ∼80–100 Ma. The titanite ages are also consistent with an Eoalpine resetting, but a later emplacement of the pegmatite during an extended period of Permo-Triassic pegmatite formation cannot be ruled out. Geochemical enrichment patterns as well as mineral assemblages, the tectono-metamorphic environment of pegmatite emplacement, and a lack of suitable intrusive parent bodies are consistent with an anatectic origin of the investigated pegmatites. We further propose anatectic parent melt formation as the major mechanism for pegmatite genesis in all parts of the Eastern Alpine basement affected by Permo-Triassic metamorphism. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
- W2899151302 created "2018-11-09" @default.
- W2899151302 creator A5021103666 @default.
- W2899151302 creator A5030081327 @default.
- W2899151302 creator A5045297384 @default.
- W2899151302 creator A5050225573 @default.
- W2899151302 creator A5068579961 @default.
- W2899151302 creator A5069005075 @default.
- W2899151302 creator A5084100861 @default.
- W2899151302 date "2018-10-23" @default.
- W2899151302 modified "2023-10-13" @default.
- W2899151302 title "Anatectic Granitic Pegmatites from the Eastern Alps: A Case of Variable Rare-Metal Enrichment During High-Grade Regional Metamorphism – I: Mineral Assemblages, Geochemical Characteristics, and Emplacement Ages" @default.
- W2899151302 cites W1665630859 @default.
- W2899151302 cites W1935496938 @default.
- W2899151302 cites W1966187796 @default.
- W2899151302 cites W1968781417 @default.
- W2899151302 cites W1969859799 @default.
- W2899151302 cites W1979465971 @default.
- W2899151302 cites W1979858810 @default.
- W2899151302 cites W1980398478 @default.
- W2899151302 cites W1981398171 @default.
- W2899151302 cites W1982925963 @default.
- W2899151302 cites W1987348854 @default.
- W2899151302 cites W1997912720 @default.
- W2899151302 cites W2000703556 @default.
- W2899151302 cites W2004304960 @default.
- W2899151302 cites W2006766138 @default.
- W2899151302 cites W2007105153 @default.
- W2899151302 cites W2008442425 @default.
- W2899151302 cites W2011030468 @default.
- W2899151302 cites W2018543071 @default.
- W2899151302 cites W2028312206 @default.
- W2899151302 cites W2029082284 @default.
- W2899151302 cites W2030745829 @default.
- W2899151302 cites W2035678458 @default.
- W2899151302 cites W2037775252 @default.
- W2899151302 cites W2050548305 @default.
- W2899151302 cites W2051483687 @default.
- W2899151302 cites W2053014251 @default.
- W2899151302 cites W2057078600 @default.
- W2899151302 cites W2057216089 @default.
- W2899151302 cites W2059356468 @default.
- W2899151302 cites W2059838702 @default.
- W2899151302 cites W2065226787 @default.
- W2899151302 cites W2066474597 @default.
- W2899151302 cites W2068242805 @default.
- W2899151302 cites W2068614010 @default.
- W2899151302 cites W2068705742 @default.
- W2899151302 cites W2082489723 @default.
- W2899151302 cites W2083561581 @default.
- W2899151302 cites W2085787749 @default.
- W2899151302 cites W2089320733 @default.
- W2899151302 cites W2092582444 @default.
- W2899151302 cites W2094163850 @default.
- W2899151302 cites W2096328759 @default.
- W2899151302 cites W2108886178 @default.
- W2899151302 cites W2115918806 @default.
- W2899151302 cites W2116852150 @default.
- W2899151302 cites W2132593853 @default.
- W2899151302 cites W2155190247 @default.
- W2899151302 cites W2169499130 @default.
- W2899151302 cites W2184384627 @default.
- W2899151302 cites W2265785394 @default.
- W2899151302 cites W2314613853 @default.
- W2899151302 cites W2321951302 @default.
- W2899151302 cites W2324957784 @default.
- W2899151302 cites W2327687302 @default.
- W2899151302 cites W2329222712 @default.
- W2899151302 cites W2330277443 @default.
- W2899151302 cites W2588674838 @default.
- W2899151302 cites W2602739244 @default.
- W2899151302 cites W3007472047 @default.
- W2899151302 cites W4241653997 @default.
- W2899151302 cites W2091712847 @default.
- W2899151302 doi "https://doi.org/10.3749/canmin.1800008" @default.
- W2899151302 hasPublicationYear "2018" @default.
- W2899151302 type Work @default.
- W2899151302 sameAs 2899151302 @default.
- W2899151302 citedByCount "24" @default.
- W2899151302 countsByYear W28991513022018 @default.
- W2899151302 countsByYear W28991513022019 @default.
- W2899151302 countsByYear W28991513022020 @default.
- W2899151302 countsByYear W28991513022021 @default.
- W2899151302 countsByYear W28991513022022 @default.
- W2899151302 countsByYear W28991513022023 @default.
- W2899151302 crossrefType "journal-article" @default.
- W2899151302 hasAuthorship W2899151302A5021103666 @default.
- W2899151302 hasAuthorship W2899151302A5030081327 @default.
- W2899151302 hasAuthorship W2899151302A5045297384 @default.
- W2899151302 hasAuthorship W2899151302A5050225573 @default.
- W2899151302 hasAuthorship W2899151302A5068579961 @default.
- W2899151302 hasAuthorship W2899151302A5069005075 @default.
- W2899151302 hasAuthorship W2899151302A5084100861 @default.
- W2899151302 hasConcept C112764850 @default.
- W2899151302 hasConcept C127313418 @default.
- W2899151302 hasConcept C17409809 @default.
- W2899151302 hasConcept C178790620 @default.
- W2899151302 hasConcept C185592680 @default.