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schorl

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Journal Article
Published: 28 January 2021
The Canadian Mineralogist (2020) 58 (6): 717–732.
.... The pegmatite has a typical zonal internal structure with a volumetrically significant quartz core and pods of magmatic fluorite. Along with biotite, mostly in the outer units, tourmaline (schorl, fluor-schorl) is common to abundant in most pegmatite units. Accessory minerals include common strongly hematitized...
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Journal Article
Published: 01 September 2020
American Mineralogist (2020) 105 (9): 1436–1440.
...-plateau age of 43 ± 6 Ma. Major element concentrations of tourmaline indicate that both Tur P and Tur G belong to the schorl group with a magmatic origin, but trace elements such as V indicate that they are not cogenetic. Boron isotopes suggest that Tur P (average –9.76‰) was derived from typical crustal...
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Journal Article
Journal: Economic Geology
Published: 18 August 2020
Economic Geology (2020) 115 (8): 1665–1697.
... composition, with Fe/(Fe + Mg) = 0.36 to 0.52, close to the schorl-dravite limit, and relatively high contents (10s to 100s ppm) of Li, K, Mn, light rare earth elements, and Zn. The second generation (Tur 2)—the most important volumetrically—is pre-ore, high-temperature (>500°C), hydrothermal tourmaline...
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Journal Article
Published: 02 June 2020
The Canadian Mineralogist (2020) 58 (3): 381–394.
... tusionite, and schorl. It often grows together with Sc-bearing tusionite and occurs as single columnar crystals ranging from 50 to 400 μm in length, as inclusions in spessartine and tourmaline, and rarely as crystals in blebs along boundaries between garnet, tourmaline, and quartz. Badakhshanite-(Y...
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Journal Article
Published: 13 February 2020
Mineralogical Magazine (2020) 84 (2): 301–311.
...–Karavshinskoye Sn deposit, Turkestan Range, Kyrgyzstan. It occurs as white or pale yellowish rosette-like aggregates that are composed of tiny curved plates up to 20–30 μm. Akopovaite is associated with gibbsite, quartz, albite, microcline, muscovite, montebrasite, siderite, schorl and birnessite-like Fe–Mn...
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Journal Article
Published: 11 November 2019
Mineralogical Magazine (2020) 84 (2): 245–265.
.... Tourmaline formed in three distinct stages with different types of chemical substitution. Tourmaline from the first unmineralised stage is classified as dravite or schorl, which could be enriched locally in Ca, the X -site vacancy and F. This tourmaline is characterised by the Fe ↔ Mg and X vacancy + Al ↔ Na...
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Journal Article
Published: 30 September 2019
The Canadian Mineralogist (2019) 57 (5): 745–747.
... , 113 – 131 . Flégr, T., Cempírek, J., Novák, M., & Filip, J. (2017) Ti-rich schorl to bosiite (?) from the Řečice elbaite-subtype...
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Series: Geological Society, London, Special Publications
Published: 25 September 2019
DOI: 10.1144/SP481-2017-167
EISBN: 9781786204264
... of 3 s per step, and measurement ranges from 2° to 65° 2 θ . Diffraction patterns were fitted, and unit-cell parameters were refined with Bruker DIFFRACplus TOPAS software using the structural model of schorl ( Bosi et al. 2005 : sample L4d). Refined unit-cell parameters allowed the calculation...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 919–928.
... behaviour and to carry out kinetics analysis for Fe-rich tourmaline (schorl). X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetry-Differential Scanning Calorimetry (TG-DSC) were applied to characterize the thermal behaviour. The Friedman, Flynn-Wall-Ozawa, modified...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 20 December 2018
Lithosphere (2019) 11 (1): 91–128.
.... Tourmaline and muscovite are absent in the basal part of the zone, but the intermediate and upper parts include 1 cm schorl prisms and muscovite. Schorl-rich layers occur but are rare in the upper part of the footwall ( Fig. 7 ), and locally the coarse-grained granite is foliated or protoclastic ( Fig. 8...
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Journal Article
Published: 23 October 2018
The Canadian Mineralogist (2018) 56 (4): 425–449.
... are famous for spectacular mineral specimens of schorl, foitite, aquamarine, topaz, fluorite, and jeremejevite. Mineral samples from three areas where artisanal mining exposed miarolitic cavities were examined: Lion's Head (LH), Hohenstein Gorge (HG), and Tubusis (TB). Tourmaline, biotite, and associated...
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Journal Article
Published: 28 February 2018
Mineralogical Magazine (2018) 82 (4): 913–928.
...Adam Pieczka; Andreas Ertl; Mateusz P. Sęk; Diana Twardak; Sylwia Zelek; Eligiusz Szełęg; Gerald Giester ABSTRACT Yellowish dravitic tourmaline (dominated by the oxy-dravite component) associated with secondary fluor-dravite/fluor-schorl and dravite/schorl tourmalines was found in a quartz vein...
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Series: Clay Minerals Society
Published: 01 January 2018
DOI: 10.1346/CMS-WLS-22.8
EISBN: 9781881208495
... Siderite Schorl 1 22.1 19.2 0.0 53.7 3.0 0.5 0.0 1.1 2 25.1 16.9 0.0 53.1 2.2 0.3 0.0 1.5 3 28.8 9.0 0.0 54.7 3.3 0.3 0.5 2.7 4 34.3 5.9 0.0 48.0 5.7 0.7 0.2 4.5 5 20.5 11.4 2.1 60.4 1.3 0.3 0.2 2.9 6 32.4 9.8 0.1 52.2 2.1 0.2 0.1 2.2...
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Journal Article
Published: 01 May 2017
European Journal of Mineralogy (2017) 29 (2): 257–267.
..., and a transversely zoned specimen consisting of small crystals covering the single-crystal main body. The results show that the most abundant tourmaline species are schorl deficient in W-site OH ( W OH) and Y Al-rich schorl that additionally contains minor amounts of Y Mg and/or Y Li. In addition, X Na-rich foitite...
Journal Article
Published: 01 April 2017
American Mineralogist (2017) 102 (4): 876–899.
... and cavities. The tourmalines are mostly schorl (Fe-rich) and foitite, with an average end-member component of schorl 45 dravite 6 tsilaisite 1 uvite 0 Fe-uvite 3 foitite 31 Mg-foitite 4 olenite 10 . Element substitutions of the tourmalines are controlled by FeMg −1 , Y Al X □(R 2+ Na) −1 , and minor Y AlO(R 2...
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Journal Article
Published: 01 May 2016
The Canadian Mineralogist (2016) 54 (3): 661–679.
... basement rocks along the P2 fault: early oxy-schörl [(Na 0.47 □ 0.37 Ca 0.16 )(Fe 2+ 1.30 Al 0.91 Mg 0.72 Ti 0.07 )Al 6 (Si 5.79 Al 0.21 O 18 )(BO 3 ) 3 OH 3 (O 0.63 OH 0.29 F 0.08 ), where □ = vacancy] of metamorphic-anatectic origin, hydrothermal oxy-dravite [(Na 0.57 Ca 0.23 □ 0.18 K 0.02 )(Mg 1.93 Fe 2...
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Journal Article
Published: 01 March 2016
European Journal of Mineralogy (2016) 28 (1): 163–177.
...Andreas Ertl; Uwe Kolitsch; M. Darby Dyar; Hans-Peter Meyer; George R. Rossman; Darrell J. Henry; Markus Prem; Thomas Ludwig; Lutz Nasdala; Christian L. Lengauer; Ekkehart Tillmanns; Gerhard Niedermayr Abstract Fluor-schorl, NaFe 2+ 3 Al 6 Si 6 O 18 (BO 3 ) 3 (OH) 3 F, is a new mineral species...
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Journal Article
Published: 17 November 2015
The Canadian Mineralogist (2015) 53 (3): 571–590.
... likely occurs in arrangements with W OH. §   Corresponding author e-mail address : bacikp@fns.uniba.sk 8 10 2014 21 4 2015 2015 Mineralogical Association of Canada tourmaline supergroup schorl dravite disorder octahedral sites unit-cell parameters bond-lengths bond...
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Journal Article
Published: 01 November 2015
The Canadian Mineralogist (2015) 53 (6): 1035–1048.
... with albite and quartz in the Oldřich pegmatite (distal cookeite type), Dolní Bory-Hatě, Bory pegmatite district, Moldanubian Zone, Czech Republic. The mineral assemblages of the Bory pegmatites with common Al,Fe-rich minerals (annite, schorl, sekaninaite, andalusite, diaspore, ilmenite, and almandine...
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Journal Article
Published: 01 July 2015
American Mineralogist (2015) 100 (7): 1434–1451.
...Renata Čopjaková; Radek Škoda; Michaela Vašinová Galiová; Milan Novák; Jan Cempírek Abstract Primary black thick-prismatic Al-rich schorl to rare fluor-schorl (TurP1), locally overgrown by brownish-green Li-rich fluor-schorl to fluor-elbaite (TurP2) from the Kracovice pegmatite (mixed NYF+LCT...
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