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quartzites (1)
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upper Precambrian
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Titanite and polycrase
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Journal Article
MINERAL CHEMISTRY AND SHRIMP U–Pb GEOCHRONOLOGY OF MESOPROTEROZOIC POLYCRASE–TITANITE VEINS IN THE SULLIVAN Pb–Zn–Ag DEPOSIT, BRITISH COLUMBIA
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 April 2008
The Canadian Mineralogist (2008) 46 (2): 361–378.
...John F. Slack; John N. Aleinikoff; Harvey E. Belkin; C. Mark Fanning; Paul W. Ransom Abstract Small polycrase–titanite veins 0.1–2 mm thick cut the tourmalinite feeder zone in the deep footwall of the Sullivan Pb–Zn– Ag deposit, southeastern British Columbia. Unaltered, euhedral crystals...
Journal Article
Crystallography of some Canadian minerals. albite, titanite, scapolite and polycrase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 1919
American Mineralogist (1919) 4 (2): 11–13.
Image
SEM images showing locations of SHRIMP analytical spots and U–Pb ages of re...
in MINERAL CHEMISTRY AND SHRIMP U–Pb GEOCHRONOLOGY OF MESOPROTEROZOIC POLYCRASE–TITANITE VEINS IN THE SULLIVAN Pb–Zn–Ag DEPOSIT, BRITISH COLUMBIA
> The Canadian Mineralogist
Published: 01 April 2008
F ig . 7. SEM images showing locations of SHRIMP analytical spots and U–Pb ages of representative grains of polycrase and titanite from the Sullivan deposit. A. BSE image of polycrase grain with subtle compositional zoning. B. BSE image of complex grain of polycrase partly replaced by titanite
Image
Scanning electron micrographs (all back-scattered electron images) of unalt...
in MINERAL CHEMISTRY AND SHRIMP U–Pb GEOCHRONOLOGY OF MESOPROTEROZOIC POLYCRASE–TITANITE VEINS IN THE SULLIVAN Pb–Zn–Ag DEPOSIT, BRITISH COLUMBIA
> The Canadian Mineralogist
Published: 01 April 2008
F ig . 2. Scanning electron micrographs (all back-scattered electron images) of unaltered and altered assemblages in polycrase– titanite veins. A. Coarse unaltered polycrase replaced internally and marginally by titanite. B. Unaltered polycrase intergrown with euhedral titanite replaced
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SHRIMP 207 Pb/ 206 Pb ages obtained on grains of unaltered and altered pol...
in MINERAL CHEMISTRY AND SHRIMP U–Pb GEOCHRONOLOGY OF MESOPROTEROZOIC POLYCRASE–TITANITE VEINS IN THE SULLIVAN Pb–Zn–Ag DEPOSIT, BRITISH COLUMBIA
> The Canadian Mineralogist
Published: 01 April 2008
) and references therein. Inset A. Age versus U concentration. Open circles are data from oscillatory-zoned (unaltered) polycrase (± titanite); filled squares are data from patchily zoned (altered) polycrase. Inset B. Concordia plot of isotopic data for titanite. Weighted average is calculated for 207 Pb/ 206
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A. Photomicrograph of thin polycrase–titanite vein in fine-grained tourmali...
in MINERAL CHEMISTRY AND SHRIMP U–Pb GEOCHRONOLOGY OF MESOPROTEROZOIC POLYCRASE–TITANITE VEINS IN THE SULLIVAN Pb–Zn–Ag DEPOSIT, BRITISH COLUMBIA
> The Canadian Mineralogist
Published: 01 April 2008
F ig . 1. A. Photomicrograph of thin polycrase–titanite vein in fine-grained tourmalinite from the footwall of the Sullivan Pb–Zn–Ag deposit. B. Detail of A showing concentrations of tourmaline along margins of the vein.
Image
Compositions of tourmaline from margins of polycrase–titanite veins compare...
in MINERAL CHEMISTRY AND SHRIMP U–Pb GEOCHRONOLOGY OF MESOPROTEROZOIC POLYCRASE–TITANITE VEINS IN THE SULLIVAN Pb–Zn–Ag DEPOSIT, BRITISH COLUMBIA
> The Canadian Mineralogist
Published: 01 April 2008
F ig . 6. Compositions of tourmaline from margins of polycrase–titanite veins compared to those in the host footwall tourmalinite and elsewhere in the Sullivan deposit. Data fields for hanging-wall and footwall tourmalinites are taken from Jiang et al. (1998) .
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SHRIMP U-Th-Pb DATA FOR POLYCRASE AND TITANITE FROM THE SULLIVAN Pb-Zn-Ag D...
in MINERAL CHEMISTRY AND SHRIMP U–Pb GEOCHRONOLOGY OF MESOPROTEROZOIC POLYCRASE–TITANITE VEINS IN THE SULLIVAN Pb–Zn–Ag DEPOSIT, BRITISH COLUMBIA
> The Canadian Mineralogist
Published: 01 April 2008
TABLE 3. SHRIMP U-Th-Pb DATA FOR POLYCRASE AND TITANITE FROM THE SULLIVAN Pb-Zn-Ag DEPOSIT
Journal Article
Żabińskiite, ideally Ca(Al 0.5 Ta 0.5 )(SiO 4 )O, a new mineral of the titanite group from the Piława Górna pegmatite, the Góry Sowie Block, southwestern Poland
Adam Pieczka, Frank C. Hawthorne, Chi Ma, George R. Rossman, Eligiusz Szełęg, Adam Szuszkiewicz, Krzysztof Turniak, Krzysztof Nejbert, Sławomir S. Ilnicki, Philippe Buffat, Bogdan Rutkowski
Journal: Mineralogical Magazine
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 591–610.
... at Piława Górna, Lower Silesia, SW Poland. The mineral occurs along with (Al,Ta,Nb)- and (Al,F)-bearing titanites, a pyrochlore-supergroup mineral and a K-mica in compositionally inhomogeneous aggregates, ∼120 μm × 70 μm in size, in a fractured crystal of zircon intergrown with polycrase-(Y) and euxenite-(Y...
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SEM micrograph of the titanite crystals in the albitized zones being replac...
in The El Muerto “NYF” Granitic Pegmatite, Oaxaca, Mexico, and Its Striking Enrichment In Allanite-(Ce) and Monazite-(Ce)
> The Canadian Mineralogist
Published: 01 August 2012
Fig. 8 SEM micrograph of the titanite crystals in the albitized zones being replaced by a fine-grained association of niobian rutile (with ilmenite exsolution-induced lamellae), thorutite, polycrase-(Y), and uranopolycrase. The gray host mineral is allanite-(Ce).
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Position of żabińskiite in the crystallization sequences of (Fe,Mn)–(Ti,Sn)...
in Żabińskiite, ideally Ca(Al 0.5 Ta 0.5 )(SiO 4 )O, a new mineral of the titanite group from the Piława Górna pegmatite, the Góry Sowie Block, southwestern Poland
> Mineralogical Magazine
Published: 01 June 2017
range in which żabińskiite crystallized coevally with polycrase-(Y) and euxenite-(Y). Abbreviations: CG – columbite-group minerals; IG – ixiolite-group minerals; SG – samarskite-group minerals; FG – fergusonite-group minerals; WG – wodginite-group minerals. Symbols: black solid arrows – evolution trends
Journal Article
Metamict aeschynite-(Y) from the Evje-Iveland district (Norway) : heat-induced recrystallization and dehydrogenation
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 January 2002
European Journal of Mineralogy (2002) 14 (1): 141–150.
... aeschynite-(Y) from Evje-Iveland. Values used in normalizing REE were taken from Boynton (1984) . On the basis of its chemical composition, the pre-metamict mineral from Evje-Iveland could be classified as aeschynite-(Y) ( Pnma space group), or as the chemically equivalent mineral polycrase-(Y...
Journal Article
The El Muerto “NYF” Granitic Pegmatite, Oaxaca, Mexico, and Its Striking Enrichment In Allanite-(Ce) and Monazite-(Ce)
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 August 2012
The Canadian Mineralogist (2012) 50 (4): 1055–1076.
...Fig. 8 SEM micrograph of the titanite crystals in the albitized zones being replaced by a fine-grained association of niobian rutile (with ilmenite exsolution-induced lamellae), thorutite, polycrase-(Y), and uranopolycrase. The gray host mineral is allanite-(Ce). ...
Journal Article
Le magmatisme de la région de Kwyjibo, Province du Grenville (Canada): intérêt pour les minéralisations de type fer-oxydes associées
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 13 December 2005
Canadian Journal of Earth Sciences (2005) 42 (10): 1849–1864.
... minéralisations au sud de la zone minéralisée ( Cayer 2001 ). Bien que la magnétite ait clairement subi une phase de déformation ductile, les datations U/Pb de l’allanite, de la titanite et de la pérovskite des indices Josette et Grabuge donnent des âges respectifs de 972 et 951 Ma, ce qui suggère une mise en...
Journal Article
A COMPARISON OF THE MINERALOGICAL AND GEOCHEMICAL CHARACTER AND GEOLOGICAL SETTING OF PROTEROZOIC REE-RICH GRANITIC PEGMATITES OF THE NORTH-CENTRAL AND SOUTHWESTERN US
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 2012
The Canadian Mineralogist (2012) 50 (6): 1695–1712.
... replacement units located at the boundary of the core and intermediate zone on the footwall side of the core, where aeschynite-(Y), euxenite-(Y), polycrase-(Y), and betafite occur ( Hanson et al. 2007 ) ( Fig. 2b ). Accessory Fe–Ti oxides and very minor apatite, titanite, zircon, thorogummite and uraninite...
Journal Article
Origin of Tin Mineralization in the Sullivan Pb-Zn-Ag Deposit, British Columbia: Constraints from Textures, Geochemistry, and LA-ICP-MS U-Pb Geochronology of Cassiterite
John F. Slack, Leonid A. Neymark, Richard J. Moscati, Heather A. Lowers, Paul W. Ransom, Robert L. Hauser, David T. Adams
Journal: Economic Geology
Publisher: Society of Economic Geologists
Published: 24 August 2020
Economic Geology (2020) 115 (8): 1699–1724.
... at Sullivan LeCouteur ( 1979 ) 1413 ± 4 U-Pb Polycrase Footwall polycrase-titanite vein at Sullivan Slack et al. ( 2008 ) 1413 ± 8 U-Pb Monazite Lower (?) Aldridge Formation McFarlane ( 2015 ) 1380-1325 U-Pb Monazite Lower (?) Aldridge Formation McFarlane ( 2015 ) 1375 ± 23 U-Pb...
Includes: Supplemental Content
Journal Article
The Euxenite-group Minerals and Products of Their Alteration in the Hybrid Julianna Granitic Pegmatite, PiŁawa GÓrna, Sudetes, Southwestern Poland
Adam Szuszkiewicz, Adam Pieczka, Eligiusz SzeŁĘg, Krzysztof Turniak, Sławomir Ilnicki, Krzysztof Nejbert
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 July 2016
The Canadian Mineralogist (2016) 54 (4): 879–898.
...Adam Szuszkiewicz; Adam Pieczka; Eligiusz SzeŁĘg; Krzysztof Turniak; Sławomir Ilnicki; Krzysztof Nejbert Abstract Polycrase-(Y) and euxenite-(Y) represent the euxenite-group minerals (EGM) that formed as magmatic minerals in the sequence of (Y,REE,U,Th)–(Nb,Ta,Ti) oxides: columbite-(Fe) → Ti...
Journal Article
Hydrothermal alteration of chevkinite-group minerals. Part 2. Metasomatite from the Keivy massif, Kola Peninsula, Russia
Journal: Mineralogical Magazine
Published: 01 October 2015
Mineralogical Magazine (2015) 79 (5): 1039–1059.
.../polycrase-(Y), ~20 μm in size, in metamorphosed A-type granites of the Turčok massif, Slovakia. Papoutsa and Pe-Piper ( 2013 ) found, in the Wentworth granite, that aeschynite-(Y) occurs only in close proximity to, and post-dated, titanite. They suggested that breakdown of titanite to a TiO 2 phase...
Journal Article
NIOBOAESCHYNITE-(Y), A NEW MEMBER OF THE AESCHYNITE GROUP FROM THE BEAR LAKE DIGGINGS, HALIBURTON COUNTY, ONTARIO, CANADA
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 April 2008
The Canadian Mineralogist (2008) 46 (2): 395–402.
... of crustal rocks, totally unrelated to mantle-derived alkaline magmas. F ig . 1. Location of the mineral sampling area investigated; the map is from Vertolli et al. (1998) . The calcite vein-dikes at Bear Lake host the minerals apatite-(CaF), amphibole, titanite, and feldspar group...
Journal Article
A proposed new mineralogical classification system for granitic pegmatites
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 29 March 2022
The Canadian Mineralogist (2022) 60 (2): 229–248.
...), fergusonite, and polycrase are commonly associated minerals, whereas xenotime-(Y), schorl, fluorite, magnetite, rutile, zircon, and titanite are present in minor quantities. Pegmatites with substantial Be mineralization are noted for the presence of green, yellow-green, or blue beryl, sometimes accompanied...
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