Mineralogical and Geochemical Study of the Regal Ridge Emerald Showing, Southeastern Yukon

Groat, Lee A.; Marshall, Daniel D.; Giuliani, Gaston; Murphy, Donald C.; Piercey, Stephen J.; Jambor, John L.; Mortensen, James K.; Ercit, T. Scott; Gault, Robert A.; Mattey, D. P.; Schwarz, Dietmar; Maluski, H.; Wise, Michael A.; Wengzynowski, William; Eaton, Douglas W.

doi:10.2113/gscanmin.40.5.1313

Cited by 46 publications

(52 citation statements)

References 37 publications

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“…14; Marshall et al 2004). A similar magmatic origin has been suggested by Groat et al (2002) for emeralds at Regal Ridge, Yukon (now called Tsa da Glisza).…”

Section: Intrusion-hosted Rare-element and Gemstone Depositssupporting

confidence: 59%

“…13 and 15;Mercier et al 2008;Hewton et al 2011a, b;Hewton 2012). This beryl more closely resembles Columbian or schist-type (Hewton et al 2011a, b;Hewton 2012), rather than the predominantly igneous-related emeralds at Lened and Regal Ridge (Groat et al 2002;Marshall et al 2004). …”

Section: Diamonds and Other Gemstonesmentioning

confidence: 74%

“…13) and Regal Ridge (Groat et al 2002;Marshall et al 2004) the Mountain River beryl cannot be linked to a Cretaceous pluton; the nearest pluton is about 85 km to the southwest and it appears unlikely that one exists in the subsurface (Figs. 13 and 15;Mercier et al 2008;Hewton et al 2011a, b;Hewton 2012).…”

Section: Diamonds and Other Gemstonesmentioning

confidence: 99%

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Metallogenic Evolution of the Mackenzie and Eastern Selwyn Mountains of Canada’s Northern Cordillera, Northwest Territories: A Compilation and Review

Ootes

Gleeson

Turner

et al. 2013

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The Mackenzie and eastern Selwyn Mountains, Northwest Territories, Canada, are the northeast expression of the Cordilleran orogen and have a geologic history that spans the last one billion years. The region has undergone a diverse tectonic evolution, which is reflected in an equally diverse collection of mineral deposits and prospects. More than 300 of these deposits and prospects have been documented in this area of the Northwest Territories and here they are categorized into mineral deposit types and their mode of formation evaluated and highlighted. Stratiform/stratabound Cu-Ag occurrences are hosted in the Neoproterozoic Coates Lake Group, generally preserved in the hanging wall of the Cretaceous Plateau fault, and define a belt through the central part of the Mackenzie Mountains. Low-grade phosphatic stratiform iron (47.5% Fe) occurs as iron formation in the Neoproterozoic Rapitan Group in the very northwest of the Mackenzie Mountains. Sedimentary exhalative Zn-Pb (± Ba) deposits are preserved in Cambrian through Devonian strata of the Selwyn Basin in the eastern Selwyn Mountains. Numerous carbonate-hosted Zn-Pb (± base-metals) occurrences are located in the Paleozoic strata of the Mackenzie Platform in the Mackenzie Mountains. Cretaceous felsic-intermediate plutons, which occur throughout the eastern Selwyn Mountains, are associated with tungsten skarn (proximal to intrusions), base-metal skarn (distal from intrusions), rare metals, semi-precious tourmaline related to pegmatites, and vein-hosted emeralds. Other resources of potential interest include coal deposits, placer gold, and possible Carlin-type gold deposits that have recently been identified farther west in the Yukon.SOMMAIRELes monts Mackenzie et ceux de la chaîne orientale de Selwyn, dans les Territoires du Nord-Ouest, au Canada, sont l'expression au nord-est de l'orogène de la Cordillère, et leur histoire géologique s’étale sur le dernier milliard d’années. La région a été l’hôte d’une évolution tectonique diversifiée, et cela se reflète par une suite tout aussi diversifiée de gisements minéraux et d’indices prometteurs. Plus de 300 de ces dépôts et indices prometteurs ont été documentées dans cette région des Territoires du Nord-Ouest, et le présent article ils sont classés en types de gîtes minéraux, et l’attention est portée sur leur mode de formation. Les gisements de Cu-Ag stratiformes ou stratoïdes sont encaissés dans le Groupe néoprotérozoïque de Coates Lake, et ils sont généralement préservés dans l'éponte supérieure de la faille du plateau crétacé, et ils forment une bande qui traverse la partie centrale des monts Mackenzie. Le fer se retrouve dans des gisements phosphatées stratiformes à faible teneur (47,5% Fe) qui provient de formations de fer dans le Groupe néoprotérozoïque de Rapitan situé dans la pointe nord-ouest des monts Mackenzie. Des gisements sédimentaires exhalatifs de Zn-Pb (± Ba) sont préservés dans des strates cambriennes à dévoniennes du bassin de Selwyn dans la portion est des monts Selwyn. De nombreux indices de Zn-Pb (± métaux communs) dans des roches carbonatées des strates paléozoïques de la plate-forme de Mackenzie, des monts Mackenzie. Des plutons felsiques intermédiaires crétacés, qui pointent tout au long de la chaîne est de Selwyn, sont associées à des skarns de tungstène (proximaux), à des skarns de métaux communs (distaux), à des concentrations de métaux rares, de tourmaline semi-précieuses liés aux pegmatites, et à des émeraudes filoniennes. Parmi d’autres ressources d'intérêt, on retrouve des gisements de charbon, d'or alluvionnaire, et d’éventuels gisements d'or de type Carlin qui ont été découverts récemment plus à l'ouest au Yukon.

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“…14; Marshall et al 2004). A similar magmatic origin has been suggested by Groat et al (2002) for emeralds at Regal Ridge, Yukon (now called Tsa da Glisza).…”

Section: Intrusion-hosted Rare-element and Gemstone Depositssupporting

confidence: 59%

Section: Diamonds and Other Gemstonesmentioning

confidence: 74%

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Metallogenic Evolution of the Mackenzie and Eastern Selwyn Mountains of Canada’s Northern Cordillera, Northwest Territories: A Compilation and Review

Ootes

Gleeson

Turner

et al. 2013

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“…It occurs in caprocks and salt domes (Henry et al 1999), in granite and granite pegmatite, in the volcanic-rock-hosted massive sulfide deposits (Taylor & Slack 1984), in porphyry-copper deposits (King et al 2000, Lynch & Ortega 1997, Yavuz et al 1999, in metamorphosed stratabound Pb-Zn deposits (Slack 1996, Jiang et al 1998, in medium-temperature hydrothermal gold (Robert & Brown 1986, Anglin et al 1996 and tin deposits (Kuzmin et al 1979), in greisen deposits (London & Manning 1995), and schist-type emerald deposits (Vlasov & Kutukova 1960, Groat et al 2002. Substitutions are thus widespread in tourmaline-group minerals, whose structural formula is XY 3 Z 6 [T 6 O 18 ][BO 3 ] 3 V 3 W (Hawthorne & Henry 1999).…”

Section: Introductionmentioning

confidence: 99%

Nickeloan Tourmaline From the Berezovskoe Gold Deposit, Middle Urals, Russia

Бакшеев¹,

Kudryavtseva²

2004

The Canadian Mineralogist

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Nickeloan tourmaline (up to 0.531 apfu Ni) associated with nickeloan talc (0.511-0.582 apfu Ni) or chromian muscovite is developed in magnesite-quartz veins hosted in ultramafic talc + magnesite ± hematite ± chromian muscovite hydrothermal alteration located in Uspenskaya Gorka, eastern flank of the Berezovskoe gold deposit, Middle Urals, Russia. The unusual Nirich composition of the silicates reflects the geochemical environment of formation. Tourmalines are represented by light and dark green needles in aggregates up to 2 cm in length. Crystals are characterized by a strong pleochroism, from colorless to green. Keywords: nickeloan tourmaline, nickeloan talc, chromian muscovite, ultramafic talc-carbonate alteration, Berezovskoe gold deposit, Urals, Russia. SOMMAIRELa tourmaline nickelifère (jusqu'à 0.531 apfu Ni) associée au talc nickelifère (0.511-0.582 apfu Ni) ou à la muscovite chromifère s'est développée dans des veines à magnésite + quartz recoupant des zones d'altération hydrothermales ultramafiques à talc + magnésite ± hématite ± muscovite chromifère situées à Uspenskaya Gorka, sur le flanc oriental du gisement aurifère de Berezovskoe, dans les Ourales moyennes, en Russie. La composition inhabituellement enrichie en Ni des silicates découle du milieu géochimique de formation. Mots-clés: tourmaline nickelifère, talc nickelifère, muscovite chromifère, altération ultramafique à talc-carbonate, gisement aurifère de Berezovskoe, Ourales, Russie. §

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“…The presence of excess silica is common when the Be-site (3 atoms) or Al-site (2 atoms) is assumed full to calculate the beryl formula (Sanders and Doff 1991;Abdalla and Mohamed 1999;Groat et al 2002;Černý et al 2003;. Excess silica can be assigned to the Be tetrahedron (Aurisicchio et al 1988) permitting the coupled substitution Be + 2Al = Si + 2(Fe, Mg) (Sanders and Doff 1991).…”

Section: Beryl Systematicsmentioning

confidence: 99%

Aquamarine beryl from Zealand Station, Canada: a mineralogical and stable isotope study

Beal¹,

Lentz²

2012

Jour. Geosci.

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Aquamarine crystals occur in crustal A-type pegmatite-aplite dykes and associated quartz veins and greisen zones at the Zealand Station Be-Mo deposit, south-central New Brunswick (Canada). Electron-probe microanalysis (EPMA) of aquamarine determined that the chromophore Fe (< 1.4 wt. % FeO T ) is present in octahedral sites, with substitutions responsible for simple and oscillatory zonation (SEM-BSE imaging). Average water content (1.53 wt. %) was calculated using an empirical formula, consistent with two T REL (>800 °C) of 1.3-1.4 wt. % in beryl channels. The δ

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Mineralogical and Geochemical Study of the Regal Ridge Emerald Showing, Southeastern Yukon

Cited by 46 publications

References 37 publications

Metallogenic Evolution of the Mackenzie and Eastern Selwyn Mountains of Canada’s Northern Cordillera, Northwest Territories: A Compilation and Review

Metallogenic Evolution of the Mackenzie and Eastern Selwyn Mountains of Canada’s Northern Cordillera, Northwest Territories: A Compilation and Review

Nickeloan Tourmaline From the Berezovskoe Gold Deposit, Middle Urals, Russia

Aquamarine beryl from Zealand Station, Canada: a mineralogical and stable isotope study

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