Výsledky vyhledávání - "Reid R. Keays"

Petrogenesis of the Permian Luotuoshan sulfide-bearing mafic-ultramafic intrusion, Beishan Orogenic Belt, NW China: evidence from whole-rock Sr–Nd–Pb and zircon Hf isotopic geochemistry

Autor: Gang Xu, Jiangjiang Zhang, Zhuangzhi Qian, Wenbin Gao, Jun Duan, Reid R. Keays, Bocheng Ma

Publikováno v: Journal of Geochemical Exploration. 233:106920

The Permian Luotuoshan mafic-ultramafic intrusion is one of the ∼280 Ma mafic-ultramafic complexes located in the Beishan Orogenic Belt at the southern margin of the Central Asian Orogenic Belt, NW China. The intrusion is predominantly composed of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2dda8c90974a7847d9294fb5dc947418
https://doi.org/10.1016/j.gexplo.2021.106920

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Geochemistry of the igneous rocks of the Belingwe Greenstone Belt: Alteration, contamination and petrogenesis

Autor: Nicholas Arndt, J.L. Orpen, Euan G. Nisbet, R. Renner, Anthony J. Martin, Mike J. Bickle, Reid R. Keays

The Belingwe Belt contains an andesitic suite, two suites of komatiites associated with voluminous tholeiites, and assorted intrusive igneous rocks. Some of the latter include remarkably fresh komatiite and basalt, containing little altered olivine a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::59a8c728d653e15e84ff07075c9e6220
https://doi.org/10.1201/9781003077596-8

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The geology, geochemistry and Ni-Cu-PGE potential of mafic-ultramafic bodies associated with the Dido Batholith, North Queensland, Australia

Autor: Fiona C. Best, Reid R. Keays, Anthony J. Crawford, Paul A. Polito

Publikováno v: Ore Geology Reviews. 90:532-552

Four elongate, km-scale, mafic to ultramafic bodies (UMB) were identified within the Ordovician-Silurian Dido Batholith, north Queensland, and were assessed for Ni-Cu-PGE fertility. The UMB comprise layered cumulate sequences and represent open-syste

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c9855787c1503c3a2b14c241e25f4c16
https://doi.org/10.1016/j.oregeorev.2017.05.002

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Platinum mineralisation in the Owendale Uralian-Alaskan-type complex, New South Wales, Australia: The effects of serpentinization on Cu-PGE-Ni sulphides

Autor: Hazel Margaret Prichard, David A. Holwell, Reid R. Keays

Publikováno v: Ore Geology Reviews. 130:103928

Significant, albeit highly erractic, PGE mineralization is hosted in the ultramafic rocks of the Owendale Complex, a Uralian-Alaskan type intrusion in the Fifield region of central New South Wales, Australia. Three types of PGE mineralization have be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7bd10f5048ab0bb87fe84b6040671cdd
https://doi.org/10.1016/j.oregeorev.2020.103928

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3D textural evidence for the formation of ultra-high tenor precious metal bearing sulphide microdroplets in offset reefs: An extreme example from the Platinova Reef, Skaergaard Intrusion, Greenland

Autor: Richard Prasser, Margaux Le Vaillant, Stephen Barnes, David A. Holwell, Louise Fisher, Reid R. Keays

Publikováno v: Lithos. :55-74

The Platinova Reef in the Skaergaard Intrusion, east Greenland, is an example of a type of layered-intrusion-hosted, precious metal-enriched, stratiform, disseminated sulphide deposit referred to as “offset reefs”. These typically show platinum-g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a06671d6232f79f16ee8706bd85756d
https://doi.org/10.1016/j.lithos.2016.03.020

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Magma Chamber Processes in the Formation of the Low-sulphide Magmatic Au–PGE Mineralization of the Platinova Reef in the Skaergaard Intrusion, East Greenland

Autor: Reid R. Keays, Christian Tegner

Publikováno v: Keays, R R & Tegner, C 2015, ' Magma Chamber Processes in the Formation of the Low-sulphide Magmatic Au–PGE Mineralization of the Platinova Reef in the Skaergaard Intrusion, East Greenland. ', Journal of Petrology, vol. 56, no. 12, pp. 2319-2340 . https://doi.org/10.1093/petrology/egv075

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72a679a06c373ec111ce2c846b7056bc
https://doi.org/10.1093/petrology/egv075

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Mafic intrusions in the footwall of the Sudbury Igneous Complex: Origin of the Sudbury impact melt sheet and its associated ore deposits

Autor: Peter C. Lightfoot, Reid R. Keays

Publikováno v: Ore Geology Reviews. 120:103435

The majority of the mafic intrusions and volcanic rocks in the footwall of the Sudbury Igneous Complex (SIC), which is believed to have formed from a melt sheet produced by the impact of a very large bolide, belong to one of two large mafic igneous s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f9befefb8c884cf23932f1aeebb755ca
https://doi.org/10.1016/j.oregeorev.2020.103435

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Geochemical Stratigraphy of the Keweenawan Midcontinent Rift Volcanic Rocks with Regional Implications for the Genesis of Associated Ni, Cu, Co, and Platinum Group Element Sulfide Mineralization

Autor: Peter C. Lightfoot, Reid R. Keays

Publikováno v: Economic Geology. 110:1235-1267

The development of the North American Midcontinent rift can be understood in the context of a tectonic and magmatic event in which the far-field effects of continental drift influenced magmatism produced by a mantle plume. We report and interpret new

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e9505e1926b215ce94cefdbe330994e
https://doi.org/10.2113/econgeo.110.5.1235

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Controls on disseminated PGE–Cu–Ni sulfide mineralization within the Rietfontein deposit, Eastern Limb, Bushveld Complex, South Africa: Implications for the formation of contact-type magmatic sulfide deposits

Autor: Brendan Hardwick, Reid R. Keays, Simon M. Jowitt

Publikováno v: Ore Geology Reviews. 64:253-272

The Rietfontein platinum group element (PGE)–Cu–Ni sulfide deposit of the Eastern Limb of the Bushveld Complex hosts disseminated contact-style mineralization that is similar to other economic magmatic sulfide deposits in marginal settings within

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75d841af2d2f295777791afdaccc0db8
https://doi.org/10.1016/j.oregeorev.2014.07.006

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