Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Robert L. Linnen"'
Publikováno v:
Economic Geology. 118:209-223
Peralkaline rocks (defined by molar (Na + K)/Al > 1) are typically enriched in Nb and halogens (such as F and Cl). They can further be subdivided into silica-saturated (e.g., alkali granites) and silica-undersaturated (e.g., nepheline syenites). The
Publikováno v:
American Mineralogist. 108:31-41
Beryllium is a critical metal typically concentrated in highly fractionated granitic rocks such as the leucogranites in the Himalaya. Here, we report beryl mineralization that was continuous from the earlier and less-evolved two-mica granite to the h
Publikováno v:
The Canadian Mineralogist. 59:1571-1597
The Geordie Lake Cu-Pd deposit is associated with troctolite at the base of the Geordie Lake intrusion, located near the center of the Coldwell Complex (1106.5 + 1.2 Ma). It is the only platinum group element deposit in the Midcontinent Rift associat
Publikováno v:
Mineralium Deposita. 56:1151-1176
The W Horizon is a thin continuous zone of low sulfide-high-grade platinum group element (PGE) mineralization in the Two Duck Lake gabbro at the Marathon Cu-PGE deposit, Coldwell Complex, Canada, that resembles reef-type PGE deposits found in much la
Publikováno v:
The Canadian Mineralogist. 59:869-884
Uranium deposits are globally diverse, occurring in a wide variety of geological settings and ranging in age from Archean to Holocene. As a result, understanding the mechanisms involved in the genesis and subsequent alteration of these complex deposi
Publikováno v:
American Mineralogist. 105:1078-1087
Niobium and tantalum, rare metals and high field strength elements (HFSEs) that are essential to modern technologies, are concentrated among others in lithium-cesium-tantalum (LCT) pegmatites and rare metal granites. The most important hosts for Nb-T
Publikováno v:
Mineralium Deposita. 56:621-642
The Eastern Gabbro of the alkaline Coldwell Complex, Canada, represents a Ni-poor conduit-type system that comprises two rock series, the Layered Series and Marathon Series, which intruded into a metabasalt package. Based on distinct variations in ma
Publikováno v:
Mineralium Deposita. 56:601-618
Magnetite (mag)–ilmenite (ilm) intergrowths are more common than mag–ulvospinel (usp) intergrowths in mafic–ultramafic Ni–Cu–PGE systems, yet the former has no known solid solution. The most accepted model for the formation of mag–ilm int
Publikováno v:
Economic Geology. 115:355-384
The Eastern Gabbro, Coldwell Complex, hosts several geochemically and mineralogically distinct Cu-platinum group element (PGE) deposits, including the high-grade W Horizon (>100 ppm Pd-Pt-Au over 2 m). Several magmatic and/or hydrothermal models have
Autor:
David J. Good, Iain M. Samson, Doreen E. Ames, Maryam Shahabi Far, Robert L. Linnen, Joel E. Gagnon
Publikováno v:
Journal of Petrology. 60:1427-1460
The Marathon platinum group element (PGE)–Cu deposit is hosted by the Two Duck Lake Gabbro of the Mesoproterozoic Coldwell Complex, Canada, and comprises three zones of mineralization, which have different textural, mineralogical and geochemical ch