Search Results - "Allen, Rodney L"

Origin of Palaeoproterozoic, sub-seafloor Zn-Pb-Ag skarn deposits, Sala area, Bergslagen, Sweden by Jansson, Nils F., Allen, Rodney L., Skogsmo, Göran, Turner, Thomas

“…Unravelling the genesis of metamorphosed mineral deposits can be complicated due to difficulties in separating between primary features and features that…”
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Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc, Skellefte District, Sweden by Allen, Rodney L, Weihed, Par, Svenson, Sven-Ake

“…The Skellefte mining district occurs in an Early Proterozoic, mainly 1.90-1.87 Ga (Svecofennian) magmatic province of low to medium metamorphic grade in the…”
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Variability in the geologic, mineralogical, and geochemical characteristics of base metal sulfide deposits in the Stollberg ore field, Bergslagen District, Sweden by Frank, Katherine S, Spry, Paul G, Raat, Hein, Allen, Rodney L, Jansson, Nils F, Ripa, Magnus

“…The Stollberg ore field occurs in the Bergslagen region of south-central Sweden, a polydeformed ca. 1.9 Ga igneous province dominated by bimodal felsic and…”
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Timing and setting of skarn and iron oxide formation at the Smältarmossen calcic iron skarn deposit, Bergslagen, Sweden by Jansson, Nils F., Allen, Rodney L.

“…Abundant iron oxide deposits including banded iron formations, apatite iron oxide ores, and enigmatic marble/skarn-hosted magnetite deposits occur in the…”
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Hydrothermal alteration and volatile element halos for the Rosebery K Lens volcanic-hosted massive sulfide deposit, western Tasmania by Large, Ross R, Allen, Rodney L, Blake, Michael D, Herrmann, Walter

“…A detailed study of alteration mineralogy, mineral chemistry, and lithogeochemistry in the host rocks surrounding the A-B and K lenses at the north end of the…”
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Correlation between distribution and shape of VMS deposits and regional deformation patterns, Skellefte district, northern Sweden by Bauer, Tobias E., Skyttä, Pietari, Hermansson, Tobias, Allen, Rodney L., Weihed, Pär

“…The Skellefte district in northern Sweden is host to abundant volcanogenic massive sulphide (VMS) deposits comprising pyritic, massive, semi-massive and…”
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A comment on the occurrence of gallium and germanium in the Zinkgruvan Zn-Pb-Ag-(Cu) sulphide deposit, Bergslagen, Sweden by Jansson, Nils F., Malmström, Lars, Zetterqvist, Anders, Allen, Rodney L.

“…The Zinkgruvan deposit has been included in compilations of exceptionally Ga- and Ge-endowed deposits in Sweden. Available published data sets do, however, not…”
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Evolution of the Paleoproterozoic volcanic-limestone-hydrothermal sediment succession and Zn-Pb-Ag and iron oxide deposits at Stollberg, Bergslagen region, Sweden by Jansson, Nils F, Erismann, Fabian, Lundstam, Erik, Allen, Rodney L

“…The Stollberg Zn-Pb-Ag and magnetite mining field is located in the Bergslagen region of the Fennoscandian Shield. The main Stollberg ore deposits comprise a…”
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Timing of volcanism, hydrothermal alteration and ore formation at Garpenberg, Bergslagen, Sweden by Jansson, Nils F., Allen, Rodney L.

“…The timing of Palaeoproterozoic magmatism in the Garpenberg area in the Bergslagen region of the Fennoscandian shield has been constrained by secondary ion…”
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Fault-controlled sedimentation in a progressively opening extensional basin: the Palaeoproterozoic Vargfors basin, Skellefte mining district, Sweden by Bauer, Tobias E., Skyttä, Pietari, Allen, Rodney L., Weihed, Pär

“…The Vargfors basin in the central part of the Skellefte mining district is an inverted sedimentary basin within a Palaeoproterozoic (1.89 Ga) marine volcanic…”
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The Boliden gold-rich volcanogenic massive sulfide deposit, Skellefte district, Sweden: new U–Pb age constraints and implications at deposit and district scale by Mercier-Langevin, Patrick, McNicoll, Vicky, Allen, Rodney L., Blight, James H. S., Dubé, Benoît

“…The Boliden deposit (8.3 Mt at 15.9 g/t Au) is interpreted to have been formed between ca. 1894 and 1891 Ma, based on two new U–Pb ID-TIMS ages: a maximum age…”
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The origin of skarn beds, Ryllshyttan Zn–Pb–Ag + magnetite deposit, Bergslagen, Sweden by Jansson, Nils F., Allen, Rodney L.

“…Thin- to medium-bedded, stratiform calc-silicate deposits (banded skarns) are a peculiar, but important, component of the supracrustal successions in the…”
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Reconstruction of the tectonic, volcanic, and sedimentary setting of strongly deformed Zn-Cu massive sulfide deposits at Benambra, Victoria by Allen, Rodney L

“…The Wilga and Currawong massive sulfide deposits at Benambra are hosted by a strongly deformed, Upper Silurian rhyolite-dacite-andesite-basalt-sediment…”
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A thematic issue on the geological setting and genesis of volcanogenic massive sulfide (VMS) deposits by Allen, Rodney L., Tornos, Fernando, Peter, Jan M.

“…Issue Title: Thematic Issue on The Geological Setting And Genesis Of Volcanogenic Massive Sulfide (VMS) Deposits…”
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Facies analysis of a 1.9 Ga, continental margin, back-arc, felsic caldera province with diverse Zn-Pb-Ag-(Cu-Au) sulfide and Fe oxide deposits, Bergslagen region, Sweden by Allen, Rodney L, Lundstrom, Ingmar, Ripa, Magnus, Christofferson, Hans

“…The Bergslagen mining district in south-central Sweden has been a major metal producer for more than 1,000 years. In geologic terms, Bergslagen is the…”
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Apparent welding textures in altered pumice-rich rocks by Gifkins, Cathryn C., Allen, Rodney L., McPhie, Jocelyn

“…Fiamme and eutaxitic texture are common in ancient non-welded, pumice breccias. The fiamme are phyllosilicate-rich lenses that define a bedding-parallel…”
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Principal component analysis and K-means clustering as tools during exploration for Zn skarn deposits and industrial carbonates, Sala area, Sweden by Jansson, Nils F., Allen, Rodney L., Skogsmo, Göran, Tavakoli, Saman

“…This contribution presents an application of principal component analysis (PCA) and K-means clustering as tools for data dimension reduction and grouping of…”
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Age constraints on c. 1.9 Ga volcanism, basin evolution and mineralization at the world-class Zinkgruvan Zn-Pb-Ag(-Cu) deposit, Bergslagen, Sweden by Jansson, Nils F., Simán, Filip, Allen, Rodney L., Mansfeld, Joakim, Kampmann, Tobias C.

“…•Improved age constrains on metavolcanic rocks in Bergslagen, Fennoscandian shield.•The Zinkgruvan Zn-Pb-Ag deposit constrained to c. 1.90–1.89 Ga using SIMS…”
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Textural and chemical characteristics of diagenetic and hydrothermal alteration in glassy volcanic rocks; examples from the Mount Read Volcanics, Tasmania by Gifkins, Cathryn C, Allen, Rodney L

“…The Mount Black and Sterling Valley Volcanics comprise a complex Cambrian succession of originally glassy, felsic to mafic, submarine volcanic facies in…”
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False pyroclastic textures in altered silicic lavas, with implications for volcanic-associated mineralization by Allen, Rodney L

“…There is strong emphasis in recent literature that Zn-Cu-Pb massive sulfide deposits associated with felsic volcanism (the kuroko-type deposits) are directly…”
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