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Rodney L. Allen
Luleå University of Technology
23Publications
7H-index
140Citations
Publications 23
Newest
2018 in Mineralium DepositaIF: 3.37
Kofi Adomako-Ansah1
Estimated H-index: 1
(Akita University),
Daizo Ishiyama12
Estimated H-index: 12
(Akita University),
Rodney L. Allen7
Estimated H-index: 7
Adjacent to the world-class Boliden deposit, fine- to coarse-grained Zn-Pb-Sb-Au-rich sulfide-sulfosalt-bearing horizons occur within the base of a metasedimentary succession that has previously been regarded to stratigraphically overlie the Skellefte Volcanics and Boliden deposit. The metasedimentary succession comprises interbedded mudstone and normal-graded crystal-rich volcanic sandstone-siltstone units, interpreted to be low-density turbidity currents in a subaqueous environment below wave ...
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Nils Jansson5
Estimated H-index: 5
(Luleå University of Technology),
A. Zetterqvist + 1 AuthorsL. Malmström
Abstract The Zinkgruvan deposit is the largest stratiform Zn-Pb-Ag mineralization in Sweden. The most recent genetic model attributes ore formation to the discharge of oxidized, near-neutral pH, metalliferous brines into a reduced basin, forming laterally extensive, stratiform sulfide mineralization on the seafloor. It has a known strike extent of 5 km and is underlain by a regionally extensive zone of K-altered metavolcanic rock and dolomitic marble, the latter hosting Cu-(Co-Ni) replacement mi...
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2018 in Economic GeologyIF: 3.29
Nils Jansson5
Estimated H-index: 5
(Luleå University of Technology),
S. Sädbom (Luleå University of Technology)+ 2 AuthorsP. G. Spry (Luleå University of Technology)
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2017 in Ore Geology ReviewsIF: 3.99
Nils Jansson5
Estimated H-index: 5
(Luleå University of Technology),
Anders Zetterqvist1
Estimated H-index: 1
+ 2 AuthorsLars Malmström2
Estimated H-index: 2
Abstract Zinkgruvan, a major stratiform Zn-Pb-Ag deposit in the Paleoproterozoic Bergslagen region, south-central Sweden, was overprinted by polyphase ductile deformation and high-grade metamorphism (including partial melting of the host succession) during the 1.9–1.8 Ga Svecokarelian orogeny. This complex history of post-ore modification has made classification of the deposit difficult. General consensus exists on a syngenetic-exhalative origin, yet the deposit has been variably classified as a...
4 Citations Source Cite
2017
Nils Jansson5
Estimated H-index: 5
,
Rodney L. Allen7
Estimated H-index: 7
+ 1 AuthorsAnders Zetterqvist1
Estimated H-index: 1
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2016 in GffIF: 1.81
Nils Jansson5
Estimated H-index: 5
(Luleå University of Technology),
Lars Malmström2
Estimated H-index: 2
+ 1 AuthorsRodney L. Allen7
Estimated H-index: 7
(Luleå University of Technology)
AbstractThe Zinkgruvan deposit has been included in compilations of exceptionally Ga- and Ge-endowed deposits in Sweden. Available published data sets do, however, not support a substantial enrichment in Ga and Ge. In this contribution, we investigate the Ga- and Ge-endowment based on a whole-rock lithogeochemical data and ore grade analyses from the deposit. Based on our results, we find it highly unlikely that a Ga-endowment exists in the ore. A Ge-endowment may exist, but we find no evidence ...
1 Citations Source Cite
2015 in Ore Geology ReviewsIF: 3.99
Nils Jansson5
Estimated H-index: 5
(Luleå University of Technology),
Rodney L. Allen7
Estimated H-index: 7
(Luleå University of Technology)
Abstract Numerous magnetite skarn deposits and marble- and skarn-hosted base metal sulphide deposits occur in polydeformed and metamorphosed, felsic-dominated metavolcanic inliers in the Palaeoproterozoic Bergslagen region of south-central Sweden, including the Ryllshyttan magnetite and Zn–Pb–Ag–(Cu) sulphide deposit, approximately 2.5 km SW of the large Garpenberg Zn–Pb–Ag–(Cu–Au) deposit. The Ryllshyttan deposit, from which approximately 1 Mt of Zn-rich massive sulphide ore and 0.2 Mt of semi-...
8 Citations Source Cite
2015 in Ore Geology ReviewsIF: 3.99
Fernando Tornos8
Estimated H-index: 8
(Spanish National Research Council),
Jan M. Peter12
Estimated H-index: 12
(Geological Survey of Canada)
+ 1 AuthorsCarmen Conde4
Estimated H-index: 4
Abstract Volcanogenic massive sulphide (VMS) deposits form in subaqueous environments from circulating hydrothermal fluids heated by volcanic activity. These deposits form as sulphide mounds, stratiform exhalative and/or replacive bodies and commonly have stockwork/vein mineralization in their immediate footwall. These various “styles” are essentially facies of mineralization, each one being the product of a particular set of conditions that control the ore-forming processes and the consequent g...
25 Citations Source Cite
2015
Nils Jansson5
Estimated H-index: 5
,
Anders Zetterqvist1
Estimated H-index: 1
+ 1 AuthorsLars Malmström2
Estimated H-index: 2
Zinkgruvan is an elusive Palaeoproterozoic stratiform Zn-Pb-Ag deposit which has been discussed in the context of sediment-hosted Zn-Pb (SEDEX), volcanic-hosted massive sulphide (VHMS) and Broken H ...
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2014 in Mineralium DepositaIF: 3.37
Tobias Bauer6
Estimated H-index: 6
(Luleå University of Technology),
Pietari Skyttä7
Estimated H-index: 7
(Luleå University of Technology)
+ 2 AuthorsPär Weihed13
Estimated H-index: 13
(Luleå University of Technology)
The Skellefte district in northern Sweden is host to abundant volcanogenic massive sulphide (VMS) deposits comprising pyritic, massive, semi-massive and disseminated Zn–Cu–Au ± Pb ores surrounded by disseminated pyrite and with or without stockwork mineralisation. The VMS deposits are associated with Palaeoproterozoic upper crustal extension (D1) that resulted in the development of normal faults and related transfer faults. The VMS ores formed as sub-seafloor replacement in both felsic volcanicl...
3 Citations Source Cite
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