Steffen Hagemann
University of Western Australia
134Publications
23H-index
2,109Citations
Publications 134
Newest
Published on Mar 1, 2019in Journal of South American Earth Sciences 1.64
Flávia Cristina Silveira Braga1
Estimated H-index: 1
(Universidade Federal de Minas Gerais),
Carlos Alberto Rosière12
Estimated H-index: 12
(Universidade Federal de Minas Gerais)
+ 3 AuthorsPedro Valle Salles (Centro Federal de Educação Tecnológica de Minas Gerais)
Abstract The Horto-Baratinha (HBD) iron ore deposit is located at the eastern border of Sao Francisco Craton, comprising BIF-hosted high-grade bodies (>60 wt.% Fe) associated with polydeformed quartz-mica-schists, amphibole-schist of Statherian maximum deposition age, enclosed by Statherian granitoids of the Borrachudos Suite and Neoarchean gneiss. All the sequence is crosscut by undeformed dikes and sills of pegmatitic bodies probably formed during Late Ediacaran-Cambrian. The metasedimentary s...
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Published on Jan 3, 2019in Mineralium Deposita 3.37
François Voute3
Estimated H-index: 3
(University of Western Australia),
Steffen Hagemann23
Estimated H-index: 23
(University of Western Australia)
+ 1 AuthorsC. Villanes
In the Pataz-Parcoy district, current mining activity is focused on the mesothermal quartz-carbonate-sulfide veins hosted by the Pataz batholith. Total gold production yielded approximately 8 Moz with grades in the mined ore shoots varying between 7 and 15 g/t Au, and locally reaching up to 120 g/t Au. High-grade ore shoots are extraordinarily enriched in sulfides, representing 10 to 20 modal vol% of the vein. Ore mineralogy is characterized by a complex paragenesis of pyrite, arsenopyrite, gale...
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Published on Jun 1, 2019in Resources Policy 2.69
Sam Ulrich (University of Western Australia), Allan Trench11
Estimated H-index: 11
(University of Western Australia),
Steffen Hagemann23
Estimated H-index: 23
(University of Western Australia)
Abstract Quantitative analysis of publicly reported quarterly cost data from 23 Australian underground gold mines in the period 2014–2017 identifies consistent, statistically significant, relationships between gold grade and costs at the individual mines. Higher gold grades are associated with lower production costs throughout the dataset. The resultant regression lines for individual mines in their simplest mathematical form are a power function ( f(x) = ax b ), where a is the scaling factor an...
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Published on Dec 1, 2018in Economic Geology 3.29
Michael Tedeschi1
Estimated H-index: 1
(University of Western Australia),
Steffen Hagemann23
Estimated H-index: 23
(University of Western Australia),
James Davis1
Estimated H-index: 1
(Georgetown University)
1 Citations Source Cite
Published on Feb 1, 2018in Ore Geology Reviews 3.99
Paul Duuring12
Estimated H-index: 12
(University of Western Australia),
Steffen Hagemann23
Estimated H-index: 23
(University of Western Australia)
+ 1 AuthorsChristian Schindler1
Estimated H-index: 1
(University of Western Australia)
Iron ore deposits hosted by Archean banded iron-formation (BIF) in the Weld Range greenstone belt are representative of most of the documented iron ore deposits in the Yilgarn Craton. They include near-surface, supergene goethitehematite orebodies that overlie and partly modify deeper occurrences of hypogene magnetite and specular hematite ores. The Cenozoic goethite-hematite-rich orebodies in these deposits are unequivocally the product of meteoric fluid alteration affecting BIF in the near-sur...
2 Citations Source Cite
Published on Jan 11, 2018in Mineralium Deposita 3.37
Walter Witt4
Estimated H-index: 4
(University of Western Australia),
Kevin F. Cassidy9
Estimated H-index: 9
(University of Western Australia)
+ 1 AuthorsSteffen Hagemann23
Estimated H-index: 23
(University of Western Australia)
The Yilgarn Craton results from three major mantle input events (at ca 3.0–2.9, 2.8 and 2.7 Ga) that have interacted with > 3.0 Ga continental crust. Zircon geochronology and Sm-Nd isotopic data subdivide the craton into an older Yilgarn proto-craton and the younger, more primitive Eastern Goldfields Superterrane (EGST). Formation of the Kalgoorlie-Kurnalpi Rift (KKR) within the EGST was associated with the 2.7 Ga event, which exploited weakened crust at the eastern margin of the Yilgarn proto-c...
3 Citations Source Cite
Published on Sep 18, 2018in Mineralium Deposita 3.37
Marcelo Godefroy-Rodríguez1
Estimated H-index: 1
(University of Western Australia),
Steffen Hagemann23
Estimated H-index: 23
(University of Western Australia)
+ 1 AuthorsMarco L. Fiorentini21
Estimated H-index: 21
(University of Western Australia)
The Golden Mile and Mount Charlotte deposits in the Kalgoorlie Terrane, Western Australia, display three main mineralization styles: Fimiston, comprised of interconnected shear zones associated with ankerite-pyrite ± hematite- ± magnetite-gold-telluride alteration; Oroya, made up of breccia bodies with V-muscovite-ankerite-pyrite ± pyrrhotite-gold-telluride alteration; and Mount Charlotte, which consists of vein arrays with symmetrical ankerite-sericite-albite-pyrite ± pyrrhotite ± gold alterati...
1 Citations Source Cite
Published on Jul 1, 2018in Ore Geology Reviews 3.99
Carolin Kresse1
Estimated H-index: 1
(Universidade Federal de Minas Gerais),
Lydia Maria Lobato13
Estimated H-index: 13
(Universidade Federal de Minas Gerais)
+ 1 AuthorsRosaline C. Figueiredo e Silva4
Estimated H-index: 4
(Universidade Federal de Minas Gerais)
Abstract Textural, chemical and multiple sulfur isotope analyses of sulfides from the Archean world-class Cuiaba orogenic Au deposit, Quadrilatero Ferrifero district, Brazil, were conducted to track distinct trace element signatures from syngenetic to epigenetic-hydrothermal pyrite types in different host units, and to deduce the nature and source of the mineralizing fluids. Gold mineralization in Cuiaba is hosted in greenschist facies volcanic and sedimentary host rocks belonging to the Archean...
1 Citations Source Cite
Published on May 1, 2018in Contributions to Mineralogy and Petrology 3.63
Thomas Angerer11
Estimated H-index: 11
(University of Innsbruck),
Anthony I.S. Kemp25
Estimated H-index: 25
(University of Western Australia)
+ 4 AuthorsCarlos Villanes1
Estimated H-index: 1
Mississippian arc magmatic suites of the Au-rich Pataz and Cu-dominated Montanitas regions in Peru reveal distinct modes of magmatic-hydrothermal petro- and metallogenesis. The distinction is remarkable due to their broad contemporaneity (336–322 Ma), arc-parallel position, and close distance ( 0 and δ18O of ~ 5.3‰) and assimilated old crust (variously low eHf and δ18O > 5.3‰). The ultimate source of Au in the mineralised Pataz batholith was oxidised (fO2 at FMQ buffer; based on zircon trace che...
1 Citations Source Cite
Published on Apr 1, 2018in Ore Geology Reviews 3.99
Sylvio D. Gomes1
Estimated H-index: 1
(Universidade Federal de Minas Gerais),
Sarah Berger1
Estimated H-index: 1
(University of Western Australia)
+ 5 AuthorsAna-Sophie Hensler4
Estimated H-index: 4
(RWTH Aachen University)
Abstract The Picarrao and Liberdade deposits contain high-grade iron orebodies (>65% Fe) hosted in the Guanhaes Group itabirite, that are associated with pegmatite veins and bodies. Fluid inclusion studies in quartz veins associated with the high-grade orebodies show that medium to high salinities (25–28 wt% NaCl eq.) and temperatures (275–375 °C) fluids are associated with the silica leaching that led to the iron enrichment. Mineral chemistry studies by LA-ICP-MS in the iron oxides demonstrate ...
1 Citations Source Cite
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