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Perkoa Deposit

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Journal Article
Journal: Economic Geology
Published: 01 November 2003
Economic Geology (2003) 98 (7): 1463–1485.
...M. O. Schwartz; F. Melcher Abstract The massive sulfide deposit at Perkoa in Burkina Faso is the only one of its kind in the Paleoproterozoic Birimian Supergroup of West Africa. The estimated ore reserves are 5.7 Mt with 18.2 percent Zn, 10 percent BaSO 4 , 0.06 percent Pb, and 26 ppm Ag (50 ppm Cu...
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F ig . 2. Cross sections of the <span class="search-highlight">Perkoa</span> <span class="search-highlight">deposit</span>. Evidence
      presented in...
Published: 01 November 2003
F ig . 2. Cross sections of the Perkoa deposit. Evidence presented in this paper suggests that the sequence is overturned. Note that the schematic borehole intersections with granitoid rock (0.2–5 m thick) are only shown in cross sections 10075 and 9975; these granitoid
Image
F ig . 3. Longitudinal section of the <span class="search-highlight">Perkoa</span> <span class="search-highlight">deposit</span> with
isopachs of the t...
Published: 01 November 2003
F ig . 3. Longitudinal section of the Perkoa deposit with isopachs of the thickness of the main orebody with a cutoff of 11 percent Zn, based on unpublished reports for the Bureau des Mines et de la Géologie du Burkina ( Peñarroya Ltd., 1986 ; Boliden Ltd., 1991 ). The vertical projection plane
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The timing of major Zn mineralizing events in Australia compared to events ...
Published: 01 September 2006
), TH = Trans-Hudson, U = Uralides, and US = Upper Silesia. BHT = Broken Hill-, MIT = Mount Isa-, MVT = Mississippi Valley-type, VHMS = VHMS deposits. Data are from Leach et al. (2005) , Franklin et al. (2005) , and this study, with data for the Perkoa deposit from Schwartz and Melcher (2003
Journal Article
Journal: Economic Geology
Published: 01 November 1993
Economic Geology (1993) 88 (7): 1862–1879.
..., and the Perkoa, Gan, Hanhui, and Pilimpikou base metal deposits, are representative of each stage of the so-called Eburnean evolution. The study was completed by an analysis of gold deposits in the French Guianan Shield, which is a rifted remnant correlative of the West African craton.The isotopic compositions...
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F ig . 14. Triangular plot of the composition of zincian spinel
from <span class="search-highlight">Perkoa</span>...
Published: 01 November 2003
F ig . 14. Triangular plot of the composition of zincian spinel from Perkoa. The compositional fields of zincian spinel from pegmatite and granite (solid line; Spry and Scott, 1986 ; Morris et al., 1999 ) and metamorphosed VHMS deposits (interrupted line; Spry and Scott, 1986 ) are shown
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F ig . 1. Geological map of West Africa, with localities
      mentioned in...
Published: 01 November 2003
F ig . 1. Geological map of West Africa, with localities mentioned in the text. (Schwartz, M.O., Toloczyki, M., and Souto-Otero, K., Base metals in the Lower and Middle Precambrian of West Africa, Map 1:2,000,000: Geologisches Jahrbuch, in prep). Inset: Perkoa-Poura region
Journal Article
Journal: Economic Geology
Published: 01 January 2017
Economic Geology (2017) 112 (1): 99–122.
... have steep dips, which are the result of compressional deformation and consequent isoclinal folding during Eburnean compression. The Boromo-Goren belt hosts several types of mineral deposit ( Milesi et al., 1992 ), including a Zn-Ag massive sulfide deposit at Perkoa ( Marcoux et al., 1988 ; Napon...
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Journal Article
Journal: Economic Geology
Published: 01 August 2004
Economic Geology (2004) 99 (5): 917–939.
... known from the Scandinavian Shield ( Bowie et al, 1978 ). The Scandinavian deposits are distinguished from the Falémé deposits by postore metamorphism and, possibly, by a premetamorphic sedimentary origin ( Schneiderhöhn, 1962 , p. 318–320; Frietsch, 1973 ). Unlike the massive sulfide ore at Perkoa...
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Journal Article
Journal: Economic Geology
Published: 01 May 2010
Economic Geology (2010) 105 (3): 571–591.
... from the Wawa subprovince of the Superior craton ( Franklin et al., 1981 ). After 2400 Ma, however, barite and other sulfate minerals become increasingly important. The ~2195 Ma Perkoa deposit in Burkino Faso contains significant quantities of barite ( Schwartz and Melcher, 2003 ), and the 1900...
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Journal Article
Published: 01 April 2005
The Canadian Mineralogist (2005) 43 (2): 601–622.
.... & Robinson , P. ( 1987 ): Mineral chemistry and metasomatic growth of aluminous enclaves in gedrite–cordierite gneiss from southwestern New Hampshire, USA . J. Petrol . 28 , 1033 – 1073 . Schwartz , M.O. & Melcher , F. ( 2003 ): The Perkoa zinc deposit, Burkina Faso . Econ. Geol...
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Journal Article
Journal: Economic Geology
Published: 01 September 2006
Economic Geology (2006) 101 (6): 1117–1157.
...), TH = Trans-Hudson, U = Uralides, and US = Upper Silesia. BHT = Broken Hill-, MIT = Mount Isa-, MVT = Mississippi Valley-type, VHMS = VHMS deposits. Data are from Leach et al. (2005) , Franklin et al. (2005) , and this study, with data for the Perkoa deposit from Schwartz and Melcher (2003...
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Journal Article
Published: 01 March 2006
Bulletin de la Société Géologique de France (2006) 177 (2): 105–121.
... ). In some limited areas, a late Palaeoproterozoic conglomerate deposition unconformably overlying the Birimian terrains is defined as the “Tarkwaian” System [ Junner, 1940 ]. The Katiola-Marabadiassa region is representative of the Man Shield lithology, as it shows the three major Birimian formations (fig...
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Journal Article
Journal: Economic Geology
Published: 01 January 2017
Economic Geology (2017) 112 (1): 145–168.
... on gold mineralisation events in the Meso- to Neoarchaean Storø greenstone belt, Storø, southern West Greenland : Precambrian Research , v. 200–203 , p. 149 – 162 . Schwartz M.O. Melcher F. , 2003 , The Perkoa zinc deposit, Burkina Faso : Economic Geology , v. 98 , p. 1463 – 1485...
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Journal Article
Journal: SEG Discovery
Published: 01 October 2008
SEG Discovery (2008) (75): 1–56.
...-Cu Symposium, Xi an, China Rockville, Maryland 51 Hydrothermal Ore Deposits Course, Ottawa, Canada 51 Northwest Mining Association, Reno, Nevada FOR CONTRIBUTORS 51 9th National Conference on Mineral Resources of China 55 AME BC-SEG pre-Meeting Short Course at Roundup 2009 (inside back cover...
Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP424.5
EISBN: 9781862399563
... preservation of VMS deposits followed by synorogenic lode gold mineralization shortly thereafter in recently accreted sequences (e.g. West Africa (Perkoa and Afema), Baltica (Boliden and Bjorkdal) and Laurentia (Flin Flon and New Britannia)). Ultimately, closure of the Manikewan interior ocean led...
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Journal Article
Journal: SEG Discovery
Published: 01 October 2011
SEG Discovery (2011) (87): 1–48.
... been nature of copper occurrences led early explorers to the conclusion that copper was either syngenetic, i.e., emplaced during deposition of the host known to exist in the Namibian sector of the belt, par- strata, or diagenetic, i.e., emplaced into the host strata during burial and compaction...