Geology of the Enterprise Hydrothermal Nickel Deposit, North-Western Province, Zambia
2014; Volume: 110; Issue: 1 Linguagem: Inglês
10.2113/econgeo.110.1.9
ISSN1554-0774
AutoresPatricia L. Capistrant, M. W. Hitzman, David Wood, Nigel M. Kelly, Gareth T. Williams, Macdonald Zimba, Yvette D. Kuiper, David Jack, Holly J. Stein,
Tópico(s)Radioactive element chemistry and processing
ResumoResearch Article| January 01, 2015 Geology of the Enterprise Hydrothermal Nickel Deposit, North-Western Province, Zambia Patricia L. Capistrant; Patricia L. Capistrant 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA Search for other works by this author on: GSW Google Scholar Murray W. Hitzman; Murray W. Hitzman † 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA †Corresponding author: e-mail, mhitzman@mines.edu Search for other works by this author on: GSW Google Scholar David Wood; David Wood 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Search for other works by this author on: GSW Google Scholar Nigel M. Kelly; Nigel M. Kelly 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA Search for other works by this author on: GSW Google Scholar Gretchen Williams; Gretchen Williams 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Search for other works by this author on: GSW Google Scholar Munshya Zimba; Munshya Zimba 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Search for other works by this author on: GSW Google Scholar Yvette Kuiper; Yvette Kuiper 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA Search for other works by this author on: GSW Google Scholar Doug Jack; Doug Jack 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Search for other works by this author on: GSW Google Scholar Holly Stein Holly Stein 3AIRIE Program, Dept. of Geosciences, Colorado State University, Fort Collins, Colorado 80523-1482 USA4Centre for Earth Evolution and Dynamics (CEED), University of Oslo, 0316 Oslo, Norway Search for other works by this author on: GSW Google Scholar Author and Article Information Patricia L. Capistrant 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA Murray W. Hitzman † 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA David Wood 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Nigel M. Kelly 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA Gretchen Williams 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Munshya Zimba 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Yvette Kuiper 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 USA Doug Jack 2First Quantum Minerals Ltd, Zambia, Plot 3805, Zambia Road, Ndola, Zambia Holly Stein 3AIRIE Program, Dept. of Geosciences, Colorado State University, Fort Collins, Colorado 80523-1482 USA4Centre for Earth Evolution and Dynamics (CEED), University of Oslo, 0316 Oslo, Norway †Corresponding author: e-mail, mhitzman@mines.edu Publisher: Society of Economic Geologists Received: 22 Sep 2013 Accepted: 05 Apr 2014 First Online: 09 Mar 2017 Online ISSN: 1554-0774 Print ISSN: 0361-0128 © 2015 Society of Economic Geologists. Economic Geology (2015) 110 (1): 9–38. https://doi.org/10.2113/econgeo.110.1.9 Article history Received: 22 Sep 2013 Accepted: 05 Apr 2014 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Patricia L. Capistrant, Murray W. Hitzman, David Wood, Nigel M. Kelly, Gretchen Williams, Munshya Zimba, Yvette Kuiper, Doug Jack, Holly Stein; Geology of the Enterprise Hydrothermal Nickel Deposit, North-Western Province, Zambia. Economic Geology 2015;; 110 (1): 9–38. doi: https://doi.org/10.2113/econgeo.110.1.9 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEconomic Geology Search Advanced Search Abstract The Enterprise nickel deposit (40 Mt of 1.07% Ni) is located on the eastern edge of the Kabompo dome in the North-Western Province of Zambia. The deposit area contains basement schists overlain by Neoproterozoic metasedimentary rocks. Nickel sulfides are hosted within a sequence of quartz-, carbonate-, and carbon-rich metasedimentary rocks that interfinger with and overlie siliciclastic metasedimentary rocks. The host rocks contain significant kyanite, talc, and magnesian chlorite. Silicification and magnesian metasomatism occurred prior to or concurrent with a regional metamorphic event (590–500 Ma). Mineralization resulted in the precipitation of nickel and iron-nickel sulfides in veins and as semimassive replacements of the host rocks. Nickel sulfides precipitated in two main stages: a millerite-vaesite-pyrite assemblage that formed disseminations and semimassive replacements in vuggy textured rocks, and a later millerite-bravoite-(molybdenite) assemblage in quartz-kyanite veins and local semimassive replacements. The deposit contains minor copper and trace amounts of cobalt and platinum group elements (PGEs). A discrete zone of copper sulfides underlies a portion of the nickel sulfide zone. Re-Os geochronology on molybdenite yields a 540.6 ± 1.8 Ma age for mineralization at Enterprise, the approximate age of metamorphism. Sulfur isotope results indicate that the sulfur at Enterprise was derived largely from Neoproterozoic marine sulfate by thermochemical sulfate reduction. Significant volumes of mafic igneous rocks are not present in the immediate area of the Enterprise deposit. No evidence of prealteration concentrations of nickel exists within the sedimentary rock sequence at the deposit. The alteration and mineralization style of the Enterprise deposit is similar to the much less metamorphosed nickel-bearing Shinkolobwe uranium deposit in the Democratic Republic of Congo (DRC), though the Enterprise deposit does not contain significant uranium. The sediment-hosted nickel-rich deposits of Central African Copperbelt exemplified by Enterprise appear to represent a new style of hydrothermal nickel mineralization. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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