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Metal sources for the Katanga Copperbelt deposits (DRC) insights from Sr and Nd isotope ratios

(2014) GEOLOGICA BELGICA. 17(2). p.137-147
Author
Organization
Abstract
The ore deposits of the Central African Copperbelt formed during a multiphase mineralisation process. The basement underlying the Neoproterozoic Katanga Supergroup that hosts the ore, demonstrates the largest potential as metal source. Various ore deposits that formed during different mineralisation phases are taken as case studies, i.e. Kamoto, Luiswishi, Kambove West, Dikulushi and Kipushi (Democratic Republic of Congo, DRC). The Sr and Nd isotopic compositions of gangue carbonates associated with these deposits is determined and compared with those of rocks from several basement units, bordering or underlying the Copperbelt, to infer the metal sources. The mineralising fluid of diagenetic stratiform Cu-Co mineralisation interacted with felsic basement rocks underlying the region. The Co from these deposits is most likely derived from mafic rocks, but this is not observed in the isotopic signatures. Syn-orogenic, stratabound Cu-Co mineralisation resulted mainly from remobilisation of diagenetic sulphides. A limited, renewed contribution of metals from felsic basement rocks might be indicated by the isotope ratios in the western part of the Copperbelt, where the metamorphic grade is the lowest. The mineralising fluid of syn- and post-orogenic, vein-type mineralisations interacted with local mafic rocks, and with felsic basement or siliciclastic host rocks.
Keywords
ZAMBIAN COPPERBELT, LUFILIAN FOLD BELT, NEOPROTEROZOIC SEAWATER, URANIUM MINERALIZATION, REGIONAL CORRELATIONS, NORTHERN ZAMBIA, ORE-DEPOSITS, SHABA ZAIRE, CU DEPOSIT, Zinc, CENTRAL AFRICAN COPPERBELT, Copper, Central Africa, Vein-type deposits, Sediment-hosted deposits, Cobalt

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Citation

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MLA
Van Wilderode, Jorik, et al. “Metal Sources for the Katanga Copperbelt Deposits (DRC) Insights from Sr and Nd Isotope Ratios.” GEOLOGICA BELGICA, vol. 17, no. 2, 2014, pp. 137–47.
APA
Van Wilderode, J., El Desouky, H. A., Elburg, M. A., Vanhaecke, F., & Muchez, P. (2014). Metal sources for the Katanga Copperbelt deposits (DRC) insights from Sr and Nd isotope ratios. GEOLOGICA BELGICA, 17(2), 137–147.
Chicago author-date
Van Wilderode, Jorik, Hamdy A El Desouky, Marlina A Elburg, Frank Vanhaecke, and Philippe Muchez. 2014. “Metal Sources for the Katanga Copperbelt Deposits (DRC) Insights from Sr and Nd Isotope Ratios.” GEOLOGICA BELGICA 17 (2): 137–47.
Chicago author-date (all authors)
Van Wilderode, Jorik, Hamdy A El Desouky, Marlina A Elburg, Frank Vanhaecke, and Philippe Muchez. 2014. “Metal Sources for the Katanga Copperbelt Deposits (DRC) Insights from Sr and Nd Isotope Ratios.” GEOLOGICA BELGICA 17 (2): 137–147.
Vancouver
1.
Van Wilderode J, El Desouky HA, Elburg MA, Vanhaecke F, Muchez P. Metal sources for the Katanga Copperbelt deposits (DRC) insights from Sr and Nd isotope ratios. GEOLOGICA BELGICA. 2014;17(2):137–47.
IEEE
[1]
J. Van Wilderode, H. A. El Desouky, M. A. Elburg, F. Vanhaecke, and P. Muchez, “Metal sources for the Katanga Copperbelt deposits (DRC) insights from Sr and Nd isotope ratios,” GEOLOGICA BELGICA, vol. 17, no. 2, pp. 137–147, 2014.
@article{5733587,
  abstract     = {The ore deposits of the Central African Copperbelt formed during a multiphase mineralisation process. The basement underlying the Neoproterozoic Katanga Supergroup that hosts the ore, demonstrates the largest potential as metal source. Various ore deposits that formed during different mineralisation phases are taken as case studies, i.e. Kamoto, Luiswishi, Kambove West, Dikulushi and Kipushi (Democratic Republic of Congo, DRC). The Sr and Nd isotopic compositions of gangue carbonates associated with these deposits is determined and compared with those of rocks from several basement units, bordering or underlying the Copperbelt, to infer the metal sources. The mineralising fluid of diagenetic stratiform Cu-Co mineralisation interacted with felsic basement rocks underlying the region. The Co from these deposits is most likely derived from mafic rocks, but this is not observed in the isotopic signatures. Syn-orogenic, stratabound Cu-Co mineralisation resulted mainly from remobilisation of diagenetic sulphides. A limited, renewed contribution of metals from felsic basement rocks might be indicated by the isotope ratios in the western part of the Copperbelt, where the metamorphic grade is the lowest. The mineralising fluid of syn- and post-orogenic, vein-type mineralisations interacted with local mafic rocks, and with felsic basement or siliciclastic host rocks.},
  author       = {Van Wilderode, Jorik and El Desouky, Hamdy A and Elburg, Marlina A and Vanhaecke, Frank and Muchez, Philippe},
  issn         = {1374-8505},
  journal      = {GEOLOGICA BELGICA},
  keywords     = {ZAMBIAN COPPERBELT,LUFILIAN FOLD BELT,NEOPROTEROZOIC SEAWATER,URANIUM MINERALIZATION,REGIONAL CORRELATIONS,NORTHERN ZAMBIA,ORE-DEPOSITS,SHABA ZAIRE,CU DEPOSIT,Zinc,CENTRAL AFRICAN COPPERBELT,Copper,Central Africa,Vein-type deposits,Sediment-hosted deposits,Cobalt},
  language     = {eng},
  number       = {2},
  pages        = {137--147},
  title        = {Metal sources for the Katanga Copperbelt deposits (DRC) insights from Sr and Nd isotope ratios},
  volume       = {17},
  year         = {2014},
}

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