Geochemistry and Tectonic Setting of Mafic Igneous Units in the Neoproterozoic Katangan Basin, Central Africa: Implications for Rodinia Break-up

Kampunzu, A.B.; Tembo, F.; Matheis, G.; Kapenda, D.; Huntsman-Mapila, P.

doi:10.1016/s1342-937x(05)70093-9

Cited by 72 publications

(49 citation statements)

References 72 publications

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“…880 Ma ago (Porada and Berhorst, 2000). According to Kampunzu et al (2000), this rifting led to the formation of a young oceanic crust and was accompanied by magmatism witnessed by the Kafue rhyolite, the Nchanga granite and the Lusaka granite dated, respectively, at 879 Ma (Hanson et al, 1994), 877 Ma (Porada and Berhorst, 2000) and 865 Ma (Barr et al, 1977). This could correspond to the Lusaka folding event described by Cahen et al (1984).…”

Section: Neoproterozoic Katangan (Lufilian) Beltmentioning

confidence: 99%

U–Pb and Hf-isotope analyses of zircon from the Kundelungu Kimberlites, D.R. Congo: Implications for crustal evolution

Batumike

O’Reilly

Griffin

et al. 2007

Precambrian Research

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The Gungwania and Talala kimberlitic pipes on the Kundelungu Plateau (Katanga, SE Congo) have been used as drillholes, to obtain crustal zircons for a study of crustal evolution in the region and to constrain the age of the basement and the sedimentary provenance of the Katangan Supergroup. Two hundred and twenty-nine zircon grains were analysed for U-Pb ages and Hf-isotope compositions. Juvenile Mesoarchean (∼3.4-3.3 Ga) crust in the region underwent recycling during Neoarchean and Paleoproterozoic time. The Paleoproterozoic event involved little production of juvenile crust, and this Paleoproterozoic crust was recycled during Mesoproterozoic and Neoproterozoic time. Both the Mesoproterozoic and Neoproterozoic were characterised by bimodal magmatism reflecting extension, linked with the break up of Rodinia and the opening of the Katangan basin, and the development of juvenile crust. Detailed studies of the external morphology of the zircons in different age groups suggest that the basement beneath the Kundelungu region is predominantly Paleoproterozoic in age; other zircon populations may be derived from the Katangan sediments. The absence of any zircons younger than 560 Ma supports deposition of the Biano Subgroup, which hosts the kimberlites, during the Pan-African Lufilian orogeny. The Archean Congo and Zimbabwe cratons, the Paleoproterozoic Ubendian Belt (Bangweulu Block), the Paleo-to-Mesoproterozoic Irumide Belt, the Mesoproterozoic Kibaran Belt and the Choma Kalomo Block may all have contributed material to the sediments of the Katangan Supergroup.

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Section: Neoproterozoic Katangan (Lufilian) Beltmentioning

confidence: 99%

U–Pb and Hf-isotope analyses of zircon from the Kundelungu Kimberlites, D.R. Congo: Implications for crustal evolution

Batumike

O’Reilly

Griffin

et al. 2007

Precambrian Research

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“…These units reflect continued basin development that lead to proto-10 oceanic rifting of Afar/Red Sea type (Kampunzu et al, 1991(Kampunzu et al, , 2000Tembo et al, 1999;Porada and Berhorst 2000;Key et al, 2001;Batumike et al, 2007). Widespread small gabbroic to dioritic sills and dykes occur in the Katangan Supergroup (Fig.…”

Section: Regional Geodynamic Contextmentioning

confidence: 92%

“…Widespread small gabbroic to dioritic sills and dykes occur in the Katangan Supergroup (Fig. 2, 3), in particular in the Upper Roan and lowermost Nguba Groups (Kampunzu et al, 2000). These mafic bodies are constrained between c. 735 and 765 Ma (Key et al, 2001;Barron et al, 2003), also presenting an approximate age for the extensional tectonics associated with this rifting phase (Buffard 1988;Tembo et al, 1999;Kampunzu et al, 2000;Batumike et al, 2007).…”

Section: Regional Geodynamic Contextmentioning

confidence: 99%

“…2, 3), in particular in the Upper Roan and lowermost Nguba Groups (Kampunzu et al, 2000). These mafic bodies are constrained between c. 735 and 765 Ma (Key et al, 2001;Barron et al, 2003), also presenting an approximate age for the extensional tectonics associated with this rifting phase (Buffard 1988;Tembo et al, 1999;Kampunzu et al, 2000;Batumike et al, 2007). 15 Inversion from extensional to compressional tectonics during the Pan-African orogeny led to formation of the northward convex Lufilian oroclinal belt (Cosi et al, 1992;Kampunzu and Cailteux 1999;Porada and Berhorst 2000).…”

Section: Regional Geodynamic Contextmentioning

confidence: 99%

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Non-cylindrical parasitic folding and strain partitioning during the Pan-African Lufilian orogeny in the Chambishi-Nkana Basin, Central African Copperbelt

Torremans¹,

Muchez²,

Sintubin³

2018

Preprint

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Abstract.A structural analysis has been carried out along the southeast margin of the Chambishi-Nkana Basin in the Central African Copperbelt, hosting the world-class Cu-Co Nkana orebody. The geometrically complex structural architecture is interpreted to have been generated during a single NE-SW oriented compressional event, clearly linked to the Pan-African Lufilian orogeny. This progressive deformation resulted primarily in asymmetric multiscale parasitic fold assemblages, 5 characterized by non-cylindrical NW-SE elongated, periclinal folds that strongly interfere laterally, leading to fold linkage and bifurcation. The vergence and amplitude of these folds consistently reflect their position along an inclined limb of a NW plunging megascale first-order fold. A clear relation is observed between development of parasitic folds and certain lithofacies assemblages in the Copperbelt Orebody Member, which hosts most of the ore. Differences in fold amplitude, wavelength and shape are explained by changes in mechanical stratigraphy caused by lateral lithofacies variation in ore-bearing horizons. In 10 addition, strong differences in strain partitioning occur within the deforming basin, which is interpreted to be in part controlled by changes in mechanical anisotropy in the layered rock package. This work provides an essential backdrop to understand the influence of the Lufilian orogeny on metal mineralization and (re−)mobilization in the Copperbelt.

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“…The uppermost part of the dolomites in the DRC, the Kansuki Formation, contains silica-poor volcanic rocks that extend into Zambia as the basaltic to andesitic Lwavu volcanics (Key et al 2001). These DRC volcanic rocks have been interpreted as having been erupted in a continental rift environment (Kampunzu et al 1993(Kampunzu et al , 2000Tembo et al 1999;Cailteux et al 2007). The overlying Mwashia Subgroup (Mwashya Subgroup) either overlies the Kirilabombwe Subgroup transgressively or structurally overlies it along a thrust (Porada and Berhorst 2000).…”

Section: Evolution From Rifting To Spreadingmentioning

confidence: 99%

Comparative Stratigraphic and Geochronological Evolution of the Northern Damara Supergroup in Namibia and the Katanga Supergroup in the Lufilian Arc of Central Africa

Miller

2013

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The Damara Supergroup in Namibia and the Katanga Supergroup in the Central African Copperbelt (some 1000 km apart) are characterized by rock successions indicative of almost coeval orogenic evolution through phases of intracontinental rifting, spreading, continental rupture, subduction, ocean closure and continental collision in what appears to have been a single, elongate orogenic belt. Rifting began at about 880 Ma and lasted until about 800 or 756 Ma. Post-rift thermal sag and marine transgression produced the first correlatable stratigraphic units, the argillaceous Beesvlakte and Ore Shale Formations, in northern, carbonate-dominated platformal successions on the Damaran Northern Platform and the Katangan Lufilian Arc or Fold Belt, respectively. Sturtian (~735 Ma) and Marinoan (635 Ma) glacial units are common to both successions as well as syntectonic molasse sequences (~595–550 Ma). Continental collision occurred at about 542 Ma and the post-tectonic peak of regional metamorphism was at about 535–530 Ma. Mineral ages record cooling to about 460 Ma. The extensive occurrence of stratabound, but not stratiform, copper mineralization, evaporitic minerals, salt and thrust tectonics, syntectonic breccias, and intense alteration in the Lufilian Arc have no significant equivalents in the Northern Platform. However, the Beesvlakte Formation has both concordant and strongly discordant styles of copper mineralization and the mode of occurrence of mineralization in the Copperbelt can be a guide to exploration in Namibia.SOMMAIRELe Supergroupe de Damara en Namibie et le Supergroupe de Katanga de la bande cuprifère d’Afrique centrale (distant de 1 000 km) sont caractérisés par des successions de roches montrant une évolution orogénique presque contemporaines dans leurs phases de distension intracontinentale, d’expansion, de rupture continentale, de subduction, de fermeture océanique et de collision continentale, dans ce qui semble avoir été une seule et même bande orogénique étroite. La distension a débutée il y a environ 880 Ma et s’est prolongé jusqu’à 800 Ma ou 756 Ma. Le fléchissement thermique post-distension et la transgression marine ont donné les premières unités stratigraphiques corrélables, soit la Formation argileuse de Beesvlakte et la Formation de Ore Shale, de la portion nord des successions de plateforme principalement carbonatées sur la Plateforme nord de Damaran et de l’Arc ou de la bande plissée de Katangan Lufilian respectivement. Les unités glaciaires de Sturtian (~735 Ma) et de Marinoan (635 Ma) sont communes aux deux successions, tout comme les séquences de molasses syntectoniques (~595–550 Ma). La collision continentale s’est produite il y a environ 542 Ma et le pic post-tectonique de métamorphisme régional a eu lieu il y a environ 535 à 530 Ma. Selon les datations minérales, le refroidissement s’est produit il y a environ 460 Ma. La prépondérance du contexte stratoïde plutôt que stratiforme des minéralisations de cuivre, des minéraux d’évaporites, de sel et de tectonique de compression, de brèches syntectoniques, et d’altération intense dans l’Arc de Lufilian, n’a pas d’équivalent dans la plateforme du nord. Cependant, la Formation de Beesvlakte présente des minéralisations de cuivre qui sont ou concordantes, ou fortement discordantes, et le mode d’occurrence de la minéralisation dans le bande cuprifère peut servir de guide à l’exploration en Namibie.

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Geochemistry and Tectonic Setting of Mafic Igneous Units in the Neoproterozoic Katangan Basin, Central Africa: Implications for Rodinia Break-up

Cited by 72 publications

References 72 publications

U–Pb and Hf-isotope analyses of zircon from the Kundelungu Kimberlites, D.R. Congo: Implications for crustal evolution

U–Pb and Hf-isotope analyses of zircon from the Kundelungu Kimberlites, D.R. Congo: Implications for crustal evolution

Non-cylindrical parasitic folding and strain partitioning during the Pan-African Lufilian orogeny in the Chambishi-Nkana Basin, Central African Copperbelt

Comparative Stratigraphic and Geochronological Evolution of the Northern Damara Supergroup in Namibia and the Katanga Supergroup in the Lufilian Arc of Central Africa

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