Sedimentary evolution and stratigraphy of the ~765–740 Ma Kansuki-Mwashya platform succession in the Tenke-Fungurume Mining District, Democratic Republic of the Congo-Reference-Cited by-同舟云学术

Sedimentary evolution and stratigraphy of the ~765–740 Ma Kansuki-Mwashya platform succession in the Tenke-Fungurume Mining District, Democratic Republic of the Congo

Published:2020-07-03 Issue:1-2 Volume:23 Page:69-85
ISSN:2034-1954
Container-title:Geologica Belgica
language:
Short-container-title:Geol. Belg.

Author:

MAMBWE Pascal¹^ORCID,DELPOMDOR Franck²^ORCID,LAVOIE Sébastien³^ORCID,MUKONKI Philippe⁴,BATUMIKE Jacques⁵^ORCID,MUCHEZ Philippe⁶

Affiliation:

1. KU Leuven, Department of Earth & Environmental Sciences, Celestijnenlaan 200E, B-3001 Leuven, Belgium; Tenke Fungurume Mining S.A., Department of Exploration Geology, Route de l’Aéroport, Bâtiment TFM, Commune Annexe, Lubumbashi, Democratic Republic of the Congo.

2. Illinois State Geological Survey, University of Illinois at Urbana-Champaign, 615 E. Peabody Dr, Champaign, IL 61820, United States of America.

3. Tenke Fungurume Mining S.A., Department of Exploration Geology, Route de l’Aéroport, Bâtiment TFM, Commune Annexe, Lubumbashi, Democratic Republic of the Congo.

4. University of Lubumbashi, Department of Geology, 14 Kassapa Road, Lubumbashi, Democratic Republic of the Congo

5. University of Lubumbashi, Department of Geology, 14 Kassapa Road, Lubumbashi, Democratic Republic of the Congo; ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and GEMOC, Department of Earth and Planetary Sciences, Macquarie University, NSW 2109, Australia

6. KU Leuven, Department of Earth & Environmental Sciences, Celestijnenlaan 200E, B-3001 Leuven, Belgium.

Abstract

The origin of the Mwashya Conglomerate at the base of the Mwashya Subgroup in the Lufilian Belt is uncertain since it is considered as either a tectonic or as a sedimentary breccia. At Tenke Fungurume Mining District (TFMD) in the Democratic Republic of the Congo, the Mwashya Conglomerate is marked by an iron-bearing polymictic conglomerate embedded between the Kansuki and Kamoya formations. In this paper, the Kansuki-Mwashya platform succession at TFMD was investigated to shed light on the origin of this conglomerate, the depositional evolution and the tectonostratigraphic framework of the platform. Lithofacies analysis revealed that the Mwashya Conglomerate is a periglacial olistostrome, which was formed around ~765–745 Ma. A pre-Sturtian age for this conglomerate is supported by the Kamoya Formation, which is here interpreted as a post-glacial cap carbonate sequence. The Kansuki-Mwashya platform succession consists of a protected coastal lagoon adjacent to a tidal flat environment, both bordered by a barrier shoal. This paper concludes that the Kansuki-Mwashya platform succession was driven by rifting pulses, occurring gravity flows on instable slope, superimposed upon the ~750–717 Ma long-lasting Sturtian glacial period.

Publisher

Geologica Belgica

Subject

Earth and Planetary Sciences (miscellaneous)

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