TY - JOUR
T1 - Soft sediment deformation structures in the Neoproterozoic Kansuki formation (Katanga Supergroup, Democratic Republic of the Congo)
T2 - evidence for deposition in a tectonically active carbonate platform
AU - Mambwe, Matanda Pascal
AU - Lavoie, Sébastien
AU - Delvaux, Damien
AU - Batumike, Jacques M.
PY - 2019/2
Y1 - 2019/2
N2 - The Neoproterozoic Kansuki Formation in the Katanga Supergroup (Katanga Copperbelt, Democratic Republic of the Congo) mainly consists of platform carbonates with pyroclastic beds and mafic layers. Lithological and sedimentological investigation in the central part of the Katanga Copperbelt (Tenke Fungurume Mining District) evidenced peritidal facies for the carbonate. It also evidenced the presence of Soft Sediment Deformation Structures (SSDS). Small-scale load structures, multiple successions of load cast and flame structures are attributed to discrete sedimentary processes such as overloading and rapid deposition. Tepee-like structures are indicative of a subaerial exposure of the carbonate that was deposited in relatively shallow water. Major SSDS such as boudinage within water escape structures, load cast with attached pseudonodules, tepee-like structures with sheet cracks, small-scale mass displacement, and brecciation are interpreted as triggered by seismicity and indicative of active tectonics during sedimentation in the Katanga basin. This is consistent with the presence of pyroclastic beds and mafic layers within the Kansuki Formation, pointing to carbonate platform deposition in a paleorift.
AB - The Neoproterozoic Kansuki Formation in the Katanga Supergroup (Katanga Copperbelt, Democratic Republic of the Congo) mainly consists of platform carbonates with pyroclastic beds and mafic layers. Lithological and sedimentological investigation in the central part of the Katanga Copperbelt (Tenke Fungurume Mining District) evidenced peritidal facies for the carbonate. It also evidenced the presence of Soft Sediment Deformation Structures (SSDS). Small-scale load structures, multiple successions of load cast and flame structures are attributed to discrete sedimentary processes such as overloading and rapid deposition. Tepee-like structures are indicative of a subaerial exposure of the carbonate that was deposited in relatively shallow water. Major SSDS such as boudinage within water escape structures, load cast with attached pseudonodules, tepee-like structures with sheet cracks, small-scale mass displacement, and brecciation are interpreted as triggered by seismicity and indicative of active tectonics during sedimentation in the Katanga basin. This is consistent with the presence of pyroclastic beds and mafic layers within the Kansuki Formation, pointing to carbonate platform deposition in a paleorift.
KW - Soft sediment deformation structures
KW - Platform carbonate
KW - Peritidal environment
KW - Seismites
KW - Kansuki formation
KW - Central African copperbelt
UR - http://www.scopus.com/inward/record.url?scp=85056468337&partnerID=8YFLogxK
U2 - 10.1016/j.jafrearsci.2018.09.002
DO - 10.1016/j.jafrearsci.2018.09.002
M3 - Article
AN - SCOPUS:85056468337
SN - 1464-343X
VL - 150
SP - 86
EP - 95
JO - Journal of African Earth Sciences
JF - Journal of African Earth Sciences
ER -