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Blackridge thrust fault

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Journal Article
Published: 01 June 2018
South African Journal of Geology (2018) 121 (2): 157–170.
...N.A. Vafeas; L.C. Blignaut; K.S. Viljoen; S. Meffre Abstract The manganese ore of the Hotazel Formation in the Kalahari Manganese Field, which has been thrust along the Blackridge thrust fault, has been subjected to various degrees of pre-thrusting hydrothermal and post-thrusting supergene...
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Geophysical interpretation of the Mukulu area, indicating the position of t...
Published: 01 June 2019
Figure 2. Geophysical interpretation of the Mukulu area, indicating the position of the major Blackridge thrust fault, as well as secondary thrusted, normal fault-bound packages of Hotazel Formation ( Vafeas et al., 2018b ).
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Geophysical interpretation of an aeromagnetic survey illustrating major and...
Published: 01 June 2018
Figure 2. Geophysical interpretation of an aeromagnetic survey illustrating major and minor tectonic thrust faults in the study area, as well as secondary thrusted stratigraphic packages, bound by pre-thrusting normal faults. Secondary thrusting is confined to the west of the Blackridge thrust
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Tera-Wasserburg plots of the LA-ICP-MA analyses of apatite within borehole ...
Published: 01 June 2018
Figure 9. Tera-Wasserburg plots of the LA-ICP-MA analyses of apatite within borehole samples MU122-83A-1, MU122-83A-2 and MU133-71B-1 from the thrusted manganese ore above the Blackridge thrust fault in the Kalahari Manganese Field. Errors are shown as bars at the 1σ level to avoid clutter
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Structural representation of the Kalahari Manganese Field, illustrating maj...
Published: 01 June 2019
Figure 1. Structural representation of the Kalahari Manganese Field, illustrating major normal faults, the Blackridge thrust fault and the north-south trending Wessels-Nchwaning graben, as well as the various mines and the Wessels-type/Mamatwan-type ore boundary ( Vafeas et al., 2018a ). Scale
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Geographical and structural interpretation of the Kalahari Manganese Field ...
Published: 01 June 2018
Figure 1. Geographical and structural interpretation of the Kalahari Manganese Field comprising the five erosional relics of the Hotazel Formation and the various operating and historical mines in the region (A). The prominent Blackridge thrust fault is illustrated to extensively transect
Journal Article
Published: 01 June 2019
South African Journal of Geology (2019) 122 (2): 237–248.
...Figure 2. Geophysical interpretation of the Mukulu area, indicating the position of the major Blackridge thrust fault, as well as secondary thrusted, normal fault-bound packages of Hotazel Formation ( Vafeas et al., 2018b ). ...
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Journal Article
Published: 01 June 2019
South African Journal of Geology (2019) 122 (2): 187–220.
... in the east and KL in the west. The map trace of the KhL corresponds closely with the position of the Blackridge thrust fault as defined by Beukes and Smit (1987) , whereas the KL may well represent a suture zone between two crustal plates (e.g., Corner and Durrheim, 2018 ). Although beyond the scope...
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Journal Article
Journal: Geology
Published: 28 October 2019
Geology (2020) 48 (1): 44–48.
... for almost 350 km along strike, occurs in Griqualand West, South Africa. It is best preserved east of the Blackridge thrust, where oxidized paleoweathering profiles are developed below the unconformity at the base of Mapedi-Gamagara red beds. In the Maremane Dome, the red beds preserve pisolitic hematite...
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Journal Article
Journal: Geology
Published: 02 October 2019
Geology (2019) 47 (12): 1131–1135.
... developed on the unconformity (e.g., Hekpoort paleosol) ( Beukes et al., 2002 ). In Griqualand West, the unconformity west of a major north-south–oriented fault (Blackridge thrust; Fig. 1 ) is overlain by hematite-pebble conglomerates and red beds, whereas to the east, it is associated with Fe-rich...
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Journal Article
Published: 01 March 2023
South African Journal of Geology (2023) 126 (1): 75–92.
... ). These sedimentary rocks of the Olifantshoek Group are well preserved, having generally only been affected by variably very low- to low-grade metamorphism (e.g. Moen, 2006 ). These rocks occur in the hanging-wall of a prominent low-angle thrust fault structure (i.e., the Blackridge Thrust) that has been interpreted...
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Journal Article
Published: 01 June 2004
South African Journal of Geology (2004) 107 (1-2): 13–32.
... at the Blackridge thrust near the base of the Olifantshoek Supergroup are incorrect and that the eastern limit of the Kheis domain is actually the Dabep fault. Moen’s re-interpretation of the geology demonstrates that rocks of the Olifantshoek Supergroup predate the Kheisian tectonic fabric with the result...
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Journal Article
Published: 01 March 2022
South African Journal of Geology (2022) 125 (1): 61–78.
... ( Thomas et al., 1994a ; Cornell et al., 2006 ; Macey et al., 2018 ; Van Schijndel et al., 2020 ) should be combined into the Kheis Terrane as a single fault-bounded rock body that comprises the rocks of the Keis supergroup, bordered by the Blackridge thrust in the east, the Kalahari line ( Hutchins...
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