Constraining the Chronology of the Mashishing Dykes from the Eastern Kaapvaal Craton in South Africa

Wabo, H.; Humbert, Fabien; Kock, Michiel O. de; Belyanin, G.A.; Maré, L.P.; Beukes, Nicolas J.

doi:10.1007/978-981-13-1666-1_6

Cited by 11 publications

(6 citation statements)

References 46 publications

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“…1). Paleoproterozoic magnetizations that pass reversal and baked-contact tests were reported for the BHDS (Letts et al, 2005(Letts et al, , 2011Lubnina et al, 2010) and are confirmed by combined U-Pb geochronology, geochemistry, and paleomagnetic data sets (Olsson et al, 2016;Wabo et al, 2019). Baddeleyite U-Pb crystallization ages of 12 dikes range between ca.…”

Section: The Black Hills Dike Swarmsupporting

confidence: 56%

“…1.87 and ca. 1.84 Ga (Olsson et al, 2016;Wabo et al, 2019). However, only two dated dikes were also studied paleomagnetically (Lubnina et al, 2010;Wabo et al, 2019).…”

Section: The Black Hills Dike Swarmmentioning

confidence: 99%

“…1.84 Ga (Olsson et al, 2016;Wabo et al, 2019). However, only two dated dikes were also studied paleomagnetically (Lubnina et al, 2010;Wabo et al, 2019). Dike ages do not discriminate between trend or location but subdivide the swarm into an older, 1.88-1.86 Ga, moreprimitive group and a younger, 1.85-1.84 Ga, more chemically enriched group (Olsson et al, 2016).…”

Section: The Black Hills Dike Swarmmentioning

confidence: 99%

“…1848 Ma episode as "young" BHDS. The crystallization age uncertainty of dike LDH of Wabo et al (2019) allows it to be a member of either the 1873 Ma or 1860 Ma episode. Dike CDU of this study (sample BCD5-85 of Olsson et al, 2016) can similarly be a member of either the 1860 Ma or 1848 Ma episode.…”

Section: Magmatic Episodes and Magnetostratigraphymentioning

confidence: 99%

“…1). The 1.87-1.84 Ga northeast-to north-northeast-trending mafic Black Hills dike swarm (BHDS; South Africa) is one such province (Olsson et al, 2016;Wabo et al, 2019). We present new paleomagnetic data from 36 BHDS dikes together with existing data from the 1.89-1.87 Ga Mashonaland sill province (Söderlund et al, 2010;Hanson et al, 2011) and the 1.88-1.87 Ga post-Waterberg sill province (Hanson et al, 2004).…”

Section: Introductionmentioning

confidence: 96%

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Late Paleoproterozoic mafic magmatism and the Kalahari craton during Columbia assembly

Djeutchou

Kock

Wabo

et al. 2021

Geology

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The 1.87–1.84 Ga Black Hills dike swarm of the Kalahari craton (South Africa) is coeval with several regional magmatic provinces used here to resolve the craton’s position during Columbia assembly. We report a new 1850 ± 4 Ma (U-Pb isotope dilution–thermal ionization mass spectrometry [ID-TIMS] on baddeleyite) crystallization age for one dike and new paleomagnetic data for 34 dikes of which 8 have precise U-Pb ages. Results are constrained by positive baked-contact and reversal tests, which combined with existing data produce a 1.87–1.84 Ga mean pole from 63 individual dikes. By integrating paleomagnetic and geochronological data sets, we calculate poles for three magmatic episodes and produce a magnetostratigraphic record. At 1.88 Ga, the Kalahari craton is reconstructed next to the Superior craton so that their ca. 2.0 Ga poles align. As such, magmatism forms part of a radiating pattern with the coeval ca. 1.88 Ga Circum-Superior large igneous province.

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Section: The Black Hills Dike Swarmsupporting

confidence: 56%

“…1.87 and ca. 1.84 Ga (Olsson et al, 2016;Wabo et al, 2019). However, only two dated dikes were also studied paleomagnetically (Lubnina et al, 2010;Wabo et al, 2019).…”

Section: The Black Hills Dike Swarmmentioning

confidence: 99%