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Magma flow revealed by magnetic fabric in the Okavango giant dyke swarm, Karoo igneous province, northern Botswana

Autor: G. Tshoso, Charles Aubourg, Ali B Kampunzu, Jérôme Dyment, H. Bertrand, M. Modisi, Jean-Jacques Tiercelin, B. Le Gall

Publikováno v: Journal of Volcanology and Geothermal Research
Journal of Volcanology and Geothermal Research, Elsevier, 2008, 170 (3-4), pp.247-261. ⟨10.1016/j.jvolgeores.2007.10.013⟩
Journal of Volcanology and Geothermal Research, 2008, 170 (3-4), pp.247-261. ⟨10.1016/j.jvolgeores.2007.10.013⟩

International audience; To determine the magma flow direction of the giant, 179 Ma Okavango dyke swarm of northern Botswana, we measured the anisotropy of magnetic susceptibility (AMS) of 23 dykes. Dykes are located in two sections (Shashe and Thune

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f689ab93354c6d733c5ea22fcfa9f79c
https://doi.org/10.1016/j.jvolgeores.2007.10.013

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40 Ar/ 39 Ar geochronology and structural data from the giant Okavango and related mafic dyke swarms, Karoo igneous province, northern Botswana

Autor: Ali B Kampunzu, M. Modisi, Marcia Maia, Jérôme Dyment, Fred Jourdan, G. Tshoso, Gilbert Féraud, B. Le Gall, Jean-Jacques Tiercelin, Hélène Bertrand

Publikováno v: Earth and Planetary Science Letters
Earth and Planetary Science Letters, Elsevier, 2002, 202 (3-4), pp.595-606 [433]. ⟨10.1016/S0012-821X(02)00763-X⟩
Earth and Planetary Science Letters, 2002, 202 (3-4), pp.595-606 [433]. ⟨10.1016/S0012-821X(02)00763-X⟩

In NE Botswana, the Karoo dykes include a major N110° dyke swarm known as the Okavango giant dyke swarm (ODS/N110°) and a second smaller set of N70° dykes belonging to the Sabi-Limpopo dyke swarm (SLDS/N70°). New 40Ar/39Ar plagioclase dating of K

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea9a70e5284a19949ada7d06ad8e995b
https://doi.org/10.1016/s0012-821x(02)00763-x

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Karoo large igneous province: Brevity, origin, and relation to mass extinction questioned by new 40Ar/39Ar age data

Autor: Hervé Bertrand, Gilbert Féraud, G. Tshoso, Bernard Le Gall, Fred Jourdan, Michael K. Watkeys, Ali Bashira Kampunzu

Publikováno v: Geology
Geology, 2005, 33 (9), pp.745-748. ⟨10.1130/G21632.1⟩
Geology, Geological Society of America, 2005, 33 (9), pp.745-748. ⟨10.1130/G21632.1⟩

The peak activities of continental flood basalts are currently considered as huge and brief (∼1 m.y.) magmatic events, with strong implications for geodynamics and biotic turnover. New 4 0 Ar/ 3 9 Ar dates on the Karoo flood basalts (southern Afric

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b75362ddef9cb2871b1515da7f14eef4
https://hal.science/hal-00113839

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The Okavango giant mafic dyke swarm (NE Botswana): its structural significance within the Karoo Large Igneous Province

Autor: Fred Jourdan, W. Vétel, Jérôme Dyment, Hervé Bertrand, Charly Aubourg, G. Tshoso, Ali B Kampunzu, Bernard Le Gall, Gilbert Féraud

Publikováno v: Journal of Structural Geology
Journal of Structural Geology, 2005, 27 (12), pp.2234-2255. ⟨10.1016/j.jsg.2005.07.004⟩
Journal of Structural Geology, Elsevier, 2005, 27 (12), pp.2234-2255. ⟨10.1016/j.jsg.2005.07.004⟩

The structural organization of a giant mafic dyke swarm, the Okavango complex, in the northern Karoo Large Igneous Province (LIP) of NE Botswana is detailed. This N110°E-oriented dyke swarm extends for 1500 km with a maximum width of 100 km through

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc3545f1ab53b93b40d9681804dfb775
https://hal.science/hal-00112686

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The Karoo triple junction questioned: evidence from Jurassic and Proterozoic Ar-40/Ar-39 ages and geochemistry of the giant Okavango dyke swarm (Botswana)

Autor: Jean-Jacques Tiercelin, G. Tshoso, H. Bertrand, Gilbert Féraud, Fred Jourdan, B. Le Gall, Ali B Kampunzu, P. Capiez

Publikováno v: Earth and Planetary Science Letters
Earth and Planetary Science Letters, Elsevier, 2004, 222 (3-4), pp.989-1006. ⟨10.1016/j.epsl.2004.03.017⟩
Earth and Planetary Science Letters, 2004, 222 (3-4), pp.989-1006. ⟨10.1016/j.epsl.2004.03.017⟩

The lower Jurassic Karoo–Ferrar magmatism represents one of the most important Phanerozoic continental flood basalt (CFB) provinces. The Karoo CFB province is dominated by tholeiitic traps and apparently radiating giant dyke swarms covering altoget

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58469c266fd33c9912913bb561701e78
https://hal.archives-ouvertes.fr/hal-00407325

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