Upper carboniferous palæogmagnetic pole from the stable Saharan Craton and Gondwana reconstructions

Derder, M. E. M.; Henry, B.; Merabet, N.; Amenna, M.; Bourouis, Seid

doi:10.1016/s0899-5362(01)90110-1

Cited by 15 publications

(13 citation statements)

References 21 publications

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“…The results obtained in this study and in that undertaken in the Bled El Mass region (Reggane basin; Derder et al . 2001b) underline the value of investigating folded areas in cratonic regions.…”

Section: Discussionsupporting

confidence: 75%

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New Moscovian palaeomagnetic pole from the Edjeleh fold (Saharan craton, Algeria)

Derder

Henry²,

Bayou

et al. 2001

Geophysical Journal International

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Summary A palaeomagnetic study was carried out in the Moscovian (∼ 305 Ma) formation in the Edjeleh anticline, the only area where important dips can be observed in the Upper Palaeozoic series of the Illizi basin (Algeria). This study shows the existence of three magnetization components. Two of them are interpreted as Cenozoic and Permian remagnetizations; their poles are 88.8°N, 164.0°E, K = 262, A95 = 3.3° and 43.4°S, 61.7°E, K = 93, A95 = 5.9°, respectively. The third component is determined by both well‐defined ChRMs and remagnetization circles analysis. Its associated fold test is positive and significant. Because the folding started before or during the Autunian, this third component was acquired very early and is very probably the primary magnetization. Its corresponding palaeomagnetic pole (28.3°S, 58.9°E, K = 157, A95 = 4.2°) is close to the poles from the Saharan platform obtained from neighbouring periods. The positive fold test of this study thus validates these previous Upper Palaeozoic poles. This new result is in agreement with the geodynamical model (Matte 1986; Henry et al. 1992), which proposed the occurrence of a large clockwise rotation of Africa during the Carboniferous; such a motion agrees with the Permian Pangaea A2 reconstruction.

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Section: Discussionsupporting

confidence: 75%

“…This datum is not far from a new pole (with both positive reversal and fold tests) of Middle Carboniferous age (26.5°S, 44.7°E, K = 383, A 95 = 4.7°; Fig. 14) determined recently (Derder et al . 2001b) in the Bled El Mass region (near the Ain Ech Chebbi area, Reggane basin).…”

Section: Discussionsupporting

confidence: 59%

New Moscovian palaeomagnetic pole from the Edjeleh fold (Saharan craton, Algeria)

Derder

Henry²,

Bayou

et al. 2001

Geophysical Journal International

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“…That is confirmed for the Stephano‐Autunian Formation by similar directions, dated by a fold test, obtained in the Bechar–Mezarif basins (Merabet et al 2003). However, in some Bashkirian and Moscovian samples (Henry et al 1992; Derder et al 2001a,b), different directions can be observed. These directions correspond to that of the Permian overprint already observed in other studies in Africa (e.g.…”

Section: Palaeomagnetic Analysismentioning

confidence: 98%

“…In the Illizi basin (eastern Algerian Sahara), palaeomagnetic analyses were carried out in Silurian to Albian formations. Palaeomagnetic poles related to primary magnetization were obtained in the upper part of the series: Bashkirian (Derder et al 2001a), Moscovian (Henry et al 1992; Derder et al 2001b), Stephano–Autunian (Henry et al 1992; Derder et al 1994), Upper Triassic – Lower Liassic (Kies et al 1995) and Liassic (Derder et al 2001c). Some of the samples from these sites also show Permian and Cenozoic secondary magnetizations.…”

Section: Introductionmentioning

confidence: 99%

Chemical remagnetizations in the Illizi basin (Saharan craton, Algeria) and their acquisition process

Henry

Merabet

Derder

et al. 2004

Geophysical Journal International

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S U M M A R YDuring remagnetization, chemical changes limited to moderate grain growth from pre-existing single domain (SD) grains do not modify the palaeomagnetic direction carried by these grains. Palaeomagnetic direction from new SD grains, on the contrary, is that of the magnetic field during remagnetization. The resulting direction becomes intermediate between the directions carried by previous and new SD grains, as it appears often in case of a partial magnetic overprint. If the growth of pre-existing grains is more important, these grains become large multidomain (MD) and loose the primary magnetization. Stable magnetization is then only related to the new SD grains, which carry the total remagnetization. In the Illizi basin (Saharan platform), these different cases of partial or total magnetic overprint have been observed, resulting from palaeomagnetic studies of different Palaeozoic and Mesozoic formations.

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“…In fact, the age of most paleomagnetic results are not constrained by any paleomagnetic test as they have been acquired for tabular formations with no conglomerate or intrusive rocks. Several such studies were performed in the Reggane (Daly and Irving, 1983), Illizi Derder et al, 1994Derder et al, , 2001aKies et al, 1995), Abadla (Morel et al, 1981;Merabet et al, 1998) and Tindouf Henry et al, 1999) basins within the Saharan craton, but until recently, the only argument for their age of magnetization acquisition was the fact that their paleomagnetic direction differed according to the age of the formation.…”

Section: Introductionmentioning

confidence: 99%

Autunian age constrained by fold tests for paleomagnetic data from the Mezarif and Abadla basins (Algeria)

Merabet

Henry²,

Kherroubi

et al. 2005

Journal of African Earth Sciences

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Upper carboniferous palæogmagnetic pole from the stable Saharan Craton and Gondwana reconstructions

Cited by 15 publications

References 21 publications

New Moscovian palaeomagnetic pole from the Edjeleh fold (Saharan craton, Algeria)

New Moscovian palaeomagnetic pole from the Edjeleh fold (Saharan craton, Algeria)

Chemical remagnetizations in the Illizi basin (Saharan craton, Algeria) and their acquisition process

Autunian age constrained by fold tests for paleomagnetic data from the Mezarif and Abadla basins (Algeria)

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