The 1750Ma Magmatic Event of the West African Craton (Anti-Atlas, Morocco)

Youbi, Nasrrddine; Kouyaté, Djiky; Söderlund, Ulf; Ernst, Richard E.; Soulaı̈mani, Abderrahmane; Hafid, Ahmid; Ikenne, Moha; Bahat, Abdelhakim El; Bertrand, Hervé; Chaham, Khalid Rkha; Abbou, Mohamed Ben; Mortaji, A.; Ghorfi, Mustapha El; Zouhair, Mohamed; Janati, M’hamed El

doi:10.1016/j.precamres.2013.07.003

Cited by 111 publications

(53 citation statements)

References 85 publications

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“…A second stage of metamorphic overprint is likely to be recorded by the apatites at approximately 730 Ma. Similar ages are known from the eastern margin of the West African Craton (Ennih and Liégeois, 2001;Caby et al, 2008), as well as from the Anti-Atlas (Thomas et al, 2002) and are potentially linked to the final breakup of Rodinia or the initial assembly of Gondwana (Evans, 2009;Bradley, 2011;Youbi et al, 2013). The long range effects of these events presumably also affected the region which is now the eastern Sebkha Matallah unit, and thus, caused partial apatite rejuvenation.…”

Section: Indication Of Mesoproterozoic Tectonic Activity At the Westesupporting

confidence: 54%

History of the West African Neoproterozoic Ocean: Key to the geotectonic history of circum-Atlantic Peri-Gondwana (Adrar Souttouf Massif, Moroccan Sahara)

et al. 2016

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Section: Indication Of Mesoproterozoic Tectonic Activity At the Westesupporting

confidence: 54%

History of the West African Neoproterozoic Ocean: Key to the geotectonic history of circum-Atlantic Peri-Gondwana (Adrar Souttouf Massif, Moroccan Sahara)

et al. 2016

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“…16; see also Larin, 2009;Youbi et al, 2013). Our summary of some prominent events (Table 4) adds three locales not present in other compilations, including the Swift Current Anorogenic Province (location 2; Fig.…”

Section: Origin Of the Mafic Rocksmentioning

confidence: 90%

The Kivalliq Igneous Suite: Anorogenic bimodal magmatism at 1.75Ga in the western Churchill Province, Canada

Peterson

Scott

LeCheminant

et al. 2015

Precambrian Research

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“…This is the case of Northwestern Africa where curved structures are observed in Burkina Faso and Mali [40], consisting of curved elevations surrounding the sedimentary basin of Taoudenni and dike swarms [41] which may directly come from the mantle by injection through the crust. The alleged presence of magmatic dikes, detected with the magnetometer, were also identified in Gambia [42], Western Sahara, Mauritania and Liberia.…”

Section: From Local To Globalmentioning

confidence: 85%

Vortex Theory and Earth Dynamics

Straser¹,

Ferrari²

2016

JGRE

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Morphological evidence in active tectonic areas consisting of subcircular shapes suggests that these geometries may originate from alternative mechanisms to those described by translational dynamics of complex faults. The mechanics behind endogenic forces, in particular convection currents, hasn't been completely explained. Differing in density from upward flows developing in atmosphere and in water, magma upwelling from the mantle can trigger endogenic vortexes in particular conditions and due to Coriolis Force. At their onset and ascent phase, vortexes apply lateral forces as result of rotation, open their way toward the surface and over time stabilize the channel. Opposite to a rising linear flow which compacts overlying materials impeding their surge, vortex flows unload the materials externally and compact them on the lateral surface of the channel, thus making it more regular and stable. Torsional movements on the surface associated to vulcanites, lateral ramps and subcircular elevations, can be observed. Other phenomena that may be consequence of vortex dynamics are the volcanic cones showing pseudo-rotations in the morphologies surrounding the crater. In this study we suggest a modeling for a vortex theory which may explain the Earth dynamics in terms of spiraling movement and magma upwelling stabilizing over time.

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The 1750Ma Magmatic Event of the West African Craton (Anti-Atlas, Morocco)

Cited by 111 publications

References 85 publications

History of the West African Neoproterozoic Ocean: Key to the geotectonic history of circum-Atlantic Peri-Gondwana (Adrar Souttouf Massif, Moroccan Sahara)

History of the West African Neoproterozoic Ocean: Key to the geotectonic history of circum-Atlantic Peri-Gondwana (Adrar Souttouf Massif, Moroccan Sahara)

The Kivalliq Igneous Suite: Anorogenic bimodal magmatism at 1.75Ga in the western Churchill Province, Canada

Vortex Theory and Earth Dynamics

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