دورية أكاديمية
The Logoualé Band: A large Archean crustal block in the Kenema-Man domain (Man-Leo rise, West African Craton) remobilized during Eburnean orogeny (2.05 Ga)
| العنوان: | The Logoualé Band: A large Archean crustal block in the Kenema-Man domain (Man-Leo rise, West African Craton) remobilized during Eburnean orogeny (2.05 Ga) |
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| المؤلفون: | Kouamelan, Alain Nicaise, Kra, Kouassi Serge Auguste, Djro, Sagbrou Chérubin, Paquette, Jean-Louis, Peucat, Jean-Jacques |
| المساهمون: | Unité de formation - Sciences de la terre et des ressources minières (UFR STRM), Université de Cocody, Laboratoire Magmas et Volcans (LMV), Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Institut de Recherche pour le Développement et la société-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS), Géosciences Rennes (GR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS), French “Fond d'Aide et de Coopération” |
| المصدر: | ISSN: 1464-343X. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2018 |
| المجموعة: | HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand / Université d'Auvergne) |
| مصطلحات موضوعية: | Logoualé Band, Pink gneiss, Leonian, Liberian, Eburnean, Remobilization, Recycling, Zircon U-Pb dating, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
| الوصف: | International audience ; The Archean domain of the Man Rise was strongly remobilized during Eburnean coincidentally with the genesis of the Baoulé-Mossi domain (Birimian). This remobilization has allowed the recycling of Leonian and Liberian formations to generate a large gneissic crust, represented by the Logoualé Band. Zircons dates by laser ablation (LA-ICP-MS) of two samples of biotite-bearing pink gneisses of the Logoualé Band yielded ages of 2709 ± 15 and 2804 ± 11 Ma, confirming the Archean age of the Logoualé Band formations. The Eburnean tectono-metamorphic event in the Logoualé Band has totally reset both U-Th-Pb chronometer with an average age at 2050 ± 16 Ma in recrystallized zones of monazites, and Sm-Nd chronometer of garnets with an age at 2053 ± 15 Ma. Non-recrystallized zones of monazites give an average age at 2712 ± 16 Ma. We propose that the Logoualé Band rocks were originally sediments deposited in some protocratonic rift-type basins. During Eburnean, these sediments were buried, underwent high-grade metamorphism and exhumed in a tectonic context dominated by transcurrent motion. The structural setting of banded iron formations (iron deposits), which are abundant in the Logoualé Band, would date back to the Eburnean. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-01897494; https://hal.uca.fr/hal-01897494Test |
| DOI: | 10.1016/j.jafrearsci.2017.09.004 |
| الإتاحة: | https://doi.org/10.1016/j.jafrearsci.2017.09.004Test https://hal.uca.fr/hal-01897494Test |
| رقم الانضمام: | edsbas.2D675B50 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.jafrearsci.2017.09.004 |
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