The Syenite–Carbonatite Complex of Ihouhaouene (Western Hoggar, Algeria): Interplay Between Alkaline Magma Differentiation and Hybridization of Cumulus Crystal Mushes
| العنوان: | The Syenite–Carbonatite Complex of Ihouhaouene (Western Hoggar, Algeria): Interplay Between Alkaline Magma Differentiation and Hybridization of Cumulus Crystal Mushes |
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| المؤلفون: | A. Djeddi, F. Parat, J.-L. Bodinier, K. Ouzegane, J.-M. Dautria |
| المساهمون: | Laboratoire de Biologie du Développement (LBD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Université Mohammed VI Polytechnique [Ben Guerir] (UM6P), Faculté des Sciences de la Terre, de la Géographie et de l'Aménagement du Territoire (FSTGAT), Université des Sciences et de la Technologie Houari Boumediene = University of Sciences and Technology Houari Boumediene [Alger] (USTHB), Chauvet, Alain, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS), Mohammed VI Polytechnic University [Marocco] (UM6P), Université des Sciences et de la Technologie Houari Boumediene [Alger] (USTHB), Université des Antilles et de la Guyane (UAG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université Mohammed VI Polytechnique |
| المصدر: | Frontiers in Earth Science Frontiers in Earth Science, 2021, 8, ⟨10.3389/feart.2020.605116⟩ Frontiers in Earth Science, Frontiers Media, 2021, 8, ⟨10.3389/feart.2020.605116⟩ Frontiers in Earth Science, Vol 8 (2021) |
| بيانات النشر: | HAL CCSD, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Hoggar, 010504 meteorology & atmospheric sciences, Geochemistry, [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, [SDU.STU.PE] Sciences of the Universe [physics]/Earth Sciences/Petrography, 010502 geochemistry & geophysics, 01 natural sciences, Apatite, [SDU] Sciences of the Universe [physics], chemistry.chemical_compound, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, hybrid mineral aggregates, Silicate minerals, lcsh:Science, Pegmatite, 0105 earth and related environmental sciences, Calcite, carbonatite, Silicate, alkaline magma, chemistry, [SDU]Sciences of the Universe [physics], visual_art, Carbonatite, visual_art.visual_art_medium, [SDU.STU] Sciences of the Universe [physics]/Earth Sciences, General Earth and Planetary Sciences, Carbonate, syenite, lcsh:Q, Igneous differentiation |
| الوصف: | The 2 Ga-old Ihouhaouene alkaline complex (Western Hoggar, Algeria) is among the oldest known carbonatite occurrences on Earth. The carbonatites are calciocarbonatites hosted by syenites, the predominant rock type in the complex. Both rock types are characterized by medium-grained to pegmatitic textures and contain clinopyroxene, apatite, and wollastonite, associated with K-feldspar in syenites and a groundmass of calcite in carbonatites. The rock suite shows a continuous range of compositions from 57–65 wt.% SiO2 and 0.1–0.4 wt.% CO2 in red syenites to 52–58 wt.% SiO2 and 0.1–6.5 wt.% CO2 in white syenites, 20–35 wt.% SiO2 and 11–24 wt.% CO2 in Si-rich carbonatites (>10% silicate minerals), and 2 and 24–36 wt.% CO2 in Si-poor carbonatites (50), whereas clinopyroxene was precipitated from silicate liquids characterized by lower LREE/HREE (Ce/Lu = 49–234) and variable Nb/Ta ratios (Nb/Ta = 2–30). The Si-poor carbonatites resemble the Si-rich carbonatites and the white syenites with elevated REE contents in apatite equilibrium melts compared to clinopyroxene. However, apatite equilibrium melt in Si-poor carbonatite shows a majority of subchondritic values (Nb/Ta |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2296-6463 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0f6fc3557e6282d65bd878a717bfd6eTest https://hal.science/hal-03393752Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c0f6fc3557e6282d65bd878a717bfd6e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 22966463 |
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