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<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Granulite facies metamorphism and charnockite plutonism: examples from the Neoproterozoic Belt of northern Nigeria</title>
<creator>Ferre, E. C.</creator>
<creator>Caby, Renaud</creator>
<contributor>Department of Geology, Southern Illinois University, Carbondale ; Université du Québec</contributor>
<contributor>Géosciences Montpellier ; 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)</contributor>
<source>Proceedings Of The Geologists Association</source>
<identifier>hal-00407196</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00407196</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00407196</source>
<source>Proceedings Of The Geologists Association, 2007, 118 (1), pp.47-54. 〈10.1016/S0016-7878(07)80046-0〉</source>
<identifier>DOI : 10.1016/S0016-7878(07)80046-0</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/S0016-7878(07)80046-0</relation>
<language>en</language>
<subject lang=ro>Nigeria</subject>
<subject lang=ro>Neoproterozoic</subject>
<subject lang=ro>granulite</subject>
<subject lang=ro>charnockite</subject>
<subject>[SDU.STU.PE] Sciences of the Universe [physics]/Earth Sciences/Petrography</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Incipient granulite facies conditions and carnockitization affected metasedimentary formations of northern Nigeria during the early stage of the Late Neo-proterozoic (Pan-African) orogeny. This domain is characterized by recumbent foliations consistent with crustal thickening. Far from the Pan-African plutons, initial Barrovian-type metamorphism (medium temperature) evidenced by kyanite and staurolite inclusions is documented only front garnet cores. This early stage was followed by a temperature increase up to >= 700 C, with decompression coeval with the generation of garnet-cordierite melts and emplacement of garnet granitoid sheets. Hectometric-wide layers of non-retrograded granulites survived conformably within anatexites and S-type garnet-bearing anatectic granites from the Toro area. Temperatures of >= 800 C required for the crystallization of granulites facies rocks at c. 0.7 GPa pressure and coeval dry anatexis, were reached regionally as a result of heat supply from abundant anhydrous monzo-dioritic to noritic magmas injected as metre-wide veins and as stocks and pinions (charnockites, monzodiorites). The available geochronological results suggest a long-lived thermal perturbation (638-585 Ma) in this former continental domain of northern Nigeria rooted by Archaean crust that was later the site of the Jurassic anorogenic magmatism.</description>
<date>2007</date>
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