Manioc : Portail | resultats 1 - 20 pour la recherche: Costa, Clovis F.M.

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
The Madeira Sn-Nb-Ta deposit corresponds to the albite-enriched facies of Madeira granite (Madeira Suite) that is part of a NE-SW alignment of three granitic bodies. Structural analyses suggest that the albite-enriched granite emplacement and development of related structures occurred in a different tectonic setting than earlier facies of the granitic bodies in the NE-SW alignment and that the structure was dominated by a N-NE-trending shortening related to a left-lateral motion along a NE-SW corridor within a Riedel shear. Three types of structures (flat-lying, near vertical fractures, and geodes/miaroles) concentrated the last magmatic-related fluid in the albite-enriched granite. U-Pb in situ zircon dating of the albite-enriched granite yielded an age of 1,822 ± 22 Ma. The other granitic plutons of the Madeira Suite, Água Boa granite (topaz-granite facies), and Europa per-alkaline granite formed at 1,825 ± 14 Ma, 1,831± 11 Ma, and 1,839 ± 10 Ma, respectively. The granite bodies of the Madeira Suite occur in an area occupied by a cauldron complex composed of volcanic sequences (Iricoumé Group) and associated A-type granites (Mapuera Suite), and their formation was controlled by the reactivation of the cauldron structures and the pre-existing structures. The gap between the cauldron complex and the Madeira Suite is no greater than 35 Ma. The geological evolution was reanalyzed from the perspective of an entire extensional environment where three successive episodes of A-type magmatism and basin formation (Urupi Formation) occurred. The data and interpretations of this work imply crucial constraints on the petrologic models proposed for the albite-enriched granite and, consequently, on the genesis of the Madeira deposit
ISSN: 0301-9268

insu-00939888
https://hal-insu.archives-ouvertes.fr/insu-00939888
https://hal-insu.archives-ouvertes.fr/insu-00939888/document
https://hal-insu.archives-ouvertes.fr/insu-00939888/file/BastosNeto-PrecambrianResearch-2014.pdf
DOI : 10.1016/j.precamres.2013.12.021

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Annuaire de la vie martiniquaise : 1936
Auteur(s) : Sylvestre, Emile (1...-19.. ; fonctionnaire) Lotaut, Eustache
Auteurs secondaires : Eboué, Félix (1884-1944)
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A voyage to the Demerary : containing a statistical account of the settlements there, and of those on the Essequebo, the Berbice, and others contiguous rivers of Guyana
Auteur(s) : Bolingbroke, Henry (1785-1855)
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The history, civil and commercial, of the British colonies in the West Indies. Volume II
Auteur(s) : Edwards, Bryan (1743-1800)
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Géographie complète et universelle : illustrée de 50 gravures, 8 cartes, 5 planches et du portrait de l'auteur. Tome septième
Auteur(s) : Malte-Brun, Conrad (1775-1826)
Auteurs secondaires : Malte-Brun, Victor-Adolphe (1816-1889)
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The history, civil and commercial, of the British colonies in the West Indies. Volume I
Auteur(s) : Edwards, Bryan (1743-1800)
Auteurs secondaires : Bartolozzi, Francesco (1727-1815) West, Benjamin (1738-1820) Milton, Thomas (1743?-1827)
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Bibliographie d'histoire coloniale : 1900-1930
Auteur(s) : Martineau, Alfred (1859-1945) Roussier, Paul (1882-1965) Tramond, Joannès (1882-1935)
Auteurs secondaires : Congrès international d'histoire coloniale (1 ; 1931 ; Paris)
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Six months in the West Indies
Auteur(s) : Coleridge, Henry Nelson (1798-1843)
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