Title of article :
The Archean Granitoid-Paleoproterozoic Unconformity: Superimposition of Alteration Events in Archean Granitoids, Gabon
Author/Authors :
Mouélé، نويسنده , , Idalina Moubiya and Dudoignon، نويسنده , , Patrick and Albani، نويسنده , , Abderrazak El and Martin، نويسنده , , Hervé and Paquette، نويسنده , , Jean-Louis and Cuney، نويسنده , , Michel and Gauthier-Lafaye، نويسنده , , François، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
4
From page :
598
To page :
601
Abstract :
The Archean granitoids of the South Gabon, dated from 3.0-to-2.5 Ga, were examined along the Archean-Proterozoic unconformity. The petrography was based on mineralogical identification using electron microscopy, X-ray diffraction, and the electron microprobe. The geochemistry was based on chemical analyses of major and trace elements, and on isotopic dating. Results of this work show that the granitoids have been affected by superimposed chloritization and illitization events that were dated by monazite U-Th-Pd isotopic data. The granitic basement shows three superimposed alteration events: 3.0-2.9 Ga primary magmatic event, 2.6 Ga propylitic, and a late oxic 1.9 Ga diagenetic event.
Keywords :
alteration , Clay minerals , Isotopic dating , Franceville Basin , Archean granite
Journal title :
Procedia Earth and Planetary Science
Serial Year :
2013
Journal title :
Procedia Earth and Planetary Science
Record number :
2320608
Link To Document :
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