The first application of Re-Os dating on Paleoproterozoic Francevillian sediments (Gabon)

被引：1
|
作者：
Ikouanga, Julie Ngwal'ghoubou [1 ]
Reisberg, Laurie [2 ]
Pierson-Wickmann, Anne-Catherine [3 ]
El Khoury, Anna [1 ,4 ]
Fontaine, Claude [1 ]
El Albani, Abderrazak [1 ]
机构：
[1] Univ Poitiers, UMR CNRS 7285, IC2MP, F-86073 Poitiers 9, France
[2] Univ Lorraine, Ctr Rech Petrog & Geochim, UMR CNRS 7358, F-54500 Vandoeuvre Les Nancy, France
[3] Univ Rennes, CNRS, Geosci Rennes UMR 6118, F-35000 Rennes, France
[4] Synchrotron Soleil, Nanoscopium Beamline, F-91192 Gif Sur Yvette, France
来源：
COMPTES RENDUS GEOSCIENCE | 2024年 / 356卷
关键词：
Dating; Re-Os; Francevillian; Paleoproterozoic; Gabon; ORGANIC-MATTER; CLAY-MINERALS; BLACK SHALES; BASIN; PRESERVATION; OSMIUM; GEOCHRONOLOGY; COMPLEXES; DEPOSITS; RHENIUM;
D O I：
10.5802/crgeos.264
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Understanding the age of geological formations is essential to reconstruct Earth's history. Nevertheless, dating Proterozoic formations is a real challenge because they are often impacted by tectonic, magmatic or metamorphic phenomena. The sedimentary sequences of the Francevillian Basin are well preserved and have been dated previously using many methods (U-Pb, Ar-Ar, Rb-Sr,...). Here, we applied the Re-Os dating method for the first time, specifically on the "FB" and "FD" formations containing a high organic matter (OM) content (up to10%). The age obtained, 2103 +/- 11 Ma, is coherent with the previous studies. This data confirms the unusual quality of OM preservation and the chronology of the emergence of multicellular life occurring during the Lomagundi event.
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页数：11
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