Article (Scientific journals)
Contributions of U-Th-Pb dating on the diagenesis and sediment sources of the Lower Group (BI) of the Mbuji-Mayi Supergroup (Democratic Republic of Congo)
François, Camille; Kabamba Baludikay, Blaise; Storme et al.
2017In Precambrian Research
Peer Reviewed verified by ORBi
 

Files


Full Text
francoisetalprecamres2017.pdf
Publisher postprint (5.42 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
U-Pb dating; monazite & xenotime; Proterozoic organic-walled microfossils; Central Africa; LA-ICP-MS; Electron Microprobe
Abstract :
[en] In this paper, we present new age constraints for the lower part of the Meso-Neoproterozoic sedimentary Mbuji-Mayi Supergroup (Democratic Republic of Congo, DRC). This Supergroup preserves a large diversity of organic-walled microfossils, evidencing the diversification of early eukaryotes for the first time in Central Africa. We use different methods such as in situ U-Pb geochronology by LA-ICP-MS and U-Th-Pb chemical datings by Electron Microprobe on diagenetic and detrital minerals such as xenotimes, monazites and zircons. We attempt to better constrain the provenance of the Mbuji-Mayi sediments and the minimum age of the Mbuji-Mayi Supergroup to constrain the age of the microfossils. Results with LA-ICP-MS and EMP provide new ages between 1030 and 1065 Ma for the diagenesis of the lower part of the sedimentary sequence. These results are consistent with data on biostratigraphy supporting the occurrence of worldwide changes at the Mesoproterozoic/Neoproterozoic boundary.
Disciplines :
Earth sciences & physical geography
Author, co-author :
François, Camille ;  Université de Liège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Kabamba Baludikay, Blaise ;  Université de Liège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Storme
Baudet, Daniel;  MRAC
Paquette, JL
Fialin, M
Javaux, Emmanuelle  ;  Université de Liège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Language :
English
Title :
Contributions of U-Th-Pb dating on the diagenesis and sediment sources of the Lower Group (BI) of the Mbuji-Mayi Supergroup (Democratic Republic of Congo)
Publication date :
15 June 2017
Journal title :
Precambrian Research
ISSN :
0301-9268
Publisher :
Elsevier Science, Amsterdam, Netherlands
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
FP7 - 308074 - ELITE - Early Life Traces, Evolution, and Implications for Astrobiology
Funders :
ERC stg ELITE
Belspo PAI PlaNet Topers
CE - Commission Européenne [BE]
Available on ORBi :
since 03 July 2017

Statistics


Number of views
81 (7 by ULiège)
Number of downloads
162 (2 by ULiège)

Scopus citations®
 
11
Scopus citations®
without self-citations
7
OpenCitations
 
9

Bibliography


Similar publications



Contact ORBi