FN Archimer Export Format
PT J
TI Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection
BT 
AF LAMARQUE, Gaelle
   BASCOU, Jerome
   MENOT, Rene-Pierre
   PAQUETTE, Jean-Louis
   COUZINIE, Simon
   ROLLAND, Yann
   COTTIN, Jean-Yves
AS 1:1,2;2:1;3:1;4:3;5:4;6:5;7:1;
FF 1:PDG-REM-GM-LGS;2:;3:;4:;5:;6:;7:;
C1 Univ Lyon, UJM St Etienne, UMR CNRS IRD 6524, Lab Magmas & Volcans, F-42023 St Etienne, France.
   Ifremer, Geosci Marines, Ctr Brest, F-29280 Plouzane, France.
   UMR CNRS IRD 6524, Lab Magmas & Volcans, F-63038 Clermont Ferrand, France.
   Univ Lyon, ENSL, UCBL, CNRS,LGL TPE, F-69007 Lyon, France.
   Univ Nice Sophia Antipolis, Geoazur, UMR CNRS 7329, 250 Rue Albert Einstein, F-06560 Valbonne, France.
C2 UNIV LYON, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
   UNIV LYON, FRANCE
   UNIV NICE, FRANCE
SI BREST
SE PDG-REM-GM-LGS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 3.913
TC 7
UR https://archimer.ifremer.fr/doc/00457/56903/58865.pdf
LA English
DT Article
DE ;Gondwana margin;Ross orogeny;George V Land;Antarctica-Australia connection;Zircon and monazite U-Pb dating
AB This study presents the first geochronological results on basement rocks from the Penguin-Bage-Webb (PBW) domain located east of the Neoarchean-Paleoproterozoic Terre Adélie craton, Antarctica. Investigated samples are paragneiss xenoliths hosted within early Paleozoic granitoids, which were emplaced during the Ross orogeny. Zircon UPb dating yielded ages ranging from the Archean to the Cambrian, with a dominant Ediacaran (550–635 Ma) population and maximum depositional ages around 570–575 Ma. U–Th–Pb analyses of monazite suggest that the metamorphic event that formed the gneiss samples occured at ca. 515 Ma, shortly prior to incorporation within the granitic magmas. The studied samples likely represent relics of the pre-Gondawana Pacific margin, which was subsequently deformed and metamorphosed during the early Paleozoic Ross orogeny. The obtained zircon UPb date distributions present similarities with those of the Kanmantoo and Nargoon sediments in Southern Australia and provide new constrains for the correlations between East Antarctica and South Australia before the opening of the Southern Ocean. 
PY 2018
PD OCT
SO Lithos
SN 0024-4937
PU Elsevier Science Bv
VL 318-319
UT 000449141300015
BP 219
EP 229
DI 10.1016/j.lithos.2018.08.021
ID 56903
ER

EF