Zircon and apatite fission-track dating of the James Ross Basin sediments (Antarctic Peninsula)

0082025 - GLÚ 2008 CZ eng A - Abstrakt
Svojtka, Martin - Nývlt, D. - Murakami, M. - Macáková, J. - Filip, Jiří - Mixa, P.
Zircon and apatite fission-track dating of the James Ross Basin sediments (Antarctic Peninsula).
[Zirkonové a apatitové fission-trackové datování sedimentů ostrova James Ross (Antarktický poloostrov).]
Proceedings and excursion guide. Teplá: Czech Geological Survey, 2007. s. 84-84.
[CzechTec 07. Meeting of the Central European Tectonic Studies Group (CETeG) /5./ and Meeting of the Czech Tectonic Studies Group (ČTS) /12./. 11.04.2007-14.04.2007, Teplá]
Grant CEP: GA MŠMT 1K05030
Výzkumný záměr: CEZ:AV0Z30130516
Klíčová slova: zircon * apatite * James Ross Island
Kód oboru RIV: DB - Geologie a mineralogie

All zircons are older than apatite FT ages provided in the identical individual rocks. Provenance of individual FT zircons and apatites ages varies in wide spread of Carboniferous to Early Paleogene ages between ~60 to ~350 Ma. Jurassic-Cretaceous ages of northwest James Ross Island are probably compatible with derivation of sediment from western lying Mt. Reece and Mt. Bradley region, where the rocks of the Antarctic Peninsula batholith appears. Sediments from Seymour Island are probably originating from Trinity Peninsula Group and Antarctic Peninsula Volcanic Group. Shortening of tracks was due to subsequent volcanic/magmatic activity before transport of rocks and deposition into the James Ross Basin or alternatively, due to volcanic reheating after deposition. All zircons are older than apatite FT ages provided in the identical individual rocks. Provenance of individual FT zircons and apatites ages varies in wide spread of Carboniferous to Early Paleogene ages between ~60 to ~350 Ma. Jurassic-Cretaceous ages of northwest James Ross Island are probably compatible with derivation of sediment from western lying Mt. Reece and Mt. Bradley region, where the rocks of the Antarctic Peninsula batholith appears. Sediments from Seymour Island are probably originating from Trinity Peninsula Group and Antarctic Peninsula Volcanic Group. Shortening of tracks was due to subsequent volcanic/magmatic activity before transport of rocks and deposition into the James Ross Basin or alternatively, due to volcanic reheating after deposition. All zircons are older than apatite FT ages provided in the identical individual rocks. Provenance of individual FT zircons and apatites ages varies in wide spread of Carboniferous to Early Paleogene ages between ~60 to ~350 Ma. Jurassic-Cretaceous ages of northwest James Ross Island are probably compatible with derivation of sediment from western lying Mt. Reece and Mt. Bradley region, where the rocks of the Antarctic Peninsula batholith appears. Sediments from Seymour Island are probably originating from Trinity Peninsula Group and Antarctic Peninsula Volcanic Group. Shortening of tracks was due to subsequent volcanic/magmatic activity before transport of rocks and deposition into the James Ross Basin or alternatively, due to volcanic reheating after deposition.
Trvalý link: http://hdl.handle.net/11104/0004034