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Provenance of Proterozoic garnet-biotite gneiss recovered from Elan Bank, Kerguelen Plateau, southern Indian Ocean
journal contribution
posted on 2023-05-17, 08:42 authored by Nicolaysen, K, Bowring, S, Frey, F, Weis, D, Ingle, S, Pringle, MS, Mike CoffinMike CoffinAt Elan Bank of the Kerguelen Plateau in the southeast Indian Ocean, Leg 183 of the Ocean Drilling Program recovered clasts of garnet-biotite gneiss in a fluvial conglomerate intercalated with basalt flows. U-Pb and Pb-Pb dates of zircons and monazites in these clasts and an overlying sandstone range from 534 to 2547 Ma, which is much older than the surrounding Indian Ocean seafloor. These dates show that old continental crust resides in the shallow crust of the oceanic Kerguelen Plateau and that the breakup of Gondwana dispersed continental fragments into the nascent Indian Ocean lithosphere.
History
Publication title
Geology (Boulder)Volume
29Pagination
235-238ISSN
0091-7613Department/School
Institute for Marine and Antarctic StudiesPublisher
Geological Soc AmericaPlace of publication
Inc, Po Box 9140, Boulder, USA, Co, 80301-9140Rights statement
Copyright © 2001 Geological Society of AmericaRepository Status
- Restricted