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| Naumenko-dèzes, M.o.; Rolland, Y.; Lamarque, Gaelle; Duclaux, G.; Gallet, S.; Bascou, J.; Ménot, R.p.. |
| The Terre Adélie Craton displays superimposed strain fields related to the Neoarchean (2.6–2.4 Ga, M1) and Paleo-Mesoproterozoic (1.7–1.5 Ga, M2) metamorphic events. M1 is a regional granulite facies event, constrained by P-T modelling at ~0.8–1.0 GPa – 800–850 °C, followed by a decompressional retrogression in the upper amphibolite facies at ~0.6 GPa – 750 °C. M2 Stage 1 P-T peak is constrained at 0.6–0.7 GPa – 670–700 °C, followed by a steep P-T path down to 0.3 GPa – 550 °C. Retrogression after M2 PT peak occurred in a context of dextral shearing along the Mertz Shear Zone along with thrust motions within the eastern Terre Adélie Craton. In this paper, we present a series of 63 new 40Ar/39Ar ages of biotite and amphibole pairs in mafic rocks from a... |
| Tipo: Text |
Palavras-chave: East Antarctica; Ar-40/Ar-39 dating; Shear zones; HT metamorphism; P-T modelling; Mafic magmatism. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00599/71145/69465.pdf |
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