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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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| Schreurs, Guido; Buiter, Susanne J. H.; Boutelier, Jennifer; Burberry, Caroline; Callot, Jean-paul; Cavozzi, Cristian; Cerca, Mariano; Chen, Jian-hong; Cristallini, Ernesto; Cruden, Alexander R.; Cruz, Leonardo; Daniel, Jean-marc; Da Poian, Gabriela; Garcia, Victor H.; Gomes, Caroline J. S.; Grall, Celine; Guillot, Yannick; Guzman, Cecilia; Hidayah, Triyani Nur; Hilley, George; Klinkmuller, Matthias; Koyi, Hemin A.; Lu, Chia-yu; Maillot, Bertrand; Meriaux, Catherine; Nilfouroushan, Faramarz; Pan, Chang-chih; Pillot, Daniel; Portillo, Rodrigo; Rosenau, Matthias; Schellart, Wouter P.; Schlische, Roy W.; Take, Andy; Vendeville, Bruno; Vergnaud, Marine; Vettori, Matteo; Wang, Shih-hsien; Withjack, Martha O.; Yagupsky, Daniel; Yamada, Yasuhiro. |
| We performed a quantitative comparison of brittle thrust wedge experiments to evaluate the variability among analogue models and to appraise the reproducibility and limits of model interpretation. Fifteen analogue modeling laboratories participated in this benchmark initiative. Each laboratory received a shipment of the same type of quartz and corundum sand and all laboratories adhered to a stringent model building protocol and used the same type of foil to cover base and sidewalls of the sandbox. Sieve structure, sifting height, filling rate, and details on off-scraping of excess sand followed prescribed procedures. Our analogue benchmark shows that even for simple plane-strain experiments with prescribed stringent model construction techniques,... |
| Tipo: Text |
Palavras-chave: Thrust wedges; Brittle wedges; Shear zones; Analogue modeling; Benchmarking; Critical taper; Sand; Friction; Cohesion. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00359/47011/51118.pdf |
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| Hananto, Nugroho; Boudarine, Asmoune; Carton, Helene; Singh, Satish C.; Avianto, Praditya; Dyment, Jerome; Qin, Yanfang; Ghosal, Dibakar; Zuraida, Rina; Tapponnier, Paul E.; Deplus, Christine; Sieh, Kerry. |
| The Wharton Basin in the Indian Ocean is one of the most extensively deforming ocean basins, as confirmed by the occurrence of several very large earthquakes starting from January 12, 2012 with Mw 7.2 followed by the great earthquakes of April 11, 2012 with Mw 8.6 and Mw 8.2. Although the Mw 7.2 and Mw 8.2 earthquakes seem to have ruptured the re-activated N–S striking fracture zones, the largest event (Mw 8.6) required the rupturing of several faults, oblique to each other, in a very complex manner. In order to understand the nature of deformation in these earthquakes rupture zones, we recently acquired 90 000 km2 of bathymetry, 11 400 km of sub-bottom profiling, gravity and magnetic data covering the rupture areas of the 2012 earthquakes east of the... |
| Tipo: Text |
Palavras-chave: The 2012 Indian Ocean earthquake; Diffuse deformation; Wharton Basin; Plate bending; Shear zones; Normal faults. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00456/56738/58526.pdf |
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