 | | Journal (article/letter/editorial) | | Bochum, D-44780 D-44780 Bochum, Bochum, Germany Germany Abstract Ion microprobe (SHRIMP) data on zircons...zircons from various rock types of an ultrahigh-pressure (UHP) metamorphic whiteschist-type pyrope quartzite...within about 5-6 Ma indicating an average uplift rate of about 20-24 km/Ma and an average cooling rate of about...radiometric data obtained do not lend any support to an Eo-Alpine Cretaceous subduction event so that deep...Chopin (1984) considered a sedimentary origin in an evaporitic environment just as for the whiteschists |  | Zhimulev, F.I., Buslov, M.M., Travin, A.V., Dmitrieva, N.V., De Grave, J. (2011) Early–Middle Ordovician nappe tectonics of the junction between the Kokchetav HP-UHP metamorphic belt and the Stepnyak paleoisland arc (northern Kazakhstan) Russian Geology and Geophysics, 52 (1) 109-123 doi:10.1016/j.rgg.2010.12.009 | Journal (article/letter/editorial) | | geochronological data, the Kokchetav microcontinent existed as an isolated continental block within the Paleoasian...Sharyk Formation (Goncharenko, 1974). The Group’s upper part corresponds to the Kokchetav Formation of ...the Stepnyak zone. The latter has been viewed as an Early Ordovician island arc system (Peive and Mossakovskii...collisional events. The Upper Arenigian–Caradocian island arc volcanics and flysch overlie Upper Cambrian–Lower...responsible for the juxtaposition of subcrustal and upper crustal rocks. The structure, age, and formation |  | Manzotti, Paola, Bosse, Valérie, Pitra, Pavel, Robyr, Martin, Schiavi, Federica, Ballèvre, Michel (2018) Exhumation rates in the Gran Paradiso Massif (Western Alps) constrained by in situ U–Th–Pb dating of accessory phases (monazite, allanite and xenotime) Contributions to Mineralogy and Petrology, 173 (3) doi:10.1007/s00410-018-1452-7 | Journal (article/letter/editorial) | | Accepted: 28 February 2018 © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Exhumation...conditions and the crystallization of xenotime leading to an exhumation rate of the order of 2.2–5 mm/year. The...(Compagnoni et al. 1974; Le Bayon and Ballèvre 2006). The upper one (Gran Paradiso Unit) is essentially made of...Paradiso Massif Meffan-Main et al. (2004) proposed an age of 43.0 ± 0.4 Ma for the HP stage in the Gran...Unit. This age is based on a Rb–Sr microsample of an apatite–phengite pair in a Mg-rich micaschist (the |  | | Journal (article/letter/editorial) | | different lithologies (Eastern Alps): age results, and an evaluation of potential problems for garnet Sm–Nd...temperature. These issues are addressed by way of an evaluation of garnet Sm – Nd data from different...Austroalpine basement onto the subducted units of the Pennine realm. 3.2. Sm – Nd garnet ages Figs. 2 and 3 show...the Plankogel unit, Saualpe (Table 1, Fig. 1), in an isochron diagram. Details are given in Appendices...crystallization during Permian metamorphism. sion, an identical, but much better defined age of 262 F 4 |  | | Journal (article/letter/editorial) | | different lithologies (Eastern Alps): age results, and an evaluation of potential problems for garnet Sm–Nd...temperature. These issues are addressed by way of an evaluation of garnet Sm – Nd data from different...Austroalpine basement onto the subducted units of the Pennine realm. 3.2. Sm – Nd garnet ages Figs. 2 and 3 show...the Plankogel unit, Saualpe (Table 1, Fig. 1), in an isochron diagram. Details are given in Appendices...crystallization during Permian metamorphism. sion, an identical, but much better defined age of 262 F 4 |  | | Journal (article/letter/editorial) | | recycling a b s t r a c t Chemical geodynamics is an integrated discipline that studies the geochemical...was primarily focused on mantle geochemistry, with an emphasis on geochemical recycling in oceanic subduction...Consequently, chemical geodynamics has developed as an integrated architecture dealing with the geochemical...2008a). Thus, this category of UHP terranes provides an excellent natural laboratory for studying the transition...metamorphic rocks in continental subduction zones, with an emphasis on geochemical transfer and geodynamic evolution |
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