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Cycladic Blueschist Unit

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... repetition of characteristic marker successions, suggest that the whole-rock pile of the Cycladic Blueschist Unit on Syros, including meta-ophiolites and metasediments, retains numerous primary depositional features. Magmatic activity in an Upper Cretaceous backarc environment was likely...
Series: GSA Special Papers
Published: 01 July 2011
DOI: 10.1130/SPE481
Journal Article
Published: 01 December 2008
Journal of the Geological Society (2008) 165 (6): 1019–1030.
...UWE RING; CHRISTINE KUMERICS Abstract The contribution of vertical ductile thinning to the exhumation of high-pressure rocks is evaluated by estimating finite strain in 75 exhumed high-pressure rocks of the Cycladic blueschist unit in the Aegean Sea, Greece, and western Turkey. Strain data indicate...
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Journal Article
Published: 01 May 2007
Journal of the Geological Society (2007) 164 (3): 637–652.
...Uwe Ring; Johannes Glodny; Thomas Will; Stuart Thomson Abstract We show that the Styra Nappe of the Cycladic Blueschist Unit on Evia constitutes a wedge of high-pressure rocks extruded during early stages of orogeny. The nappe pile on Evia was assembled during D 2 top-to-the-SSW-directed thrusting...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.FLD023.02
EISBN: 9780813756233
...: The Hellenides and Anatolides in the Eastern Mediterranean.” We start the outcrop descriptions with Day 1 in Samos, where, untypically for the N-S–stretched Aegean region, Miocene extension is E–W. We describe a section in western Samos, where the Cycladic Blueschist Unit is in contact with the underlying...
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Journal Article
Published: 28 April 2021
Journal of the Geological Society (2021) jgs2020-217.
... in the passive margin sequence of the Cycladic Blueschist Unit on Naxos Island, Greece, separates amphibolite facies, non-high-pressure rocks (Koronos Unit) below the shear zone from Eocene high-pressure rocks (Zas Unit) above the shear zone. We review existing pressure–temperature data from the Koronos Unit...
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Journal Article
Journal: Geology
Published: 01 May 2001
Geology (2001) 29 (5): 395–398.
...Uwe Ring; Paul W. Layer; Thomas Reischmann Abstract The Cyclades in the backarc region of the present Hellenic subduction zone are known for widespread Late Cretaceous to Eocene high-pressure metamorphism in the Cycladic blueschist unit. We report 40 Ar/ 39 Ar and Rb/Sr phengite ages of 24–21 Ma...
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Journal Article
Published: 01 September 2001
Journal of the Geological Society (2001) 158 (5): 769–784.
... that the Anatolide belt in western Turkey formed under greenschist facies metamorphic conditions in the Eocene when a high-pressure metamorphic fragment of the Adriatic plate (the Cycladic blueschist unit) was thrust onto the imbricated mid-crustal units of the Anatolian microcontinent (the Menderes nappes...
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Journal Article
Journal: GSA Bulletin
Published: 31 August 2017
GSA Bulletin (2018) 130 (1-2): 238–262.
... of basement rocks have not yet been adequately investigated. We present new structural, petrological, and geochronological data that suggest that the basement rocks on Milos (Kiriaki complex) belong to the Cycladic Blueschist Unit, which underwent blueschist metamorphism at ∼8.5 kbar and 400 °C. The complex...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 February 2012
Lithosphere (2012) 4 (1): 23–39.
...-angle normal fault system trending over a length of more than 200 km forms the North Cycladic detachment system, which records a NE-directed normal shear sense separating the Cycladic Blueschist unit in the footwall from the Upper Cycladic unit in the hanging wall. Based on new structural field data, we...
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Journal Article
Published: 01 January 2002
Journal of the Geological Society (2002) 159 (1): 45–60.
...MARIO SÁNCHEZ-GÓMEZ; DOV AVIGAD; ARIEL HEIMANN Abstract In the Cyclades, low-angle normal faults juxtaposed Miocene sedimentary rock units lying over Alpine blueschist- and greenschist-facies metamorphic rocks and Miocene granites. The sedimentary units in the hanging wall were deposited in fault...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP291.2
EISBN: 9781862395398
... ). The Cyclades Blueschist Unit (CBU, the Lower Unit): 1, Eocene high-pressure rocks overprinted at greenschist-facies conditions in the Early Miocene; 2, Eocene eclogite-facies rocks. The Upper Unit: 3, low-pressure metamorphic rocks, mostly of Late Cretaceous age; 4, ophiolites; 5, Early Miocene clastic...
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Journal Article
Journal: Geology
Published: 22 March 2018
Geology (2018) 46 (5): 475–478.
...Whitney M. Behr; Alissa J. Kotowski; Kyle T. Ashley Abstract We present observations from an exhumed subduction complex that resembles the environment of modern deep episodic tremor and slow slip (ETS). We focus on the Cycladic Blueschist Unit on Syros Island in Greece. Syros metabasites consist...
FIGURES
Journal Article
Published: 01 May 2003
Geological Magazine (2003) 140 (3): 245–252.
... at rates of 5–15 °C Myr −1 since Late Cretaceous times. Samples from the Cycladic blueschist unit in the footwall of the detachment on Tinos Island have a mean zircon fission-track age of 10.0 ± 1.0 Ma, which together with a published mean apatite fission-track age of 9.4 ± 0.5 Ma indicates rapid cooling...
FIGURES
Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.FLD023.11
EISBN: 9780813756233
... Selçuk Nappe and the non-metamorphosed Cycladic Ophiolite Nappe. This field guide is concerned with the two structurally lowest units, the Basal Unit and the overlying Cycladic Blueschist Unit, as well as the Tertiary sediments. Samos is not one of the typical Aegean “turtle-back–shaped core-complex...
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Journal Article
Published: 01 February 2011
The Canadian Mineralogist (2011) 49 (1): 105–116.
.... The faults show top-to-the-southwest sense of shear and cross-cut mylonitic gneisses of the Cycladic Blueschist Unit on Despotiko Island, located southwest of Antiparos, in the Cyclades, Greece. The black tourmaline crystals, up to 180 μm in length and 50 μm in diameter, form slickenside fibers...
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Journal Article
Published: 01 August 2017
American Mineralogist (2017) 102 (8): 1622–1631.
...Michalis Fitros; Stylianos F. Tombros; Anthony E. Williams-Jones; Basilios Tsikouras; Eleni Koutsopoulou; Konstantin Hatzipanagiotou Abstract The 11.6 to 9.5 Ma Serifos pluton intruded schists and marbles of the Cycladic Blueschist unit, causing thermal metamorphism, the development of magnetite Ca...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/9780813700236
EISBN: 9780813756233
Journal Article
Published: 01 January 2008
Journal of the Geological Society (2008) 165 (1): 263–277.
... of the Cycladic blueschist unit. The opening of the Aegean Sea basin in the Miocene was controlled by a few large-magnitude low-angle normal faults. 16 5 2007 25 9 2006 © 2008 The Geological Society of London 2008 The Aegean has undergone continental extension since at least the Oligocene...
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Journal Article
Published: 03 February 2011
Geological Magazine (2011) 148 (4): 511–528.
..., 1998 , 2006 ), as well as Late Cretaceous granitoids and medium-pressure/high-temperature metamorphic rocks (e.g. Patzak, Okrusch & Kreuzer, 1994 and references therein). The lower unit (hereafter referred to as the Cycladic blueschist unit) comprises a pre-Alpine crystalline basement...