Eo-Alpine Metamorphism in the Uppermost Unit of the Cretan Nappe System — Petrology and Geochronology

Seidel, Eberhard; Okrusch, Martin; Kreuzer, H. J.; Raschka, Helmut; Harre, Wilhelm

doi:10.1007/bf03542937

Cited by 48 publications

(25 citation statements)

References 24 publications

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“…The presence of hornblende-rich amphibolites is reported in the central Messara, near Aghioi Deka and Lendas (Seidel et al 1976). In the Asterousia Mountains, the existence of various members of the ophiolitic complex is also reported, notably with dolerites, serpentinites, peridotites, amphibolites and radiolarian cherts; residual peridotites are thrusted on this formation.…”

Section: Resultsmentioning

confidence: 92%

“…In the Asterousia Mountains, the existence of various members of the ophiolitic complex is also reported, notably with dolerites, serpentinites, peridotites, amphibolites and radiolarian cherts; residual peridotites are thrusted on this formation. 2 Igneous intrusions of various compositions and textures have also been identified in the Asteroussia Mountains (see Seidel et al 1981). Most notably, some oceanic plagiogranites are found as parts of composite dykes, and they are closely associated with gabbrodioritic lithologies (Langosch et al 2000, 343).…”

Section: Resultsmentioning

confidence: 99%

“…Their main alteration product is serpentinite, which is found in association with Vatos schists and gneisses between Tylissos and Sisarcha. Geologists also acknowledge the occurrence of gabbrodiorite dykes in the serpentinite outcrop at Anogeia (e.g., Seidel et al 1981), but we could not observe those during fieldwork.…”

Section: Geological Observationsmentioning

confidence: 91%

“…According to the definition proposed during the 1972 Penrose Conference, an ophiolite sequence consists, from bottom to top, of upper mantle peridotites (serpentinized peridotites, peridotites), layered ultramafic-mafic rocks, layered to isotropic gabbros, sheeted dykes (dolerites), extrusive rocks (basalts, pillow lavas) and a sedimentary cover (Anonymous 1972). The base is comprised of a chaotic mélange formation of rocks of various origins and different ages (Seidel et al 1981). Most of these were formed under relatively high metamorphic conditions of high pressure and high temperature (amphibolites, paraamphibolites, andalusites, paragneisses and micaschists with sillimanite-cordierite-garnet); the mélange also includes calc-silicate rocks and marbles, as well as non-metamorphized sediments; some volcanics can occur locally (Creutzburg and Seidel 1975;Langosch et al 2000).…”

Section: Primary Outcrops and Alpine Deformationsmentioning

confidence: 99%

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Ophiolites Associated with Pottery Production in Bronze Age Crete

et al. 2017

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This study investigates diversity among ophiolite‐bearing sediments that were exploited for pottery production in Bronze Age Crete (c.3000–1200 bc). The focus is on loose and consolidated formations of Upper Tertiary to Quaternary ages that contain some detrital products of Mesozoic ophiolitic source rocks. A literature review, geological fieldwork, sediment sampling and petrographic analysis are combined to identify the origin, the geographical distribution and the stratigraphic position of these ophiolitic sediments, and to assess regional diversity in their mineralogy and texture. The results provide insights into current archaeological problems regarding the provenance and production of ophiolite‐bearing pottery in Bronze Age Crete.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Geological Observationsmentioning

confidence: 91%

Section: Primary Outcrops and Alpine Deformationsmentioning

confidence: 99%

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Ophiolites Associated with Pottery Production in Bronze Age Crete

et al. 2017

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“…The lower nappes are in ascending order the Plattenkalk unit and the PQ (the latter includes the Tripali unit of Krahl et al, 1983), both of which were affected by early Miocene HP metamorphism (Jolivet et al, 1996;Seidel, 1977;Seidel et al, 1982). The upper nappes are in ascending order the Tripolitza unit, Pindos unit, and a complex uppermost unit (Seidel et al, 1976; Figure 4), all of which do not have a Miocene HP overprint (Seidel et al, 1976.…”

Section: Geology Of Cretementioning

confidence: 99%

“To Be, or Not to Be, That Is the Question”—The Cretan Extensional Detachment, Greece

Ring

Yngwe

2018

Tectonics

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We present new structural data from the contact zone between the high‐pressure Phyllite‐Quartzite unit (PQ) and the overlying non‐high‐pressure Tripolitza unit in east‐central Crete for testing propositions that this contact represents the top‐to‐the‐north Cretan extensional detachment. Detailed mapping in the Neapoli valley shows that the PQ/Tripolitza contact is associated with a shallowly dipping penetrative foliation and associated south‐southwest (SSW)‐trending stretching lineation in the PQ. Kinematic indicators yielded a consistent top‐to‐the‐SSW sense of shear. The Tripolitza unit above was brittlely deformed, and top‐to‐the‐SSW thrust faults sole out in the contact zone. Undoing the effects of subsequent large‐wavelength, low‐amplitude folding about west‐northwest‐trending axes of the contact indicates that the top‐to‐the‐SSW kinematics resulted from crustal shortening. Therefore, the PQ/Tripolitza contact in the Neapoli valley is an out‐of‐sequence thrust, the Tripolitza thrust. We discuss a tectonic model in which the high‐pressure PQ was first exhumed in a shortening‐related extrusion wedge between about 22 and 17 Ma. The top of the exhuming extrusion wedge was then cut off by out‐of‐sequence thrusts in the upper crust at ≥17–11 Ma during sustained N‐S shortening. Subsequently, extensional graben in Crete formed after 11 Ma.

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Description of the Tectonic Units

Papanikolaou¹

2021

The Geology of Greece

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Eo-Alpine Metamorphism in the Uppermost Unit of the Cretan Nappe System — Petrology and Geochronology

Cited by 48 publications

References 24 publications

Ophiolites Associated with Pottery Production in Bronze Age Crete

Ophiolites Associated with Pottery Production in Bronze Age Crete

“To Be, or Not to Be, That Is the Question”—The Cretan Extensional Detachment, Greece

Description of the Tectonic Units

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