1. Tectono-sedimentary evolution of lower to middle Miocene half-graben basins related to an extensional detachment fault (western Crete, Greece).
- Author
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Seidel, Markus, Seidel, Eberhard, and Stöckhert, Bernhard
- Subjects
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ISLANDS , *MIOCENE stratigraphic geology , *STRUCTURAL geology , *PHYSICAL geology , *GEOLOGY , *GRABENS (Geology) , *GEOLOGIC faults , *FAULT zones - Abstract
Crustal extension in the overriding plate at the Aegean subduction zone, related to the rollback of the subducting African slab in the Miocene, resulted in a detachment fault separating high-pressure/low-temperature (HP-LT) metamorphic lower from non-metamorphic upper tectonic units on Crete. In western Crete, detachment faulting at deeper crustal levels was accompanied by structural disintegration of the hangingwall leading to the formation of half-graben-type sedimentary basins filled by alluvial fan and fan-delta deposits. The coarse-grained clastic sediments in these half-grabens are exclusively derived from the non-metamorphic units atop the detachment fault. Being in direct tectonic contact with HP-LT metamorphic rocks of the lower tectonic units today, the basins must have formed in the period between c. 20 and 15 Ma, prior to the exposure of the HP-LT metamorphic rocks at the surface, and juxtaposed with the latter during ongoing deformation. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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