Extensional tectonics in Mt Parnon (Peloponnesus,Greece) |
| |
| Authors: | Emmanuel Skourtsos Spyridon Lekkas |
| |
| Institution: | (1) Department of Dynamic, Tectonic and Applied Geology, Faculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15784 Panepistimioupolis Zografou, Athens, Greece |
| |
| Abstract: | Peloponnesus in the south-western part of the Aegean is formed by a heterogeneous pile of alpine thrust sheets that was reworked
by normal faulting from Upper Miocene to recent times. Upper Miocene–Lower Pliocene extension in Mt Parnon was accommodated
by several mappable brittle detachment faults that exhibit a top-to-the-NE-ENE sense of shear. The hanging wall of the detachments
comprises a number of highly tilted fault blocks containing abundant evidence of intense internal deformation by normal faulting
and layer-parallel shearing contemporaneous with faulting. These fault blocks are remnants of a cohesive extensional block
that slipped to the NE-ENE and broke up along high-angle normal faults that sole into or are cut by the detachments. The largest
part of this block is located at the eastern edge of the metamorphic core forming the hanging wall of East Parnon high-angle
normal fault that excised part of the aforementioned detachments. The lowermost metamorphic Unit of the nappe-pile does not
seem to be affected by the previous extensional episode. Upper plate reconstruction shows that various units of the nappe-pile
were affected by high-angle normal faults that linked to detachment faults in the weaker layers. Since the Middle-Upper Pliocene
further exhumation of the metamorphic rocks has resulted in the formation of high-angle normal faults overprinting Neogene
extensional structures and cut the entire nappe-pile. This new fault system tilted the earlier extensional structures and
produced a NE-SW coaxial deformation of Mt Parnon. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
