A CONTRIBUTION TO THE GEOLOGICAL STRUCTURE OF CHIOS ISLAND, EASTERN AEGEAN SEA

PDF
Published: Jan 1, 2010
DOI: https://doi.org/10.12681/bgsg.11189
Keywords:
Chios Island Autochthonous Unit Parautochthonous Unit
V. Tselepidis
Institute of Geology and Mineral Exploration, Department of Geology and Geological Mapping
Th. Rondoyanni
National Technical University of Athens, School of Mining and Metallurgical Engineering, Department of Geological Science
Abstract
Τhe island of Chios, in the eastern Aegean Sea, is of great geological interest due to the outcrops of the oldest Paleozoic rocks of the Hellenides. Three main geological units of Paleozoic and Mesozoic age dominate, that have a tectonic relationship: the Autochthonous unit is overthrusted by the Parautochthonous unit, which in turn is overthrusted by the Allochthonous unit. In this work, new geological and tectonic data concerning the Autochthonous unit and especially its part of the Paleozoic - Mesozoic transition are presented and evaluated. Due to the rare outcrops of this transition and the lack of sufficient palaeontological data, there are various and contradictory opinions concerning its normal or discordant character. Based on our field data and lithostratigraphic correlations, we can draw the following main results: Considering the Autochthonous unit, the transition of the Paleozoic formations to the Mesozoic ones is characterized by an angular unconformity as well as by a basal conglomerate. In some places there is a tectonic contact between them, this of a thrust fault. The Lower Triassic formations of the Parautochthonous unit belong to the Autochthonous unit, since they present similar palaeogeographic conditions. Moreover, the presence of the “Hallstatt” limestones in the Autochthonous unit can be explained by their local deposition in lenticular form.
Article Details
  • Section
  • General and Structural Geology
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Authors who publish with this journal agree to the following terms:

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution Non-Commercial License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g. post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (preferably in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.

Downloads
Download data is not yet available.
References
Besenecker, H., Durr, S., Herget, G., Jacobshagen, V., Kauffman, G., Ludtke, G., Roth, W. and Tietze,
K.V., 1968. Geologie von Chios (Agais). Geol. Palaeontol., 2, 121–150.
Besenecker, H., Durr, S., Herget, G., Kauffman, G., Ludtke, G., Roth, W. and Tietze, K., 1971. Geological
map of Greece. Chios, 1:50 000. IGME ed., Athens.
Herget, G., 1978. Die Geology von Nord-chios (Agais).Unpublished Ph.D. Thesis, Univ. of Marbrug.
Gaetani, M., Jacobschagen, V., Nicora, A., Kauffmann, G., Tselepides, V., Fantini-Sentini, N., Mertmann,
D and Skourtis-Coroneou, V., 1992. The Early-Middle Triassic Boundary st Chios (Greece). Riv. Ital.
XLIII, No 1 – 385
Paleontol. Stratigraf., 98, 181-204.
Grooves, J., Larghi, C., Nicora, A., Rettori, R., 2003. Mississipian (Lower Carboniferous) microfossils
from the Chios Melange (Chios island, Greece). Geobios, 36, 379-389.
Kauffmann, G., 1969. Die Geology von Nord-chios (Agais).Unpublished Ph.D. Thesis, Univ. of Marbrug.
Ktenas, K., 1921. Sur la decouverte du devonien a l’ile de Chio (Mer Egee). C.R.somm. Soc. Geol.
France, 170-172.
Papanikolaou, D., Sideris, C.H., 1983. Le Palaeozoique de l’autochtone de Chios: une formation a blocks
de type wildflysch d’ age Permien. C.R.A.Sc., 297, 603-606.
Robertson, A., Pickett, E., 2000. Palaeozoic-early Tertiary evolution of melanges, rift and passive margin
units in the Karaburun peninsula (western Turley) and Chios island (Greece). In tectonics and
Magmatism in Turkey and the Surrounding area. Geological Society of London, Special publication,
, 43-82.
Roth, G., 1968. Die Geology von Nord-chios (Agais).Unpublished Ph.D. Thesis, Univ. of Marbrug.
Tselepidis, V., 2007. Palaeontological and stratigraphic study of the Epidavros ammonites. Contribution
to the knowledge of the “Hallstatt” facies in the Hellenides. Ph.D. Theseis, University of Thessaloniki
(in Greek)
Zachi, A., Garzanti, E., Larghi, C., Angiolini, L. and Gaetani, M., 2003. The Variscan orogeny in Chios
(Greece): Carboniferous accretion along a Palaeotethyan active margin. Terra Nova, 15/3, 213-223.
Most read articles by the same author(s)