Isotopic ages on ophiolites from the eastern Mediterranean

Conférence Chapitre d'actes Isotopic ages on ophiolites from the eastern Mediterranean eng 1980 author Delaloye Michel 24865 author De Souza Hugh Albert Francis 67903 author Wagner Jean-Jacques 25065 author Hedley Ian George 25534 292-295 In the context or Eastern Mediterranean geology, the three ophiolitic massifs of Troodos (Cyprus), Hatay (Turkey) and Baër-Bassit (Syria) can be considered, in many ways, as a coherent ensemble. Lapierre et al. (1972) have shown that the Paphos region of Cyprus and Baër-Bassit are similar, while Parrot (1976) has described the close relationship between Baër-Bassit and the Hatay. Many similarities are also evident in the geochronological data. The gabbros, in particular, have given similar·Cretaceous rediometric ages. On the other hand, dates from the Hatay pillow-lavas lncidate that they have been affected by more recent events than those of Troodos. Good radiometric ages, in aggrement with paleomagnetic and stratigraphic data, are essential to the correct paleogeographic reconstructions of the region concerned. However, the problem in dating ophiolitic rocks is that the majority have been transformed mineralogically and chemically, either on the ocean floor or during emplacement to their present positions. The interpretation of the dates measured, is therefore, difficult. The scatter of dates obtained in our study can be explained by variable radiogenic argon loss or perhaps, by addition of potassium probably from sea-water (halmyrolysis). The presence of excess argon need not be invoked to explain these variations. Ophiolites Chypre Turquie Syrie Dewey 550 Cyprus Geological Survey Department Swiss National Science Foundation 2.207-079 CH 141 Département de minéralogie 152 false Ophiolites: proceedings International Ophiolite Symposium Panayiotou, A. 1-8 April, 1979 Nicosia 0b09107c-1c9d-4740-acad-e0d59f8e693b Proceedings chapter (Published version) Public Delaloye_Ophiolites_1979292.pdf 2400345 application/pdf openAccess Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département de minéralogie

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Isotopic ages on ophiolites from the eastern Mediterranean	Ophiolites: proceedings International Ophiolite Symposium			1980	219	160

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De Souza, Hugh Albert Francis