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K-Ar age determinations of some Miocene–Pliocene basalts in Israel: their significance to the tectonics of the Rift Valley

Published online by Cambridge University Press:  01 May 2009

G. Steinitz ,
Y. Bartov  and
J. C. Hunziker
G. Steinitz
Affiliation:
Mapping Division, Geological Survey of Israel, Jerusalem, Israel
Y. Bartov
Affiliation:
Mapping Division, Geological Survey of Israel, Jerusalem, Israel
J. C. Hunziker
Affiliation:
Department of Mineralogy and Petrology, Sahlistr. 6, 3012 Bern
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Summary

Thirty samples of Upper Tertiary basalts intruding marine and continental sequences were by the K-Ar method. Four volcanic phases are recorded: (a) 24.8±1.5 Ma of the Raqabat e Na'ame dike in Central Sinai; (b) 20.4±0.7 Ma of basalt intrusions in Central Sinai and the Arava. Some of these are offset by E-W to NE-SW dextral faults of the Central Sinai – Negev Shear Zone; (c) 14.5±0.3 to 4.9±1.3 Ma of basalt flows in the Eastern Galilee and the Coastal Plain; (d) 2.7±0.6 Ma of ‘En Yahav dike. These results contribute to the correlation between Tertiary continental formations from different areas, and put limits on the age of tectonic events, such as folding in the Syrian arc, faulting in the Central Sinai - Negev Shear Zone and shearing along the Jordan Rift.

Type
Articles
Information
Geological Magazine , Volume 115 , Issue 5 , September 1978 , pp. 329 - 340
Copyright
Copyright © Cambridge University Press 1978

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