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Geological investigations in northern Israel, supported by recent seismic interpretation of offshore data, indicate that the major fault systems there have undergone several tectonic phases since the Mesozoic. It is suggested that the vertical displacements related to the younger phase of Neogene to Recent age are in a reverse direction to those of the Mesozoic and older phases. 相似文献
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Several morphotectonic features trending NW-SE have been reported along the continental slope of Israel, and the Palmahim structure served as a model for their present tectonic interpretation. It is suggested that the Palmahim structure is a large strike-slip fault, extending from the continental shelf to the marine Levantine Platform along some 80 km, and is associated with various secondary faulted and folded structures. The fault has been active apparently since at least the Upper Miocene, but the intensity of the tectonic activity seems to have decreased since the Pleistocene. There are grounds to assume that the NW-SE-trending faults in the continental slope correlate to the tectonic activities in the Coastal Plain and in the Dead Sea Rift Valley. 相似文献
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Y. Folkman 《Tectonophysics》1981,80(1-4):135-146
The results of a combined analysis of aeromagnetic and gravity data covering the rift and adjacent areas show two different deep structural models: (a) Across the northern and central portions of the rift zone the crustal thickness and the character of the upper mantle remain unchanged. On the other hand, the lithology of the upper crust varies laterally so that the mafic composition of the rock type probably increases from east to west. (b) The southern portion of the rift may be underlain by an anomalous, low-density upper mantle.
Local negative gravity anomalies within the rift zone delineate deep depressions, separated by structural highs. The Dead Sea depression is interpreted to be filled by 7.5 km of young, low-density sediments.
Local magnetic anomalies which cover the northern portion only are interpreted as basalt flows. This approach enables delineation of fault patterns which support the classic view of sinistral strike slip movement along a complicated fault system. 相似文献
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East-west-trending magnetic and gravity anomalies across central Israel have been interpreted as being related to lateral lithological changes in crustal rocks, from a low-magnetization and relatively lower-density rock type in the south, into a higher-magnetization, higher-density rock type in the north. The zone of the interpreted lithological discontinuity is associated with significant variations in stratigraphic thickness, which suggest that the magnetic and gravity anomalies mark a fossil edge of the Arabian-African continent in contact with the Tethyan crust. Seismic reflection profiles indicate that the minimum age of the formation of the Tethyan crust is probably pre-Late Jurassic. 相似文献
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