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

Steinitz, G.; Bartov, Y.; Hunziker, Johannes C.

doi:10.1017/s0016756800037341

Cited by 119 publications

(34 citation statements)

References 9 publications

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“…The DSR is one of the most conspicuous geologic features in the Middle East, with a total left lateral slip of 105 km accumulated since Middle Miocene (ca. 17-20 Ma) (Quennell, 1959;Freund et al, 1970;Bartov, 1974;Steinitz et al, 1978;Garfunkel, 1981;Bandel and Khouri, 1981;Joffe and Garfunkel, 1987). According to these values, the average motion along the transform boundary is about 5-6 mm/yr.…”

Section: Introductionmentioning

confidence: 99%

Development of recent faulting in the southern Dead Sea Rift according to GPR imaging

Basson¹,

Ben‐Avraham²,

Garfunkel³

et al. 2002

Stephan Mueller Spec. Publ. Ser.

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Abstract. The Arava valley is located at the southern part of the Dead Sea Rift (DSR). The continuous long-term tectonic activity in the area of Evrona fault zone, southern Arava valley, is evident with abundant geological expressions, while the neotectonic activity is not very clear on the surface. Furthermore, surficial inspection may give the impression that this prominent transform plate-boundary hardly produces meaningful evidence for recent tectonic activity.However, Ground Penetrating Radar (GPR) imaging, which has been conducted across the Evrona fault zone up to a depth of approximately 25 meters below the surface, reveals a dense inhomogeneous distribution of subsurface discontinuities. These hundreds of discontinuities per a kilometer length of GPR profile can be interpreted as sets of fractures and faults, with a variety of dip-slips, spatial orientations and depths. Another unique GPR observation reveals that the density of faults increases as a function of depth at the first 25 m. Moreover, the apparent dips of the faults suggest that they merge at a depth of a few tens of meters. This is confirmed by Shallow Seismic Reflection (SSR) observations conducted at the same locations, which generally identify a parent fault below group of faults that are detected by the GPR. According to both seismic and radar observations, a typical single active fault which is traced through the top hundred meters, changes its characteristics abruptly as it reaches a depth range of about 35-20 m below the surface. It then proceeds towards the surface in a series of splays. As a result of this mechanism, the tectonic displacement that accumulates along a plane of a parent fault is dispersed towards the surface. Linear Shear Strength Decrease (LSSD), damage distribution and fault propagation modelling of the relations between the structure and distribution of the faults and the mechanical properties of the alluvial materials of Evrona emphasize the splay mechanism and other phenomena revealed by the GPR images.Correspondence to: U. Basson (uri@geo-sense.com) An analysis of the faults detected by GPR in Evrona helped in evaluating the relative level of tectonic activity of an active fault zone. According to this approach, the neotectonic history of the Evrona fault zone during the last 45 000 yr is recorded. The GPR record reveals a peak in tectonic activity within 18 000-27 000 ybp. This peak in tectonic activity is about 37% higher than the average tectonic activity of the whole period. The level of tectonic activity in the recent period recorded by GPR (0-9000 ybp) is about 70% of the average tectonic activity and about 50% of the peak activity. These values and the decreasing trend in the tectonic activity since the peak wave suggest that the most recent period is tectonically quiet.

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Section: Introductionmentioning

confidence: 99%

Development of recent faulting in the southern Dead Sea Rift according to GPR imaging

Basson¹,

Ben‐Avraham²,

Garfunkel³

et al. 2002

Stephan Mueller Spec. Publ. Ser.

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“…The Tih Plateau is traversed by a very long E-Woriented fault zone (the Themed fault), which extends for about 200 km from the vicinity of the eastern margin of the Suez rift to the Dead Sea transform (Said 1990). This east-west trending of dextral strike-slip faults with up to 2.5 km of displacement has been recognized in central Sinai by Steinitz et al (1978).…”

Section: Central Sinai Fault (Themed Fault) Zonementioning

confidence: 67%

زلزالية شبه جزيرة سيناء - مصر

2008

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“…Alkaline olivine basalts were reported by Steinitz et al (1978) from the western part of the Sinai peninsula. This volcanism is generally considered "minor" (Steckler 1985;Patton et al 1994).…”

Section: Suez Riftmentioning

confidence: 99%

Continental strike-slip rifts and their stratigraphic signature: application to the Bangong/Nujiang zone (Tibet) and the South Penninic zone (Alps)

Mattern

Schneider

Wang

et al. 1998

Geologische Rundschau

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Our literature studies show that the thermal regime along continental strike-slip rifts is inconspicuous and that they are "low-volcanicity rifts" at best. Along with that, young continental strike-slip rifts exhibit no signs of major thermally controlled doming. We suggest that the larger the strike-slip component of a rift is, the less likely major thermal doming is causally associated with the rift zone. Since vertical lithosphere movements are reflected in the stratigraphic record of a rifted area, different rift modes (strike-slip, dip-slip) may be distinguished by analyzing the relevant sequences. Two ancient and especially suitable strike-slip rift margins in Tethyan mountain belts, the Bangong/Nujiang zone of Tibet and the South Penninic zone of the Alps, were analyzed with regard to their uplift history. The results confirm recent regional rift models which indicate in both cases that rifting was dominated by strike-slip. The stratigraphic approach may provide significant clues as to the mode of paleorifting when structural data are unavailable.

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

Cited by 119 publications

References 9 publications

Development of recent faulting in the southern Dead Sea Rift according to GPR imaging

Development of recent faulting in the southern Dead Sea Rift according to GPR imaging

زلزالية شبه جزيرة سيناء - مصر

Continental strike-slip rifts and their stratigraphic signature: application to the Bangong/Nujiang zone (Tibet) and the South Penninic zone (Alps)

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