The thermal structure of Israel and the Dead Sea Fault

Shalev, Eyal; Lyakhovsky, Vladimir; Weinstein, Yishai; Ben‐Avraham, Zvi

doi:10.1016/j.tecto.2012.09.011

Cited by 43 publications

(46 citation statements)

References 43 publications

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“…On the other hand, these data may be explained by discrete heating events in the past. Such events at an active rift margin are not unlikely: anomalously high water temperatures have been reported from the Shamir artesian drillhole, just 2 km northwest of the Nahal Orvim site (Siebert et al, 2014), as well as 40 km south of the Nahal Orvim site (Gvirtzman et al, 1997;Roded et al, 2013;Shalev et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Violet stimulated luminescence: geo- or thermochronometer?

Ankjærgaard

Guralnik²,

Porat

et al. 2015

Radiation Measurements

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Highlights We investigate the potential of VSL to date quartz from early Quaternary palaeosols (1.6 -0.7 Ma old).  The VSL signals show good reproducibility, dose response, thermal stability, and dose recovery.  VSL ages from three palaeosols underestimate the independent K-Ar ages by 50% or more.  It is possible that the VSL ages are correct, but have been reset by thermal anomalies.  Further investigation of the natural VSL signal is needed to confirm these underestimating ages. AbstractThe method of quartz optically stimulated luminescence (OSL) dating is widely used, but generally limited to the past ~0.1 million years (Ma) due to early saturation of the desired signal. Violet stimulated luminescence (VSL) of quartz has previously been shown as a promising alternative, with a dose saturation level ~20 times higher compared to that of OSL, excellent thermal stability on the 10 11 year time scale, and agreement between VSL and OSL ages up to ~0.3 Ma. Here we explore the usability of the VSL signal to date older quartz samples from palaeosols, whose ages are bracketed by K-Ar ages and palaeomagnetic data of the interbedded basalts, emplaced between 1.6 and 0.7 Ma. VSL ages from three palaeosols largely underestimate the independent ages of their overlying basalts. This can be explained either by a low-temperature thermal anomaly resetting the VSL signal in nature, and/or by an insufficient measurement protocol, unable to correctly translate the natural signal into the equivalent laboratory dose.2

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Section: Discussionmentioning

confidence: 99%

Violet stimulated luminescence: geo- or thermochronometer?

Ankjærgaard

Guralnik²,

Porat

et al. 2015

Radiation Measurements

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“…Eckstein and Simmons, 1997; 218 Shalev et al, 2013), the area of the Lake Tiberias is overall affected by heat flow 219 higher than 60 mWm -2 , locally reaching 85 mWm -2 (Shalev et al, 2008). Particularly, 220…”

Section: Margins 198mentioning

confidence: 99%

Transient simulations of large-scale hydrogeological processes causing temperature and salinity anomalies in the Tiberias Basin

Magri

Inbar

Siebert

et al. 2015

Journal of Hydrology

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out that by including salinity effects, the flow patterns differ from those of a purely 18 thermal regime because heavy brines dampen upward buoyant flow and convective 19 cells. Accordingly, the fault permeability had to be increased to restore a good fit 20 with the measured temperatures. This further supports the hypothesis that the high 21 temperature gradient in the LYG is likely due to fractures or faults in that area. The 22 thermohaline simulations also suggest that the derivatives of relic seawater brines 23 2 are the major source of salinity. Deep brines leaching salt diapirs cannot reach the 24 surface. However, the presence of local shallower salt bodies below the lake can 25 potentially contribute to the salinity of the western spring and well waters, though 26 in very small amount. This is in agreement with geochemical data according to which 27 the major source of the brines of the Tiberias basin represents seawater 28 evaporation brines. Besides being of importance for understanding the 29 hydrogeological processes that salinize Lake Tiberias, the presented simulations 30 provide a real-case example illustrating large-scale fluid patterns due to only one 31 source of buoyancy (heat) and those that are additionally coupled to salinity. 32

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“…Sadeh et al (2012) used GPS velocities between 1996 and 2008 to infer slip rate and locking depth along the various segments of the DST. Shalev et al (2013) analysed temperature data from oil and water wells across Israel. They present a cross section of calculated temperature gradients along the DST.…”

Section: Seismogenic Depthmentioning

confidence: 99%

The effect of alternative seismotectonic models on PSHA results – a sensitivity study for two sites in Israel

Avital

Kamai

Davis

et al. 2018

Nat. Hazards Earth Syst. Sci.

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Abstract. We present a full probabilistic seismic hazard analysis (PSHA) sensitivity analysis for two sites in southern Israel -one in the near field of a major fault system and one farther away. The PSHA analysis is conducted for alternative source representations, using alternative model parameters for the main seismic sources, such as slip rate and M max , among others. The analysis also considers the effect of the ground motion prediction equation (GMPE) on the hazard results. In this way, the two types of epistemic uncertainty -modelling uncertainty and parametric uncertaintyare treated and addressed. We quantify the uncertainty propagation by testing its influence on the final calculated hazard, such that the controlling knowledge gaps are identified and can be treated in future studies. We find that current practice in Israel, as represented by the current version of the building code, grossly underestimates the hazard, by approximately 40 % in short return periods (e.g. 10 % in 50 years) and by as much as 150 % in long return periods (e.g. 10E −5 ). The analysis shows that this underestimation is most probably due to a combination of factors, including source definitions as well as the GMPE used for analysis.

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The thermal structure of Israel and the Dead Sea Fault

Cited by 43 publications

References 43 publications

Violet stimulated luminescence: geo- or thermochronometer?

Violet stimulated luminescence: geo- or thermochronometer?

Transient simulations of large-scale hydrogeological processes causing temperature and salinity anomalies in the Tiberias Basin

The effect of alternative seismotectonic models on PSHA results – a sensitivity study for two sites in Israel

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