Helium isotopes in Dead Sea Transform waters

Torfstein, Adi; Hammerschmidt, Konrad; Friedrichsen, Hans; Starinsky, Abraham; Garfunkel, Zvi; Kolodny, Yehoshua

doi:10.1016/j.chemgeo.2013.06.008

Cited by 16 publications

(11 citation statements)

References 77 publications

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“…41 and references therein). He with Rc/Ra from 1.2 to 2.2 is within the range observed by other authors 42,43 and interpreted as mantle-derived 3 He along tectonic structures. This includes samples from the north western shore of the SoG, along the onshore continuation of the CT (Stations 12, 13 and 14).…”

Section: Geochemistry Fluids Carried To the Surface Through Migratiosupporting

confidence: 89%

“…Fig. 8 ; 43 ). This relatively high input of mantle-He, is accompanied by a high radiogenic 4 He contribution of crustal origin, in a region with a thick sedimentary package of up to 8 km, and a Moho at ~ 25 km 47 .…”

Section: Resultsmentioning

confidence: 96%

“…a Torfstein et al 42 . b Inguaggiato et al 43 . www.nature.com/scientificreports/ www.nature.com/scientificreports/ tive for gathering information on morphological expressions of faults.…”

Section: Methodsmentioning

confidence: 99%

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Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Gasperini

Lazar

Mazzini

et al. 2020

Sci Rep

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The Sea of Galilee in northeast Israel is a freshwater lake filling a morphological depression along the Dead Sea fault. it is located in a tectonically complex area, where a n-S main fault system intersects secondary fault patterns non-univocally interpreted by previous reconstructions. A set of multiscale geophysical, geochemical and seismological data, reprocessed or newly collected, was analysed to unravel the interplay between shallow tectonic deformations and geodynamic processes. the result is a neotectonic map highlighting major seismogenic faults in a key region at the boundary between the Africa/Sinai and Arabian plates. Most active seismogenic displacement occurs along nnW-SSe oriented transtensional faults. this results in a left-lateral bifurcation of the Dead Sea fault forming a rhomb-shaped depression we named the Capharnaum Trough, located off-track relative to the alleged principal deformation zone. Low-magnitude (M L = 3-4) epicentres accurately located during a recent seismic sequence are aligned along this feature, whose activity, depth and regional importance is supported by geophysical and geochemical evidence. this case study, involving a multiscale/ multidisciplinary approach, may serve as a reference for similar geodynamic settings in the world, where unravelling geometric and kinematic complexities is challenging but fundamental for reliable earthquake hazard assessments. Strike-slip deformation zones are complex tectonic domains generally showing high lateral variability. This is due mainly to strain partitioning, which can develop transtensive and transpressive deformations in response to local crustal heterogeneities or to changes in the regional stress field. Fault bends and oversteps create zones of diffuse deformation, which could mask the tracks of main active fault segments. On the other hand, diachronicity in fault activation-deactivation often creates complex patterns recording multiphase tectonic processes. Another uncertainty is whether or not deformations observed at the surface are expression of deep-seated tectonic structures. Where lakes or inland seas develop, particularly in tectonically subsiding areas, waterborne seismic reflection surveys can be a powerful tool to overcome these problems, because the relatively homogeneous and continuous sedimentary sequence which fills the depression may enhance imaging of tectonic structures, facilitating kinematic reconstructions. In the subaqueous environment, the good coupling between seismic source, substratum and receivers, together with a relative simplicity in field operations, permits acquisition of densely spaced grids of high-resolution subsurface images. Where deformation rates are high relative to sediment supply, exposed tectonic lineaments may be detected by combining seismic reflection profiles and high-resolution morpho-bathymetric maps. However, in order to produce reliable maps of active faults, these data should be coupled with other information, such as local seismicity, major historical earthquakes, geodetic ve...

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Section: Geochemistry Fluids Carried To the Surface Through Migratiosupporting

confidence: 89%

Section: Resultsmentioning

confidence: 96%

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Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Gasperini

Lazar

Mazzini

et al. 2020

Sci Rep

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“…This value of 6.8 R A appears to be slightly elevated compared to a proposed SCLM end-member value of 6.3 R A that was observed in a single sample from Jizan (Hopp et al, 2004). Similar or slightly lower values (down to 5.6 R A ) were also measured in olivine phenocrysts from lava flows to the far north in the Golan (Torfstein et al, 2013), but the most helium-rich samples from that region have [He] > 100 nccSTP/g and also show a narrow range of 6.5-6.8 R A . In places where the SCLM beneath the Arabian Plate has remained largely unmodified by metasomatic effects, it seems to be only slightly heterogeneous in 3 He/ 4 He, showing a narrower range than the typically accepted values for SCLM globally (~6±2 R A : Day et al, 2005;Dunai and Porcelli, 2002).…”

Section: Distinguishing Proterozoic and Cenozoic Signatures Beneath Harrat Hutaymahsupporting

confidence: 69%

“…Data from Hopp et al, (2003) are total crushed values from pyroxenes and whole rock separates. Data from Torfstein et al, (2013) for the Dead Sea Rift are for olivine and pyroxene separated from Golan basalts. Rahat data are for olivine phenocrysts from Murcia et al (2013).…”

Section: Discussionmentioning

confidence: 99%

Asthenosphere–lithosphere interactions in Western Saudi Arabia: Inferences from 3He/4He in xenoliths and lava flows from Harrat Hutaymah

Konrad

Graham

Thornber

et al. 2016

Lithos

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is young (< 850 ka) and the northeasternmost of the volcanic fields. There is a remarkable homogeneity of 3 He/ 4 He trapped within most xenoliths, with a weighted mean of 7.54 ± 0.03 R A (2σ, n = 20). This homogeneity occurs over at least eight different xenolith types (including spinel lherzolite, amphibole clinopyroxenite, olivine websterite, clinopyroxenite and garnet websterite), and encompasses ten different volcanic centers within an area of ~2500 km 2 . The homogeneity is Elevated 3 He/ 4 He in the western harrats has been observed only at Rahat (up to 11.8 R A ; Murcia et al., 2013), a volcanic field situated above thinned lithosphere beneath the Makkah-Medinah-Nafud volcanic lineament. Previous work established that spinel lherzolites at Hutaymah are sourced near the lithosphere-asthenosphere boundary (LAB), while other xenolith types there are derived from shallower depths within the lithosphere itself (Thornber, 1992).Helium isotopes are consistent with melts originating near the LAB beneath many of the Arabian harrats, and any magma derived from the Afar mantle plume currently appears to be of minor importance.

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Noble gases reveal the complex groundwater mixing pattern and origin of salinization in the Azraq Oasis, Jordan

Kaudse

Bani-Khalaf

Tuffaha

et al. 2016

Applied Geochemistry

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Helium isotopes in Dead Sea Transform waters

Cited by 16 publications

References 77 publications

Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system

Asthenosphere–lithosphere interactions in Western Saudi Arabia: Inferences from 3He/4He in xenoliths and lava flows from Harrat Hutaymah

Noble gases reveal the complex groundwater mixing pattern and origin of salinization in the Azraq Oasis, Jordan

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