Sinistral strike-slip motion on the Dead Sea Rift: Confirmation from new magnetic data

Hatcher, Robert D.; Zietz, Isidore; Regan, Robert D.; Abu-Ajamieh, Muhammad

doi:10.1130/0091-7613(1981)9<458:ssmotd>2.0.co;2

Cited by 61 publications

(19 citation statements)

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“…The MB occurs in the direction of N-S, E-W, NW-SE, and NE-SW, which coincide within the main regional and local structural fault directions (Figure 1). The N-S trending fractures are parallel to the Dead Sea transform fault, whereas the E-W fractures lie parallel to Zarqa-Ma'in fault, Suwaqa fault, Hasa fault, and Salwan fault perpendicular to the Dead Sea Transform Fault and Suwaqa normal fault [21]. The NE-SW trending joints are consistent with the late Pan-African stress pattern and are parallel to Amman Hallabat fault [22] [23].…”

Section: Geological Settingmentioning

confidence: 61%

Contribution to the Petrography, Geochemistry, and Petrogenesis of Zarqa-Ma’in Pleistocene Alkali Olivine Basalt Flow of Central Jordan

Yaseen¹

2014

IJG

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The Zarqa-Ma'in basalt (MB) occurs near a plateau basalt (wadi fills) covering about 15 km 2 of Makawir, Ataruz, and Hammat um Hasana cone areas in central Jordan. The tectonic evolution occurred through intraplate volcanism and erupted through fissure systems along the Dead Sea, transforming the fault during Miocene to Pleistocene period. Three stages of eruption of MB have been recorded during Pleistocene from 6 to 0.6 Ma. The petrographic analyses data show that the MB rocks are composed of plagioclase, olivine, pyroxene, and magnetite, including secondary minerals calcite, iddingsite, serpentine, and zeolite. Furthermore, the MB rocks have narrow ranges of major and trace element concentrations, and are of under saturated silica type and belong to sodic alkaline magma series. The geochemical characteristics of MB indicate that MB was derived from a slightly fractionated magma as reflected by its high MgO (6.3 -11.7 ppm) concentration with Mg number from 0.41 to 0.61, low silica content (40.83 -47.55 wt%), and high Cr and Ni concentrations (115 -475 and 105 -553 ppm, respectively). This basalt exhibited low degree of partial melting (10%) for garnet peridotite mantle source. The model mineral fractionation showed that the MB could be fractionated to clinopyroxene, orthopyroxene, olivine, and plagioclase.

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Section: Geological Settingmentioning

confidence: 61%

Contribution to the Petrography, Geochemistry, and Petrogenesis of Zarqa-Ma’in Pleistocene Alkali Olivine Basalt Flow of Central Jordan

Yaseen¹

2014

IJG

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“…Matching of numerous markers across the transform indicates a left-lateral offset of approximately 105 km (Quennell 1959, Bartov 1974. These markers include all known features of the Cambrian to Cretaceous sedimentary cover in the area from southern Lebanon and southward as well as some feature of the basement (Freund et al 1970, Druckman 1974, Bandel 1981, Bandel & Khouri 1981, Segev 1984 and magnetic anomalies (Hatcher et al 1981). Along the northern part of the transform, from Lebanon and northward, offset makers were not documented.…”

Section: Introductionmentioning

confidence: 97%

Geology and Evolution of the Southern Dead Sea Fault with Emphasis on Subsurface Structure

Ben‐Avraham

Garfunkel

Lazar³

2008

Annu. Rev. Earth Planet. Sci.

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The Dead Sea Fault is an active transform fault linking opening in the Red Sea with collision in the Taurus/Zagros Mountains. Motion is left-lateral and estimated at approximately 5-7 mm year −1 . The fault is seismically active, and can be divided into two distinct structural segments. This study focuses on the southern segment based mainly on the wealth of geophysical data. Owing to transtention caused by oblique-slip and the overlapping of en-echelon fault strands, a series of pull-apart basins were formed along the fault's length. These basins are long and deep-reaching in places more than 10 km deep. They are characterized by extensional, compressional, and asymmetrical structures varying in size from large-scale (defining the general structure of the Dead Sea fault valley) to small-scale (defining the internal structure). This study examines the internal structure of these basins from south to north and summarizes the state of knowledge to date.

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“…It probably reflects contrasts in magnetic properties of the buried crystalline basement dating to the Precambrian [ Segev et al , 1999]. These negative and positive anomalies extend eastward across the transform valley 111 km to the north, providing clear evidence for the total motion along the Dead Sea Transform [ Hatcher et al , 1981; Rybakov et al , 1997] (Figure 3b).…”

Section: Discussionmentioning

confidence: 98%

“…The long wavelength anomalies of the magnetic intensity field often correspond to deeper crustal sources. These anomalies are emphasized in the TMI data which were continued upward to an elevation of 3000′ (900 m) above sea level and placed between a regional magnetic survey that was previously flown at that elevation in Israel [ Domzalski , 1967] and a regional magnetic survey that was previously flown at elevations of 1500–2000 m above sea level in Jordan [ Hatcher et al , 1981; Al‐Zoubi and Ben‐Avraham , 2002] (Figure 3). (The eastern highlands are significantly higher in elevation than both the transform valley and the western highlands; hence terrain clearance there is only several hundred meters).…”

Section: Discussionmentioning

confidence: 99%

Magnetic character of a large continental transform: An aeromagnetic survey of the Dead Sea Fault

Brink

Rybakov

Al-Zoubi

et al. 2007

Geochem Geophys Geosyst

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[1] New high-resolution airborne magnetic (HRAM) data along a 120-km-long section of the Dead Sea Transform in southern Jordan and Israel shed light on the shallow structure of the fault zone and on the kinematics of the plate boundary. Despite infrequent seismic activity and only intermittent surface exposure, the fault is delineated clearly on a map of the first vertical derivative of the magnetic intensity, indicating that the source of the magnetic anomaly is shallow. The fault is manifested by a 10-20 nT negative anomaly in areas where the fault cuts through magnetic basement and by a <5 nT positive anomaly in other areas. Modeling suggests that the shallow fault is several hundred meters wide, in agreement with other geophysical and geological observations. A magnetic expression is observed only along the active trace of the fault and may reflect alteration of magnetic minerals due to fault zone processes or groundwater flow. The general lack of surface expression of the fault may reflect the absence of surface rupture during earthquakes. The magnetic data also indicate that unlike the San Andreas Fault, the location of this part of the plate boundary was stable throughout its history. Magnetic anomalies also support a total left-lateral offset of 105-110 km along the plate boundary, as suggested by others. Finally, despite previous suggestions of transtensional motion along the Dead Sea Transform, we did not identify any igneous intrusions related to the activity of this fault segment.

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Sinistral strike-slip motion on the Dead Sea Rift: Confirmation from new magnetic data

Cited by 61 publications

References 0 publications

Contribution to the Petrography, Geochemistry, and Petrogenesis of Zarqa-Ma’in Pleistocene Alkali Olivine Basalt Flow of Central Jordan

Contribution to the Petrography, Geochemistry, and Petrogenesis of Zarqa-Ma’in Pleistocene Alkali Olivine Basalt Flow of Central Jordan

Geology and Evolution of the Southern Dead Sea Fault with Emphasis on Subsurface Structure

Magnetic character of a large continental transform: An aeromagnetic survey of the Dead Sea Fault

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