Evidence for Early-Middle Triassic faulting and possible rifting from the Helez Deep Borehole in the coastal plain of Israel

Druckman, Yehezkeel

doi:10.1144/gsl.sp.1984.017.01.13

Cited by 20 publications

(13 citation statements)

References 4 publications

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“…Evidence for Triassic rifting in the Eastern Mediterranean is strong (Druckman 1984;Garfunkel & Derin 1984). Similar strong evidence for Triassic rifting is found in Morocco (e.g.…”

Section: Syn-rift 2 Megasequence (Rifting Of Mediterranean Passive Masupporting

confidence: 69%

Integrated petroleum systems and play fairway analysis in a complex Palaeozoic basin: Ghadames-Illizi Basin, North Africa

Dixon

Moore

Bourne

et al. 2010

PGC

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The Ghadames-Illizi Basin system is a highly productive petroleum province with a long exploration history in Algeria, Libya and Tunisia (from the late 1950s to present day). Ongoing exploration success in all three countries suggests that it will continue to provide attractive exploration targets in the future. The basin has a long (Cambrian to Plio-Pleistocene) and complex geological evolution characterized by multiple phases of subsidence punctuated by significant regional uplift events. Two 'world-class' petroleum source rocks of different geological age are present (Lower Silurian and Upper Devonian) with similar depositional environments and geochemical characters. Both source horizons have generated significant volumes of oil and gas. Migration is strongly influenced by the stratigraphic architecture of the basin fill, notably distribution of regional seals and the complex patterns of subcrop and onlap across regional unconformities. Multiple reservoir-seal combinations are presented by Late Ordovician glaciogenic sediments and younger Silurian through to Carboniferous paralic sequences. Integrating the stratigraphic relationships with the complex burial history of the basin (timing of uplift, degree of tilting, amount of section removed by erosion) is not a trivial task, but is key to exploration success in such a complex basin. With the aid of 3D basin reconstruction and fluid flow modelling software, we can attempt to capture the stratigraphic and structural complexity and make exploration predictions. If basin modelling techniques are to be optimally applied in such settings, a fully integrated and geologically realistic approach involving sedimentologists, structural geologists, geophysicists and geochemists is required. A modelling approach, workflow and some results are presented.

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“…Evidence for Triassic rifting in the Eastern Mediterranean is strong (Druckman 1984;Garfunkel & Derin 1984). Similar strong evidence for Triassic rifting is found in Morocco (e.g.…”

Section: Syn-rift 2 Megasequence (Rifting Of Mediterranean Passive Masupporting

confidence: 69%

Integrated petroleum systems and play fairway analysis in a complex Palaeozoic basin: Ghadames-Illizi Basin, North Africa

Dixon

Moore

Bourne

et al. 2010

PGC

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“…In this area, seismic and well data show evidence for considerable down-tothe-basin normal faulting in the Triassic and Jurassic section (Druckman 1977(Druckman , 1984Gelberman & Kemmis 1987;Garfunkel 1989Garfunkel , 1998Cohen et al 1990;Druckman et al 1995). An example of such a displacement is recorded on the Heletz Fault (Figs 8a and 9).…”

Section: Neotethyan Rifting Phasementioning

confidence: 99%

Seismic stratigraphy, structure and tectonic evolution of the Levantine Basin, offshore Israel

Gardosh

Druckman

2006

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Multi-channel seismic reflection data and borehole information were used to study the structure and stratigraphy of the Levantine basin, offshore Israel. A new, 2D seismic survey that covers the southeastern Mediterranean Sea from the Israeli coast to the Eratosthenes Seamount shows the entire Phanerozoic sedimentary fill down to a depth of 14-16 km. The basin-fill is subdivided into six seismo-stratigraphic units interpreted as low-order, major depositional cycles (supersequences A-F). Correlation and mapping of these units allowed an investigation of the geological history of the basin and the analysis of two important tectonic phases: Neotethyan rifting, and Syrian Arc inversion and contraction. The Neotethyan rifting phase is recorded by the strata of supersequences A and B. Faulting took place during the Anisian (Mid-Triassic), continued through the Liassic and ceased during the Mid-Jurassic. The basin opened in a NW-SE direction, between the Eratosthenes Seamount and the Levant margin of the Arabian Massif, at an angle of about 30 ~ to the present-day shoreline. No indications for sea-floor spreading were found in the present study. Late Triassic to Liassic volcanic rocks of assumed intraplate origin accumulated in the northeastern part of the basin. It is hypothesized that the basin originated as an intracontinental rift associated with the nucleation of an oceanic spreading centre, but reached only an early magmatic phase. An inversion and contraction phase, associated with closing of the Neotethyan ocean system, is recorded by supersequences C and D. The contractional structures of the Syrian Arc extend in a wide and elevated fold belt along the eastern edge of the deep-marine basin. These structures were formed by the inversion of pre-existing normal faults. The folding occurred in several pulses starting in the Senonian and ending in the Miocene. The western limit of the main fold belt, located 50-70 km west of the coastline, is defined by a transition in crustal properties. Supersequences E and F record the Late Cenozoic history of the basin. A Messinian, evaporitic basin was limited to the east by the elevated and uplifted Syrian Arc fold belt composed of older, Oligocene to Mid-Miocene strata. During highstand episodes, the Messinian evaporites were deposited on the entire slope and within canyons incised into the shelf. High sedimentation rates of Nilotic and locally derived sediments during the Plio-Pleistocene resulted in the development of extensive submarine deltas and basinward progradation of the Levant shelf break.

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“…As the Gevanim Formation of the Negev is Pelsonian in age, interfingering distally with the upper part of the underlying carbonate-rich Raaf Formation, and the Gevanim clastics tend to diminish to the northwest, assignment to this formation is unlikely and in any case contradicted by the younger palynomorphs. The "Ga'ash" shales in fact accumulated during the lengthy gap in sedimentation from Late Anisian to Early Carnian (FA An1 to Ca1; Korngreen and Benjamini, 2007), during the time that the 600 m thick Erez Conglomerate (breccia) accumulated on a downfaulted block at the Heletz Deep 1A borehole (Druckman, 1985;Weinberger, 1992). This gap suggests an important role for block differentiation and sedimentary mass-transport in the Early Carnian.…”

Section: Ga'ash-2 Borehole Data -Lithology and Biostratigraphymentioning

confidence: 99%

“…Significantly, the Heletz Deep 1A deep borehole to the southwest Druckman, 1985;Weinberger, 1992), also part of the shelf edge belt, is marked by a 600 m thick conglomerate (breccia) that contains clasts dated to the time of the Anisian-Early Carnian hiatus of Ga'ash-2 (Cousminer, 1981;Korngreen and Benjamini, 2007).…”

Section: Low-order Cyclementioning

confidence: 99%

Platform to shelf edge transect, Triassic of northern Israel, North Arabian Plate

Korngreen

Benjamini

2011

Sedimentary Geology

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Evidence for Early-Middle Triassic faulting and possible rifting from the Helez Deep Borehole in the coastal plain of Israel

Cited by 20 publications

References 4 publications

Integrated petroleum systems and play fairway analysis in a complex Palaeozoic basin: Ghadames-Illizi Basin, North Africa

Integrated petroleum systems and play fairway analysis in a complex Palaeozoic basin: Ghadames-Illizi Basin, North Africa

Seismic stratigraphy, structure and tectonic evolution of the Levantine Basin, offshore Israel

Platform to shelf edge transect, Triassic of northern Israel, North Arabian Plate

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