The Oligo-Miocene deepwater system of the Levant Basin

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- 57 -The Oligocene to Early Miocene succession was interpreted and mapped in the seismic records as asingle seismic unit encompassing a few high order depositional cycles of Oligocene and lowerMiocene age (Fig. 3).A considerable shedding of clastic material into the Levant Basin occurred during the early part theOligocene, resulting in the exposure of Nubian sandstone terrain in proximal areas (Fig. 33).Oligocene continental deposits are absent in Israel. Apparently, clastic material was either notstored inland, or was deposited and later eroded following the uplift of central Israel during theMiocene and Pliocene.Approximately 250 m of Oligocene coarse-grained clastics (sandstones and conglomerates, named"Ashdod Clastics" ) were penetrated in the Ashdod wells, located in the southern Coastal Plain,where the Ashdod Canyon meets the present-day shoreline (Fig. 25) (Buchbinder and Siman-Tov,2000; Buchbinder et al., 2005). The age of the Ashdod Clastics is not strictly defined. It may rangefrom upper Rupelian to lower Chattian (zones P19 to P21 in Figure 8; Buchbinder et al., 2005).Core #2 from the Ashdod-2 borehole reveals a conglomerate consisting of boulders, imbricatedpebbles (mostly of Cretaceous limestones and dolostones) and bioclastic sandstones of turbiditeorigin. Two intervals of highly porous sandstones, 20 m to 50 m thick, were detected in the AshdodClastics section. Their SP (Spontaneous Potential) and GR (Gamma-Ray) logs response exhibitblocky to fining-upward patterns. Other parts of the section show a serrated log motif, reflectinginterbedded conglomerates, sandstones and marls (Buchbinder et al., 2005). The Oligocene clasticsuccession is interpreted as a proximal slope fan, deposited within the upper part of the submarineAshdod Canyon (Fig. 33).Further offshore, at the intra-slope part of the Ashdod Canyon, the Hanaha-1 borehole encounteredseveral sand-rich beds at the upper part of the Oligocene canyon fill (Fig. 34). The section includesabout 30 m of net sands with average porosity of 20-27%. These may be interpreted as channel fillsands that were derived from the slope fan at the upper part of the canyon.In the Afiq Canyon, Martinotti (1981) reported a Cretaceous boulder within hemi-pelagic MiddleOligocene sediments in the Gaza-1 borehole. Apparently, sands either bypassed the present-dayonshore part of the Afiq Canyon and were deposited offshore, or were eroded during the repeatedcanyon entrenchments in the Miocene.
- 58 -SlopeSusita + En-GevsandsShelfContinentalMiddle Oligocene shorelineLower HazevasandsEarly Oligocene shorelineExposed NubiansandstoneFigure 33: The paleogeography of the Levant margin during the Oligocene - EarlyMiocene time. Continental drainage system (marked by black arrows) carriedsiliciclastic sediments from the east to the Levant shelf, from where it was furthertransported into the basin through submarine canyons (marked by red dashed lines).The source of siliciclastics was redeposited Nubian sandstone found in outcrops atsouthern and northern Israel. Occurrences of shelf and deep-water sands in wells aremarked by yellow polygones.
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The Oligo-Miocene deepwater system
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ITable of contentPageAbstract …
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IIIFigure 16: Depth map of the base
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- 2 -Oligo-Miocene sands were depos
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- 4 -The discoveries of the early 2
Page 13 and 14: - 6 -the southeastern part of the b
Page 15 and 16: - 8 -Legend2D survey A2D survey B2D
Page 17 and 18: - 10 -2.2 Seismic dataThe seismic i
Page 19 and 20: - 12 -conditions, and possibly sedi
Page 21 and 22: - 14 -3.3.2 Lower Oligocene sedimen
Page 23 and 24: - 16 -Druckman, 2006; Bertoni and C
Page 25 and 26: - 18 -aSWNETWT (ms)bSWHanaha-1NEMav
Page 27 and 28: - 20 -aNWSETWT (ms)bYam West-1Ziqim
Page 29 and 30: - 22 -WETWT (ms)aYam Yafo-1multiple
Page 31 and 32: - 24 -NW SEaYam West-2Plio-Pleistoc
Page 33 and 34: - 26 -A third incision surface, mar
Page 35 and 36: - 28 -4.2.2 Deep, central part of t
Page 37 and 38: - 30 -10812591167Figure 13: Time st
Page 39 and 40: - 32 -10812591167Figure 15: Time st
Page 41 and 42: - 34 -HaifaQishon302829AtlitCaesare
Page 43 and 44: - 36 -Figure 19: Depth map on the t
Page 45 and 46: - 38 -SW NEAfiq Canyon Ashdod Canyo
Page 47 and 48: - 40 -The Beer Sheva-Afiq Canyon lo
Page 49 and 50: - 42 -SWNE SW NE SW NEPlio-Pleistoc
Page 51 and 52: - 44 -SWHanaha-1NE SW NE SW Hof Ash
Page 53 and 54: - 46 -BMSL1400m.1500200025003000Han
Page 55 and 56: - 48 -WE W E NW SEPlio-PleistoceneC
Page 57 and 58: - 50 -W EPlio-PleistoceneMessinian
Page 59 and 60: - 52 -S NPlio-PleistoceneM.-U. Mioc
Page 61 and 62: Figure 31: Stratigraphic section al
Page 63: - 56 -W ELower-slope and basin floo
Page 67 and 68: - 60 -In the Hadera Canyon the seis
Page 69 and 70: - 62 -Additional mechanisms for tra
Page 71 and 72: - 64 -The existence of channel fill
Page 73 and 74: - 66 -SlopePartly Uplifted ?Hordos
Page 75 and 76: - 68 -Oligo-Miocene sands were depo
Page 77 and 78: - 70 -Druckman, Y., Conway, B.H., E
Page 79 and 80: - 72 -Neev, D., 1960, A pre-Neogene
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The Oligo-Miocene deepwater system of the Levant Basin

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