Timing of rifting in the Alboran Sea basin — correlation of borehole (ODP Leg 161 and Andalucia A-1) to seismic reflection data: implications for basin formation

Tandon, Kush; Lorenzo, Juan M.; Rubio, Joaquin de La Linde

doi:10.1016/s0025-3227(97)00105-9

Cited by 20 publications

(11 citation statements)

References 30 publications

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“…In addition, section could be missing because of minor normal faulting, removal by slumping, removal by erosive bottom currents, or hiatuses caused by periods of nondeposition. Faulting is unlikely because bedding is essentially horizontal across these zones and no normal faults were identified in the cores (Comas et al 1996) or on a seismic section across Site 978 (Tandon et al 1997). No evidence of mass movement (e.g., slump folds or intraclastic breccias) was observed within these two intervals; however, thin (1-2 cm), parallel-laminated foraminiferal and bioclastic sandy to silty layers present throughout Unit I are probably the winnowed products of contour currents.…”

Section: Missing Rhythms (Milankovitch Cycles) In Subunit Ic (Lower Pmentioning

confidence: 99%

Eustatic Signals in Deep-Marine Sedimentary Sequences Recovered at ODP Site 978, Alboran Basin, Western Mediterranean Sea

Marsaglia¹,

Fukusawa²,

Cornell³

et al. 2004

Journal of Sedimentary Research

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A continuous section of Pliocene marine sediments was recovered at Ocean Drilling Program Site 978, located in the Alboran Sea between Spain and Morocco. Three Pliocene subunits have been defined at Site 978: the lowermost (Subunit IC, 129.2 m thick) is characterized by alternating beds of lighter, more calcareous, and darker, less calcareous, claystone with bioturbated upper and lower contacts (Type 1 cycles); the middle (Subunit IB, 67.1 m thick) is composed of relatively homogeneous nannofossil claystone; and the uppermost (Subunit IA, 211.6 m thick) contains abrupt-based darker, terrigenous layers interpreted as turbidites that are interstratified with lighter nannofossil claystone (Type 2 cycles). The rhythmically bedded light and dark layers in Subunit IC correlate with those in the Rosello Composite Section of Sicily, a global reference standard for the Pliocene time scale. These sedimentary cycles are products of variations in precession and resulting continental runoff. Missing cycles occur during eustatic highstands. The shift to more homogeneous sedimentation in Subunit IB is represented in similar-aged sequences throughout the Mediterranean which display evidence of submarine mass wasting. Mediterranean-wide slope degradation was likely a response to rapid sea-level change at approximately 3 Ma. This change in sedimentation style was accompanied by an upsection increase in sediment accumulation rates associated with turbidite influx in Subunit IA. Turbidite frequency throughout the Pliocene section can be linked to eustatic changes in sea level, with turbidite maxima corresponding with mid-sequence downlap surfaces and their associated condensed sections.

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Section: Missing Rhythms (Milankovitch Cycles) In Subunit Ic (Lower Pmentioning

confidence: 99%

Eustatic Signals in Deep-Marine Sedimentary Sequences Recovered at ODP Site 978, Alboran Basin, Western Mediterranean Sea

Marsaglia¹,

Fukusawa²,

Cornell³

et al. 2004

Journal of Sedimentary Research

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“…and stratigraphic data from ODP Site 976 (Shipboard Scientific Party 1996), Unit I ( Fig. 3) was further subdivided into Unit Ia of Quaternary age and Units Ib and Ic of Pliocene age (Tandon et al 1998;Comas etal. 1999).…”

Section: Geological Settingmentioning

confidence: 99%

Pliocene to Recent mud diapirism and related mud volcanoes in the Alboran Sea (Western Mediterranean)

Talukder

Comas

Soto

2003

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High resolution and multichannel seismic profiles depict the Pliocene to Recent evolution of the mud diapirism in the West Alboran Basin (WAB) and its relationship with the Miocene diapir province that occupies the WAB depocentre. During the early to middle Miocene period of basin extension (16 to 9 Ma), normal faulting triggered the diapirism from mobile overpressured shale containing olistostromes. Plio-Quaternary diapirism evolved as a second main stage of diapiric activity and developed throughout the subsequent contractive tectonic evolution of the basin (9 Ma to Holocene). Mud volcanoes, discovered to the south of the WAB, developed on the flank of Recent diapirs as a consequence of the rise of fluidized sediments through diapiric bodies and/or through fractures connecting with deeper diapirs. During the Pliocene to Recent, some diapirs stopped ascending, leading to the production of collapse structures on their tops due to lateral subsurface mud migration and/or fluid escape. Other cylindrical shaped diapirs continued rising and produced mud volcanoes on the sea floor. All the studied volcanoes seem to be currently inactive. Two major pulses of diapiric rise have been distinguished during the Pliocene to Recent contractive evolution of the basin.

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“…Doblas & Oyarzun, 1989; Netherlands Journal of Geosciences -Geologie en Mijnbouw | 87 -4 | 2008 242 1989; Boccaletti et al, 1990;Leblanc, 1990;Frizon de Lamotte et al, 1991;García-Dueñas et al, 1992; Docherty & Banda, 1995;Seber et. al., 1996;Martínez-Martínez & Azañón, 1997;Lonergan & White, 1997; Zeck, 1997, 1999, Tandon et al, 1998 Comas et al, 1999; Calvert et al, 2000;Rosenbaum & Lister, 2004). An origin involving late-orogenic extensional collapse of the inner part of an exotic 'Alboran Block' (accommodated by coeval thin-skinned thrusting in the South Iberian and Maghrebian foreland regions) has been assumed.…”

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confidence: 99%

Punctuated Neogene tectonics and stratigraphy of the African-Iberian plate-boundary zone: concurrent development of Betic-Rif basins (southern Spain, northern Morocco)

Sissingh

2008

Netherlands Journal of Geosciences

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The geological configuration of the present-day Mediterranean is characterized by a complex and extensive system of both interconnected and fragmented fold-and thrust belts that is associated with back-arc basins (e.g. Carminati et al., 1998;Rosenbaum & Lister, 2004). Their tectonic structure and setting are varied, and the compressional origin and growth of the different belts and the formation of the adjoining extensional basins also varies considerably in age. The different fold-andthrusts belts did not evolve during one single, uninterrupted cycle of Alpine orogenesis, but are the ultimate outcome of a prolonged, polyphase process of intermittent plate-tectonic interaction between the African-Arabian and Eurasian plates. This resulted in the creation and ultimate disappearance of two major oceanic basins, the Palaeotethys (mainly Palaeozoic) and the Neotethys (late Palaeozoic-Mesozoic). As in the preceding Jurassic and Cretaceous times, the motions of Africa-Arabia relative to Eurasia during the Tertiary were an important control on the geological evolution of the Alpine Tethys (late Mesozoic-Tertiary). Various kinematic frameworks for palaeotectonic and palaeogeographic reconstructions have been proposed for the region (e.g. Dewey et al., 1989;Rosenbaum et al., 2002). These were mostly based on analysis of rotation parameters (poles of rotation, rotation angles), which allowed to constrain past relative velocities between Africa and Eurasia. In addition, analysis of North Atlantic magnetic lineations helped to constrain the movement of Africa and Europe relative to North America. The consensus view is that during the Late Cretaceous Africa converged towards Europe in a S-N directed rotational mode. This was contemporaneous with spreading of the Azores part of the North Atlantic, the coeval opening of the Gulf of Biscay like a sphenochasm and the resulting anti-clockwise rotation of Iberia with respect to Eurasia. Sinistral motion occurred after an active plate boundary subject to left-lateral strike-slip faulting had been established at the northern margin of the Iberian block. Consequently, Iberia behaved like a promontory AbstractThis paper integrates the sequence stratigraphic and tectonic data related to the Neogene geodynamic and palaeogeographic development of the African-Iberian plate boundary zone between Spain and Morocco. Though the dating of individual tectonostratigraphic sequences and their delimiting sequence boundaries varies in accuracy and precision, their apparent correlation strongly suggests contemporaneous development of the Betic and Rif basins. This may likely be attributed to regional changes of the overall compressional intra-plate stress field. This, in turn, was governed by coeval plate-kinematic changes related to the ongoing collisional convergence of Africa and Iberia. The Neogene succession is characterised by brief tectonic pulses that governed the sequence stratigraphic development of the Betic-Rif basins (NBR phases). It broadly correlates with the coeval sequences in the ...

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Timing of rifting in the Alboran Sea basin — correlation of borehole (ODP Leg 161 and Andalucia A-1) to seismic reflection data: implications for basin formation

Cited by 20 publications

References 30 publications

Eustatic Signals in Deep-Marine Sedimentary Sequences Recovered at ODP Site 978, Alboran Basin, Western Mediterranean Sea

Eustatic Signals in Deep-Marine Sedimentary Sequences Recovered at ODP Site 978, Alboran Basin, Western Mediterranean Sea

Pliocene to Recent mud diapirism and related mud volcanoes in the Alboran Sea (Western Mediterranean)

Punctuated Neogene tectonics and stratigraphy of the African-Iberian plate-boundary zone: concurrent development of Betic-Rif basins (southern Spain, northern Morocco)

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