Magnetostratigraphic dating of an Upper Miocene shallow-marine and continental sedimentary succession in northeastern Morocco

Cunningham, Kevin J.; Farr, Mark R.; Bied, Kruna Rakic-El

doi:10.1016/0012-821x(94)90199-6

Cited by 35 publications

(25 citation statements)

References 26 publications

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“…In the Melilla-Nador platform and basin recent high precision 40 Ar/ 39 Ar geochronological studies, following some older 40 Ar/ 39 Ar ages and GPTS calibration (Cunningham et al 1994(Cunningham et al , 1997, led to the following (Roger et al 2000;CornØe et al 2002). -The oldest age is 6.87 Ma in the upper part of T1, and the underlying deposits have not been accurately dated, as either early Messinian and/or Tortonian.…”

Section: Chronological Frameworkmentioning

confidence: 95%

“…Magnetostratigraphic studies were devoted to the MelillaNador carbonate platform in NE Morocco (Cunningham et al 1994) and Cabo de Gata in SE Spain (Franseen et al 1998;Montgomery et al 2001). Volcanic deposits interbedded with the littoral to the basinal sediments of the Melilla-Nador basin were dated using Ar 39 /Ar 40 radiometric dating (Cunningham et al 1997;Roger et al 2000;Münch et al 2001;CornØe et al 2002).…”

Section: Introductionmentioning

confidence: 99%

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Correlations and sequence stratigraphic model for Messinian carbonate platforms of the western and central Mediterranean

Cornée¹,

Martin²,

Conesa³

et al. 2004

Int J Earth Sci (Geol Rundsch)

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Distance correlations of Late Tortonian-Messinian littoral carbonate complexes are proposed from the study of eight platforms in the western and central Mediterranean. Correlations are based on the identification of two major biological sedimentary cycles and of two index surfaces. Surface A is a maximum flooding surface during cycle 1 at around 6.7 Ma. Surface B is a regional marine planation surface at around 5.95 Ma, at the base of cycle 2 (Terminal Carbonate Complex). A general sedimentary model is proposed for the 7-5.6-Ma time-span. The boundary between cycles 1 and 2 is coincident with the onset of the Messinian Salinity Crisis, and appears to be related to major environmental-paleooceanographic changes in the Mediterranean, rather than to a major sea-level drop or to climatic change.

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Section: Chronological Frameworkmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Correlations and sequence stratigraphic model for Messinian carbonate platforms of the western and central Mediterranean

Cornée¹,

Martin²,

Conesa³

et al. 2004

Int J Earth Sci (Geol Rundsch)

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“…A different model is proposed by Dronkert (1985), Martõ Ân and Braga (1994) and Riding et al (1998), assuming a hiatus in the Sorbas basin at the Abad/Yesares transition (to be discussed in Section 5.2) and a correlation of the Yesares evaporites to a post-MSC re¯ooding of the Mediterranean. The latter scenario requires a correlation of the Yesares Member to the`Upper Evaporites'/Lago Mare units and the Zorreras Member to the Pliocene (Dronkert, 1985;Cunningham et al, 1994;Riding et al, 1998). In contrast, the Zorreras Member is correlated to the latest Messinian, based on the observation of caspibrackish ostracod fauna with a strontium signal equivalent to the Lago Mare ostracods (latest Messinian) of the other Mediterranean basins (Mu Èller and Hsu È, 1987;Gautier et al, 1994;Roep et al, 1998).…”

Section: Stratigraphic Framework and Previous Modelsmentioning

confidence: 99%

Astrochronology for the Messinian Sorbas basin (SE Spain) and orbital (precessional) forcing for evaporite cyclicity

Krijgsman

Fortuin

Hilgen

et al. 2001

Sedimentary Geology

187

162

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The Sorbas basin of SE Spain contains one of the most complete sedimentary successions of the Mediterranean re¯ecting the increasing salinity during the Messinian salinity crisis. A detailed cyclostratigraphic study of these successions allows a correlation of the sedimentary cycle patterns to astronomical target curves. Here, we present an astrochronological framework for the Messinian of the central part of the Sorbas basin. This framework will form a solid basis for high-resolution correlations to the marginal carbonate facies and to the Central Mediterranean area.The early Messinian Abad Member contains 55 precession induced sedimentary cycles marked by homogeneous marl±opal-rich bed alternations in the`Lower Abad' and by homogeneous marl±sapropel alternations in the`Upper Abad'. Astronomical tuning results in an age of 5.96 Ma for the transition to the Yesares evaporites and thus for the onset of the`Messinian salinity crisis'. The marl±sapropel cycles of the`Upper Abad' are replaced by gypsum±sapropel cycles (14) in the Yesares Member, indicating that the evaporite cyclicity is related to precession controlled oscillations in (circum) Mediterranean climate as well. As a consequence, gypsum beds correspond to precession maxima (insolation minima) and relatively dry climate, sapropelitic marls to precession minima (insolation maxima) and relatively wet climate. An alternative (glacio-eustatic) obliquity control for evaporite cyclicity can be excluded because the number of sedimentary cycles with a reversed polarity is too high.Sedimentation during the Abad, Yesares, and the overlying coastal sequences of the Sorbas Member, took place in a continuously marine environment, indicating that marine conditions in the Sorbas basin prevailed at least until 5.60±5.54 Ma. According to our scenario, deposition of the Yesares and Sorbas Member took place synchronously with deposition of the`Lower Evaporites' in the Central Mediterranean. Finally, the continental Zorreras Member consists of 8 sedimentary cycles of alternating reddish silts (dry climate) and yellowish sands (wet climate) which correlates very well with the`Upper Evaporites' and Lago Mare facies of the Mediterranean. q

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“…1), is one of the more complete Messinian stratigraphic successions and is known for the occurrence of numerous datable K-rich volcanic layers (Cunningham et al 1994(Cunningham et al , 1997Roger et al 2000;Mü nch et al 2001;Corne´e et al 2002;Kuiper 2003). Nevertheless, chronological data from the TCC are still too scarce and imprecise to accurately define relations between the platform sequences and the main events of the MSC.…”

Section: Introductionmentioning

confidence: 96%

“…These evaporites have been correlated differently within the stratigraphic succession of Messinian sedimentary deposits. Some authors correlated them with an erosional surface at the boundary separating prograding reefs and TCC, assuming that these evaporites are the Lower Evaporites of Sicily and Central Mediterranean and were deposited during a low-stand system tract (Rouchy and Saint-Martin 1992;Cunningham et al 1994Cunningham et al , 1997Roep et al 1998). Others assumed that they are the Upper Evaporites and were deposited during a transgression following a 400 kyr hiatus represented by the same surface that separates the prograding reefs from the TCC (Riding et al 1998(Riding et al , 1999.…”

Section: Introductionmentioning

confidence: 96%

Precise 40Ar/39Ar dating of volcanic tuffs within the upper Messinian sequences in the Melilla carbonate complex (NE Morocco): implications for the Messinian Salinity Crisis

Münch¹,

Cornée²,

Féraud³

et al. 2005

Int J Earth Sci (Geol Rundsch)

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International audienceThe Melilla carbonate complex (NE Morocco) is the only area of the Paleo-Mediterranean Sea where volcanic activity was present throughout most of the Messinian. 40Ar/39Ar dating of volcanic tuffs interbedded within the upper Messinian sedimentary deposits, known as the Terminal Carbonate Complex (TCC), yields accurate ages of paleoenvironmental and sea-level changes related to the Messinian Salinity Crisis. The new chronologic data (1) provide an average of 5.95– 5.99 Ma for the base of the TCC, thus being synchronous with the onset of the Messinian Salinity Crisis, (2) demonstrate for the first time that the basal unconformity of the TCC does not represent a hiatus of long duration, (3) define a precise time line at 5.87±0.02 Ma (2 σ) corresponding to sedimentary rocks exhibiting a lateral transition between continental and marine deposits typical of the TCC and (4) yield evidence that emersion of the Melilla platform during deposition of the TCC is partly related to tectono-magmatic activity. An erosional surface, capping the TCC deposits in the Melilla basin, is related to the major Messinian Mediterranean drawdown. The duration of the hiatus, associated with this surface, is estimated to be at most 450 kyr, but is probably shorter

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Magnetostratigraphic dating of an Upper Miocene shallow-marine and continental sedimentary succession in northeastern Morocco

Cited by 35 publications

References 26 publications

Correlations and sequence stratigraphic model for Messinian carbonate platforms of the western and central Mediterranean

Correlations and sequence stratigraphic model for Messinian carbonate platforms of the western and central Mediterranean

Astrochronology for the Messinian Sorbas basin (SE Spain) and orbital (precessional) forcing for evaporite cyclicity

Precise 40Ar/39Ar dating of volcanic tuffs within the upper Messinian sequences in the Melilla carbonate complex (NE Morocco): implications for the Messinian Salinity Crisis

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