Über den Westlichen Abschnitt der Betischen Kordillere und Seine Beziehungen zum Gesamtorogen

Hoeppener, Rolf; Hoppe, P.; Mollat, Hartmut; Muchow, Sarah; Dürr, St.; Kockel, Franz

doi:10.1007/bf02040751

Cited by 20 publications

(7 citation statements)

References 11 publications

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“…In the vicinity of the peridotites, the Alpujárride crustal rocks show systematically the highest metamorphic grade and extensive melting (Acosta-Vigil et al, 2001;Argles et al, 1999;Balanyá et al, 1997;Esteban et al, 2008;Obata, 1980;Torres-Roldán, 1983;Tubía et al, 1997). Los Reales and Blanca constitute the two westernmost and highest-grade Alpujárride units (Hoeppener et al, 1964;Mollat, 1968;Navarro-Vilá and Tubía, 1983). Los Reales is a strongly condensed, 5 km-thick, crustal section recording an increasing metamorphic grade, from unmetamorphosed and greenschist-facies carbonates and phyllites at the top (though recording pressures of 0.7-0.8 GPa, at 200-350°C), to greenschist and amphibolite-facies schists towards the middle, and granulite-facies felsic gneisses at the bottom (with pressures up to 1.3-1.4 GPa, at 700-800°C) (Platt et al, 2003a;Torres-Roldán, 1981).…”

Section: Metamorphism In the Alpujárride Units In The Vicinity Of Thementioning

confidence: 97%

Age of anatexis in the crustal footwall of the Ronda peridotites, S Spain

Acosta-Vigil

Rubatto

Bartoli

et al. 2014

Lithos

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This study investigates the age of anatexis of a crustal sequence constituting the footwall of the Ronda peridotite slab, in the hinterland of the Betic Cordillera (S Spain, region of Istán). These rocks represent a polymetamorphic basement involved in the Alpine orogeny and show an increase in the proportion of melt towards the peridotites. Metamorphic conditions in the migmatites vary between T ≈ 675–750 °C at P ≈ 0.30–0.35 GPa. The timing of metamorphism and deformation of the migmatites around the Ronda peridotites is controversial and has been previously ascribed to either the Alpine or Variscan orogenies. We present U–Pb SHRIMP dating of zircons from six samples collected across the migmatitic sequence that provide a tighter age constraint on the metamorphism. Zircon ages are related to conditions of metamorphism on the basis of the relationships between zircon microstructures and degree of melting recorded by the host rocks. Anatexis occurred during the late stages of the Variscan orogeny (≈ 280–290 Ma), as indicated by ages of euhedral, oscillatory-zoned domains or new crystals in metatexites and diatexites. Thin, U-rich zircon rims that are affected by radiation damage yield discordant scattered dates between ≈ 260 and 30 Ma, which are interpreted as reflecting a thermal and fluid overprint during the Alpine orogeny that produced recrystallization and Pb loss in Permian zircons. This study identifies a previously unknown Variscan domain within the Betic Cordillera, and indicates, in accordance with previous studies, that Variscan basements recycled during the Alpine orogeny that formed the Betic Cordillera preserve pre-Alpine mineral associations and tectonic fabrics

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Section: Metamorphism In the Alpujárride Units In The Vicinity Of Thementioning

confidence: 97%

Age of anatexis in the crustal footwall of the Ronda peridotites, S Spain

Acosta-Vigil

Rubatto

Bartoli

et al. 2014

Lithos

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“…All relevant publications agree on a lithostratigraphical unit that spans the blocks north and south of the Strait of Gibraltar since early geological times (HoEPPENER et al, 1968). All relevant publications agree on a lithostratigraphical unit that spans the blocks north and south of the Strait of Gibraltar since early geological times (HoEPPENER et al, 1968).…”

Section: Rotating Mieroplates In the Mediterraneanmentioning

confidence: 72%

Intraplate tectonics in stable Europe as related to plate tectonics in the Alpine system

Illies

1975

Geol Rundsch

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ZusammenfassungWesteuropa ist von einem Schwarra k~,inozoiseher Griiben durehzogen. Die Stadien der Grabenbildung ereigneten sich gleichzeitig mit den Episoden verst~rkter Faltung in den Alpen. Das Aufreil3en des Rheingrabens wurde dureh einen Manteldiapirismus ausgelSst, die alpine Orogenese dagegen durch Subduktion yon Lithosphtire. Es wird angenommen, dab der Subduktionsvorgang im Alpenbereich den Mantelaufstieg im Vorland bedingt hat.Die mitteleoz~ine bis oligoz~ine Zerrungstektonik des Rheingrabens setzt eine Kompression parallel zur Grabenachse in ca. 20~voraus. Im selben Gebiet betr~igt die rezente Richtung maximaler Kompressionsspannung ca 820 ~ (NW), wie in situ stress-Messungen, Herdfl:,iehenlSsungen yon Erdbeben sowie rezente Krustenbewegungen erkennen lassen. Die sinistrale Rotation des Beansprnchungsplans relativ zur Kruste des stabilen Europa hat sich im Anschlul3 an eine entspreehende Rotation yon Mikroplatten im Mittelmeerraum vollzogen. Diese Rotationen werden alternierenden Scherbewegungen zugesehrieben, welche sich zwischen dem stabilen Europa und den Afro-Arabischen Platten im Laufe des K~inozoikums ereignet haben. Hierdurch wurden die zwischengelagerten Mikroplatten einem Kugellager-Effekt ausgesetzt. Die postulierten Scherbewegungen entsprechen der alternierenden Gesehwindigkeitsverteilung des ocean floor spreading beiderseits der afrikanischen Platte. Die Stadien alpiner Plattenkollision hatten entsprechende Umorientierungen des intraplate stress-Feldes in den kratonisierten Bereichen des mitteleurop~iischen Vorlandes im Gefolge. AbstractWestern Europe is traversed by the Rhinegraben rift system. The stages of graben formation evolved coineidentally with the culminations of compressional folding in the Alps, Rhinegraben rifting has been controlled by mantle diapirism, but the Alpine orogeny by subduction of lithosphere. Presumably, Alpine subduction forced compensating mantle uplift in the foreland.The Middle Eocene to Oligocene crustal spreading of the Rhinegraben implies a state of stress with a maximum horizontal component parallel to the graben axis (about 20~ In the same area, the Recent average direction of maximum compressive stress is of about 820 ~ (NW), as calculated by in-situ stress measurements, fault-plane solutions of earthquakes and Recent crustal movements. The rotation of the stress components relative to the ernst of stable Europo evolved subsequent to counterclockwise rotations of microplates in the Mediterranean. A model is proposed which ascribes these rotations to alterating shear motions of the Afro-Arabian macroplates relative to stable Europe exerting a ball-bearing effect to the intervenient microplates. The 05JIaCTH nMeeT HanpaBJieHHe npHMepHo 320 ~ r.e. ceBepo-3ana~Hoe, Kai~ BI~ITe-EaeT It3 n3MepeHHffI cTpeeea in situ, HCcJIe~0BaHH~ O~tal"OB 3aMJIaTpHCeHHI~ H CoBpeMeHHI~IX ~BHYEeHHI:I I~0pl, I. I][OBOpOT IIJIaHa HanpYl~eHHffI OTHOCHTeJIbHO Kop~I CTaSHJIbHO~ EBpOUbI BJIeBO np0H3Orn~JI O~HOBpeMeHHO C COOTBeTCTByI~II~HM HOBO-pOTOM cpe~(H3eMHoM0pCEOffI MHEpoFJI~I6bI...

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“…In addition, the front of the internal zones, especially in its western part (Fig. 2), is characterised by several nappes and thrust slices, called Rondaide complex by Blumenthal (1927Blumenthal ( , 1949, Hoeppener et al (1963Hoeppener et al ( , 1964, Felder (1980) and Martín-Algarra (1987). These units tectonically underlie the higher Alpujarride and the Malaguide nappes.…”

Section: Geological Settingmentioning

confidence: 97%

The Middle Jurassic radiolarites and pelagic limestones of the Nieves unit (Rondaide Complex, Betic Cordillera): basin starvation in a rifted marginal slope of the western Tethys

O’Dogherty

Martín‐Algarra

Gursky

et al. 2001

International Journal of Earth Sciences

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The Middle Jurassic radiolarites and pelagic limestones of the Nieves unit (Rondaide Complex, Betic Cordillera): basin starvation in a rifted marginal slope of the western Tethys Abstract Middle Jurassic radiolarites and associated pelagic limestones occur in the Rondaide Nieves unit of the Betic Cordillera, southern Spain. The Rondaide Mesozoic includes: (a) a thick succession of Triassic platform carbonates, comparable to the Alpine Hauptdolomit and Kössen facies; (b) Lower Jurassic pelagic limestones comparable to the Alpine Hierlatz and Adnet facies; (c) the Middle Jurassic Parauta Radiolarite Formation, described herein; and (d) a thin Upper Jurassic±Cretaceous condensed limestone succession. The Parauta Radiolarite Formation and associated limestones were studied with respect to stratigraphy, petrography, micropalaeontology (radiolarians, calcareous nanno-and microfossils) and facies. Radiolarite sedimentation occurred in the Middle Bathonian in a restricted and dysoxic deep Nieves basin, perched in the distal zone of a continental margin fringing the Tethyan ocean. This margin was adjacent to a young narrow oceanic basin between the South-Iberian margin and a continental block called Mesomediterranean Terrane. The Nieves basin was part of a marine corridor between the Proto-Atlantic and Piedmont-Ligurian basins of the Alpine Tethys. The regional tectonic position, the stratigraphical evolution since the Triassic, the age and the nature of the Mesozoic facies and the palaeogeographic relations to adjacent domains show striking analogies between the Betic Rondaide margin and coeval units of the Alps.

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Über den Westlichen Abschnitt der Betischen Kordillere und Seine Beziehungen zum Gesamtorogen

Cited by 20 publications

References 11 publications

Age of anatexis in the crustal footwall of the Ronda peridotites, S Spain

Age of anatexis in the crustal footwall of the Ronda peridotites, S Spain

Intraplate tectonics in stable Europe as related to plate tectonics in the Alpine system

The Middle Jurassic radiolarites and pelagic limestones of the Nieves unit (Rondaide Complex, Betic Cordillera): basin starvation in a rifted marginal slope of the western Tethys

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