Uranium-lead isotopic ages of plagiogranites from the Troodos ophiolite, Cyprus, and their tectonic significance

Mukasa, Samuel B.; Ludden, John

doi:10.1130/0091-7613(1987)15<825:uiaopf>2.0.co;2

Cited by 214 publications

(119 citation statements)

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“…The only rock formation that contains significantly elevated levels of uranium in Cyprus is the Plagiogranites of the Troodos mountain Ophiolite (Mukasa and Ludden, 1987).…”

Section: Introductionmentioning

confidence: 99%

Indoor radon (222Rn) concentration measurements in Cyprus using high-sensitivity portable detectors

Anastasiou

Tsertos

Christofides³

et al. 2003

Journal of Environmental Radioactivity

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Using high-sensitivity radon ( 222 Rn) portable detectors (passive electronic devices of the type RADIM3), the airborne 222 Rn concentration in the interior of various Cypriot buildings and dwellings was measured. For each preselected building and dwelling, a calibrated detector was put into a closed room, and the 222 Rn concentration was registered in sampling intervals of 2 to 4 hours for a total counting time of typically 48 hours. 222 Rn activity concentrations were found to be in the range of 6.2 to 102.8 Bq m −3 , with an overall arithmetic mean value of (19.3 ± 14.7) Bq m −3 . This value is by a factor of two 2effective dose equivalent to the Cypriot population was calculated to be between 0.16 and 2.6 mSv with an overall arithmetic mean value of (0.49 ± 0.37) mSv.

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“…The only rock formation that contains significantly elevated levels of uranium in Cyprus is the Plagiogranites of the Troodos mountain Ophiolite (Mukasa and Ludden, 1987).…”

Section: Introductionmentioning

confidence: 99%

Indoor radon (222Rn) concentration measurements in Cyprus using high-sensitivity portable detectors

Anastasiou

Tsertos

Christofides³

et al. 2003

Journal of Environmental Radioactivity

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“…The obduction events were also synchronous with the shortening all along the Syrian Arc from eastern Libya to southeastern Turkey. The sources are as follows: Antalya: Robertson and Woodcock (1981b), Montigny et al (1983), Lagabrielle et al (1986), Karaoğlan et al (2013); Troodos: Mukasza and Ludden (1987), Allerton and Vine (1991), Premoli-Silva et al (1998), Peybernès et al (2005), Karaoğlan et al (2013); Baer Bassit: Kızıldağ: Tekeli and Erendil (1986), Dilek and Delaloye (1992), Steuber et al (2009), Karaoğlan et al (2013); Cilo: Fontaine (1981), Yılmas (sic [Yılmaz]) (1985), Yılmaz and Duran (1997); Kermanshah: Braud (1987), Whitechurch et al (2013); Neyriz: Ricou (1976), Janessary and Whitechurch (2008); Oman: Tilton et al (1981), Hanna (1990), Abdelghany (2003). pulled down a subduction zone.…”

Section: Geoscience Canadamentioning

confidence: 99%

The Ayyubid Orogen: An Ophiolite Obduction-Driven Orogen in the Late Cretaceous of the Neo-Tethyan South Margin

Şengör

Stock

2014

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A minimum 5000-km long obduction-driven orogeny of medial to late Cretaceous age is located between Cyrenaica in eastern Libya and Oman. It is herein called the Ayyubid Orogen after the Ayyubid Empire that covered much of its territory. The Ayyubid orogen is distinct from other Alpide orogens and has two main parts: a western, mainly germanotype belt and an eastern mainly alpinotype belt. The germanotype belt formed largely as a result of an aborted obduction, whereas the alpinotype part formed as a result of successful and large-scale obduction events that choked a nascent subduction zone. The mainly germanotype part coincides with Erich Krenkel's Syrian Arc (Syrischer Bogen) and the alpinotype part with Ricou's Peri-Arabian Ophiolitic Crescent (Croissant Ophiolitique péri-Arabe). These belts formed as a consequence of the interaction of one of the now-vanished Tethyan plates and Afro-Arabia. The Africa-Eurasia relative motion has influenced the orogen's evolution, but was not the main causative agent. Similar large and complex obduction-driven orogens similar to the Ayyubids may exist along the Ordovician Newfoundland/Scotland margin of the Caledonides and along the Ordovician European margin of the Uralides.SOMMAIREEntre la Cyrénaïque dans l'est de la Libye et Oman, se trouve un ceinture orogénique d’au moins 5 000 km de longueur créé par obduction au Crétacé moyen et tardif. Nous le nommons ici l’orogène ayyoubide d’après l'empire ayyoubide qui couvrait une grande partie de son territoire. L'orogène ayyoubide qui est distincte des autres orogènes alpides, comporte deux parties principales : une bande occidentale, principalement germanotype, et une bande orientale principalement alpinotype. La bande germanotype s’est formée en grande partie à la suite d'une obduction avortée, tandis que la partie alpinotype s’est formée par des épisodes d’obduction à grande échelle qui ont étranglé une zone de subduction naissante. La partie principalement germanotype coïncide avec l’arc syrien d’Erich Krenkel (Syrischer Bogen), alors que la partie alpinotype correspond au croissant ophiolitique péri-Arabe de Ricou (Croissant ophiolitique péri-Arabe). Ces bandes se sont formées par l'interaction de l'une des plaques de la Téthys, maintenant disparues, avec l’Afro-Arabie. Le mouvement relatif Afrique-Eurasie a influencé l'évolution de l'orogène, mais ça n’a pas été le principal facteur. Des orogènes grandes et complexes résultant de mécanismes d’obduction similaires à l’orogène Ayyoubide peuvent exister le long de la marge des Calédonides de l'Ordovicien de Terre-Neuve/Écosse et le long de la marge européenne des Uralides de l'Ordovicien.

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“…1). U-Pb ages of plagiogranite in the Troodos sequence indicate that the ophiolite is Turonian in age, 92.1 Ma [11], suggesting formation during the Cretaceous normal magnetic Superchron spanning the period from 120.6 to 83 Ma [12]. Previous studies suggested that the Troodos massif was formed along a slow to intermediate spreading center in the suprasubduction zone within the Tethys ocean [10,13,14].…”

Section: Geological Settingmentioning

confidence: 99%

The oceanic crust in 3D: Paleomagnetic reconstruction in the Troodos ophiolite gabbro

Granot

Abelson

Ron

et al. 2006

Earth and Planetary Science Letters

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Uranium-lead isotopic ages of plagiogranites from the Troodos ophiolite, Cyprus, and their tectonic significance

Cited by 214 publications

References 0 publications

Indoor radon (222Rn) concentration measurements in Cyprus using high-sensitivity portable detectors

Indoor radon (222Rn) concentration measurements in Cyprus using high-sensitivity portable detectors

The Ayyubid Orogen: An Ophiolite Obduction-Driven Orogen in the Late Cretaceous of the Neo-Tethyan South Margin

The oceanic crust in 3D: Paleomagnetic reconstruction in the Troodos ophiolite gabbro

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