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Troodos Ophiolite
The Troodos Ophiolite on the island of Cyprus represents a Late Cretaceous spreading axis (mid-ocean ridge) that has since been uplifted due to its positioning on the overriding Anatolian plate at the Cyprus arc and subduction to the south of the Eratosthenes Seamount.〔(Robertson, Alastair H. F.; ''Tectonic significance of the Eratosthenes Seamount: a continental fragment in the process of collision with a subduction zone in the eastern Mediterranean (Ocean Drilling Program Leg 160),'' Tectonophysics, Volume 298, Issues 1–3, 30 November 1998, Pages 63–82 )〕
==Stratigraphy==
The lowest units of the ophiolite are the Lower Pillow Lavas, controversially separated from the Upper Pillow Lavas. Filling spaces in between the pillows in the pillow lava units are dispersed metal oxide sediments that can also be seen as veins filling cooling fractures within the lavas. The metal oxides are ferruginous with ferromanganese oxides, clays, carbonates, volcanic glass and pelagic sediments.
Above the pillow lava units lies a layer of ferromaganiferous mudstones and clastic volcanics (the epiclastics). The epiclastites are massive altered lava fragments in a mud matrix, usually ferromanganiferous. Overlying this is the massive-finely laminated ferromanganese muds. Between the epiclastics and muds lie background accumulations of pelagic sediment.
To the south there is the Mathiati-Margi massive sulfide ore body and stockwork mineralisation. The sulfide ore occurs at the same stratigraphic level as the Lower and Upper pillow lava contact, and is overlain by unmineralised lavas.〔(Boyle, J. F. and A. H. F. Robertson, ''Evolving metallogenesis at the Troodos spreading axis'', Geological Society, London, Special Publications 1984, v. 13, p. 169-181 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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