Early Devonian suprasubduction ophiolites of the southern Urals

Белова, Анна; Ryazantsev, A. V.; Razumovsky, A. A.; Degtyarev, K. E.

doi:10.1134/s0016852110040035

Cited by 20 publications

(8 citation statements)

References 9 publications

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“…Dikes and related volcanic rocks of the Khabarny ophiolitic association are close in geochemistry and correspond in composition to the tholeiitic and calc alkaline basalt, basaltic andesite, and andesite of nor mal alkalinity [3]. The contents and patterns of REE and other trace elements in rocks are similar to those of E MORB, but are distinguished from the latter by depletion in Th, Ta, Nb, and Zr.…”

Section: Dike Complexes In Ophiolitesmentioning

confidence: 75%

“…It is noted, however, that the ana lyzed zircons underwent intense alteration. Another date (399.8 ± 6.2 Ma) has been obtained using the same method [3].…”

Section: Dike Complexes In Ophiolitesmentioning

confidence: 99%

“…The contents and patterns of REE and other trace elements in rocks are similar to those of E MORB, but are distinguished from the latter by depletion in Th, Ta, Nb, and Zr. Available data on rock composition show their suprasubduction origin [3,34,43]. The chemical composition and structural position of the Early Devonian dike complex in the Khabarny massif suggest that it was formed in a forearc setting [3,43].…”

Section: Dike Complexes In Ophiolitesmentioning

confidence: 99%

“…Available data on rock composition show their suprasubduction origin [3,34,43]. The chemical composition and structural position of the Early Devonian dike complex in the Khabarny massif suggest that it was formed in a forearc setting [3,43].…”

Section: Dike Complexes In Ophiolitesmentioning

confidence: 99%

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Dike complexes in ophiolites of the Urals

2015

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The structure of dike complexes and their relationships with country rocks are considered for ophiolitic sections of the Polar and the Southern Urals. It has been established that composition of country rocks intruded by dikes is related to geodynamic settings of spreading. The Ordovician dike complexes of the Polar Urals and the Early Devonian complexes in the Southern Urals formed in the prearc setting contain screens of mantle, lower crustal, and upper crustal rocks pertaining to the ophiolitic section. The Late Sil urian-Early Devonian complex of dikes and volcanic rocks in the Aktau-Tanalyk Zone of the Southern Urals was formed in the course of rifting in an island arc structure. Rocks intruded by dikes are represented by island arc gabbro, plagiogranite, and calc alkaline volcanics. The Early-Middle Devonian dike complex of the West Mugodzhary Zone and the Early Devonian complex of the Dombarovsky Zone in the Southern Urals were formed in spreading zones of backarc basins, where dikes intruded the upper crustal gabbro and volcanic rocks.

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Section: Dike Complexes In Ophiolitesmentioning

confidence: 75%

“…It is noted, however, that the ana lyzed zircons underwent intense alteration. Another date (399.8 ± 6.2 Ma) has been obtained using the same method [3].…”

Section: Dike Complexes In Ophiolitesmentioning

confidence: 99%

Section: Dike Complexes In Ophiolitesmentioning

confidence: 99%

Section: Dike Complexes In Ophiolitesmentioning

confidence: 99%

See 2 more Smart Citations

Dike complexes in ophiolites of the Urals

2015

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“…Complete SSZ ophiolite sequence Nascent juvenile island arc above a zone of subduction initiation Sun, Nesbitt, 1978;Cameron et al, 1980;Cameron, 1985;Sobolev et al, 1993;Pearce, Robinson, 2010;Whattam, Stern, 2011 Pindos Ophiolite Complex, NW Greece Harper, 1984;Harper, 2003;Wallin, Metcalf, 1998;Metcalf, Shervais, 2008 Coast Range Spadea et al, 1998;Kosarev et al, 2005;Puchkov, 2010;Belova et al, 2010 Ballantrae complex ophiolite, Southwest Scotland Kerrich et al, 1988;Wyman, 1999a;Wyman, 1999b Boninite Shchipansky et al, 1999;Shchipansky et al, 2001;Bibikova et al, 2003;Shchipansky et al, 2004Shchipansky, 2008 First evidence on a subduction initiation and oceanic lithosphere extension in the Earth history Polat et al, 2002;Polat, Hoffman, 2003;Furnes et al, 2007;...…”

Section: -95 Mamentioning

confidence: 99%