Geodynamic Implications of Jurassic Ophiolites Associated with Island-Arc Volcanics, South Apuseni Mountains, Western Romania

Bortolotti, Valerio; Marroni, Michèle; Nicolae, Ionel; Pandolfi, Luca; Principi, Gianfranco; Saccani, Emilio

doi:10.2747/0020-6814.44.10.938

Cited by 37 publications

(43 citation statements)

References 22 publications

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“…It is in agreement with the presumed closure of the Eastern Branch of the Vardar Zone (Karamata et al 1999) and the emplacement of Mures ophiolites (e.g. Bortolotti et al 2002).…”

Section: Age Of the Zocsupporting

confidence: 74%

Origin and Evolution of the Ophiolitic Complex of Zdraljica (Central Serbia)

et al. 2004

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The ophiolitic complex of Zdraljica (Central Serbia) belongs to the Eastern Branch of the Vardar suture zone. It was emp'aced during the Upper Jurassic. The complex consists predominately of a MORB/VAB-like tholeiitic suite, represented mostly by gabbros and diabases. Small occurrences of cummulitic peridotites, basalts and plagiogranites also appear. The tholeiitic suite is intruded by calc-alkaline intermediate and acid magmas. Geochemical data suggest that the ZOC tholeiitic rocks originated by partial melting of a spinel-lherzolite source. Non-modal batch melting modeling indicates 10 to 15 % of partial melting of such a source. The magmas were later modified by fractional crystallization. One-step major element modeling requires 40% (F=0.60) of fractional crystallization of a mineral assemblage: PI52 gCpxi2 5OI26 iTtn2 9Ap4.4Mgt1.0-The model is supported by the variation patterns of most trace elements.

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“…It is in agreement with the presumed closure of the Eastern Branch of the Vardar Zone (Karamata et al 1999) and the emplacement of Mures ophiolites (e.g. Bortolotti et al 2002).…”

Section: Age Of the Zocsupporting

confidence: 74%

Origin and Evolution of the Ophiolitic Complex of Zdraljica (Central Serbia)

et al. 2004

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“…The most recent and widely accepted interpretation suggests that the Sava-Vardar Zone (SVZ) is the relict of the youngest Tethyan realm. According to this standpoint, most Balkan ophiolites, which occur along three sub-parallel belts roughly extending NNW-SSE, were emplaced during the Late Jurassic (Robertson & Karamata 1994;Bortolotti et al 2002;Schmid et al 2008;and references therein). These ophiolite belts have been given different names, and those most often used are East and West Vardar and Dinaric ophiolites (see Schmid et al 2008).…”

Section: Introductionmentioning

confidence: 99%

The Upper Cretaceous ophiolite of North Kozara – remnants of an anomalous mid-ocean ridge segment of the Neotethys?

Cvetković¹,

Šarić²,

Grubić³

et al. 2014

Geologica Carpathica

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This study sheds new light on the origin and evolution of the north Kozara ophiolite, a part of the Sava-Vardar Zone. The Sava-Vardar Zone is regarded as a relict of the youngest Tethyan realm in the present-day Balkan Peninsula. The north Kozara ophiolite consists of a bimodal igneous association comprising isotropic to layered gabbros, diabase dykes and basaltic pillow lavas (basic suite), as well as relicts of predominantly rhyodacite lava flows and analogous shallow intrusions (acid suite). The rocks of the basic suite show relatively flat to moderately light-REE enriched patterns with no or weak negative Eu-anomaly, whereas those of the acid suite exhibit steeper patterns and have distinctively more pronounced Eu-and Sr-negative anomalies. Compared to the known intra-ophiolitic granitoids from the Eastern Vardar Zone, the acid suite rocks are most similar to those considered to be oceanic plagiogranites. The new geochemical data suggest that the basic suite rocks are similar to enriched mid-ocean ridge basalts. The geochemical characteristics of the acid suite rocks indicate that their primary magmas most probably originated via partial melting of gabbros from the lower oceanic crust. Our study confirms the oceanic nature of the north Kozara Mts rock assemblage, and suggests that it may have formed within an anomalous ridge setting similar to present-day Iceland.

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“…Istočna vardarska zona (IVZ), obuhvata krajnji istočni (slika 1), uski pojas ofiolita, koji se severno prostire do Apusenskih planina u Rumuniji [2], [3], [4], [5], zatim se pruža kroz centralni deo Srbije gde uključuje ofiolite Ždraljice i Kuršumlije, da bi se prema jugu nastavio u Peonias zonu u Makedoniji i Grčkoj. Na prostoru Makedonije ofiolitski kompleksi 1 Akrecioni melanž je haotična sedimentna jedinica tektonskog porekla, nastala tokom procesa akrecije, odnosno prirastanja.…”

Section: Uvodunclassified