Geochemical characteristics of basaltic rocks from the Nain ophiolite (Central Iran); constraints on mantle wedge source evolution in an oceanic back arc basin and a geodynamical model

Ghazi, Javad Mehdipour; Moazzen, Mohssen; Rahgoshay, Mohammad; Moghadam, Hadi Shafaii

doi:10.1016/j.tecto.2011.10.001

Cited by 33 publications

(29 citation statements)

References 83 publications

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“…2). The presence of a volcanic arc and an island arc indicates that two subductions, one is oceanic-oceanic and the other oceanic-continental, were active (Ghasemi and Talbot 2006;Agard et al 2007;Ghazi et al 2012;Saccani et al 2013). The oceanic-oceanic subduction arcrelated calc-alkaline granitoid rocks of Siah Kuh of Early Jurassic age (199 Ma;Arvin et al 2007) and other similar rocks are reported from the SSMB (Berberian and Berberian 1981;Malekizadeh 1999;Shahabpour 2007).…”

mentioning

confidence: 74%

“…A back-arc basin of the southern Neotethys Basin existed between the Central Iran and Sanandaj-Sirjan (Glennie 1992;Ghazi and Hassanipak 1999;Golonka 2004;Ghasemi and Talbot 2006;Shafaii Moghadam et al 2009;Ghazi et al 2011Ghazi et al , 2012. The IZOB is a result of this back-arc basin closure.…”

Section: The Inner Zagros Ophiolitic Belt (Izob)mentioning

confidence: 99%

“…The Nain Ophiolite is related to the closure of the Neotethys back-arc basin (Ghasemi and Talbot 2006;Rahmani et al 2007;Ghazi et al 2012). The Nain Ophiolite mantle sequence includes serpentinized harzburgite, with some lherzolite and pyroxenite sills, and its crustal sequence includes plutonic and volcanic rocks, such as pegmatitic gabbro, diorite, granodiorite, diabase, basaltic andesite, andesite, and more silicic rocks (tonalite, trondhjemite, and aplite) ( Fig.…”

Section: The Nain Ophiolitementioning

confidence: 99%

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Tectonic evolution of the Zagros Orogen in the realm of the Neotethys between the Central Iran and Arabian Plates: An ophiolite perspective

Ajirlu

Moazzen

Hajialioghli

2016

Central European Geology

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mentioning

confidence: 74%

Section: The Inner Zagros Ophiolitic Belt (Izob)mentioning

confidence: 99%

Section: The Nain Ophiolitementioning

confidence: 99%

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Tectonic evolution of the Zagros Orogen in the realm of the Neotethys between the Central Iran and Arabian Plates: An ophiolite perspective

Ajirlu

Moazzen

Hajialioghli

2016

Central European Geology

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“…Some elements are relatively mobile, whereas others are relatively immobile (Guilmette et al, 2009). For example, K, Na, Si, and Ca are mobile under conditions of greenschist-and amphibolite-facies meta morphism, while Ti, Al, Mn, and P are relatively stable and Zr, Sc, and Y are very immobile under such conditions (Ghazi et al, 2012;Coish, 1977;Winchester and Floyd, 1977;Pearce and Cann, 1973). In addition, some researchers have sugges ted that elements with high ionic potential (e.g., K, Ba, Sr, Cs, and Rb) are mobile, while Ta, Nb, trace elements (Cr, Co, Ni, V), and REEs are stable during greenschist-and amphibolite-facies metamorphism (Mullen, 1983;Seewald et al, 1990).…”

Section: Metamorphism and Elemental Mobilitymentioning

confidence: 99%

“…Volcanic rock associations preserved in ophiolites generally offer a means of assessing the processes and conditions of basaltic magmatism through time (Ghazi et al, 2012). Therefore, the study of volcanic rocks provides a key for evaluating the evolution of the oceanic lithosphere.…”

Section: Introductionmentioning

confidence: 99%

Petrology and geochemistry of metabasalts from the Taoxinghu ophiolite, central Qiangtang, northern Tibet: Evidence for a continental back-arc basin system

Wu¹,

Cai²,

Xu³

et al. 2016

AJES

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Newly discovered ophiolitic metabasalts in the Taoxinghu area of central Qiangtang on the Qinhai-Tibet Plateau, here described for the first time, have important implications for reconstructions of the tectonic history of the Paleo-Tethys Ocean. Most of the metabasalts belong to the tholeiitic basalt series and most have undergone greenschist-facies metamorphism. The distribution of rare earth elements and trace elements shows that the rocks are typical of sub-continental margin arc-basin lavas, similar to the environment of formation of the present-day Okinawa lava, suggesting that the Taoxinghu metabasalts represent the upper portions of a supra-subduction zone (SSZ)-type ophiolite that formed in a continental back-arc basin tectonic environment. The Taoxinghu metabasalts are mainly sourced from a depleted spinel mantle-source region, with a spinel lherzolite content equivalent to partial melting of 6 %-25 %. In addition, lava compositions were likely affected by melting of sediments during subduction, while the influence of aqueous fluids was minor. Combining with the existing knowledge on the ophiolites of Longmuco-Shuanghu-Lancang suture zone (LSLSZ), an evolutionary model is proposed. The LSLSZ Paleo-Tethys Ocean basin may have started to form during the Cambrian or earlier, and subducted in the early Carboniferous. As subduction proceeded, a continental back-arc basin was developed, the site of generation of most of the Taoxinghu metabasalts. The LSLSZ Paleo-Tethys Ocean finally closed in the Triassic.

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Jurassic rifting at the Eurasian Tethys margin: Geochemical and geochronological constraints from granitoids of North Makran, southeastern Iran

et al. 2015

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This study focuses on an east-west trending belt of granitic to intermediate intrusions and their volcanic cover in the northern Dur Kan Complex, a continental slice outcropping to the north of the exposed Makran accretionary wedge in southeastern Iran. Field observations, petrographic descriptions, trace element, and isotope analyses combined with U-Pb zircon geochronology are presented to determine the time frame of magmatism and tectonic setting during the formation of these rocks. Results document three magmatic episodes with different melt sources for (1) granites, (2) a diorite-trondhjemite-plagiogranite sequence, and (3) diabases and lavas. Granites, dated at 170-175 Ma, represent crystallized melt with a strong continental isotopic contribution. The diorite-trondhjemite-plagiogranite sequence is 165-153 Ma old and derives from a mantle magma source with minor continental contribution. East-west trending diabase dikes and bodies intruded the granitoids, which were eroded and then covered by Valanginian (140-133 Ma) alkaline lavas and sediments. Alkaline dikes and lavas have a mantle isotopic composition. Temporal correlation with plutonites of the Sanandaj-Sirjan Zone to the northwest defines a narrow, NW-SE striking and nearly 2000 km long belt of Jurassic intrusions. The increasing mantle influence in the magma sources is explained by thinning of continental lithosphere and related mantle upwelling/decompression melting. Accordingly, the formation of the studied igneous rocks is related to the extension of the Iranian continental margin, which ultimately led to the formation of the Tethys-related North Makran Ophiolites.

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Geochemical characteristics of basaltic rocks from the Nain ophiolite (Central Iran); constraints on mantle wedge source evolution in an oceanic back arc basin and a geodynamical model

Cited by 33 publications

References 83 publications

Tectonic evolution of the Zagros Orogen in the realm of the Neotethys between the Central Iran and Arabian Plates: An ophiolite perspective

Tectonic evolution of the Zagros Orogen in the realm of the Neotethys between the Central Iran and Arabian Plates: An ophiolite perspective

Petrology and geochemistry of metabasalts from the Taoxinghu ophiolite, central Qiangtang, northern Tibet: Evidence for a continental back-arc basin system

Jurassic rifting at the Eurasian Tethys margin: Geochemical and geochronological constraints from granitoids of North Makran, southeastern Iran

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