Chromite and PGE geochemistry of the Elekdağ Ophiolite (Kastamonu, Northern Turkey): Implications for deep magmatic processes in a supra-subduction zone setting

Dönmez, Cahıt; Keskin, Serdar; Günay, Kurtuluş; Çolakoğlu, Aydın; Çiftçi, Yahya; Uysal, İbrahi̇m; Türkel, Aytekin; Yıldırım, Nail

doi:10.1016/j.oregeorev.2013.09.019

Cited by 44 publications

(15 citation statements)

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“…This is also not the case of our analysed Cr‐spinel (Barnes & Roeder, ; Bell & Claydon, ; Helmy & El Mahallawi, ; Krause, Brügmann, & Pushkarev, ; Nixon, Cabri, & Laflamme, ; Snoke, Quick, & Bowman, ). The changes in the composition from Al‐chromite to Fe‐chromite is related to intercumulus fluid activities at the island arc subduction zone and much close to Alaskan‐type magmatism as has been recorded from elsewhere (Arai et al, ; Arai & Miura, ; Dönmez et al, ).…”

Section: Discussionmentioning

confidence: 63%

“…The chemical composition of Cr‐spinel depends on the degree of depletion of the mantle and the type of melt formed at different tectonic settings, namely, MORB, IAT, OIB, and boninite (Arai et al, ; Zaccarini et al, ). Therefore, chromite is an important petrogenetic indicator to discriminate the tectonic setting in which the host rocks were emplaced (Arai et al, ; Dönmez et al, ; González‐Jiménez et al, ; Pal, ; Rollinson, ).…”

Section: Introductionmentioning

confidence: 99%

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Chromian spinel compositions from Madawara ultramafics, Bundelkhand Craton: Implications on petrogenesis and tectonic evolution of the southern part of Bundelkhand Craton, Central India

et al. 2018

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Madawara ultramafic complex (MUC) in the southern part of Bundelkhand Craton, Central India comprises peridotite, olivine pyroxenite, pyroxenite, gabbro, and diorite. Coarse‐grained olivine, clinopyroxene (Cpx), amphibole (Amp), Al‐chromite, Fe‐chromite, and magnetite with rare orthopyroxene (Opx) are common minerals in peridotite. Chromites are usually coarse‐grained euhedral found as disseminated crystals in the olivine matrix showing both homogeneous and zoned texture. Al‐chromite, primarily characterizes Cr‐spinels and its subsequent fluid activity and alteration can result in the formation of Fe‐chromite, chrome magnetite, and magnetite. Mineral chemistry data suggest that Al‐chromite is characterized by moderately high Cr2O3 (38.16–51.52 wt.%) and Fe2O3 (3.22–14.51 wt.%) and low Al2O3 (10.63–21.87 wt.%), MgO (1.71–4.92 wt.%), and TiO2 (0.22–0.67 wt.%), whereas the homogeneous Fe‐chromite type is characterized by high Fe2O3 (25.54–47.60 wt.%), moderately low Cr2O3 (19.56–37.90 wt.%), and very low Al2O3 (0.06–1.53 wt.%). Subsequent alteration of Al‐chromite and Fe‐chromite leads to formation of Cr‐magnetite and magnetite. The Cr# of Al‐chromite varies from 55.12 to 76.48 and γFe3+# from 8 to 19, whereas the ferrian chromite has high Cr# varying from 94.27 to 99.53 while its γFe3+# varies from 38 to 70. As a whole, the primary Al‐chromite shows low Al2O3, TiO2 contents, and high Fe#, Cr# values. Olivines have forsterite ranging from 75.96% to 77.59%. The bulk‐rock geochemistry shows continental arc geochemical affinities indicated by the high concentration of large‐ion lithophile elements and U, Th relative to the low concentration of high‐field strength elements. These petrological and mineralogical as well as primary Al‐chromite compositions plotted in different discrimination diagrams suggest an arc environment that is similar to Alaskan‐type intrusion.

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Section: Discussionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Chromian spinel compositions from Madawara ultramafics, Bundelkhand Craton: Implications on petrogenesis and tectonic evolution of the southern part of Bundelkhand Craton, Central India

et al. 2018

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“…Hickey and Frey, 1982). Similar melts of boninitic affinity have been suggested to be responsible for the formation of high-Cr chromitites from many localities such as Kempirsai in Kazakhstan (Melcher et al, 1997), Muğla in Turkey (Uysal et al, 2009a), Elekdag ophiolite in Turkey (Dönmez et al, 2014), Nidar ophiolite chromitites (Ravikant et al, 2004), Mayari-Cristal ophiolitic massif in eastern Cuba (González-Jiménez et al, 2011) and Sorkhband, Soghan and Dehsheikh ultramafic complex in Iran (Najafzadeh et al, 2008;Najafzadeh and Ahmadipour, 2014a;Peighambari et al, 2015) (Table 6). Parental melts to…”

Section: Accepted Manuscriptmentioning

confidence: 71%

“…Elekdağ ophiolite (Northern Turkey 0.65-0.89 5.10-18.20 9.40-13.20 0.14-0.26 0.20-0.40 0.40-1.90 Dönmez et al (2014) Nan Uttardite chromitites (Thailand) 11.60-12.00 Orberger et al (1995) Deep chromitites (Oman) 0. 71-0.77 11.70-14.40 11.80-12.90 0.23-0.34 Rollinson et al (2008) Massive chromitite (Kempirsai) 9.00-10.60 0.30-0.50 Melcher et al (1997) High (Ishikawa et al, 2002), Troodos (Cameron, 1985;Flower and Levine, 1987), Thetford boninites (Pagé and Barnes, 2009), and Elekdağ high-Cr chromitites (Dönmez et al, 2014) ( Fig. 10b).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Geochemistry of platinum-group elements and mineral composition in chromitites and associated rocks from the Abdasht ultramafic complex, Kerman, Southeastern Iran

Najafzadeh

Ahmadipour

2016

Ore Geology Reviews

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Spinel chemistry and geochemistry of serpentinite of North Delhi fold belt, Rajasthan: Constraining the petrogenesis and geodynamics of northwestern Indian shield

et al. 2020

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The western margin of the north Delhi fold belt, Rajasthan is mostly covered by the thick alluvium-sand cover of the Thar Desert. However, a study on a cluster of scattered and deformed serpentinite bodies exposed in the small opencast quarries are presented here. Though alteration and absence of primary phases possess constraints over petrogenesis, but, the accessory, anhedral spinel chemistry aids in the genetic reconstruction. The unaltered core part of the spinel that is, the Al-chromite (avg. 45.2 wt% Cr 2 O 3 ), followed by ferrit chromite (avg. 32.3 wt% Cr 2 O 3 ) inner rim and magnetite towards the outer rim is the character of spinels present in the host, where the chemistry of the core part is used exclusively. This core part of spinel preserves the primary mantle signature and attests the forearc peridotite character and a similar subduction-related trait is followed by the whole-rock major oxide proxies.Cumulative petrological, whole-rock geochemistry, and mineral chemical signature unequivocally advocate towards a harzburgitic protolith, an arc peridotitic character, and presence of ancient forearc environment. The present communication is the first to describe the detailed characterization of serpentinite bodies with a possible linkage towards the presence of ancient oceanic slices in the north Delhi fold belt, Rajasthan, NW India.

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Chromite and PGE geochemistry of the Elekdağ Ophiolite (Kastamonu, Northern Turkey): Implications for deep magmatic processes in a supra-subduction zone setting

Cited by 44 publications

References 88 publications

Chromian spinel compositions from Madawara ultramafics, Bundelkhand Craton: Implications on petrogenesis and tectonic evolution of the southern part of Bundelkhand Craton, Central India

Chromian spinel compositions from Madawara ultramafics, Bundelkhand Craton: Implications on petrogenesis and tectonic evolution of the southern part of Bundelkhand Craton, Central India

Geochemistry of platinum-group elements and mineral composition in chromitites and associated rocks from the Abdasht ultramafic complex, Kerman, Southeastern Iran

Spinel chemistry and geochemistry of serpentinite of North Delhi fold belt, Rajasthan: Constraining the petrogenesis and geodynamics of northwestern Indian shield

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