Post-Eocene volcanics of the Abazar district, Qazvin, Iran: Mineralogical and geochemical evidence for a complex magmatic evolution

Asiabanha, Abbas; Bardintzeff, Jacques-Marie; Kananian, Ali; Rahimi, G

doi:10.1016/j.jseaes.2011.09.020

Cited by 20 publications

(2 citation statements)

References 54 publications

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“…The parallel trend of chondrite-normalized (Boynton, 1984) REEs pattern in intermediate intrusive rocks suggests a similarity of magmatic processes during the formation and difference in their REEs enrichment pattern with the mafic bodies, suggesting their different origin and/or magmatic process during the evolution. The LREE/HREE enrichment in dioritic rocks is an indicator of crustal contamination or melts created in subduction zones by low degrees of partial melting (Zulkarnain, 2009;Helvacı et al, 2009;Nicholson et al, 2004;Asiabanha et al, 2012;Rollinson, 2014). The REE pattern and relatively moderate enrichment of (La/Yb) N and (Ce/Yb) N in the intermediate intrusions show that parent magma formed at a shallow depth, outside the stability field of garnet (lack of garnet at the source) or formed by low degrees of partial melting (Defant and Drummond, 1990).…”

Section: Magma Source 511 Ree Geochemistrymentioning

confidence: 99%

U-Pb zircon geochronology, geochemistry, and petrogenesis of the Hamech intrusions in the Kuh-e-Shah volcano-plutonic complex, Eastern Iran

Etemadi¹,

Karimpour²,

Shafaroudi³

et al. 2018

Turkish J Earth Sci

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Introduction The tectonic unit of eastern Iran, namely the Lut Block and the Flysch Zone, represent a complex tectonic history related to the evolution of the Sistan Ocean. The Lut Block, as the main body of eastern Iran, confined by faults, extends for about 900 km in the N-S direction (Stocklin and Nabavi, 1973) and only 200 km wide in the E-W direction. The Lut Block is composed of volcanic, volcaniclastic, subvolcanic, and intrusive rocks. The geological history of the Lut Block is characterized by magmatic activities from Middle Jurassic (the S-type Shah-Kuh granitoids; 165-162 Ma) to Cenozoic oceanic island basalts (15.5-1.74 Ma); thus, igneous rocks cover over half of this zone with up to 2000-m thickness (Karimpour et al., 2011). Meanwhile, Tertiary period (42-33 Ma) has a special importance in terms of magmatism and mineralization (Karimpour et al.

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Section: Magma Source 511 Ree Geochemistrymentioning

confidence: 99%

U-Pb zircon geochronology, geochemistry, and petrogenesis of the Hamech intrusions in the Kuh-e-Shah volcano-plutonic complex, Eastern Iran

Etemadi¹,

Karimpour²,

Shafaroudi³

et al. 2018

Turkish J Earth Sci

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“…Cenozoic magmatic rocks cover much of Iran to the north of the Zagros suture zone (Figure ). Although their ages vary from Palaeocene to Quaternary, the Eocene pulse is more predominant (Asiabanha, Bardintzeff, Kananian, & Rahimi, ; Verdel, Wernicke, Hassanzadeh, & Guest, ). Three Cenozoic magmatic arcs are recognized in Iran (Figure ) including (i) the Alborz magmatic arc in east–west direction, which continues into the magmatic belts of Pontides in Turkey (Castro, Aghazadeh, Badrzadeh, & Chichorro, ; Dilek, Imamverdiyev, & Altunkaynak, ); (ii) the Urumieh–Dokhtar Magmatic Arc (UDMA), formed by north‐eastward subduction of the Neotethyan Ocean beneath Iran (Berberian & King, ); and (iii) the east Iranian magmatic arc, formed as the result of eastward subduction of the Birjand‐Sistan Ocean beneath the Lut Block.…”

Section: Introductionmentioning

confidence: 99%

Geochemical characteristics of igneous rocks associated with Baghu gold deposit in the Neotethyan Torud‐Chah Shirin segment, Northern Iran

et al. 2018

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The Baghu gold deposit, hosted by a granitoid stock as well as volcanic rocks, is located in Northern Iran. The igneous rocks consist of granodiorite and granite as well as volcanic rocks, such as basaltic andesite and andesite, which are cut by dioritic dykes. The igneous rocks have metaluminous, high K calc-alkaline, and islandarc signatures, characterized by enrichment in large-ion lithophile elements (LILEs) and depletion in high-field-strength elements (HFSEs). Zircon separates yield U-Pb ages of 47, 43, and 38 Ma for the volcanics, granitoid rocks, and dyke, respectively, indicating that the magmatism associated with gold-copper mineralization occurred during the Eocene. The low Ba/Th, Th/Nb, Ba/La, and Th/Yb ratios in igneous rocks indicate that their mantle source was not likely modified by subduction activity. A comparison of La/Sm against La (ppm), similar Th/Nb and Th/Yb, and average (La/Yb) n ratios to the crust and lower continental crust (LCC) suggests that the magmatism in the Baghu was likely associated with partial melting of juvenile lower crust, induced by north-westward subduction of the Neo-Tethys oceanic lithosphere in an extensional setting.

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Petrochemistry and tectonic setting of the Davarzan-Abbasabad Eocene Volcanic (DAEV) rocks, NE Iran

Ghasemi

Rezaei-Kahkhaei

2014

Miner Petrol

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The Davarzan-Abbasabad Eocene Volcanics (DAEV) is located at the northeastern edge of the volcanic-plutonic belt of the Central Iran structural zone. DAEV start with continental to shallow marine sediments of the Paleocene-Eocene and then continue extensively with shallow submarine to sub-aerial basaltic and andesitic volcanics, related volcaniclastics and sedimentary rocks during the Middle-Upper Eocene. The volcanics are olivine basalts, basaltic andesites and andesites in composition and show porphyric, hyaloporphyritic, glomeroporphyric, fluidal, and seriate textures. The geochemistry of DAEV points to a fractional series from olivine basalt to andesite with transitional and medium to high K calc-alkaline nature. Their primitive mantle and chondrite-normalized trace element patterns show that these rocks have high light-and low heavy rare earth elements and are enriched in large-ion lithophile elements and depleted in high field strength elements (Nb, Ti, P, and Zr). Integration of geochemical and petrological data with regional studies indicates that the magma(s) forming the DAEV rocks were derived from 14 to 16 % partial melting of an enriched mantle source in 70-100 km depths during Middle-Upper Eocene time in an intra-arc extensional setting. This mantle source had been previously metasomatized by fluids derived from Sabzevar Neo-Tethyan-subducted slab during the Upper Cretaceous-Paleocene.

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Post-Eocene volcanics of the Abazar district, Qazvin, Iran: Mineralogical and geochemical evidence for a complex magmatic evolution

Cited by 20 publications

References 54 publications

U-Pb zircon geochronology, geochemistry, and petrogenesis of the Hamech intrusions in the Kuh-e-Shah volcano-plutonic complex, Eastern Iran

U-Pb zircon geochronology, geochemistry, and petrogenesis of the Hamech intrusions in the Kuh-e-Shah volcano-plutonic complex, Eastern Iran

Geochemical characteristics of igneous rocks associated with Baghu gold deposit in the Neotethyan Torud‐Chah Shirin segment, Northern Iran

Petrochemistry and tectonic setting of the Davarzan-Abbasabad Eocene Volcanic (DAEV) rocks, NE Iran

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