Results 31 to 40 of about 1,286 (199)

The Euphrates-Tigris-Karun river system: Provenance, recycling and dispersal of quartz-poor foreland-basin sediments in arid climate [PDF]

open access: yes, 2016
We present a detailed sediment-provenance study on the modern Euphrates-Tigris-Karun fluvial system and Mesopotamian foreland basin, one of the cradles of humanity. Our rich petrographic and heavy-mineral dataset, integrated by sand geochemistry and U–Pb
Akkoca, DB   +13 more
core   +1 more source

Tectonomagmatic settings of Jurassic granitoids in the Sanandaj-Sirjan Zone, Iran: A review

open access: yesGeologos, 2022
Abstract The present paper discusses the geochemical affinities, origin and ages of Jurassic granitoids of the Sanandaj-Sirjan Zone (SaSZ) in the eastern part of the Zagros Thrust Zone. A multidisciplinary, integrated approach was carried out using existing granitoid geochemical data (major, trace, rare earth element and isotopes) and ...
Karimpour Mohammad Hassan   +2 more
openaire   +2 more sources

Petrological Evolution of the Upper Mantle Beneath the Southern Sanandaj-Sirjan Zone: Evidence from Kuhshah Peridotite Massif, Southeast Iran [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2014
The Kuhshah ultramafic complex is located in the south-east of Sanandaj-Sirjan metamorphic zone, near the probable remnants of Neotethys plate in Iran. It consists of highly depleted harzburgites, dunites, chromitite bands and altered gabbros.
H. Ahmadipour
doaj  

Contribution of ultramafic rocks in central Sanandaj-Sirjan zone to the characterizing of physio-chemical condition during initiation of subduction [PDF]

open access: yesپترولوژی, 2018
In the central part of the Sanandaj-Sirjan zone, there is an ultramafic rock exposure (hornblendite and pyroxenite) adjacent to Molataleb felsic complex completely located between Azna and Aligoodarz towns.
Amir Esna-Ashari, Fatemeh Sarjoughian
doaj   +1 more source

Petrologic and geochemical constraints on the origin of Astaneh pluton, Zagros orogenic belt, Iran [PDF]

open access: yes, 2010
The Astaneh plutonic complex consists of a series of granitoid rocks ranging in composition from quartzdiorites to monzogranites and evolving from metaluminous to weakly peraluminous compositions.
Castro Dorado, Antonio   +4 more
core   +1 more source

Investigation of the formation processes in the mafic enclaves of Naqadeh plutonic rocks assemblage by zircon U-Pb dating, Sr-Nd isotopic ratios, and amphibole composition [PDF]

open access: yesپترولوژی, 2021
Naqadeh intrusive pluton is composed of two distinct sections of felsic (40 Ma age) and mafic (99 Ma age) rocks. The granitoid rocks of Naqadeh pluton have different types of mafic enclaves, including mafic microgranular enclaves (MME) and quartz ...
Seyed Ali Mazhari
doaj   +1 more source

Geochemistry, Sr-Nd-Pb isotopes and geochronology of amphibole- and mica-bearing lamprophyres in northwestern Iran: Implications for mantle wedge heterogeneity in a paleo-subduction zone [PDF]

open access: yes, 2015
Highlights: • Northwestern Iranian lamprophyres have alkaline and calc-alkaline nature. • Studied lamprophyres are emplaced during Late Cretaceous to Late Miocene time.
Aghazadeh, Mehraj   +5 more
core   +1 more source

An introduction to Irish-type Zn-Pb deposits in early Cretaceous carbonate rocks of Iran [PDF]

open access: yes, 2023
Early Cretaceous carbonates are the most common host rocks for Irish-type deposits in Iran. They are largely concentrated in the Malayer-Esfahan metallogenic belt (MEMB) in southwestern Iran, and Yazd-Anarak metallogenic belt in Central Iran.
Akbari, Zahra   +8 more
core   +1 more source

U–Pb zircon geochronology, petrochemical and Sr–Nd isotopic characteristic of Late Neoproterozoic granitoids of the Bornaward complex (Bardaskan-NE Iran) [PDF]

open access: yes, 2014
The Bornaward granitoids in the Taknar zone are located in the northeast of the central Iranian block in northeast Iran (Khorasan Razavi province), about 280 km southwest of Mashhad city and 28 km northwest of Bardaskan city.
Heidarian Shahri, M. R.   +6 more
core   +1 more source

Bashkirian foraminifera in the Sanandaj-Sirjan Zone (Iran): Their importance in taxonomy, biostratigraphy, and palaeobiogeographic reconstruction of the southern margin of Western Palaeotethys

open access: yesJournal of Asian Earth Sciences, 2023
A noteworthy Lower Pennsylvanian fusulinid fauna is, for the first time, reported from the Sanandaj-Sirjan Zone in Iran. From the main outcrop, eighty five species of thirty genera belonging to two classes, five orders, five suborders, seven superfamilies, sixteen families, and seven subfamilies are examined.
Fassihi, Shirin   +3 more
openaire   +2 more sources

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