Mendeley
TY  _  JOUR
ID  -  geology-46989
TI  -   Geochemistry and petrogenesis of the subvolcanic domes of the northern domain of the Sabzevar ophiolitic belt, north east of Iran
JO  -  Iranian Journal of Geology
JA  -  ES
LA  -  fa
SN  -  1735-7128
AU  -  Mohammadi Gorji E.
AU  -  Ghorbani Ghasem
AU  -  Shafaii Moghadam Hadi
AD  -  دانشکده علوم زمین، دانشگاه دامغان، دامغان، ایران
AD  -  علوم زمین
AD  -  دانشگاه دامغان
Y1  -  2024
PY  -  2024
VL  -  69
IS  -  
SP  -  67
EP  -  82
KW  -   Andesite
KW  -   Dacite
KW  -   High-silica adakites
KW  -   Sr-Nd isotopes
KW  -   Subduction
DO  -  
N2  -  
Andesitic-dacitic subvolcanic domes of Nudeh Enghelab and Kuh Kamartang are located in the northern domains of the Sabzevar ophiolitic belt, and in the northeast part of the Central Iran structural zone. Geochemically, the studied rocks exhibit a metaluminous, calc-alkaline to high k-calc-alkaline nature, and are enriched in LILE and LREE and depleted in HFSE, HREE and negative anomaly in TNT elements, and have formed in an environment related to subduction zone. With attention to their other geochemical characteristics, such as a silica content (SiO2>61wt%), Al2O3>15wt%, MgO<2.2wt%, Na2O>3.3wt%, Sr/Y>24, La/Yb>8, can be classified these rocks as high silica adakites. The petrographical, geochemical and isotopic ((87Sr/86Sr)i=0.7047-0.7045, ƐNdi=6.02-6.10) characteristics display that the studied high silica adakites have been originated from partial melting of subducted oceanic slab of Neo-Tethys (Sabzevar sea/ocean sub-branch) under the Turan plate in amphibolite to garnet amphibolite facies and during the ascent to high levels, they show very little assimilation and contamination with continental crust.


UR  - rimag.ir/en/Article/46989
L1  - rimag.ir/en/Article/Download/46989
ER  -  
