Geochemistry and petrogenesis of Kolah-Ghazi granitoids of Iran: Insights into the Jurassic Sanandaj-Sirjan magmatic arc

doi:10.1016/j.chemer.2017.02.003

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	Geochemistry and petrogenesis of Kolah-Ghazi granitoids of Iran: Insights into the Jurassic Sanandaj-Sirjan magmatic arc
	Bayati, Marzieh 1; Esmaeily, Dariush 1; Maghdour-Mashhour, Reza 2; Li, Xian-Hua 3; Stern, Robert J.4
刊名	CHEMIE DER ERDE-GEOCHEMISTRY
	2017
卷号	77 期号:2 页码:281-302
关键词	Zircon U-Pb dating Jurassic magmatism S-type granite Neo-Tethys Sanandaj Sirjan zone
ISSN号	0009-2819
DOI	10.1016/j.chemer.2017.02.003
文献子类	Article
英文摘要	Kolah-Ghazi granitoid (KGG), situated in the southern part of the Sanandaj-Sirjan Zone (SNSZ), Iran, is a peraluminous, high K calc-alkaline, cordierite-bearing S-type body that is mainly composed of monzogranite, granodorite and syenogranite. Zircon U-Pb ages indicate that the crystallization of the main body occurred from 175 Ma to 167 Ma. Two kinds of xenoliths are found in KKG rocks: (i) xenoliths of partially melted pelites including cordierite xenocrysts and aluminoslicates, and (ii) mafic microgranular enclaves that reflect the input of mantle-derived mafic magmas. Field observations and geochemical data of KGG rocks are consistent with their derivation from a multiple sources including melts of metasediments and mantle-derived melts. We infer that these magmas originated by the anatexis of a metasedimentary source (mixture of metapelite and metagreywacke) in the mid-to lower-crust under low water-vapor pressures (0.5-1 Kbar) and temperature of similar to 800 degrees C. KGG is the product of biotite incongruent melting of this metasedimentary source. S-type granites are commonly thought to be produced in continent continent collision tectonic environment. However, trace element discrimination diagrams show that S-type KGG rocks formed in an arc-related environment. The roll-back of Neo-Tethyan subducting slab accompanying oblique subduction in Late Triassic to Early Jurassic time induced trench rollback, back arc basin opening and filling with turbidite flysch and molasse-type siliciclastic sediments of the Shemshak Group on the overriding plate. Further changes in the subducting slab to flat subduction in Middle Jurassic time, the time of peak magmatism in the SNSZ, led to thickening and high temperature-low pressure metamorphism of the backarc turbidite deposits and consequent anatexis of the metasedimentary source to produce the KGG S-type rocks along with several other I-type granitoids in the SNSZ. (C) 2017 Elsevier GmbH. All rights reserved.
WOS关键词	METAMORPHIC BELT ; WESTERN IRAN ; CONTINENTAL COLLISION ; PERALUMINOUS MAGMAS ; CALC-ALKALINE ; ROCKS ; ZONE ; EVOLUTION ; COMPLEX ; AREA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER GMBH, URBAN & FISCHER VERLAG
WOS记录号	WOS:000404203400004
资助机构	"Strategic Priority Research Program (B)" of the Chinese Academy of Sciences(XDB03010800) ; "Strategic Priority Research Program (B)" of the Chinese Academy of Sciences(XDB03010800) ; "Strategic Priority Research Program (B)" of the Chinese Academy of Sciences(XDB03010800) ; "Strategic Priority Research Program (B)" of the Chinese Academy of Sciences(XDB03010800)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/51790]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Bayati, Marzieh
作者单位	1.Univ Tehran, Fac Sci, Dept Geol, Tehran 1415564155, Iran 2.Univ Witwatersrand, Sch Geosci, Fac Sci, Johannesburg, South Africa 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Univ Texas Dallas, Geosci Dept, Richardson, TX 75083 USA
推荐引用方式 GB/T 7714	Bayati, Marzieh,Esmaeily, Dariush,Maghdour-Mashhour, Reza,et al. Geochemistry and petrogenesis of Kolah-Ghazi granitoids of Iran: Insights into the Jurassic Sanandaj-Sirjan magmatic arc[J]. CHEMIE DER ERDE-GEOCHEMISTRY,2017,77(2):281-302.
APA	Bayati, Marzieh,Esmaeily, Dariush,Maghdour-Mashhour, Reza,Li, Xian-Hua,&Stern, Robert J..(2017).Geochemistry and petrogenesis of Kolah-Ghazi granitoids of Iran: Insights into the Jurassic Sanandaj-Sirjan magmatic arc.CHEMIE DER ERDE-GEOCHEMISTRY,77(2),281-302.
MLA	Bayati, Marzieh,et al."Geochemistry and petrogenesis of Kolah-Ghazi granitoids of Iran: Insights into the Jurassic Sanandaj-Sirjan magmatic arc".CHEMIE DER ERDE-GEOCHEMISTRY 77.2(2017):281-302.