Quaternary high-Mg ultrapotassic rocks from the Qal'eh Hasan Ali maars, southeastern Iran: petrogenesis and geodynamic implications

doi:10.1007/s00410-015-1183-y

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Quaternary high-Mg ultrapotassic rocks from the Qal'eh Hasan Ali maars, southeastern Iran: petrogenesis and geodynamic implications
	Pang, Kwan-Nang 1; Chung, Sun-Lin 1,2; Zarrinkoub, Mohammad Hossein 3; Wang, Fei 4; Kamenetsky, Vadim S.5; Lee, Hao-Yang 2
刊名	CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
	2015-09-01
卷号	170 期号:3
关键词	Kamafugite Ultrapotassic Iran Post-collisional Metasomatism Lithospheric mantle
DOI	10.1007/s00410-015-1183-y
文献子类	Article
英文摘要	A set of rare, high-Mg ultrapotassic rocks from the Qal'eh Hasan Ali maars, southeastern Iran, was investigated using phlogopite Ar-40/Ar-39 geochronology, olivine chemistry, and bulk-rock elemental and Sr-Nd-Hf isotopic geochemistry to decipher their petrogenesis and regional tectonic implications. Phlogopite separates yield inverse isochron Ar-40/Ar-39 ages from ca. 112 to 119 ka, indicating that magma genesis postdated the onset of the Arabia Eurasia collision at the Late Eocene-Early Oligocene. The studied rocks are characterized by kamafugitic affinity with relatively low SiO2 and Al2O3 and high CaO and Sr. They contain relatively primitive olivine (Fo(85-92)) that, on the basis of olivine liquid Fe/Mg exchange equilibrium, suggests the primary melt to be ultrapotassic with similar to 13 wt% MgO. Other key geochemical features include extreme enrichment in most incompatible trace elements, depletions in Nb, Ta, P and Ti and enrichment in Pb relative to elements of similar incompatibilities. The Sr-Nd-Hf isotopic ratios of the rocks do not deviate significantly from the bulk silicate Earth (Sr-87/Sr-86 = 0.7055-0.7059, Nd-143/Nd-144 = 0.5125-0.5126 and Hf-176/Hf-177 = 0.2827-0.2829). Relatively high Zn/Fe, Gd/Yb, Rb, Rb/Sr and P2O5 and low Yb and P/P* for the rocks are consistent with derivation from a mantle source containing clinopyroxene, phlogopite, apatite and garnet that formed in response to modal metasomatism in the lithospheric mantle. Relatively low Hf/Nd and high Sr/Hf of the rocks indicate that the metasomatized lithologies from which the studied rocks formed were derived dominantly from subducted marly sediments. The Qat'eh Hasan Ali magmatism is best explained by small-scale destruction of the continental mantle in a post-collisional setting, presumably driven by localized convective instability as a result of the Arabia Eurasia collision.
WOS关键词	ARABIA-EURASIA COLLISION ; LUT-SISTAN REGION ; MILK RIVER AREA ; U-PB AGE ; TRACE-ELEMENT ; POSTCOLLISIONAL MAGMATISM ; ALBORZ MOUNTAINS ; SOUTHERN TIBET ; EASTERN IRAN ; NW IRAN
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
WOS记录号	WOS:000361649200004
资助机构	University of Birjand ; University of Birjand ; National Taiwan University ; National Taiwan University ; Ministry of Science and Technology, Taiwan, ROC(MOST 103-2745-M-002-005-ASP) ; Ministry of Science and Technology, Taiwan, ROC(MOST 103-2745-M-002-005-ASP) ; University of Birjand ; University of Birjand ; National Taiwan University ; National Taiwan University ; Ministry of Science and Technology, Taiwan, ROC(MOST 103-2745-M-002-005-ASP) ; Ministry of Science and Technology, Taiwan, ROC(MOST 103-2745-M-002-005-ASP)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62244]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan 2.Natl Taiwan Univ, Dept Geol, Taipei 106, Taiwan 3.Univ Birjand, Dept Geol, Birjand, Iran 4.Chinese Acad Sci, Paleomagnetism & Geochronol Lab, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Univ Tasmania, Sch Phys Sci, Hobart, Tas 7001, Australia
推荐引用方式 GB/T 7714	Pang, Kwan-Nang,Chung, Sun-Lin,Zarrinkoub, Mohammad Hossein,et al. Quaternary high-Mg ultrapotassic rocks from the Qal'eh Hasan Ali maars, southeastern Iran: petrogenesis and geodynamic implications[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2015,170(3).
APA	Pang, Kwan-Nang,Chung, Sun-Lin,Zarrinkoub, Mohammad Hossein,Wang, Fei,Kamenetsky, Vadim S.,&Lee, Hao-Yang.(2015).Quaternary high-Mg ultrapotassic rocks from the Qal'eh Hasan Ali maars, southeastern Iran: petrogenesis and geodynamic implications.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,170(3).
MLA	Pang, Kwan-Nang,et al."Quaternary high-Mg ultrapotassic rocks from the Qal'eh Hasan Ali maars, southeastern Iran: petrogenesis and geodynamic implications".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 170.3(2015).