Phlogopite Ar-40/Ar-39 geochronology of mantle xenoliths from the North China Craton: Constraints on the eruption ages of Cenozoic basalts

doi:10.1016/j.gr.2012.02.015

	Phlogopite Ar-40/Ar-39 geochronology of mantle xenoliths from the North China Craton: Constraints on the eruption ages of Cenozoic basalts
	Zhao, Xin-Miao 1; Zhang, Hong-Fu 1; Su, Fei 2; Hu, Zhao-Chu 3; Lo, Ching-Hua 4; Wang, Ying 2; Yang, Sai-Hong 2; Guo, Jing-Hui 1
刊名	GONDWANA RESEARCH
	2013
卷号	23 期号:1 页码:208-219
关键词	Ar-40/Ar-39 age Phlogopite Basalt Mantle Xenolith North China Craton
ISSN号	1342-937X
DOI	10.1016/j.gr.2012.02.015
文献子类	Article
英文摘要	Mantle xenoliths provide direct information about lithospheric evolution and asthenosphere-lithosphere interaction, and therefore precise dating of the host basalts which carried the xenoliths is important. Here we report Ar-40/Ar-39 geochronology of phlogopite separates from five spinel lherzolite xenoliths collected from the North China Craton (Hannuoba of Hebei Province, Sanyitang of Inner Mongolia Autonomous Region and Hebi of Henan Province), as well as the groundmass of the host basalts. Argon extraction was performed by conventional step heating technique and ultra-violet laser ablation microprobe (UVLAMP) technique. Ar-40/Ar-39 incremental heating results on groundmass yielded geologically meaningless ages. However, conventional step heating on phlogopites produced Miocene cooling ages, identical to the eruption ages obtained from the K-Ar dating methods of the Hannuoba and Sanyitang basalts. Adopting procedures to exclude potential influence of excess radiogenic Ar from a deep fluid source on a phlogopite separate from lherzolite yielded results with a good agreement of ages suggesting that the argon isotopes are distributed homogenously in this mineral, with no influence of excess argon. Phlogopites from Hebi yield ages between 6.43 and 6.44 Ma which are slightly older than those obtained from K-Ar method on whole-rocks. The discrepancy in the K-Ar ages obtained from the altered whole-rock samples suggests partial loss of Ar-40. As a consequence, phlogopite Ar-Ar ages are considered more accurate than that of the whole-rocks. These results suggest that Ar-40/Ar-39 chronology of phlogopite provides reliable and precise Ar-40/Ar-39 ages of host basalts. (c) 2012 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
WOS关键词	ULTRAHIGH-TEMPERATURE METAMORPHISM ; SINO-KOREAN CRATON ; SOUTH-AFRICAN KIMBERLITES ; EASTERN CHINA ; LITHOSPHERIC MANTLE ; PERIDOTITE XENOLITHS ; SUBCONTINENTAL MANTLE ; TECTONIC EVOLUTION ; HANNUOBA BASALTS ; INNER-MONGOLIA
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000312746000015
资助机构	National Science Foundation of China(40903010 ; National Science Foundation of China(40903010 ; China MOST 973 Program(2009CB825001) ; China MOST 973 Program(2009CB825001) ; 41173044 ; 41173044 ; 91014007 ; 91014007 ; 90714008) ; 90714008) ; National Science Foundation of China(40903010 ; National Science Foundation of China(40903010 ; China MOST 973 Program(2009CB825001) ; China MOST 973 Program(2009CB825001) ; 41173044 ; 41173044 ; 91014007 ; 91014007 ; 90714008) ; 90714008) ; National Science Foundation of China(40903010 ; National Science Foundation of China(40903010 ; China MOST 973 Program(2009CB825001) ; China MOST 973 Program(2009CB825001) ; 41173044 ; 41173044 ; 91014007 ; 91014007 ; 90714008) ; 90714008) ; National Science Foundation of China(40903010 ; National Science Foundation of China(40903010 ; China MOST 973 Program(2009CB825001) ; China MOST 973 Program(2009CB825001) ; 41173044 ; 41173044 ; 91014007 ; 91014007 ; 90714008) ; 90714008)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87720]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhao, Xin-Miao
作者单位	1.Chinese Acad Sci, State Key Lab Lithopher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Key Lab Earths Deep Interior, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Fac Earth Sci, Wuhan 430074, Peoples R China 4.Natl Taiwan Univ, Taipei 106, Taiwan
推荐引用方式 GB/T 7714	Zhao, Xin-Miao,Zhang, Hong-Fu,Su, Fei,et al. Phlogopite Ar-40/Ar-39 geochronology of mantle xenoliths from the North China Craton: Constraints on the eruption ages of Cenozoic basalts[J]. GONDWANA RESEARCH,2013,23(1):208-219.
APA	Zhao, Xin-Miao.,Zhang, Hong-Fu.,Su, Fei.,Hu, Zhao-Chu.,Lo, Ching-Hua.,...&Guo, Jing-Hui.(2013).Phlogopite Ar-40/Ar-39 geochronology of mantle xenoliths from the North China Craton: Constraints on the eruption ages of Cenozoic basalts.GONDWANA RESEARCH,23(1),208-219.
MLA	Zhao, Xin-Miao,et al."Phlogopite Ar-40/Ar-39 geochronology of mantle xenoliths from the North China Craton: Constraints on the eruption ages of Cenozoic basalts".GONDWANA RESEARCH 23.1(2013):208-219.