Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada

doi:10.1017/S0016756815001120

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

	Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada
	Wu, Fu-Yuan 1; Mitchell, Roger H.2; Li, Qiu-Li 1; Zhang, Chang1 ; Yang, Yue-Heng 1
刊名	GEOLOGICAL MAGAZINE
	2017-03-01
卷号	154 期号:2 页码:217-236
关键词	U-pb Age Sr-nd-hf Isotopes Carbonatite Prairie Lake Complex Midcontinent Rift
ISSN号	0016-7568
DOI	10.1017/S0016756815001120
文献子类	Article
英文摘要	Alkaline rock and carbonatite complexes, including the Prairie Lake complex (NW Ontario), are widely distributed in the Canadian region of the Midcontinent Rift in North America. It has been suggested that these complexes were emplaced during the main stage of rifting magmatism and are related to a mantle plume. The Prairie Lake complex is composed of carbonatite, ijolite and potassic nepheline syenite. Two samples of baddeleyite from the carbonatite yield U-Pb ages of 1157.2 +/- 2.3 and 1158.2 +/- 3.8 Ma, identical to the age of 1163.6 +/- 3.6 Ma obtained for baddeleyite from the ijolite. Apatite from the carbonatite yields the same U-Pb age of similar to 1160 Ma using TIMS, SIMS and laser ablation techniques. These ages indicate that the various rocks within the complex were synchronously emplaced at about 1160 Ma. The carbonatite, ijolite and syenite have identical Sr, Nd and Hf isotopic compositions with a Sr-87/Sr-86 ratio of similar to 0.70254, and positive epsilon(Nd)(t)(1160) and epsilon(Hf)(t)(1160) values of similar to+3.5 and similar to+4.6, respectively, indicating that the silicate and carbonatitic rocks are co-genetic and related by simple fractional crystallization from a magma derived from a weakly depleted mantle. These age determinations extend the period of magmatism in the Midcontinent Rift in the Lake Superior area to 1160 Ma, but do not indicate whether the magmatism is associated with passive continental rifting or the initial stages of plume-induced rifting.
WOS关键词	MIDCONTINENT RIFT SYSTEM ; U-PB GEOCHRONOLOGY ; COLDWELL ALKALINE COMPLEX ; LARGE IGNEOUS PROVINCES ; TRACE-ELEMENT EVIDENCE ; LASER-ABLATION ; LIQUID IMMISCIBILITY ; CRUSTAL EVOLUTION ; SUPERIOR REGION ; PHASE-RELATIONS
WOS研究方向	Geology
语种	英语
出版者	CAMBRIDGE UNIV PRESS
WOS记录号	WOS:000395444700002
资助机构	Natural Science Foundation of China(41130313) ; Natural Science Foundation of China(41130313) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Almaz Petrology and Lakehead University ; Almaz Petrology and Lakehead University ; Natural Science Foundation of China(41130313) ; Natural Science Foundation of China(41130313) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Almaz Petrology and Lakehead University ; Almaz Petrology and Lakehead University ; Natural Science Foundation of China(41130313) ; Natural Science Foundation of China(41130313) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Almaz Petrology and Lakehead University ; Almaz Petrology and Lakehead University ; Natural Science Foundation of China(41130313) ; Natural Science Foundation of China(41130313) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Almaz Petrology and Lakehead University ; Almaz Petrology and Lakehead University
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53046]
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	Wu, Fu-Yuan
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China 2.Lakehead Univ, Dept Geol, Thunder Bay, ON P7B 5E1, Canada
推荐引用方式 GB/T 7714	Wu, Fu-Yuan,Mitchell, Roger H.,Li, Qiu-Li,et al. Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada[J]. GEOLOGICAL MAGAZINE,2017,154(2):217-236.
APA	Wu, Fu-Yuan,Mitchell, Roger H.,Li, Qiu-Li,Zhang, Chang,&Yang, Yue-Heng.(2017).Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada.GEOLOGICAL MAGAZINE,154(2),217-236.
MLA	Wu, Fu-Yuan,et al."Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada".GEOLOGICAL MAGAZINE 154.2(2017):217-236.