Identification and zircon U-Pb geochronology of the Yingchengzi Paleoarchean gneiss complex, Anshan area

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

	Identification and zircon U-Pb geochronology of the Yingchengzi Paleoarchean gneiss complex, Anshan area
	Zhang JiaHui 1; Jin Wei 1; Zheng PeiXi 1; Wang YaFei 2; Li Bin 1; Cai LiBin 1; Wang QingLong 1
刊名	ACTA PETROLOGICA SINICA
	2013-02-01
卷号	29 期号:2 页码:399-413
关键词	Paleoarchean Zircon U-pb Dating Gneiss Complex Migmatite Anshan
文献子类	Article
英文摘要	Eoarchean-Neoarchean granitite complexes are widely distributed in the Anshan area, which is a classical place for studying early crustal material composition and evolution. We newly identified a suit of the Yingchengzi gneiss complex and trondhjemite assemblages through large-scale field Ethology survey work. This provides new evidences and clues for comparing regional ancient rock series, recovering the tectonic structures and revealing the Archean crustal formation and evolution in the Anshan area. The gneiss complex mainly consists of stromatic biotite plagioclase gneiss, vein trondhjemitic gneiss and biotite schist, which occur as xenolithes in different sizes in the trondhjemite with fine texture and homogenous massive structure. The rock assemblage, complicated and heterogeneous rock fabric of the gneiss complex show characteristics of an anatectic migmatite. SIMS zircon U-Pb dating results indicate that the stromatic biotite plagioclase gneiss and biotite schist have the ages of 3312 +/- 14Ma, 3304 +/- 7Ma and 3324 +/- 7Ma similar to 3235 +/- 14Ma respectively, indicating an Paleoarchean thermal event. In addition, several samples contain inherited zircons with ages of 3.68 similar to 3.60Ga and similar to 3.47Ga age. The fine grained biotite trondhjemite formed 3.14 similar to 3.13Ga, which is consistent with the regional Mesoarchean magmatic events. Regional comparative study reveals that the rock assemblage, occurrence relationship and chronological characteristics of the Yingchengzi gneiss complex are similar with the Dongshan complex and Shengouzi complex, all of which were the products of the Paleoarchean (3.33 similar to 3.24Ga) anatexis. The Yingchengzi gneiss complex in the Anshan area is another geologic body which preserved information of ancient zircons and Early Archean crustal rocks.
WOS关键词	NORTH CHINA CRATON ; ISOTOPIC CONSTRAINTS ; CRUSTAL EVOLUTION ; LIAONING PROVINCE ; OLDEST ROCKS ; HF ; SHRIMP ; AGE ; GREENLAND ; GRANITE
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000317531300005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62648]
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.Jilin Univ, Coll Earth Sci, Changchun 130021, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang JiaHui,Jin Wei,Zheng PeiXi,et al. Identification and zircon U-Pb geochronology of the Yingchengzi Paleoarchean gneiss complex, Anshan area[J]. ACTA PETROLOGICA SINICA,2013,29(2):399-413.
APA	Zhang JiaHui.,Jin Wei.,Zheng PeiXi.,Wang YaFei.,Li Bin.,...&Wang QingLong.(2013).Identification and zircon U-Pb geochronology of the Yingchengzi Paleoarchean gneiss complex, Anshan area.ACTA PETROLOGICA SINICA,29(2),399-413.
MLA	Zhang JiaHui,et al."Identification and zircon U-Pb geochronology of the Yingchengzi Paleoarchean gneiss complex, Anshan area".ACTA PETROLOGICA SINICA 29.2(2013):399-413.