SHRIMP U-Pb zircon geochronology and geochemistry of metavolcanic and metasedimentary rocks in Northwestern Fujian, Cathaysia block, China  Tectonic implications and the need to redefine lithostratigraphic units

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	SHRIMP U-Pb zircon geochronology and geochemistry of metavolcanic and metasedimentary rocks in Northwestern Fujian, Cathaysia block, China Tectonic implications and the need to redefine lithostratigraphic units
	Wan, YS (Wan, Yusheng); Liu, DY (Liu, Dunyi); Xu, MH (Xu, Meihui); Zhuang, JM (Zhuang, Jianmin); Song, B (Song, Biao); Shi, YR (Shi, Yuruo); Du, LL (Du, Lilin)
刊名	GONDWANA RESEARCH
	2007
卷号	12 期号:1-2 页码:166-183
关键词	Proterozoic early Palaeozoic Cathaysia Block SHRIMP Nd-isotopes Rodinia South China
ISSN号	1342-937X
英文摘要	Northwestern Fujian Province is one of the most important Pre-Palaeozoic areas in the Cathaysia Block of South China. Metavolcano-sedimentary and metasedimentary rocks of different types, ages and metamorphic grades (granulite to upper greenschist facies) are present, and previously were divided into several Formations and Groups. Tectonic contacts occur between some units, whereas (deformed) unconformities have been reported between others. New SHRIMP U-Pb zircon ages presented here indicate that the original lithostratigraphy and the old "Group" and "Formation" terminology should be abandoned. Thus the "Tianjingping Formation" was not formed in the Archaean or Palaeoproterozoic, as previously considered, but must be younger than its youngest detrital zircons (1790 Ma) but older than regional metamorphism (460 Ma). Besides magmatic zircon ages of 807 Ma obtained from metavolcano-sedimentary rocks of the "Nanshan Formation" and 751-728 Ma for the "Mamianshan Group", many inherited and detrital zircons with ages ranging from 1.0 to 0.8 Ga were also found in them. These ages indicate that the geological evolution of the study area may be related to the assembly and subsequent break-up of the Rodinia supercontinent. The new zircon results poorly constrain the age of the "Mayuan Group" as Neoproterozoic to early Palaeozoic (728-458 Ma), and not Palaeoproterozoic as previously thought. Many older inherited and detrital zircons with ages of 3.6, 2.8, 2.7, 2.6-2.5, 2.0-1.8 and 1.6 Ga were found in this study. A 3.6 Ga detrital grain is the oldest one so far identified in northwestern Fujian Province as well as throughout the Cathaysia Block. Nd isotope t(DM) values of eight volcano-sedimentary and clastic sedimentary rock samples centre on 2.73-1.68 Ga, being much older than the formation ages of their protoliths and thus showing that the recycling of older crust played an important role in their formation. These rocks underwent high grade metamorphism in the early Palaeozoic (458-425 Ma) during an important tectono-thermal event in the Cathaysia Block. (c) 2006 Published by Elsevier B.V. on behalf of International Association for Gondwana Research.
学科主题	地质年代学
WOS关键词	SOUTH CHINA ; SM-ND ; MESOPROTEROZOIC SUPERCONTINENT ; SOUTHEASTERN CHINA ; SINGLE ZIRCON ; EVOLUTION ; RODINIA ; MAGMATISM ; MANTLE ; CONFIGURATION
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000248283100013
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38484]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China Fujian Inst Geol Survey, Fujian 365001, Peoples R China
推荐引用方式 GB/T 7714	Wan, YS ,Liu, DY ,Xu, MH ,et al. SHRIMP U-Pb zircon geochronology and geochemistry of metavolcanic and metasedimentary rocks in Northwestern Fujian, Cathaysia block, China Tectonic implications and the need to redefine lithostratigraphic units[J]. GONDWANA RESEARCH,2007,12(1-2):166-183.
APA	Wan, YS .,Liu, DY .,Xu, MH .,Zhuang, JM .,Song, B .,...&Du, LL .(2007).SHRIMP U-Pb zircon geochronology and geochemistry of metavolcanic and metasedimentary rocks in Northwestern Fujian, Cathaysia block, China Tectonic implications and the need to redefine lithostratigraphic units.GONDWANA RESEARCH,12(1-2),166-183.
MLA	Wan, YS ,et al."SHRIMP U-Pb zircon geochronology and geochemistry of metavolcanic and metasedimentary rocks in Northwestern Fujian, Cathaysia block, China Tectonic implications and the need to redefine lithostratigraphic units".GONDWANA RESEARCH 12.1-2(2007):166-183.