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	Shrimp u-pb ages of k-bentonite beds in the xiamaling formation: implications for revised subdivision of the meso- to neoproterozoic history of the north china craton
	Su, Wenbo1; Zhang, Shihong1; Huff, Warren D.2; Li, Huaikun3; Ettensohn, Frank R.4; Chen, Xiaoyu5; Yang, Hongmei1; Han, Yigui1; Song, Biao6; Santosh, M.7
刊名	Gondwana research
	2008-10-01
卷号	14期号:3页码:543-553
关键词	Shrimp u-pb geochronology Xiamaling formation North china craton Meso- to neoproterozoic Columbia supercontinent
ISSN号	1342-937X
DOI	10.1016/j.gr.2008.04.007
通讯作者	Su, wenbo(suwenbo@cugb.edu.cn)
英文摘要	We report shrimp u-pb zircon ages from k-bentonite beds from different locations in the xiamaling formation near beijing at the northern margin of the north china craton (ncc). the 1379 +/- 12 ma and 1380 +/- 36 ma ages obtained in ourstudy correlate with similar data (i 368 12 ma) obtained from recent studies and assign a mid-mesoproterozoic (ectasian period) age for the formation. in addition, a detailed bed-by-bed study of the k-bentonite sequence indicates that the present dated successions northwest of beijing can be correlated fairly well with that of the well-known meso- to neoproterozoic standard section in jixian to the east of beijing. the new data call for a major revision of the previous meso- to neoproterozoic chronostratigraphic subdivision of the northern ncc, with a revised calibration into the early to middle mesoproterozoic era. our data suggest that the tawuia-bearing assemblage in the lower part of the xiamaling formation in the ncc could be olderthan similar to 1380 ma, and is not limited to a representative feature of the neoproterozoic little-dal-group-typemacroalgal biota. combined with other similar discoveries, we conclude that the macro-evolution of proterozoic eukaryotic biotas, represented by macroalgal assemblages, would have probably been a long, protracted, and somewhat monotonous process. on the other hand, reassessment of the paleomagnetic database for these successions, combined with stratigraphic correlations and similarities in the macroalgal assemblages on the ncc and laurentia, support a configuration in which the ncc was in close proximity to the laurentia-siberia-baltica grouping during much of the mesoproterozoic to neoproterozoic time. furthermore, our study suggests recent assumptions linking delta(34)s(cas) and delta(13)c(carbonate) fluctuations in the jixian section with the assembly and breakup of rodinia must now be reconsidered, as these fluctuations may correlate better with the tectonics associated with the columbia supercontinent cycle. 0 2008 international association for gondwana research. published by elsevier b.v. all rights reserved.
WOS关键词	MACKENZIE MOUNTAINS ; COLUMBIA SUPERCONTINENT ; TECTONIC IMPLICATIONS ; DOUSHANTUO FORMATION ; NORTHWESTERN CANADA ; PURCELL SUPERGROUP ; ALGAL MEGAFOSSILS ; WESTERN MONTANA ; BELT SUPERGROUP ; EASTERN CHINA
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000258812500019
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2387762
专题	中国科学院大学
通讯作者	Su, Wenbo
作者单位	1.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 2.Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA 3.CGS, Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China 4.Univ Kentucky, Dept Earth & Environm Sci, Lexington, KY 40506 USA 5.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 6.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Inst Geol, Beijing 100037, Peoples R China 7.Kochi Univ, Fac Sci, Kochi 7808520, Japan
推荐引用方式 GB/T 7714	Su, Wenbo,Zhang, Shihong,Huff, Warren D.,et al. Shrimp u-pb ages of k-bentonite beds in the xiamaling formation: implications for revised subdivision of the meso- to neoproterozoic history of the north china craton[J]. Gondwana research,2008,14(3):543-553.
APA	Su, Wenbo.,Zhang, Shihong.,Huff, Warren D..,Li, Huaikun.,Ettensohn, Frank R..,...&Santosh, M..(2008).Shrimp u-pb ages of k-bentonite beds in the xiamaling formation: implications for revised subdivision of the meso- to neoproterozoic history of the north china craton.Gondwana research,14(3),543-553.
MLA	Su, Wenbo,et al."Shrimp u-pb ages of k-bentonite beds in the xiamaling formation: implications for revised subdivision of the meso- to neoproterozoic history of the north china craton".Gondwana research 14.3(2008):543-553.

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