Origin of Late Palaeozoic bauxites in the North China Craton: constraints from zircon U-Pb geochronology and in situ Hf isotopes

doi:10.1144/jgs2013-074

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院地质力学研究所

	Origin of Late Palaeozoic bauxites in the North China Craton: constraints from zircon U-Pb geochronology and in situ Hf isotopes
	Liu, Jian 1; Zhao, Yue ; Liu, Ankun ; Zhang, Shuanhong ; Yang, Zhenyu 1; Zhuo, Shengguang 2
刊名	JOURNAL OF THE GEOLOGICAL SOCIETY
	2014
卷号	171 期号:5 页码:695-707
ISSN号	0016-7649
DOI	10.1144/jgs2013-074
英文摘要	Bauxite deposits that lie between Middle Ordovician limestones and Late Carboniferous clastic sediments (known as the 'G' layer bauxites) are widespread throughout the northern part of the North China Craton. The origin of these bauxites has remained uncertain and has been attributed either to alteration of the underlying limestone or to tephra deposited on the limestone erosional surface. We use U-Pb ages and in situ Hf isotopic analyses of detrital zircons from the 'G' layer bauxite deposits (both by laser ablation inductively coupled plasma mass spectrometry) to constrain the major source materials of the bauxites. The zircon ages are dominated by Palaeozoic ages, especially Carboniferous to Early Permian (338-291 Ma), coeval with the Palaeozoic subduction-related volcanism in the Inner Mongolia Palaeo-Uplift on the northern margin of the North China Craton. Zircon e Hf (t) values range from 2.2 to -24.5 and are dominated by negative values, similar to those of Palaeozoic magmatic rocks in the Inner Mongolia Palaeo-Uplift, but distinct from those of Palaeozoic magmatic rocks in the Central Asian Orogenic Belt with positive epsilon(Hf) (t) values. Thus, we argue that the bauxites were derived mainly from volcanic dust produced during the Palaeozoic, particularly in the Carboniferous to Early Permian (338-291 Ma), by volcanism in the Inner Mongolia Palaeo-Uplift along the northern margin of the North China Craton, rather than in the Central Asian Orogenic Belt to the north. The underlying Middle Ordovician limestones, however, had provided only minor, if any, source materials for the bauxites.
学科主题	矿床地质
WOS关键词	DETRITAL ZIRCONS ; INNER-MONGOLIA ; LU-HF ; TECTONIC IMPLICATIONS ; SOLONKER SUTURE ; CLIMATE-CHANGE ; ASIAN OCEAN ; THRUST BELT ; MARGIN ; EVOLUTION
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC PUBL HOUSE
WOS记录号	WOS:000341822100009
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/41047]
专题	中国地质科学院地质力学研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 2.Chinese Acad Geol Sci, Key Lab Paleomagnetism, Beijing 100081, Peoples R China 3.Northeastern Univ Qinhuangdao, Inst Earth Sci & Informat Technol, Qinhuangdao 066100, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jian,Zhao, Yue,Liu, Ankun,et al. Origin of Late Palaeozoic bauxites in the North China Craton: constraints from zircon U-Pb geochronology and in situ Hf isotopes[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2014,171(5):695-707.
APA	Liu, Jian,Zhao, Yue,Liu, Ankun,Zhang, Shuanhong,Yang, Zhenyu,&Zhuo, Shengguang.(2014).Origin of Late Palaeozoic bauxites in the North China Craton: constraints from zircon U-Pb geochronology and in situ Hf isotopes.JOURNAL OF THE GEOLOGICAL SOCIETY,171(5),695-707.
MLA	Liu, Jian,et al."Origin of Late Palaeozoic bauxites in the North China Craton: constraints from zircon U-Pb geochronology and in situ Hf isotopes".JOURNAL OF THE GEOLOGICAL SOCIETY 171.5(2014):695-707.