Cretaceous Exhumation of Proterozoic Carbonatite on the Northern Margin of the North China Craton Constrained by Apatite Fission-Track and (U-Th)/He Geochronology

doi:10.1086/693094

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

	Cretaceous Exhumation of Proterozoic Carbonatite on the Northern Margin of the North China Craton Constrained by Apatite Fission-Track and (U-Th)/He Geochronology
	Wu, Lin 1; Liu, Yan 2; Wang, Fei 1,3; Zeng, Liang 4; Yang, Liekun 1; Tian, Yuntao 5; Zhang, Weibin 1
刊名	JOURNAL OF GEOLOGY
	2017-09-01
卷号	125 期号:5 页码:593-606
ISSN号	0022-1376
DOI	10.1086/693094
文献子类	Article
英文摘要	Some carbonatites related to Proterozoic rift activities developed on the northern margin of the North China Craton and have a close genetic relationship with certain types of mineralization. We obtained new fission-track and (U-Th)/He geochronological data from fragments of pegmatitic apatite that coexists with Proterozoic igneous carbonatite along the border of three provinces (Hebei, Shanxi, and Inner Mongolia). Twenty fragments yielded a fission-track central age of 124.1 +/- 6.5 Ma (1 sigma). Thermal-history inversion and track-length distribution suggest rapid Early Cretaceous cooling through the apatite partial-annealing zone. Sixteen single-fragment apatite (U-Th)/He ages range between 82.2 +/- 1.8 and 109.6 +/- 2.3 Ma, with the age variation much larger than the analytical uncertainty. Several reasons could account for this dispersion. While alpha-particle redistribution resulted from U and Th inhomogeneties, chemical variations and radiation damage are the most probable causes. We calculated the mean age, central age, and isochron age of all the analyzed fragments and got a consistent statistical age of approximate to 100 Ma, which can be used as the best estimation of the cooling age for the pegmatitic apatite. This result also suggests that the Proterozoic carbonatite was exhumed to a subsurface level during the late Early Cretaceous and was not buried deeper than 2-3 km since then, a situation that provided favorable conditions for the preservation of some ore deposits. The denudation of the Proterozoic rocks was consistent with widespread crustal extension, represented by formation of metamorphic core complexes and rift basins, reactivation of normal faults, and rapid exhumation of granites on the eastern Asian continent. These new low-temperature geological data shed some light on the denudation and preservation of related mineral deposits.
WOS关键词	METAMORPHIC CORE COMPLEX ; ZIRCON U-PB ; MESOZOIC EXTENSIONAL TECTONICS ; LOW-TEMPERATURE THERMOCHRONOMETRY ; ALKALINE-RICH INTRUSIONS ; DALUCAO REE DEPOSIT ; SINO-KOREAN CRATON ; BOHAI BAY BASIN ; INNER-MONGOLIA ; HELIUM DIFFUSION
WOS研究方向	Geology
语种	英语
出版者	UNIV CHICAGO PRESS
WOS记录号	WOS:000408364800007
资助机构	National Natural Science Foundation of China (NSFC)(41503055 ; National Natural Science Foundation of China (NSFC)(41503055 ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; 41521062) ; 41521062) ; National Natural Science Foundation of China (NSFC)(41503055 ; National Natural Science Foundation of China (NSFC)(41503055 ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; 41521062) ; 41521062) ; National Natural Science Foundation of China (NSFC)(41503055 ; National Natural Science Foundation of China (NSFC)(41503055 ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; 41521062) ; 41521062) ; National Natural Science Foundation of China (NSFC)(41503055 ; National Natural Science Foundation of China (NSFC)(41503055 ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; Ministry of Science and Technology of the People's Republic of China(2016 YFC0600109) ; 41521062) ; 41521062)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/61917]
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, Lin
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 5.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Wu, Lin,Liu, Yan,Wang, Fei,et al. Cretaceous Exhumation of Proterozoic Carbonatite on the Northern Margin of the North China Craton Constrained by Apatite Fission-Track and (U-Th)/He Geochronology[J]. JOURNAL OF GEOLOGY,2017,125(5):593-606.
APA	Wu, Lin.,Liu, Yan.,Wang, Fei.,Zeng, Liang.,Yang, Liekun.,...&Zhang, Weibin.(2017).Cretaceous Exhumation of Proterozoic Carbonatite on the Northern Margin of the North China Craton Constrained by Apatite Fission-Track and (U-Th)/He Geochronology.JOURNAL OF GEOLOGY,125(5),593-606.
MLA	Wu, Lin,et al."Cretaceous Exhumation of Proterozoic Carbonatite on the Northern Margin of the North China Craton Constrained by Apatite Fission-Track and (U-Th)/He Geochronology".JOURNAL OF GEOLOGY 125.5(2017):593-606.