Records of the Moon-forming impact and the 470 Ma disruption of the L chondrite parent body in the asteroid belt from U-Pb apatite ages of Novato (L6)

doi:10.1111/maps.12340

	Records of the Moon-forming impact and the 470 Ma disruption of the L chondrite parent body in the asteroid belt from U-Pb apatite ages of Novato (L6)
	Yin, Qing-Zhu 1; Zhou, Qin 2; Li, Qiu-Li 3; Li, Xian-Hua 3; Liu, Yu 3; Tang, Guo-Qiang 3; Krot, Alexander N.4; Jenniskens, Peter 5,6
刊名	METEORITICS & PLANETARY SCIENCE
	2014-08-01
卷号	49 期号:8 页码:1426-1439
ISSN号	1086-9379
DOI	10.1111/maps.12340
文献子类	Article
英文摘要	Novato, a newly observed fall in the San Francisco Bay area, is a shocked and brecciated L6 ordinary chondrite containing dark and light lithologies. We have investigated the U-Pb isotope systematics of coarse Cl-apatite grains of metamorphic origin in Novato with a large geometry ion microprobe. The U-Pb systematics of Novato apatite reveals an upper intercept age of 4472 +/- 31 Ma and lower intercept age of 473 +/- 38 Ma. The upper intercept age is within error identical to the U-Pb apatite age of 4452 +/- 21 Ma measured in the Chelyabinsk LL5 chondrite. This age is interpreted to reflect a massive collisional resetting event due to a large impact associated with the peak arrival time at the primordial asteroid belt of ejecta debris from the Moon-forming giant impact on Earth. The lower intercept age is consistent with the most precisely dated Ar-Ar ages of 470 +/- 6 Ma of shocked L chondrites, and the fossil meteorites and extraterrestrial chromite relicts found in Ordovician limestones with an age of 467.3 +/- 1.6 Ma in Sweden and China. The lower intercept age reflects a major disturbance related to the catastrophic disruption of the L chondrite parent body most likely associated with the Gefion asteroid family, which produced an initially intense meteorite bombardment of the Earth in Ordovician period and reset and degassed at least approximately 35% of the L chondrite falls today. We predict that the 470 Ma impact event is likely to be found on the Moon and Mars, if not Mercury.
WOS关键词	ORDOVICIAN BIODIVERSIFICATION ; FOSSIL METEORITES ; SHOCK ; CHROMITE ; OXYGEN ; ORIGIN ; EARTH ; METAMORPHISM ; AR-40-AR-39 ; SYSTEMATICS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000340875900008
资助机构	NSFC grants(41222023 ; NSFC grants(41222023 ; 41221002) ; 41221002) ; NSFC grants(41222023 ; NSFC grants(41222023 ; 41221002) ; 41221002) ; NSFC grants(41222023 ; NSFC grants(41222023 ; 41221002) ; 41221002) ; NSFC grants(41222023 ; NSFC grants(41222023 ; 41221002) ; 41221002)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85312]
专题	中国科学院地质与地球物理研究所
通讯作者	Yin, Qing-Zhu
作者单位	1.Univ Calif Davis, Dept Earth & Planetary Sci, Davis, CA 95616 USA 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Univ Hawaii Manoa, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA 5.SETI Inst, Mountain View, CA 94043 USA 6.NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
推荐引用方式 GB/T 7714	Yin, Qing-Zhu,Zhou, Qin,Li, Qiu-Li,et al. Records of the Moon-forming impact and the 470 Ma disruption of the L chondrite parent body in the asteroid belt from U-Pb apatite ages of Novato (L6)[J]. METEORITICS & PLANETARY SCIENCE,2014,49(8):1426-1439.
APA	Yin, Qing-Zhu.,Zhou, Qin.,Li, Qiu-Li.,Li, Xian-Hua.,Liu, Yu.,...&Jenniskens, Peter.(2014).Records of the Moon-forming impact and the 470 Ma disruption of the L chondrite parent body in the asteroid belt from U-Pb apatite ages of Novato (L6).METEORITICS & PLANETARY SCIENCE,49(8),1426-1439.
MLA	Yin, Qing-Zhu,et al."Records of the Moon-forming impact and the 470 Ma disruption of the L chondrite parent body in the asteroid belt from U-Pb apatite ages of Novato (L6)".METEORITICS & PLANETARY SCIENCE 49.8(2014):1426-1439.