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The Creston, California, meteorite fall and the origin of L chondrites

文献类型：期刊论文

作者Jenniskens, Peter10,11; Utas, Jason12; Yin, Qing-Zhu13; Matson, Robert D.1; Fries, Marc14; Howell, J. Andreas15; Free, Dwayne15; Albers, Jim10; Devillepoix, Hadrien16; Bland, Phil16
刊名METEORITICS & PLANETARY SCIENCE
出版日期2019-04-01
卷号54期号:4页码:699-720
ISSN号1086-9379
DOI10.1111/maps.13235
英文摘要It has been proposed that all L chondrites resulted from an ongoing collisional cascade of fragments that originated from the formation of the similar to 500 Ma old asteroid family Gefion, located near the 5:2 mean-motion resonance with Jupiter in the middle Main Belt. If so, L chondrite pre-atmospheric orbits should be distributed as expected for that source region. Here, we present contradictory results from the orbit and collisional history of the October 24, 2015, L6 ordinary chondrite fall at Creston, CA (here reclassified to L5/6). Creston's short 1.30 +/- 0.02 AU semimajor axis orbit would imply a long dynamical evolution if it originated from the middle Main Belt. Indeed, Creston has a high cosmic ray exposure age of 40-50 Ma. However, Creston's small meteoroid size and low 4.23 +/- 0.07 degrees inclination indicate a short dynamical lifetime against collisions. This suggests, instead, that Creston originated most likely in the inner asteroid belt and was delivered via the nu(6) resonance. The U-Pb systematics of Creston apatite reveals a Pb-Pb age of 4,497.1 +/- 3.7 Ma, and an upper intercept U-Pb age of 4,496.7 +/- 5.8 Ma (2 sigma), circa 70 Ma after formation of CAI, as found for other L chondrites. The K-Ar (age similar to 4.3 Ga) and U,Th-He (age similar to 1 Ga) chronometers were not reset at similar to 500 Ma, while the lower intercept U-Pb age is poorly defined as 770 +/- 320 Ma. So far, the three known L chondrites that impacted on orbits with semimajor axes a AU all have high (>3 Ga) K-Ar ages. This argues for a source of some of our L chondrites in the inner Main Belt. Not all L chondrites originate in a continuous population of Gefion family debris stretching across the 3:1 mean-motion resonance.
WOS关键词MOON-FORMING IMPACT ; RAY EXPOSURE AGES ; ASTEROIDAL SOURCE ; MA DISRUPTION ; NOBLE-GASES ; PARENT BODY ; PB AGE ; RECOVERY ; HISTORY ; SOLAR
资助项目NASA Ames Asteroid Threat Assessment Program ; NASA[NNX14-AR92G] ; NASA[NNX14-AM62G] ; NASA[NNX16-AD34G] ; NSFC[41403055] ; Swiss National Science Foundation ; Academy of Finland[299543]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者WILEY
WOS记录号WOS:000462911900002
资助机构NASA Ames Asteroid Threat Assessment Program ; NASA Ames Asteroid Threat Assessment Program ; NASA ; NASA ; NSFC ; NSFC ; Swiss National Science Foundation ; Swiss National Science Foundation ; Academy of Finland ; Academy of Finland ; NASA Ames Asteroid Threat Assessment Program ; NASA Ames Asteroid Threat Assessment Program ; NASA ; NASA ; NSFC ; NSFC ; Swiss National Science Foundation ; Swiss National Science Foundation ; Academy of Finland ; Academy of Finland ; NASA Ames Asteroid Threat Assessment Program ; NASA Ames Asteroid Threat Assessment Program ; NASA ; NASA ; NSFC ; NSFC ; Swiss National Science Foundation ; Swiss National Science Foundation ; Academy of Finland ; Academy of Finland ; NASA Ames Asteroid Threat Assessment Program ; NASA Ames Asteroid Threat Assessment Program ; NASA ; NASA ; NSFC ; NSFC ; Swiss National Science Foundation ; Swiss National Science Foundation ; Academy of Finland ; Academy of Finland
源URL[http://ir.bao.ac.cn/handle/114a11/25636]  
专题中国科学院国家天文台
通讯作者Jenniskens, Peter
作者单位1.Leidos, Seal Beach, CA 90740 USA
2.Ist Naz Fiscia Nucl, Lab Naz Gran Sasso, I-67100 Assergi, AQ, Italy
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
5.Purdue Univ, PRIME Lab, W Lafayette, IN 47907 USA
6.Swiss Fed Inst Technol, Inst Geochem & Petr, CH-8092 Zurich, Switzerland
7.Univ Helsinki, Dept Phys, FI-00014 Helsinki, Finland
8.Lulea Univ Technol, Div Space Technol, S-98128 Kiruna, Sweden
9.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
10.Carl Sagan Ctr, SETI Inst, Mountain View, CA 94043 USA
推荐引用方式
GB/T 7714		 Jenniskens, Peter,Utas, Jason,Yin, Qing-Zhu,et al. The Creston, California, meteorite fall and the origin of L chondrites[J]. METEORITICS & PLANETARY SCIENCE,2019,54(4):699-720.
APA Jenniskens, Peter.,Utas, Jason.,Yin, Qing-Zhu.,Matson, Robert D..,Fries, Marc.,...&Granvik, Mikael.(2019).The Creston, California, meteorite fall and the origin of L chondrites.METEORITICS & PLANETARY SCIENCE,54(4),699-720.
MLA Jenniskens, Peter,et al."The Creston, California, meteorite fall and the origin of L chondrites".METEORITICS & PLANETARY SCIENCE 54.4(2019):699-720.

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