Oxygen isotopes in HED meteorites and their constraints on parent asteroids
文献类型:期刊论文
作者 | Zhang, Chuantong1,2; Miao, Bingkui1,2; He, Huaiyu3 |
刊名 | PLANETARY AND SPACE SCIENCE |
出版日期 | 2019-04-01 |
卷号 | 168页码:83-94 |
ISSN号 | 0032-0633 |
关键词 | HED meteorites Vesta Oxygen isotopes Parent asteroids |
DOI | 10.1016/j.pss.2019.02.007 |
英文摘要 | The howardite, eucrite and diogenite (HED) clan of meteorites are usually regarded as Vesta meteorites, but there is still serious controversy over whether Vesta is the only parent body for HEDs. Different numbers of HED parent asteroids have been proposed in previous studies of oxygen isotopes. The main controversy is whether the anomalous oxygen isotopic compositions in some HEDs are caused by factors such as terrestrial weathering, addition of exogenous material during brecciation, or a possible primary isotopic heterogeneity of Vesta. To readdress the questions of whether all HED meteorites are from the same parent body, or to constrain the possible number of multiple parent asteroids, the oxygen isotopic data of 166 HED meteorites from the literature are compiled and reviewed here. Among them, 146 HED meteorites have similar Delta O-17 values of -0.240 +/- 0.020 parts per thousand (2 sigma), and the remaining 20 meteorites show oxygen isotopic anomalies (Delta O-17 values fall outside 3 sigma from the above mean). Fifteen HED meteorites have anomalous oxygen isotope compositions that cannot be accounted for by terrestrial weathering or the addition of exogenous material, while the oxygen isotope anomalies in the remaining 5 HEDs are caused by the above factors. Based on studies of a number of isotopic and trace element systems, HED meteorites should form from a magma ocean, thus their parent asteroid is highly likely to be homogeneous. This implies that the oxygen isotope variability of HEDs suggest multiple parent bodies for these meteorites, which is supported by arguments from astrophysical and other geochemical studies such as Zn and Cr. In summary, according to the Delta O-17 values and a number of other observations, we believe that HED meteorites most likely originate from at least 6 different basaltic asteroids. |
WOS关键词 | UNDERSTANDING DELTA-O-17 VARIATIONS ; RAY EXPOSURE AGE ; V-TYPE ASTEROIDS ; EXCIMER-LASER ; BASALTIC ACHONDRITE ; TERRESTRIAL ROCKS ; THERMAL EVOLUTION ; ANOMALOUS EUCRITE ; EARTH MANTLE ; NOBLE-GASES |
资助项目 | National Natural Science Foundation of China[41776196] ; National Natural Science Foundation of China[41173077] ; National Science and Technology Infrastructure Platform Project[2005DKA21406] ; Innovation Project of Guangxi Graduate Education[YCBZ2017054] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
WOS记录号 | WOS:000463309700008 |
资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Infrastructure Platform Project ; National Science and Technology Infrastructure Platform Project ; Innovation Project of Guangxi Graduate Education ; Innovation Project of Guangxi Graduate Education ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Infrastructure Platform Project ; National Science and Technology Infrastructure Platform Project ; Innovation Project of Guangxi Graduate Education ; Innovation Project of Guangxi Graduate Education ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Infrastructure Platform Project ; National Science and Technology Infrastructure Platform Project ; Innovation Project of Guangxi Graduate Education ; Innovation Project of Guangxi Graduate Education ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Infrastructure Platform Project ; National Science and Technology Infrastructure Platform Project ; Innovation Project of Guangxi Graduate Education ; Innovation Project of Guangxi Graduate Education |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/91317] |
专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
通讯作者 | Miao, Bingkui |
作者单位 | 1.Guilin Univ Technol, Inst Meteorites & Planetary Mat Res, Guilin 541006, Peoples R China 2.Guilin Univ Technol, Key Lab Planetary Geol Evolut, Guilin 541006, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Chuantong,Miao, Bingkui,He, Huaiyu. Oxygen isotopes in HED meteorites and their constraints on parent asteroids[J]. PLANETARY AND SPACE SCIENCE,2019,168:83-94. |
APA | Zhang, Chuantong,Miao, Bingkui,&He, Huaiyu.(2019).Oxygen isotopes in HED meteorites and their constraints on parent asteroids.PLANETARY AND SPACE SCIENCE,168,83-94. |
MLA | Zhang, Chuantong,et al."Oxygen isotopes in HED meteorites and their constraints on parent asteroids".PLANETARY AND SPACE SCIENCE 168(2019):83-94. |
入库方式: OAI收割
来源:地质与地球物理研究所
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