Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1945-5100.2002.tb00859.x |
Sayh al Uhaymir 094: A new martian meteorite from the Oman desert | |
Gnos, E; Hofmann, B; Franchi, IA; Al-Kathiri, A; Hauser, M; Moser, L | |
通讯作者 | Gnos, E |
来源期刊 | METEORITICS & PLANETARY SCIENCE
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ISSN | 1086-9379 |
EISSN | 1945-5100 |
出版年 | 2002 |
卷号 | 37期号:6页码:835-854 |
英文摘要 | Sayh al Uhaymir (SaU) 094 is a 223.3 g, partially crusted, strongly to very strongly shocked melanocratic olivine-porphyric rock of the shergottite group showing a microgabbroic texture. The rock consists of pyroxene (52.0-58.2 vol%)-dominantly prismatic pigeonite (En(60-68)Fs(20-27)Wo(7-9)) associated with minor augite (En(46-49)Fs(15-16)Wo(28-31))-brown (shock-oxidized) olivine (Fo(65-69); 22.1-31%), completely isotropic interstitial plagioclase glass (maskelynite; An(50-64)Or(0.3-0.9); 8.6-13.0%), chromite and titanian magnesian chromite (0.9-1.0%), traces of ilmenite (Ilm(80-86)), pyrrhotite (Fe92-100; 0.1-0.2%), merrillite (<<0.1%), and pockets (4.8-6.7%) consisting of green basaltic to basaltic andesitic shock glass that is partially devitrified into a brown to black product along boundaries with the primary minerals. The average maximum dimensions of minerals are: olivine (1.5 mm), pyroxene (0.3 mm) and maskelynite (0.3 mm). Primary melt inclusions in olivine and chromite are common and account for 0.1-0.6% of the rock. X-ray tomography revealed that the specimen contains similar to0.4 vol% of shock-melt associated vesicles, up to 3 mm in size, which show a preferred orientation. Fluidization of the maskelynite, melting and re crystallization of pyroxene, olivine and pyrrhotite indicate shock stage S6. Minor terrestrial weathering resulted in calcite-veining and minor oxidation of sulfides. The meteorite is interpreted as paired with SaU 005/008/051. The modal composition is similar to Dar al Gani 476/489/670/735/876, with the exception that neither mesostasis nor titanomagnetite nor apatite are present and that all phases show little zonation. The restricted mineral composition, predominance of chromite among the oxides, and abundance of olivine indicate affinities to the lherzolitic shergottites. |
类型 | Article |
语种 | 英语 |
国家 | Switzerland ; England ; Oman |
收录类别 | SCI-E |
WOS记录号 | WOS:000176420100005 |
WOS关键词 | CHEMISTRY ; PETROGRAPHY ; MINERALOGY ; LEW88516 ; OXYGEN ; MARS ; DAR-AL-GANI-489 ; PETROGENESIS ; SHERGOTTITES ; PYRRHOTITE |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/143382 |
作者单位 | (1)Inst Geol Sci, CH-3012 Bern, Switzerland;(2)Nat Hist Museum Bern, CH-3005 Bern, Switzerland;(3)Open Univ, Planetary Sci Res Inst, Milton Keynes MK7 6AA, Bucks, England;(4)Minist Commerce & Ind, Directorate Gen Minerals, Salalah, Oman |
推荐引用方式 GB/T 7714 | Gnos, E,Hofmann, B,Franchi, IA,et al. Sayh al Uhaymir 094: A new martian meteorite from the Oman desert[J],2002,37(6):835-854. |
APA | Gnos, E,Hofmann, B,Franchi, IA,Al-Kathiri, A,Hauser, M,&Moser, L.(2002).Sayh al Uhaymir 094: A new martian meteorite from the Oman desert.METEORITICS & PLANETARY SCIENCE,37(6),835-854. |
MLA | Gnos, E,et al."Sayh al Uhaymir 094: A new martian meteorite from the Oman desert".METEORITICS & PLANETARY SCIENCE 37.6(2002):835-854. |
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