Arid
DOI10.1111/j.1945-5100.2006.tb00998.x
Shisr 043 (IIIAB medium octahedrite): The first iron meteorite from the Oman desert
Al-Kathiri, A.; Hofmann, B. A.; Gnos, E.; Eugster, O.; Welten, K. C.; Kraehenbuehl, U.
通讯作者Al-Kathiri, A.
来源期刊METEORITICS & PLANETARY SCIENCE
ISSN1086-9379
EISSN1945-5100
出版年2006
卷号41期号:8页码:A217-A230
英文摘要

The iron meteorite Shisr 043 is a single mass of 8267 g found in the south Oman desert 42 kin NE of the Shisr village. It is the first iron identified among the >1400 individual meteorites reported from Oman. The meteorite is a slightly elongated mass showing only minor rusting, a partially smooth and partially rough surface with octahedral cleavage, and a partially preserved metallic fusion crust typically 0.75 mm thick.


The undeformed Widmanstatten pattern with a mean kamacite bandwidth of 1.0 +/- 0.1 mm (n = 97) indicates structural classification as a medium octahedrite. From the bulk composition, Ni = 8.06 wt%, Ga = 18.8 ppm, Ge = 37.25 ppm, and Ir = 3.92 ppm, the meteorite is classified as IIIAB, the most common group of iron meteorites. The cosmic-ray exposure (CRE) age based on He-3, Ne-21, Ar-38 concentrations and Be-10-Ne-21, Al-26-Ne-21, and Cl-36-Ar-36 ratios is 290 +/- 20 Ma. This age falls within the range observed for type IIIAB iron meteorites, but does not coincide with the main cluster. The cosmogenic noble gas and radionuclide data indicate that Shisr 043 had a relatively small pre-atmospheric mass. The low degree of weathering is consistent with a young terrestrial age of <10,000 years based on the saturated Ca-41 concentration. Shisr 043 is not paired with any of the other eight known iron meteorites from the Arabian Peninsula.


类型Article
语种英语
国家Switzerland ; Oman ; USA
收录类别SCI-E
WOS记录号WOS:000239172300410
WOS关键词RAY-PRODUCED NUCLIDES ; NOBLE-GASES ; PRODUCTION-RATES ; AMS STANDARDS ; EXPOSURE AGES ; RARE-GASES ; BULLETIN ; ESTHERVILLE ; POTASSIUM ; SEPTEMBER
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
来源机构University of California, Berkeley
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/152488
作者单位(1)Univ Bern, Inst Geol, CH-3012 Bern, Switzerland;(2)Minist Commerce & Ind, Directorate Gen Commerce & Ind, Salalah, Oman;(3)Nat Hist Museum Burgergemeinde Bern, CH-3005 Bern, Switzerland;(4)Univ Bern, Inst Phys, Abt Weltraumforsch & Planetol, CH-3012 Bern, Switzerland;(5)Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA;(6)Univ Bern, Dept Biochem & Chem, CH-3012 Bern, Switzerland
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Al-Kathiri, A.,Hofmann, B. A.,Gnos, E.,et al. Shisr 043 (IIIAB medium octahedrite): The first iron meteorite from the Oman desert[J]. University of California, Berkeley,2006,41(8):A217-A230.
APA Al-Kathiri, A.,Hofmann, B. A.,Gnos, E.,Eugster, O.,Welten, K. C.,&Kraehenbuehl, U..(2006).Shisr 043 (IIIAB medium octahedrite): The first iron meteorite from the Oman desert.METEORITICS & PLANETARY SCIENCE,41(8),A217-A230.
MLA Al-Kathiri, A.,et al."Shisr 043 (IIIAB medium octahedrite): The first iron meteorite from the Oman desert".METEORITICS & PLANETARY SCIENCE 41.8(2006):A217-A230.
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