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Dhofar 2092 | |||||||||||||||||||||||||||||
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Basic information | Name: Dhofar 2092 This is an OFFICIAL meteorite name. Abbreviation: Dho 2092 Observed fall: No Year found: 2015 Country: Oman Mass: 440 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 595 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 8 Jan 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Dhofar 2092 (Dho 2092) 18°45.30’N, 54°31.15’E Zufar, Oman Find: 15 Feb 2015 Classification: HED achondrite (Eucrite) Physical characteristics: A 440 g sample supplied by the Sultan Qaboos University, which has a millimeter thick, dark brown fusion crust present on all faces except one cut face. This fusion crust lacks remaglypts instead has a mainly rough surface and angular. There are no contraction cracks present on this sample. This rock has already been cut and there is a clean face already present. Beige colour clasts can be identified on cut face and they are surrounded by a light grey ground mass. The sample is not magnetic. Petrography (P. Hill, UWO) The sample is breccia containing numerous clasts of coarse-grained plagioclase and pyroxene. The clasts are poorly sorted and are sub-rounded with one clast reaching up to 2 cm on the cut face. Pyroxene (low and high Ca) and plagioclase make up most of the clasts and the groundmass; however, and free silica was observed in significant quantities. The free silica mainly located at grain boundaries within the fine-grained groundmass. Distinct exsolution lamellae are present within the grains of pyroxene. Troilite and oxides are present within the sample and through EDS analysis the oxides were determined to be ilmenite. No weathering products were observed within the samples suggest a low degree of terrestrial weathering. The sample does show undulose extinction in some of the grains of plagioclase and irregular fractures were observed, but not in high abundance suggesting that the sample is very weakly shocked. Geochemistry: Mineral composition and geochemistry (M. Beauchamp, P. Hill, UWO) Plagioclase (An88.4±0.9), Low-Ca Pyroxene (Fs59.8±2.5Wo3.0±2.4), High-Ca Pyroxene (Fs27.36±2.1Wo42.5±2.3) and Free Silica (SiO2 99.3 ±1.3 wt%) Classification: Classificaiton: Eucrite S2, W1. Specimens: 440 g type specimen, including polished thin section, are on deposit at SQU. | ||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015) SQU: Sultan Qaboos University, College of Science, Earth Sciences Department, P.O. Box 36 Code 123 AlKhoud, Oman (institutional address; updated 5 Oct 2014) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 2169 approved meteorites from Zufar, Oman (plus 24 unapproved names) This is 1 of 4006 approved meteorites from Oman (plus 433 unapproved names) | ||||||||||||||||||||||||||||
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Revision history: |
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