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| Ramlat Fasad 057 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Ramlat Fasad 057 This is an OFFICIAL meteorite name. Abbreviation: RF 057 Observed fall: No Year found: 2016 Country: Oman Mass:  13.1 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 19 Apr 2018 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 107:
Ramlat Fasad 057 19°0.580’N, 53°20.587’E Zufar, Oman Find: 31.01.16 Classification: Martian meteorite (Shergottite) History: A single fragment was found during a search for meteorites. Physical characteristics: Pale/greyish brown to greenish brown, platy fragment, 3x4x0.7 cm, without fusion crust. Wind-ablation on small sides. Petrography: (Felix Mechelke, Bern, B. Hofmann, NMBE) The meteorite consists of pigeonite and augite (together 48 vol%, typical length 0.5-1 mm), olivine (35 vol.%, typical size 0.6 mm) and plagioclase completely transformed to maskelynite (11 vol.%, typical size 0.3x0.7 mm). Accessories (6 vol%) comprise pyrrhotite and spinel. Weathering effects: Minor replacement of silicates by terrestrial calcite along fractures, staining of silicates with iron hydroxides near surface. Geochemistry: (Felix Mechelke, Bern, B. Hofmann, NMBE) Olivine rim compositions are Fa 40.8±3.5 (N = 43). Dark brown, partially altered cores are Fa 35.1±1.9 (N = 21). Pigeonite compositions are Fs 29.8±3.1 (N = 44, range 27.3-43.4), Wo8.8±1.7 (range 6.3-13.6), mean FeO/MnO = 28.0±1.4; augite compositions are Fs 23.1±2.8 (range 20.1-29.2, N = 8) Wo31.0±5.3 (range 20.3-36.4). Maskelynite has An 53.0±1.5 (range 48.5-55.7) Or1.7±0.4 (range 1.2-2.8, N = 29). Bulk Fe/Mn (XRF) is 35.5±2.7 (N = 5). Oxygen isotopes (R. Greenwood, OU): δ17O 3.031, δ18O 5.257, Δ17O 0.297. Classification: Based on petrography, mineral compositions, bulk Fe/Mn and oxygen isotopes this is a strongly shocked shergottite. Specimens: All at NMBE | ||||||||||||||||||||||||||||||||||||||
| Data from: MB107 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||||||||||
| Institutions and collections |
NMBE: Natural History Museum Bern
Bernastrasse 15
CH-3005 Bern
Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012) OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011) Bern: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address) |
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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:
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Statistics: This is 1 of 2168 approved meteorites from Zufar, Oman (plus 24 unapproved names) This is 1 of 4003 approved meteorites from Oman (plus 436 unapproved names) | ||||||||||||||||||||||||||||||||||||||
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