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| Jiddat al Harasis 938 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Jiddat al Harasis 938 This is an OFFICIAL meteorite name. Abbreviation: JaH 938 Observed fall: No Year found: 2013 Country: Oman Mass:  1477 g | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 5 approved meteorites classified as R4-5. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 26 Dec 2015 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 104:
Jiddat al Harasis 938 (JaH 938) 19°44.950’N, 55°51.419’E Al Wusta, Oman Find: 28 Jan 2013 Classification: Rumuruti chondrite (R4-5) History: Found by Edwin Gnos, Beda Hofmann, Urs Eggenberger, Thomas Burri, Pete Stephenson and Mohammed Al Battashi during a search for meteorites on January 28, 2013. Physical characteristics: 54 dark brown, wind-ablated fragments ranging from 246 g to less than one gram, total mass 1477 g. Found close together, they probably represent a single, strongly weathered individual. No fusion crust preserved. Petrography: (B. Hofmann, NMBE and E. Gnos, MHNGE) The meteorite is a breccia. Mean apparent chondrule size is 0.51±0.26 mm (n=163), maximum size 0.9 mm. Bimodal feldspar grain size <5 μm and 20-30 μm. Iron sulfides are largely oxidized. Geochemistry: (N. Greber, Bern) Mineral compositions: olivines are Fa38.4±0.8 (Fa36.7-39.4, n=15). Average olivine composition by XRD is Fa38.0±1.0 (n=3). Average low-Ca pyroxene is Fs8.6Wo0.6 (Fs4.6-14.3Wo0.3-1.2, n=5), average high-Ca pyroxene is Fs12.2Wo43.2 (Fs10.8-16.2Wo29.2-52.7, n=4). Feldspar compositions are An11.3Or2.2 (An4.6-14.3Or1.9-2.4, n=4). Oxygen isotopes (R. Greenwood, OU): δ18O=7.43, δ17O=6.07, Δ17O=2.21 (sample leached with ethanolamine thioglycollate to remove Fe-hydroxides). Classification: Based on mineral compositions, oxygen isotopes and plagioclase grain size this is a brecciated Rumuruti chondrite with petrographic grades 4 and 5. Shock grade ranges from S1 to S3 in different clasts. Strongly weathered. Specimens: All at NMBE | ||||||||||||||||||||||||||||||||||||
| Data from: MB104 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) MHNGE: Muséum d’histoire naturelle, Route de Malagnou 1, CH-1211 Genève 6 , Switzerland (institutional address; updated 27 Oct 2011) Bern: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address) |
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| References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:
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Statistics: This is 1 of 1756 approved meteorites from Al Wusta, Oman (plus 75 unapproved names) This is 1 of 4002 approved meteorites from Oman (plus 434 unapproved names) | ||||||||||||||||||||||||||||||||||||
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