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Jiddat al Harasis 846
Basic information Name: Jiddat al Harasis 846
     This is an OFFICIAL meteorite name.
Abbreviation: JaH 846
Observed fall: No
Year found: 2011
Country: Oman
Mass:help 260 g
Classification
  history:
Recommended:  OC3    [explanation]

This is 1 of 10 approved meteorites classified as OC3.   [show all]
Search for other: Ordinary chondrites, Ordinary chondrites (type 3)
Comments: Approved 15 Sep 2018
Writeuphelp
Writeup from MB 107:

Jiddat al Harasis 846 (JaH 846)        19.839°N, 55.870°E

Al Wusta, Oman

Find: 2011

Classification: Ordinary chondrite (type 3)

History: Found by an anonymous prospector in Oman in 2011.

Petrography: (A. Irving and S. Kuehner, UWS) Separated, well-formed, medium-sized chondrules (apparent diameter 560±380 µm, N = 40; some up to 2.2 mm) in a finer grained matrix. Minerals are olivine, orthopyroxene, clinopyroxene, sodic plagioclase, silica polymorph, chromite, troilite and altered kamacite. Some chondrules are devoid of olivine and are composed predominantly of orthopyroxene + a silica polymorph.

Geochemistry: Olivine (Fa0.6-38.1; Cr2O3 in ferroan olivine 0.04-0.22 wt.%, mean 0.08 wt.%, sd 0.06 wt.%, N = 9), orthopyroxene (Fs1.9-35.2Wo0.5-4.4, N = 3), clinopyoxene (Fs6.0-6.1Wo43.6-44.8, N = 2). Oxygen isotopes (K. Ziegler, UNM): analyses of 7 acid-washed subsamples by laser fluorination gave δ17O 4.988, 3.882, 4.098, 4.396, 4.262, 4.762, 4.838; δ18O 8.668, 6.724, 6.533, 7.237, 6.999, 8.155, 8.124; Δ17O 0.411, 0.332, 0.649, 0.575, 0.567, 0.456, 0.549 per mil. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.91.

Classification: Ordinary chondrite (OC3). Unusual features of this specimen include chondrules dominated by orthopyroxene + a silica polymorph, oxygen isotopic compositions closer to the TFL than for typical ordinary chondrites with similar degree of desert weathering and extending to very high δ18O values.

Specimens: Type specimen plus one polished thin section are at PSF; main mass with the anonymous finder.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Al Wusta
Date:2011
Latitude:19.839°N
Longitude:55.870°E
Mass (g):260.1
Pieces:1
Class:OC3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):0.6-38.1
Ferrosilite (mol%):1.9-35.2
Wollastonite (mol%):0.5-4.4
Magnetic suscept.:4.91
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24.19
Type spec location:PSF
Main mass:Anonymous
Comments:Work name MCZ1; submitted by A. Irving
Plots: O isotopes:  
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Photos:
CreditPhotos
Public domain photographs:
Tony Irving   
Geography:

Oman
Coordinates:
     Recommended::   (19° 50' 20"N, 55° 52' 12"E)

Statistics:
     This is 1 of 1747 approved meteorites from Al Wusta, Oman (plus 72 unapproved names)
     This is 1 of 3944 approved meteorites from Oman (plus 371 unapproved names)
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