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Jiddat al Harasis 804
Basic information Name: Jiddat al Harasis 804
     This is an OFFICIAL meteorite name.
Abbreviation: JaH 804
Observed fall: No
Year found: 2013
Country: Oman
Mass:help 4.4 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 576 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 16 Dec 2013
Writeuphelp
Writeup from MB 102:

Jiddat al Harasis 804 (JaH 804)        19.829°N, 56.482°E

Al Wusta, Oman

Found: 2013 Jan

Classification: HED achondrite (Eucrite)

History: Found by a meteorite prospector in January 2013.

Petrography: (A. Irving, UWS; A. Wittmann, WUSL) Igneous texture with larger (>1 mm) grains of exsolved pigeonite and calcic plagioclase plus interstitial groundmass regions rich in finer plagioclase laths and vesicular glass. Plagioclase contains numerous blebs of troilite, and pigeonite consists of patchy zones of recrystallized Ca-rich and Ca-poor pyroxene. Some clinopyroxene and plagioclase occurs as symplectitic intergrowths. Other accessory phases are ilmenite, Ti-rich chromite, Ti-poor chromite, silica polymorph, and a single Ni-free Fe-metal grain. Secondary celestite and strontiobarite (crystals ~10 μm in size) are quite common.

Geochemistry: (S. Kuehner, UWS; A. Wittmann, WUSL): Orthopyroxene (En55.2-57.8Wo5.9-3.1, FeO/MnO = 32), clinopyroxene (Fs27.0-27.6Wo41.7-41.0, FeO/MnO = 31-34), plagioclase (An86-91Or0.4-0.5). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave (in per mil) δ17O 1.561, 1.613; δ18O 3.473, 3.501; Δ17O -0.273, -0.236 (for a TFL slope of 0.528).

Classification: Eucrite. This specimen is unusual because it has a vesicular groundmass, yet its oxygen isotopic composition is similar to those of most eucrites.

Specimens: 24 g including one polished thin section at UWB. The remaining material is held by the anonymous finder.

Data from:
  MB102
  Table 0
  Line 0:
State/Prov/County:Al Wusta
Date:2013 Jan
Latitude:19.829°N
Longitude:56.482°E
Mass (g):4400
Pieces:several
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):55.2-57.8; 27.0-27.6
Wollastonite (mol%):5.9-3.1; 41.7-41.0
Classifier:A. Irving, UWS, and A. Wittmann, WUSL
Type spec mass (g):24
Type spec location:UWB
Main mass:Anonymous
Comments:Submitted by A. Irving
Plots: O isotopes:  
Institutions
   and collections		 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography:

Oman
Coordinates:
     Recommended::   (19° 49' 44"N, 56° 28' 55"E)

Statistics:
     This is 1 of 1756 approved meteorites from Al Wusta, Oman (plus 75 unapproved names)
     This is 1 of 4001 approved meteorites from Oman (plus 436 unapproved names)
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