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Jiddat al Harasis 1102
Basic information Name: Jiddat al Harasis 1102
     This is an OFFICIAL meteorite name.
Abbreviation: JaH 1102
Observed fall: No
Year found: 2015
Country: Oman
Mass:help 95 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 8 Jan 2018
Writeuphelp
Writeup from MB 107:

Jiddat al Harasis 1102 (JaH 1102)        19°25.34’N, 55°53.44’E

Al Wusta, Oman

Find: 15 Feb 2015

Classification: Ureilite

Physical characteristics: A 95 g sample supplied by the Sultan Qaboos University, which has a millimeter thick, dark brown-gray fusion crust present on all faces except one cut face. This fusion crust lacks remaglypts on 3 of faces, however a smooth face with small remaglypts is present. There are no contraction cracks present on this sample. This rock has already been cut and there is a clean face already present. Rounded grey laths can be identified on the cut face, with most less than 0.5 cm wide. The sample is also magnetic.

Petrography (P. Hill, UWO) The sample is a composed of elongated grains of olivine and pyroxene that are ~1-2 mm wide, often meeting at 120° angles. The olivine grains show mocaicized texture suggesting a high level of shock. Pyroxene grains are fractured but still have sharp, distinct extinction. The grain boundaries are defined by oxides, and there is little porosity between grain boundaries. Pyroxene is often associated with small porous inclusions throughout the grains. Though the grain boundaries are defined by iron oxides, kamacite and taenite are present as inclusions within grains where fractures have not exposed the metal to terrestrial weathering. In one occurrence and iron oxide rim surrounds a Fe-Ni core; however, most of the iron oxide occurs as veins running along grain boundaries. Troilite was also observed as a large (200 µm) inclusion within a pyroxene grain. Though diamonds and carbide were not observed within these thin sections, graphite is observed. The reduction rims of olivine grains are ~50 µm thick. According to the classification system put forward by Wittke et al. (2007), this sample fits with the R2 grade. Overall there is little evidence of the silicate phases weathering except for the occurrence of several sulphate veins. The olivine within these samples does show undulose extinction and the mosaic texture of the olivines suggest high levels of shock metamorphism.

Geochemistry: Mineral composition and geochemistry (M. Beauchamp, P. Hill, UWO) Olivine (Fa21.8±2.0), low-Ca pyroxene (Fs16.6±1.6Wo6.8±1.9)

Classification: Classificaiton: Ureilite, S5, W3.

Specimens: 95 g type specimen, including polished thin section, are on deposit at SQU.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Al Wusta
Date:15 Feb 2015
Latitude:19°25.34'N
Longitude:55°53.44'E
Mass (g):95
Pieces:2
Class:Ureilite
Fayalite (mol%):23.9±1.5 (N=41)
Ferrosilite (mol%):16.6±1.7 (N=35)
Wollastonite (mol%):6.8±1.9
Classifier:P. Hill, N. Banerjee, G. Osinski, UWO; S. Nasir, SQU
Type spec mass (g):95
Type spec location:SQU
Main mass:SQU
Comments:Submitted by P. Hill
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Geography:

Oman
Coordinates:
     Recommended::   (19° 25' 20"N, 55° 53' 26"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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