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Jiddat al Harasis 875
Basic information Name: Jiddat al Harasis 875
     This is an OFFICIAL meteorite name.
Abbreviation: JaH 875
Observed fall: No
Year found: 2013
Country: Oman
Mass:help 120 g
Meteoritical Bulletin:  MB 103  (2014)  H4
Recommended:  H4    [explanation]

This is 1 of 6033 approved meteorites (plus 11 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 13 Dec 2014
Writeup from MB 103:

Jiddat al Harasis 875 (JaH 875)        19°32.42’N, 55°16.07’E

Zufar, Oman

Found: Jan 2013

Classification: Ordinary chondrite (H4)

History: Collected by SQU-UWO meteorite research team in January 2013

Physical characteristics: A 123.44g sample supplied by SQU, which has a mm thick, dark brown-red fusion crust present on all faces except one. This fusion crust is unique because the regmaglypts are small (<0.5 cm) causing a bumpy and rough surface. There is little alteration except for iron oxidation causing the red color. This rock has already been cut and there is a clean face already present. The sample is also magnetic.

Petrography (P. Hill, UWO) The majority of the chondrules are well defined with opaque rims composed of iron-nickel oxide and troilite up to 25 μm thick. Oxidization is prevalent throughout the chondrite causing an overall orange hue. Olivine is more commonly oxidized than the low-Ca pyroxene. A majority of the chondrules are porphyritic olivine-pyroxene but porphyritic olivine and porphyritic pyroxene chondrules also make up significant portion. Radial pyroxene, barred olivine, cryptocrystalline and granular chondrules are present. Generally, the chondrules are less than 500 μm but there are a few chondrules that reach up to 750 μm wide; these are primarily radial pyroxene chondrules. A single Al-rich chondrule was observed, composed primarily of feldspar (predominantely albite) but has an euhedral, rectangular inclusion of spinel within it. There is evidence of minor deformation. The matrix is predominantely dark due to large amounts of metal, but there is a large recrystallized component within the matrix. Secondary feldspar is common throughout the thin section. A minor amount of Ca-apatite is also present as irregular, anhedral inclusions within chondrules. The Fe-Ni oxides have a network texture, whereas the troilite is present primarily as inclusions within the chondrules and Fe-Ni oxide. EDS revealed isolated grains of euhedral chromite with some possible vanadium and titanium substitution present. All of the Fe-Ni metal has been oxidized within the thin section; there is little evidence of weathering of silicate minerals besides minor sulfate veins. Weathering category W3, shock stage S1.

Geochemistry: Mineral composition and geochemistry (M. Beauchamp, P. Hill, UWO) Olivine, Fa17.4±0.18 (n=29, PMD Fa=0.94); low-Ca pyroxene, Fs15.4±0.28Wo1.2±0.31 (n=14, PMD Fs=2.1). The composition of the high-Ca pyroxene is suggestive of diopside (Fs5.0Wo46.3, n=1).

Classification: Ordinary chondrite (H4, S1, W3).

Specimens: 116 g type specimen, including polished thin section, are on deposit at SQU.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Desert plain
Place of purchase:SQU
Date:Jan 2013
Mass (g):120
Shock stage:S1
Weathering grade:W3
Fayalite (mol%):17.4±0.2
Ferrosilite (mol%):15.4±0.3; 5.0
Wollastonite (mol%):1.2±0.3; 46.3
Classifier:P. Hill, N. Banerjee, G. Osinski, UWO; S. Nasir, SQU
Type spec mass (g):116
Type spec location:SQU
Main mass:SQU
Finder:SQU-UWO team
Comments:Fileld No SQU -13; submitted by P. Hill
   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)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     Recommended::   (19° 32' 25"N, 55° 16' 4"E)

     This is 1 of 2166 approved meteorites from Zufar, Oman (plus 22 unapproved names)
     This is 1 of 3999 approved meteorites from Oman (plus 434 unapproved names)
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