|Basic information||Name: Catalina 037|
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2010
Mass: 2.22 kg
This is 1 of 412 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites
|Comments:||Approved 14 May 2013|
Writeup from MB 102:
Catalina 037 25.1°S, 69.75833°W
Found: 5 Jul 2010
History: On 5 July 2010, while hunting for meteorites, Eric Christensen found more than 100 fragments within several meters of each other totaling 2219 g, the largest of which was 654 g. Exteriors of the fragments are pitted. Fusion crust is lacking.
Physical characteristics: Stone relatively easy to cut with a diamond blade. Interior is brownish green. Polished slices (4 × 3 cm) show uneven distribution of fine- to medium-grained areas (dominant) and medium- to coarse-grained regions, with crystals to ~1 cm.
Petrography: (L. Garvie, ASU) Two thin sections examined. First section dominated by fine- to medium-grained (to 1.5 × 0.6 mm) anhedral grains of olivine and pigeonite, with slight preferred orientation, and abundant 120° triple junctions. Second section dominated by large pigeonite pyroxene grains poikilitically enclosing smaller, rounded compositionally homogenous olivines. Pigeonite and olivine have similar compositional ranges in the two sections. Very low reduction level with thin (<50 μm) reduction rims. Graphite flakes (to 150 × 50 μm) present between olivine grains. Very little metal and terrestrial oxides present. Fairly abundant olivine-olivine grain-boundary veins (to 60 μm wide) consisting of feldspar surrounding euhedral augite crystals (to 50 μm). Low-Ca pyroxene (<20 μm) occurs within the feldspar adjacent to the graphite-rich regions.
Geochemistry: (L. Garvie, ASU) Olivine cores Fa19.9±0.3, FeO/MnO=45.6±3.4, CaO up to 0.34 wt%, Cr2O3 up to 0.51 wt%, n=14. Reduced rims down to Fa3.4. Pigeonite Fs16.6±0.2Wo10.9±0.1, n=12. Olivine-olivine assemblage consisting of plagioclase feldspar host (two points analyzed An47.6Ab48.3Or4.1, An41.0Ab48.7Or10.3) enclosing euhedral low-Ca pyroxene (Fs3.3±1.7Wo5.0±0.5, n=3) and augite (Fs2.1±0.7Wo37.7±2.6, n=4).
Specimens: 83.5 g and two thin sections at ASU.
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
|References:||Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015|
This is 1 of 925 approved meteorites from Antofagasta, Chile (plus 1 impact crater)
This is 1 of 950 approved meteorites from Chile (plus 9 unapproved names) (plus 1 impact crater)
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