|Basic information||Name: Moss|
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 2006
Mass: 3.76 kg
This is 1 of 7 approved meteorites classified as CO3.6. [show all]
Search for other: Carbonaceous chondrites (type 3), CM-CO clan chondrites, CO chondrites, and Carbonaceous chondrites
Approved 25 Sep 2006|
Revised 10 Jan 2007: Final classification
Writeup from MB 91:
Moss ~59º26' N, ~10º42' E
Fell July 14, 2006, ~10:20 hrs local daylight time (UT+2)
Carbonaceous chondrite (CO3.6)
History and physical characteristics: (G. Raade and K. Ødegaard, UOslo; M. Bilet, NorAS) At about 10:20 am on July 14, 2006, a bright fireball traveling SSE-NNW was witnessed by many people and a loud explosion and a rumbling sound was heard in the air above Moss and Rygge in south Norway, on the east side of the Oslofjord. Shortly after, a small meteorite was heard to land on an aluminum sheet and was recovered. Extensive searches in the area have resulted in the recovery of a total of 5 stones (Table 6). Note that light rainfall occurred in the area on July 29, 30, and 31.
M-S-T: Mass divided between Michael Mazur, Bjørn Sørheim, and Eric Twelker.
Petrography: (J. Grossman, USGS; G. MacPherson, SI; L. Chizmadia, UHaw; A. Rubin, UCLA): Contains abundant small chondrules (most < 200 μm), small (<1 mm) amoeboid olivine aggregates (AOAs) and refractory inclusions, and isolated grains of olivine, troilite, and kamacite set in a gray matrix. Chondrule types are dominated by type-I PO, with other varieties of type I and II chondrules plus RP, C, and BO all present. All type I chondrules show diffusional entry of FeO around edges and along cracks of forsterite grains. Olivine histogram is flat, resembling that of Ornans (range Fa0.3–42, average Fa19.9, σ=65%, n=60); Cr2O3 content of fayalitic olivine is low (0.09±0.09 wt%). Image analysis gives 2.2 vol% metal and 2.4 vol% FeS. Refractory inclusions contain spinel, calcic pyroxene, and abundant nepheline that replaces melilite and other primary phases; some perovskite has been transformed to ilmenite. Some AOAs contain relict cores of forsterite, but most of the olivine has been converted to more fayalitic compositions; degree of oxidation of AOAs is similar to type 3.6 CO chondrites such as ALH 77003. Matrix is mildly recrystallized and sulfur-poor; matrix olivine has similar composition to olivine in fine-grained chondrules and inclusions.
Geochemistry: Magnetic susceptibility (R. Bartoschewitz), log χ (10-9 m3·kg-1) = 4.68. Oxygen isotopes (I. Franchi and R. Greenwood, OU), average of two replicates, δ17O = ‑5.90‰, δ18O = ‑2.21‰, Δ17O = ‑4.75‰.
Classification: Carbonaceous chondrite (CO3.6, scheme of Chizmadia et al., 2002); shock stage S2.
Specimens: Type specimens of 20 g (stone 4) and 2 g (stone 3) are on deposit at SI. Main masses are held by those listed above.
OU: Planetary and Space Sciences
Department of Physical Sciences
The Open University
United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
UOslo: Natural Science Museum, University of Oslo, 1172 - Blindern, 0318 Oslo, Norway (institutional address; updated 16 Oct 2011)
Farmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
NorAS: Norwegian Astronomical Society, Norway (institutional address)
Twelker: Eric Twelker, P.O. Box 33873, Juneau, AK 99803, United States; Website (private address)
UHaw: Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i, 2525 Correa Road, Honolulu, HI 96822, United States (institutional address; updated 25 Oct 2011)
USGS: US Geological Survey, 954 National Center, Reston, VA 20192, United States (institutional address)
|References:||Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)|
This is the only approved meteorite from Ostfold, Norway
This is 1 of 13 approved meteorites from Norway (plus 3 impact craters)
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