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Kuresoi
Basic information Name: Kuresoi
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 2014
Country: Kenya
Mass:help 555 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L6
Recommended:  L6    [explanation]

This is 1 of 10979 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Aug 2014
Writeuphelp
Writeup from MB 103:

Kuresoi        0°18.000’S, 35°31.735’E

Nakuru County, Kenya

Fell: 27 February 2014

Classification: Ordinary chondrite (L6)

History: Around 7:30 pm, on 27 February 2014, a bright fireball followed by sonic booms was observed by residents across several Rift Valley counties of Kenya. Most reports were from Bomet, Kericho, and Nakuru counties. The event was widely reported in local newspapers, such as the February 28 edition of Nairobi Exposed. A 555 g stone landed next to a house in Kuresoi, Nakuru County, and was immediately picked up. This stone was kept indoors, which accounts for its unweathered condition despite the rainy season from March to May. Paul Ara, from the neighboring town of Kericho, purchased the stone from the anonymous owners in Kuresoi, of which 279 g was subsequently acquired by Michael Farmer.

Physical characteristics: The exterior of the half stone is covered by dull, black fusion crust to 1 mm. Red clayey soil adheres to one side of the half stone. Interior is bright white, speckled with troilite, and crisscrossed by numerous thin shock veins.

Petrography: (L. Garvie, ASU) Chondrules difficult to recognize and largely integrated into the matrix. There are a few recognizable BO and RP chondrules. Plagioclase up to 100 μm is abundant. Chromite grains up to 200 μm are anhedral with rounded outlines. Troilite grains to 300 μm are largely single crystals and lack shock lamellae, except where cut by thin shock veins. Fe-Ni metal occur as two grain types: the first is irregularly shaped, up to 500 μm grains of kamacite that are equigranular and polycrystalline; the second is rounded grains up to 100 μm, with tetrataenite rims and cores of dark-etching plessite or acicular kamacite. Several of the latter grains have been cleanly cut and displaced by crosscutting shock veins. Metal grains lack Neumann bands. Native copper is rare: two small (10 μm) grains associated with troilite were found. Opaque, fine-grained melt pockets and veins are common.

Geochemistry: (L. Garvie, ASU) Olivine Fa24.9±0.5, FeO/MnO=49.1±1.9, n=14. Ca-poor pyroxene Fs21.2±1.1Wo1.5±0.2, n=10. Ca-rich pyroxene, two analyses, Fs7.0Wo45.9 and Fs8.0Wo44.4. Feldspar An10.3±0.2Or5.1±0.2, n=4.

Classification: L6, W0. Low shock based on the lack of Neumann bands in the kamacite and shock lamellae in the troilite.

Specimens: 23.55 g and one polished mount at ASU. MFarmer and Paul Ara hold the rest of the material.

Data from:
  MB103
  Table 0
  Line 0:
State/Prov/County:Nakuru County
Date:27 February 2014
Latitude:0°18.000'S
Longitude:35°31.735'E
Mass (g):555
Pieces:1
Class:L6
Shock stage:low
Weathering grade:W0
Fayalite (mol%):24.9±0.5
Ferrosilite (mol%):21.2±1.1
Wollastonite (mol%):1.5±0.2
Classifier:L. Garvie, ASU
Type spec mass (g):23.55
Type spec location:ASU
Main mass:MFarmer and Paul Ara
Finder:Anonymous
Comments:Submitted by L. Garvie
Institutions
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Catalogs:
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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Geography:

Kenya
Coordinates:
     Recommended::   (0° 18' 0"S, 35° 31' 44"E)

Statistics:
     This is 1 of 2 approved meteorites from Rift Valley, Kenya
     This is 1 of 8 approved meteorites from Kenya (plus 1 unapproved name)
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