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Shawnee
Basic information Name: Shawnee
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2010
Country: United States
Mass:help 8.18 kg
Classification
  history:
Meteoritical Bulletin:  MB 99  (2011)  Iron, IAB-MG
Recommended:  Iron, IAB-MG    [explanation]

This is 1 of 112 approved meteorites classified as Iron, IAB-MG.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 27 May 2011
Writeuphelp
Writeup from MB 99:

Shawnee

Kansas, Johnson County, United States

Purchased: 2010

Classification: Iron meteorite (IAB-MG)

History: A single 8181 g mass was acquired at an estate sale in Shawnee, Kansas. The meteorite had been used for many years as a doorstop by a couple that lived in Shawnee. The owners of the meteorite originally owned farm ground in Barton County, Kansas, but lived for the better part of their lives in Shawnee. Unfortunately, the exact find location is unknown. A small end piece was sent to ASU and confirmed to be a meteorite.

Physical characteristics: Surface shows some fusion crust and minor weathering with broad regmaglypts.

Petrography: (L. Garvie, ASU) Etched sections show a coarse Widmanstätten structure, with stubby kamacite, bandwidth 1.3 mm. Kamacite lamellae display subboundaries and numerous μm-sized phosphide precipitates. Sub-millimeter schreibersite common within some kamacite grains and at grain boundaries. Neumann bands straight and well developed in rhabdite-free grains. Thin taenite and plessite cover several percent by area. Inclusions common - one 7 × 5 cm slice exhibits several (to 2 cm) irregular silicate-graphite-troilite-schreibersite regions. Silicates consist of olivine, low-Ca pyroxene, clinopyroxene, and plagioclase. Slice contains several 1-mm blocky schreibersite with cohenite rims.

Geochemistry: Bulk composition: INAA data (Activation Laboratories - Ancaster, Ontario): Co 0.46 mg/g, Ni 74 mg/g, Ga 57 μg/g, Ge 180 μg/g, Ir 2.24 μg/g, and Au 1.50 μg/g.

Classification: Iron meteorite, IAB-MG, coarse octahedrite, moderately shocked.

Specimens: Type specimens - two slices with total weight of 144.6 g.

Data from:
  MB99
  Table 0
  Line 0:
State/Prov/County:Kansas, Johnson County
Place of purchase:Shawnee
Date:P 2010
Mass (g):8181
Pieces:1
Class:Iron, IAB-MG
Shock stage:moderate
Weathering grade:low
Classifier:Garvie
Type spec mass (g):144.6
Type spec location:ASU
Main mass:Kansas Meteoritical Society
Finder:Kansas Meteoritical Society
Comments:Submitted by Laurence 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)
Catalogs:
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
David L. Ribeca         
John A. Shea   
Geography:

United States
Coordinates:Unknown.

Statistics:
     This is 1 of 144 approved meteorites from Kansas, United States (plus 1 unapproved name) (plus 1 impact crater)
     This is 1 of 1834 approved meteorites from United States (plus 358 unapproved names) (plus 28 impact craters)

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