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Apache Junction
Basic information Name: Apache Junction
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: before 2005
Country: United States
Mass:help 25 kg
Classification
  history:
Meteoritical Bulletin:  MB 100  (2014)  Iron, IIIAB 
Recommended:  Iron, IIIAB    [explanation]

This is 1 of 292 approved meteorites classified as Iron, IIIAB.   [show all]
Search for other: IIIAB irons, Metal-rich meteorites, and Iron meteorites
Comments: Approved 24 Oct 2011
Writeuphelp
Writeup from MB 100:

Apache Junction        33°27’N, 111°31’W

Arizona, USA

Found: prior to 2005

Classification: Iron meteorite (IIIAB)

History: Purchased by Carleton Moore from the finder in Apache Junction.

Physical characteristics: A single, ellipsoidal (34 × 15 × 12 cm) 25 kg mass reportedly found near the intersection of McKellips Rd. and Ironwood Dr. in the city of Apache Junction, Arizona. The surface of the meteorite exhibits shows minor rusting, and well-developed regmaglypts.

Petrography: (Laurence Garvie, ASU) Medium octahedrite (bandwidth 0.85±0.15). Kamacite with a cross-hatched pattern abundant. Taenite and plessite common (visually ~25% by area). Neumann bands weakly developed. A few long thin Reichenbach lamellae on each slice. Individual lamellae can be followed through several slices and together these lamella form a trapezoid - parallel sides are 35 and 15 mm long and height of ~20 mm. Typical lamella is a 100 μm thick plate of chromite (determined by powder XRD). Some lamellae bordered by troilite and irregular masses of attached schreibersite. Schreibersite (to 500 μm) present in the interiors of kamacite bands. Chromite also present as rare, to 1 mm, euhedral grains with schreibersite. Only one troilite nodule (12x8 mm) present; exhibits a discontinuous schreibersite rim and well-developed swathing kamacite. Traces of heat affected zone present.

Geochemistry: Composition as determined by INAA (J.T. Wasson, UCLA) - Ni 83.9 mg/g; Co 5.28 mg/g; Cr 18 μg/g; Cu 136 μg/g; Ga 20.1 μg/g; As 8.3 μg/g; Ir 0.192 μg/g; Pt 5.7 μg/g; Au 1.153 μg/g; W 0.53 ng/g, and Re <20 ng/g.

Classification: The meteorite is a member of IIIAB. Its nearest North American relatives are El Capitan (0.12 μg/g Ir) and Asarco Mexicana (0.27 μg/g Ir), but the compositional differences are large enough to make it unlikely that it is paired with either of these or with any other well-characterized IIIAB iron.

Specimens: A total of 1500 g are on deposit at ASU.

Data from:
  MB100
  Table 1
  Line 27:
State/Prov/County:Arizona
Origin or pseudonym:bajada
Place of purchase:Apache Junction
Date:prior to 2005
Latitude:33°27'N
Longitude:111°31'W
Mass (g):25000
Pieces:1
Class:Iron, IIIAB
Weathering grade:minor
Classifier:Laurence Garvie, ASU; John Wasson, UCLA
Type spec mass (g):1100
Type spec location:ASU
Main mass:Carleton Moore
Finder:anonymous
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)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Photos:
CreditPhotos
Public domain photographs:
L. Garvie, ASU   
Geography:

United States
Coordinates:
     Recommended::   (33° 27'N, 111° 31'W)

Statistics:
     This is 1 of 130 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1739 approved meteorites from United States (plus 355 unapproved names) (plus 28 impact craters)
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