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Basic information Name: Scottsdale
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2017
Country: United States
Mass:help 211 g
Meteoritical Bulletin:  MB 107  (2018)  LL3
Recommended:  LL3    [explanation]

This is 1 of 491 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 7 Jun 2018
Writeup from MB 107:

Scottsdale        33°42.358’N, 111°56.006’W

Arizona, United States

Find: 1 April 2017

Classification: Ordinary chondrite (LL3)

History: Mr. Todd Dziuk found an unusual looking rock at the edge of a dry wash on 1 April 2017 in a desert area of Scottsdale, Arizona. He noticed that the underside had a rusty appearance and the stone felt slightly heavier than the average rock: power sanding of a corner of the stone revealed numerous bright shiny metallic spots. Extensive searching has not revealed further meteorites.

Physical characteristics: Single 210.8 g stone with broad, shallow regmaglypts. Fusion crust well preserved - light orange stained on the surface in contact with the soil and covered with matte grey fusion crust above the ground. Interior shows tightly packed, well-defined chondrules separated by a dark matrix and scattered metal/troilite grains.

Petrography: SEM observation of a polished mount shows a wide range of chondrule types including PO, PP, BO, RP, POP, and RPT (interleaved radial pyroxene and troilite), with many olivines and pyroxenes zoned. Many chondrules show rims of troilite and more rarely by Fe-Ni metal/troilite. Large range of chondrule sizes with the largest (PO) to 6 × 4 mm, though the majority are <1 mm diameter. Opaques dominated by troilite, with sparse kamacite and high-Ni metal. Kamacite, to 500 μm, is single crystal. Many grains have well-developed curved Neumann bands. Troilite as polycrystalline grains to 500 μm, some grains with twin lamellae. The troilite rimming chondrules often has a "fizzy" texture. Native copper occurs in structurally complex grains of troilite/kamacite/tetrataenite. Scattered melt pockets to 100 microns. Weathering W1 based on minor oxidation of the metal.

Geochemistry: (L. Garvie, ASU) Olivine Fa27.9±7.8, Fa0.7-31.3, Cr2O3=0.06±0.05, range 0.01-0.3 wt%, FeO/MnO=58.3±8.6, CaO=0.12±0.11 wt%, n=29. Low Ca pyroxene Fs15.9±10.2Wo1.7±2.0, FeO/MnO=21.6±6.8. High Ca pyroxene has a wide range of compositions, e.g., Fs9.5Wo30.8, Fs15.6Wo41.7, Fs20.0Wo44.0, and Fs22.6Wo23.9.

Classification: LL3 ordinary chondrite, with estimated 3.6 subtype based on Fa range and Cr2O3 content.

Data from:
  Table 0
  Line 0:
Date:1 April 2017
Mass (g):210.8
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):27.9±7.8
Ferrosilite (mol%):15.9±10.2
Wollastonite (mol%):1.7±2.0
Classifier:L. Garvie, ASU
Type spec mass (g):23.5
Type spec location:ASU
Main mass:with finder
Finder:Mr. Todd Dziuk
Comments:Submitted by L. Garvie
   and collections
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. 107, MAPS 55, 460-462
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United States
     Recommended::   (33° 42' 21"N, 111° 56' 0"W)

     This is 1 of 180 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1929 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)
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