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Basic information Name: Hillsboro
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2019
Country: United States
Mass:help 31 g
Recommended:  H5    [explanation]

This is 1 of 10950 approved meteorites (plus 20 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Sep 2021
Writeup from MB 110:

Hillsboro        32.916, -107.492

New Mexico, United States

Find: 2019 Oct 27

Classification: Ordinary chondrite (H5)

History: Found by Don Musser while he was silver prospecting near Wick’s Gulch. Location of find is a high desert area with many alluvial features with potential for secondary transport mechanisms at work.

Physical characteristics: Saw cut reveals numerous closely packed small chondrules and abundant metal and Fe-oxide grains set in an orange-brown colored matrix.

Petrography: (C. Agee, UNM; D. Dickens, GL) Microprobe examination of a polished mount and optical examination of petrographic thin section shows numerous texturally equilibrated porphyritic chondrules as well as some larger radial chondrules; secondary plagioclase grains are <50 µm in size, abundant Fe-Ni metal, oxidized metal, and extensive oxide veinlets.

Geochemistry: (C. Agee, UNM; D. Dickens, GL) Olivine Fa18.2±0.2, Fe/Mn=38±1, n=6; low-Ca pyroxene Fs16.2±0.3Wo1.2±0.5, Fe/Mn=22±1, n=6.

Classification: Ordinary Chondrite (H5) Shock stage is S3; weathering grade is W2.

Specimens: 6.6 g including a probe mount and thin section on deposit at UNM, Don Musser holds the main mass.

Data from:
  Table 0
  Line 0:
State/Prov/County:New Mexico
Date:2019 Oct 27
Mass (g):31
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):18.2±0.2
Ferrosilite (mol%):16.2±0.3
Wollastonite (mol%):1.2±0.5
Classifier:D. Dickens, GL
Type spec mass (g):6.6
Type spec location:UNM
Main mass:Don Musser holds the main mass
Finder:Don Musser
Comments:Field name DDS2; submitted by Dustin Dickens
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Public domain photographs:
Dustin Dickens      

United States
     Recommended::   (32° 54' 58"N, 107° 29' 31"W)

     This is 1 of 228 approved meteorites from New Mexico, United States (plus 2 unapproved names) (plus 1 impact crater)
     This is 1 of 1888 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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