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Hillsboro
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
Classification
  history:
Recommended:  H5    [explanation]

This is 1 of 10308 approved meteorites (plus 45 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
Writeuphelp
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:
  MB110
  Table 0
  Line 0:
State/Prov/County:New Mexico
Date:2019 Oct 27
Latitude:32.916
Longitude:-107.492
Mass (g):31
Pieces:1
Class:H5
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
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
Dustin Dickens      
Geography:

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

Statistics:
     This is 1 of 227 approved meteorites from New Mexico, United States (plus 2 unapproved names) (plus 1 impact crater)
     This is 1 of 1881 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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