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Pecora Escarpment 01030 | |||||||||||||||||||||||||||||||||||||
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Basic information | Name: Pecora Escarpment 01030 This is an OFFICIAL meteorite name. Abbreviation: PCA 01030 Observed fall: No Year found: 2002 Country: Antarctica [Collected by Planetary Studies Foundation (US)] Mass: ![]() | ||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 44 approved meteorites classified as Diogenite-pm. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||||||||||
Comments: | Approved 19 Jan 2012 | ||||||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 100:
Pecora Escarpment 01030 (PCA 01030) 85°39.259’S, 68°34.323’W Antarctica Found: 2002 Jan 20 Classification: HED achondrite (Diogenite, polymict) Petrography: Fragmental breccia consisting mostly of disaggregated material from diogenite protoliths, plus grains of calcic plagioclase and exsolved pigeonite derived probably from cumulate eucrites. Accessory minerals include chromite, ilmenite and troilite. Orthopyroxene exhibits undulose extinction and plagioclase is partly recrystallized (exhibiting complex twinning and some polygonal subgrains). Eucritic material makes up less than 10 vol.% of the specimen. Geochemistry: Diogenitic orthopyroxene Fs18.7Wo1.3, Fs24.4Wo3.0, rim Fs34.0Wo3.5, Fe/Mn=28-32; orthopyroxene host Fs51.2Wo1.6, Fe/Mn=27; clinopyroxene exsolution lamellae Fs20.9-25.3Wo43.9-41.3. Classification: Diogenite-pmict Specimens: Remaining stone plus one polished thin section at FMNH | ||||||||||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1770: |
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Institutions and collections |
FMNH: Department of Geology
The Field Museum of Natural History
1400 South Lake Shore Drive
Chicago, IL 60605-2496, USA, United States; Website (institutional address; updated 16 Nov 2011) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:![]() |
Statistics: This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||||||||||||||||||
Proximity search: |