In:
Meteoritics & Planetary Science, Wiley, Vol. 52, No. 10 ( 2017-10), p. 2275-2283
Abstract:
High‐temperature solid‐state electrochemistry techniques (EMF method) were used to measure the oxygen fugacity ( f O 2 ) of the ordinary chondrites Ochansk (H4), Savtschenskoje (LL4), Elenovka (L5), Vengerovo (H5), and Kharkov (L6). The f O 2 results are presented in the form of the following equations: urn:x-wiley:10869379:media:maps12919:maps12919-math-0001 urn:x-wiley:10869379:media:maps12919:maps12919-math-0002 urn:x-wiley:10869379:media:maps12919:maps12919-math-0003 urn:x-wiley:10869379:media:maps12919:maps12919-math-0004 urn:x-wiley:10869379:media:maps12919:maps12919-math-0005 It was found that f O 2 regularly increases from H chondrites to LL chondrites. Measured f O 2 are ~1.5 higher than those previously calculated from mineral assemblages. Kharkov (L6) is a little more oxidized than Elenovka (L5) in agreement with the progressive oxidation model. At the same time, Ochansk (H4) is more oxidized than Vengerovo (H5) and exhibits a slightly different slope compared to other chondrites and at T 〉 1200 K, becomes more reduced than Kharkov (L6) or Elenovka (L5). Measured oxygen fugacity values of meteorites fall within (0.1–1.0)·log f O 2 of one another. The possible explanation of discrepancies between measured and calculated values is discussed.
Type of Medium:
Online Resource
ISSN:
1086-9379
,
1945-5100
DOI:
10.1111/maps.2017.52.issue-10
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2011097-2
SSG:
16,12
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