Troilite Cosmothermometer: Application to L-Chondrites
Abstract
The alpha/beta phase transformation in troilite in L-chondrites, as measured by differential scanning calorimetry (DSC) of milligram-scale, whole-rock samples, can be used to evaluate differences in thermal history among individual meteorites. Extrapolated onset temperature and enthalpy change of the transition are correlated with petrographic indices of metamorphism. The natural relict temperatures inferred from troilite in L3-L6 chondrites show apparent values <=460 K that vary systematically with metamorphic and shock grades.
- Publication:
-
Lunar and Planetary Science Conference
- Pub Date:
- March 1996
- Bibcode:
- 1996LPI....27..731L
- Keywords:
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- CHONDRITES;
- DIFFERENTIAL SCANNING CALORIMETRY;
- THERMOMETRY;
- TROILITE