Complex Zoned Pyroxenes in Shergottite QUE 94201: Evidence for a Two-Stage Crystallization History

Details Complex Zoned Pyroxenes in Shergottite QUE 94201: Evidence for a Two-Stage Crystallization History Complex Zoned Pyroxenes in Shergottite QUE 94201: Evidence for a Two-Stage Crystallization History

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..851m&link_type=abstract

Lunar and Planetary Science, volume 27, page 851

Other

6

Crystallization, Pyroxene, Shergottite, Zoning

Scientific paper

QUE 94201 (Q) is a new Antarctic shergottite that is petrographically similar to other basaltic shergottites. As with them, clinopyroxene was the first mineral to crystallize, and thus likely contains clues to the composition of the parent melt and details of the crystallization history. We have used the elemental mapping capability of our new Cameca SX100 electron microprobe to study details of the pyroxene zoning patterns in this sample, and have inferred from them that Q underwent a dramatic change in growth regime during pyroxene crystallization, possibly through migration from a magma chamber to a shallow intrusion or lava flow, as suggested for Zagami by McCoy et al.

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