A New Kind of Plagioclase-Rich Inclusions in the Ningqiang Carbonaceous Chondrite

Details A New Kind of Plagioclase-Rich Inclusions in the Ningqiang Carbonaceous Chondrite A New Kind of Plagioclase-Rich Inclusions in the Ningqiang Carbonaceous Chondrite

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..753l&link_type=abstract

Lunar and Planetary Science, volume 27, page 753

Mathematics

Logic

Alteration, Chondrites: Carbonaceous, Inclusions, Mineralogy, Sintering

Scientific paper

Plagioclase-olivine rich inclusions, Ca-, Al-rich inclusions (CAIs) of type C, and CA chondrules are the known plagioclase-rich inclusions in carbonaceous chondrites. In addition, type B CAIs commonly contain plagioclase. Here, we report a new kind of plagioclase-rich inclusions in the Ningqiang carbonaceous chondrite, anomalous CV3 or anomalous CK3. These plagioclase-rich inclusions consist of 45-49 vol% spinel, 30-40 vol% anorthite, 8-12 vol% Ca-rich pyroxenes, and 3-6 vol% melilite with minor perovskite, nepheline and hedenbergite. All of the inclusions show zoned structure, and are classified into compact and fluffy subtypes. Petrographical and mineralogical evidences indicate that these inclusions were subjected to high-temperature alteration. In addition, after the alteration, the compact subtype experienced a heating event.

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