Ca-Al-rich chondrules and inclusions in ordinary chondrites

Details Ca-Al-rich chondrules and inclusions in ordinary chondrites Ca-Al-rich chondrules and inclusions in ordinary chondrites

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.303..588b&link_type=abstract

Nature (ISSN 0028-0836), vol. 303, June 16, 1983, p. 588-592. Research supported by the Deutsche Forschungsgemeinschaft.

Computer Science

32

Aluminum Compounds, Calcium Compounds, Chondrites, Chondrule, Inclusions, Meteoritic Composition, Crystallization, Melting, Mineralogy, Refractory Materials

Scientific paper

Ca-Al-rich objects, hitherto mostly found in carbonaceous chondrites, are shown to be widespread, albeit rare, constituents of type 3 ordinary chondrites. Widespread occurrence and textural similarities of Ca-Al-rich chondrules to common, Mg-Fe-rich chondrules suggest that they formed by related processes. It is suggested in this article that Ca-Al-rich chondrules were formed by total melting and crystallization of heterogeneous, submillimeter- to submillimeter-sized dustballs made up of mixtures of high-temperature, Ca-Al-rich and lower-temperature, Na-K-rich components.

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