Fe-S-Ca-Al-bearing carbonaceous vein in the Yamato-74130 ureilite - Evidence for a genetic link to carbonaceous chondrites

Details Fe-S-Ca-Al-bearing carbonaceous vein in the Yamato-74130 ureilite - Evidence for a genetic link to carbonaceous chondrites Fe-S-Ca-Al-bearing carbonaceous vein in the Yamato-74130 ureilite - Evidence for a genetic link to carbonaceous chondrites

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.1475t&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, May 1990, p. 1475-1481. Research supported by the Mitsubishi Scientif

Computer Science

5

Aluminum Compounds, Calcium Compounds, Carbonaceous Chondrites, Iron Compounds, Sulfur Compounds, Ureilites, Crystal Growth, Electron Microscopy, Grain Size, Particle Size Distribution, Meteorites, Antarctic Meteorites, Yamato Meterorites, Yamato 74130, Iron, Sulfur, Calcium, Aluminum, Carbonaceous Chondrites, Ureilites, Classification, Samples, Meteorite, Petrography, Electron Microscopy, Sem, Depletion, Elements, Formation, Origin, Melting, Crystallization, Parent Material, C Chondrites, Collisions, Proce

Scientific paper

A petrographic and SEM study was performed on a 4.7 x 0.3 mm carbonaceous vein found in the Yamato-74130 ureilite. It is found that the vein contains a complex network of S-rich Fe-S-rich, Al-rich, and Si-rich regions. The elements (S, Fe, Al, Ca, and Na) in the internal regions of the vein are the elements that are strongly depleted in ureilites relative to carbonaceous chondrites. The presence of these elements in the carbonaceous veining suggest that the internal materials are remnants of drain channels for the depleted elements produced during the formation of ureilites from carbonaceous chondrites. It is concluded that the carbonaceous vein provides evidence that ureilites result from preferential melting and recrystallization of carbonaceous chondrites by a temperature-gradient zone refining process during a planetesimal-scale collision.

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