Trace element concentrations in pyrrhotites from Orgueil (CI)

Details Trace element concentrations in pyrrhotites from Orgueil (CI) Trace element concentrations in pyrrhotites from Orgueil (CI)

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..465g&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 465.

Computer Science

Meteoritic Composition, Chondrites, Pyrrhotite, Trace Elements, Mineralogy, X Ray Fluorescence, Scanning Electron Microscopy, Selenium, Copper, Zinc

Scientific paper

In many chondritic meteorites the host phases of trace elements such as copper, zinc, germanium, and selenium are not well known. Therefore, we analyzed 20 hand-picked pyrrhotite (Fe(1-x)S) grains from Orgueil (CI) by analytical scanning electron microscopy and synchrotron X-ray fluorescence microprobe for major, minor, and trace elements. Our results suggest that pyrrhotite is not the main host phase of Cu, Zn, and Ge in Orgueil. In most grains the concentrations of these elements are below CI. Surprisingly, the selenium concentrations are also not high enough to qualify pyrrhotite as the main selenium-bearing phase. This is in sharp contrast to all previous assumptions and requires an intensive search for the real host minerals of this important chalcophile element.

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