The oxygen-isotopic composition of Earth and Mars

Details The oxygen-isotopic composition of Earth and Mars The oxygen-isotopic composition of Earth and Mars

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999m%26ps...34..657f&link_type=abstract

Meteoritics & Planetary Science, vol. 34, no. 4, pp. 657-661 (1999).

Computer Science

53

Scientific paper

The small difference between the oxygen isotopic mass fractionation lines of the Earth and Mars has been measured precisely using a laser fluorination system. The precision achieved from the two sample sets is better than 10.014 d, with the offset (delta17O) between Mars and Earth measured as +0.321d. This result shows that all the SNC meteorites define a high level of isotopic homogeneity, comparable to that of crustal material on the Earth, indicating that these meteorites originate, unequivocally, from a single, common parent body (Mars). ALH84001, with its ancient age (4.56Ga), shows that any initial heterogeneity imparted into Mars from the nebula was homogenised very early in the formation history of the planet.

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