Differences between Antarctic and non-Antarctic meteorites: an assessment.

Details Differences between Antarctic and non-Antarctic meteorites: an assessment. Differences between Antarctic and non-Antarctic meteorites: an assessment.

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55r...3k&link_type=abstract

Geochimica et Cosmochimica Acta, Vol. 55, No. 1, p. 3 - 18

Physics

Meteorites: Origin, Meteorites: Trace Elements, Meteorites: Volatiles

Scientific paper

The discovery of a statistically significant number of meteorites in Antarctica over the past 20 years has posed many questions. One of the most intriguing suggestions that came up during the study of the Antarctic samples was that there might be a difference between the parent populations of Antarctic and non-Antarctic meteorites. This interpretation was put forward after the detection of a significant difference in the abundances of volatile and mobile trace elements in H, L, and C chondrites and achondrites. The reality of numerous such differences has now been established beyond doubt. Not all differences between the Antarctic and non-Antarctic meteorite populations can be explained by weathering, pairing, or different collection procedures. Variable trace element abundances and distinct differences in the thermal history and thermoluminescence characteristics have to be interpreted as being pre-terrestrial in origin. Such differences imply the existence of meteoroid streams, whose existence poses problems in the framework of our current knowledge of celestial mechanics. However, several independent studies support the existence of such meteoroid streams, thus being consistent with the suggestion of a time-variable influx of extraterrestrial material to Earth. The authors provide a review of the current state of the question for the reality and cause of differences between Antarctic and non-Antarctic meteorites.

Affiliated with

Also associated with

No associations

Rating

Differences between Antarctic and non-Antarctic meteorites: an assessment. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Differences between Antarctic and non-Antarctic meteorites: an assessment., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differences between Antarctic and non-Antarctic meteorites: an assessment. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1895367