Solar wind and other gases in the regoliths of the Pesyanoe parent object and the moon

Details Solar wind and other gases in the regoliths of the Pesyanoe parent object and the moon Solar wind and other gases in the regoliths of the Pesyanoe parent object and the moon

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003m%26ps...38..627m&link_type=abstract

Meteoritics &Planetary Science, vol. 38, no. 4, p.627-643

Other

5

Scientific paper

We report new data from Pesyanoe-90,1 (dark lithology) on the isotopic signature of solar wind (SW) Xe as recorded in this enstatite achondrite which represents a soil-breccia of an asteroidal regolith. The low temperature (800 deg C) steps define the Pesyanoe-S xenon component, which is isotopically consistent with SW Xe reported for the lunar regolith. This implies that the SW Xe isotopic signature was the same at two distinct solar system locations and, importantly, also at different times of solar irradiation. Further, we compare the calculated average solar wind "SW-Xe" signature to Chass-S Xe, the indigenous Xe observed in SNC (Mars) meteorites. Again, a close agreement between these compositions is observed, which implies that a mass-dependent differential fractionation of Xe between SW-Xe and Chass-S Xe is <1.5 per amu. We also observe fractionated (Pesyanoe-F) Xe and Ar components in higher temperature steps and we document a fission component due to extinct 244Pu. Interestingly, the Pesyanoe-F Xe component is revealed only at the highest temperatures (>1200 deg C). The Pesyanoe-F gas reveals Xe isotopic signatures that are consistent with lunar solar energetic particles (SEP) data and may indicate a distinct solar energetic particle radiation as was inferred for the moon. However, we cannot rule out fractionation processes due to parent body processes. We note that ratios 36Ar/38Ar 5 are also consistent with SEP data. Calculated abundances of the fission component correlate well with radiogenic 40Ar concentrations, revealing rather constant 244Pu/K ratios in Pesyanoe, and separates thereof, and indicate that both components were retained. We identify a nitrogen component (15N = 44) of non-solar origin with an isotopic signature distinct from indigenous N (15N = -33). While large excesses at 128Xe and 129Xe are observed in the lunar regolith samples, these excesses in Pesyanoe are small. On the other hand, significant 126Xe isotopic excesses, comparable to relative excesses observed in lunar soils and breccias, are prominent in the intermediate temperature steps of Pesyanoe-90,1.

Affiliated with

Also associated with

No associations

Rating

Solar wind and other gases in the regoliths of the Pesyanoe parent object and the moon 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 Solar wind and other gases in the regoliths of the Pesyanoe parent object and the moon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar wind and other gases in the regoliths of the Pesyanoe parent object and the moon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1540416