X-ray investigations related to the shock history of the Shergotty achondrite

Details X-ray investigations related to the shock history of the Shergotty achondrite X-ray investigations related to the shock history of the Shergotty achondrite

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50..905h&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 16th, Houston,

Other

4

Achondrites, Meteoritic Composition, Mineralogy, Shock Loads, X Ray Diffraction, Crystal Lattices, Debye-Scherrer Method, Evolution (Development), Meteorites, Stony Meteorites, Achondrites, Shergotty, Samples, Meteorite, X-Ray Methods, Shock Effects, Xrd, Laboratory Studies, Refractive Index, Structure, Pressure, Procedure, Diffraction, Pyroxene, Maskelynite

Scientific paper

The shock stress suffered by naturally shocked materials from the Shergotty achondrite was studied using X-ray diffraction techniques and experimentally shocked augite and enstatite as standards. The Shergotty pyroxenes revealed the formation of continuous diffraction rings, line broadening, preferred orientation of small scale diffraction domains, and other evidence of substantial lattice disorders. As disclosed by the application of Debye-Scherrer techniques, they are hybrids between single crystals and fine-grained random powders. The pyroxene lattice is very resistant to shock damage on smaller scales. While measurable lattice disaggregation and progressive fragmentation occur below 25 GPa, little additional damage is suffered from application of pressures between 30 to 60 GPa, making pressure calibration of naturally shocked pyroxenes via X-ray methods difficult. Powder diffractometer scans on pure maskelynite fractions of Shergotty revealed small amounts of still coherently diffracting plagioclase, which may contribute to the high refractive indices of the diaplectic feldspar glasses of Shergotty.

Affiliated with

Also associated with

No associations

Rating

X-ray investigations related to the shock history of the Shergotty achondrite 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 X-ray investigations related to the shock history of the Shergotty achondrite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray investigations related to the shock history of the Shergotty achondrite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1832269