Sample Petrographic Description
Sample Number | LAP 03785 |
Newsletter | 28,1 |
Location | LaPaz Ice Field |
Field Number | 16284 |
Dimensions (cm) | 5.0 x 4.0 x 2.0 |
Weight (g) | 43.43 |
Original Classification | CM2 Chondrite |
Pairing | LAP 03718; LAP 03785; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-40 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
The exterior has purplish black fusion crust with some fractures. The interior is black with a few mm sized light colored chondrules. 718 has an evaporate rim. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The sections consist of a few small chondrules (up to 0.5 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa1-48, with a peak at Fa0-2; orthopyroxene is Fs1. The matrix consists dominantly of an Fe-rich serpentine. The meteorites are CM2 chondrites. |
Antarctic Meteorite Images for Sample LAP 03785 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAP03785 | |
Alexander, C.M.O'D., Wynn, J.G., and Bowden, R., 2022, Sulfur abundances and isotopic compositions in bulk carbonaceous chondrites and insoluble organic material: Clues to elemental and isotopic fractions of volatile chalcophiles, Meteoritics & Planetary Science, 57, 334-351, doi:10.1111/maps.13746. | |
Alexander, C. M. O'D., Bowden, R., Fogel, M. L., Howard, K. T., 2015, Carbonate abundances and isotopic compositions in chondrites. Meteoritics & Planetary Science, 50, 810-833, http://dx.doi.org/10.1111/maps.12410. | |
Alexander, C.O'D. M. O, Bowden,. R., Fogel, M. L., Howard, K. T., Herd, C. D. K., Nittler, L. R., 2012, The provenances of asteroids, and their contributions to the volatile inventories of the terrestrial planets. Science, 337(6095), 2012, 721-723. |