Sample Petrographic Description
Sample Number | LAP 04824 |
Newsletter | 30,2 |
Location | LaPaz Ice Field |
Field Number | 17037 |
Dimensions (cm) | 2.25 x 2.0 x 0.5 |
Weight (g) | 1.71 |
Original Classification | CM1 Chondrite |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior is black/brown with no fusion crust. The interior is a soft black matrix with mm sized light color inclusions. | |
Thin Section Description (,2) - Tim McCoy, Lauren LaCroix, Linda Welzenbach | |
The section consists of a few small chondrules (up to 0.5 mm) that have been completely replaced by phyllosilicate set in an Fe-rich serpentine matrix. No isolated mineral grains or CAIs are apparent; sulfide grains are present. Unaltered olivine or pyroxene grains of sufficient size for microprobe analyses were not found. The meteorite is a highly altered CM1 chondrite. |
Antarctic Meteorite Images for Sample LAP 04824 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAP 04824 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAP04824 | |
Friedrich, J. M., Abreu, N. M., Wolf, S. F., Troiano, J. M., & Stanek, G. L., 2018, Redox-influenced trace element compositional differences among variably aqueously altered CM chondrites. Geochimica et Cosmochimica Acta, 237, 1-17. | |
Rubin, A. E., 2010, Physical properties of chondrules in different chondrite groups: Implications for multiple melting events in dusty environments. Geochimica et Cosmochimica Acta, 74 Issue 16, 15-Aug-10, 4807-4828, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2010.05.018. |