Volume 44 No. 1 – March 2021
Table 1. Newly Classified Antarctic Meteorites
| Sample Number | Weight (g) | Classification | Weathering |
Fracturing |
%Fa |
%Fs |
Magnetic Susceptibility | |
|---|---|---|---|---|---|---|---|---|
| DOM 18160 | 25.2 | L5 CHONDRITE | B/Ce | B | 24 | 21 | 4.490 | |
| DOM 18161 | 28.5 | L6 CHONDRITE | B | A/B | 25 | 21 | 4.440 | |
| DOM 18162 | 24.4 | L5 CHONDRITE | B | A | 25 | 21 | 4.690 | |
| DOM 18163 | 20.7 | H6 CHONDRITE | B/C | A | 19 | 17 | 4.770 | |
| DOM 18164 | 11.5 | L5 CHONDRITE | B | A | 25 | 21 | 4.570 | |
| DOM 18167 | 19.3 | L6 CHONDRITE | B | A | 24 | 21 | 4.520 | |
| DOM 18168 | 18.9 | H6 CHONDRITE | B | A/B | 19 | 17 | 5.020 | |
| DOM 18860 | 1.0 | H5 CHONDRITE | B | A | 19 | 16 | 4.560 | |
| DOM 18861 | 1.5 | H5 CHONDRITE | B/C | A/B | 19 | 17 | 4.810 | |
| DOM 18862 | 1.7 | L3.6 CHONDRITE | B/C | A/B | 8-30 | 17 | 4.060 | |
| DOM 18864 | 1.6 | H5 CHONDRITE | B/C | A/B | 19 | 17 | 4.960 | |
| DOM 18865 | 2.8 | L5 CHONDRITE | B | A | 24 | 21 | 4.660 | |
| GRO 17022 | 112.4 | L3.6 CHONDRITE | A/B | A/B | 3-31 | 7 | 4.250 | |
| GRO 17060 | 216.1 | CR2 CHONDRITE | B | A/B | 1 | 1-14 | 5.120 | |
| GRO 17108 | 193.5 | L5 CHONDRITE | A/B | A | 26 | 22 | 4.468 | |
| GRO 17139 | 8.4 | CK6 CHONDRITE | A/B | A/B | 26 | 4.920 | ||
| GRO 17142 | 1300.9 | LL3.6 CHONDRITE | A/B | A/B | 0-31 | 3-9 | 4.100 | |
| NOD 17241 | 8.3 | H5 CHONDRITE | B | A | 18 | 17 | 5.285 | |
| PRE 17271 | 17.5 | R3 CHONDRITE | A/Be | B | 39-47 | 2-25 | 3.220 | |
| PRE 17272 | 15.5 | R3 CHONDRITE | A/B | B | 12-44 | 6-13 | 3.250 | |
| PRE 17275 | 197.5 | H6 CHONDRITE (ANOMALOUS) | B | A | 16 | 14 | 5.230 | |
| WSG 17260 | 244.8 | H5 CHONDRITE | A/B | A | 19 | 17 | 5.340 | |
| WSG 17261 | 184.0 | L5 CHONDRITE | A/Be | A/B | 24 | 20 | 4.710 | |
Classification of all meteorites in Table 1 & 2 was done using electron microprobe analysis. Petrologic types are determined by optical microscopy and are assigned based on the distinctiveness of chondrule boundaries in thin section and thin section photographs. Those undertaking detailed study of any of the meteorites classified in this newsletter should use caution. It is recommended that a polished thin section be requested to accompany any chip and appropriate steps for a more detailed characterization should be undertaken by the user. (Cari Corrigan, Smithsonian Institution) |
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