Table 1. Newly Classified Antarctic Meteorites
Sample Number | Weight (g) | Classification | Weathering |
Fracturing |
%Fa |
%Fs |
---|---|---|---|---|---|---|
LAR 12056 | 57.0 | LL6 Chondrite | A/B | A | 30 | 25 |
LAR 12156 | 59.2 | EH3 Chondrite | A | A/B | 0-7 | |
LAR 12196 | 16.6 | H6 Chondrite | A | A | 20 | |
LAR 12215 | 6.6 | H6 Chondrite | B/C | A/B | 19 | 17 |
LAR 12241 | 126.0 | LL5 Chondrite | A | B/C | 31 | 25 |
LAR 12244 | 131.2 | EH3 Chondrite | A/B | A | 0-3 | |
LAR 12279 | 76.9 | EL6 Chondrite | A/B | A | 0-1 | |
MIL 13002 | 3691.3 | H5 Chondrite | B | B/C | 19 | 17 |
MIL 13008 | 2060.8 | L5 Chondrite | A/B | B | 23 | 21 |
MIL 13011 | 730.3 | L5 Chondrite | B/C | A/B | 25 | 21 |
MIL 13032 | 0.6 | CV3 Chondrite | A/B | A | 1-2 | 1-2 |
MIL 13034 | 4.4 | H4 Chondrite | B | A | 19 | 3-18 |
MIL 13037 | 0.2 | CM1 Chondrite | A/Be | A | ||
MIL 13039 | 39.5 | H4 Chondrite | B/C | A | 17 | 16 |
MIL 13059 | 0.7 | LL5 Chondrite | A/B | A | 29 | 25 |
MIL 13063 | 0.2 | CM1 Chondrite | A/B | A/B | ||
MIL 13065 | 0.1 | CM2 Chondrite | A/B | A | 1-5 | 2-7 |
MIL 13100 | 26.8 | L6 Chondrite | A/Be | B/C | 26 | |
MIL 13101 | 11.1 | H5 Chondrite | B/C | A/B | 21 | |
MIL 13102 | 36.9 | L6 Chondrite | A/B | A/B | 26 | |
MIL 13103 | 41.5 | L6 Chondrite | B/C | A/B | 23 | 21 |
MIL 13104 | 46.5 | LL5 Chondrite | Be | B | 30 | 25 |
MIL 13105 | 37.4 | H5 Chondrite | B/C | A/B | 20 | |
MIL 13106 | 15.9 | H6 Chondrite | B/C | A | 19 | |
MIL 13107 | 37.7 | H6 Chondrite | Ce | B | 20 | 18 |
MIL 13108 | 24.6 | L5 Chondrite | B | A/B | 25 | |
MIL 13109 | 12.6 | H6 Chondrite | Ce | A | 20 | |
MIL 13130 | 16.8 | LL6 Chondrite | A/B | A | 28 | |
MIL 13131 | 11.4 | H6 Chondrite | B/C | A | 20 | |
MIL 13133 | 11.7 | H5 Chondrite | B/C | A/B | 21 | |
MIL 13134 | 15.6 | L6 Chondrite | B | A | 25 | |
MIL 13135 | 11.7 | H6 Chondrite | A/B | A | 18 | |
MIL 13136 | 0.8 | CK3-6 Chondrite | B | A | 18-34 | |
MIL 13137 | 0.5 | CM2 Chondrite | B | A | 1-47 | 1-4 |
MIL 13138 | 3.6 | LL5 Chondrite | B | A | 29 | 24 |
MIL 13140 | 9.0 | LL5 Chondrite | Be | A | 28 | 24 |
MIL 13141 | 3.6 | LL4 Chondrite | Be | A | 28 | 24 |
MIL 13142 | 17.3 | LL6 Chondrite | B | A/B | 28 | |
MIL 13144 | 2.3 | H6 Chondrite | B/C | A | 20 | |
MIL 13145 | 10.6 | L5 Chondrite | B/C | A | 26 | |
MIL 13146 | 10.4 | H6 Chondrite | B/C | A/B | 19 | |
MIL 13147 | 2.3 | L6 Chondrite | B/C | A/B | 25 | |
MIL 13148 | 6.6 | H6 Chondrite | B/C | A | 21 | |
MIL 13149 | 42.5 | H5 Chondrite | Be | A/B | 21 | |
MIL 13150 | 0.6 | L5 Chondrite | A/B | A | 25 | |
MIL 13151 | 1.0 | H4 Chondrite | B/C | A/B | 18 | 17 |
MIL 13152 | 1.8 | EH3 Chondrite | B/C | A/B | 0-1 | |
MIL 13153 | 1.1 | H6 Chondrite | B/C | A/B | 18 | |
MIL 13154 | 0.7 | L5 Chondrite | A/B | A/B | 25 | |
MIL 13155 | 1.7 | LL4 Chondrite | B | A | 29 | |
MIL 13156 | 1.6 | L6 Chondrite | B/C | A | 25 | |
MIL 13157 | 0.8 | LL5 Chondrite | A/B | A | 29 | |
MIL 13158 | 1.7 | H6 Chondrite | B/C | A | 20 | |
MIL 13159 | 2.0 | H6 Chondrite | B/C | A | 20 | |
MIL 13160 | 5.3 | H6 Chondrite | C | A/B | 18 | |
MIL 13161 | 3.7 | H5 Chondrite | Ce | A/B | 18 | |
MIL 13162 | 5.0 | H5 Chondrite | B/C | B/C | 19 | |
MIL 13163 | 5.0 | H5 Chondrite | C | A | 20 | |
MIL 13164 | 5.2 | L5 Chondrite | C | B/C | 26 | |
MIL 13165 | 5.4 | L4 Chondrite | C | A/B | 25 | 22 |
MIL 13166 | 16.6 | L5 Chondrite | Ce | A | 25 | |
MIL 13167 | 10.2 | LL5 Chondrite | A/B | B | 29 | 24 |
MIL 13168 | 5.7 | L5 Chondrite | C | B | 25 | |
MIL 13169 | 2.0 | CM2 Chondrite | Be | A/B | 0-67 | |
MIL 13170 | 1.8 | H5 Chondrite | B | A` | 19 | |
MIL 13171 | 1.1 | LL4 Chondrite | A/Be | A | 28 | 25 |
MIL 13172 | 1.2 | LL4 Chondrite | A/B | A | 30 | |
MIL 13173 | 2.5 | L5 Chondrite | B/C | A | 25 | |
MIL 13174 | 2.6 | Mesosiderite | Be | A/B | 28-57 | |
MIL 13175 | 1.3 | L6 Chondrite | B | A | 26 | |
MIL 13176 | 3.3 | H5 Chondrite | B/C | A/B | 20 | |
MIL 13177 | 2.9 | LL5 Chondrite | B | A | 29 | |
MIL 13178 | 1.5 | H6 Chondrite | B/C | A/B | 21 | |
MIL 13179 | 0.3 | L6 Chondrite | B | A | 26 | 22 |
MIL 13180 | 1.1 | Ureilite | B | A | 12-13 | 11 |
MIL 13181 | 0.8 | L6 Chondrite | B | A | 26 | |
MIL 13182 | 1.4 | L5 Chondrite | B/C | A | 26 | 23 |
MIL 13183 | 0.1 | LL6 Chondrite | B | A | 29 | |
MIL 13184 | 0.9 | L6 Chondrite | B | A | 25 | |
MIL 13185 | 1.1 | H5 Chondrite | B/C | A | 20 | |
MIL 13186 | 0.5 | LL4 Chondrite | B | A | 29 | |
MIL 13188 | 0.9 | LL5 Chondrite | B | A | 29 | |
MIL 13189 | 2.7 | L6 Chondrite | B/C | A | 25 | |
MIL 13190 | 1.9 | L4 Chondrite | B | A | 26 | |
MIL 13191 | 4.6 | LL4 Chondrite | B | A | 29 | |
MIL 13192 | 2.4 | LL5 Chondrite | B | A/B | 29 | |
MIL 13193 | 7.6 | H6 Chondrite | B/C | A | 19 | |
MIL 13194 | 5.5 | H5 Chondrite | B/C | A | 21 | |
MIL 13195 | 6.7 | H4 Chondrite | B | A/B | 20 | 17 |
MIL 13196 | 10.7 | H6 Chondrite | B/C | A/B | 19 | |
MIL 13198 | 8.4 | H5 Chondrite | B/C | A/B | 19 | 17 |
MIL 13199 | 11.2 | H5 Chondrite | B/C | A | 20 | |
MIL 13210 | 2.2 | L6 Chondrite | B | A | 25 | |
MIL 13211 | 0.5 | EH3 Chondrite | A/B | B | 1-3 | |
MIL 13213 | 3.2 | H6 Chondrite | B/C | A | 18 | |
MIL 13214 | 1.5 | CO3 Chondrite | B/C | B | 1-28 | 1-2 |
MIL 13215 | 6.1 | H5 Chondrite | B | A | 20 | |
MIL 13216 | 1.2 | LL4 Chondrite | B | A/B | 29 | |
MIL 13217 | 2.5 | H5 Chondrite | B | A | 19 | |
MIL 13218 | 2.0 | H6 Chondrite | C | B | 20 | |
MIL 13219 | 1.2 | H5 Chondrite | C | B | 20 | |
MIL 13220 | 0.6 | L6 Chondrite | B/C | A | 25 | |
MIL 13221 | 1.0 | H5 Chondrite | B/C | A | 20 | |
MIL 13222 | 1.4 | LL5 Chondrite | A/B | A | 30 | |
MIL 13223 | 0.7 | L5 Chondrite | A/B | A | 25 | |
MIL 13224 | 0.7 | LL6 Chondrite | A/B | A | 29 | |
MIL 13226 | 0.7 | EH3 Chondrite | A/B | A/B | 0-1 | |
MIL 13227 | 2.2 | L5 Chondrite | A/B | A | 25 | |
MIL 13228 | 3.3 | LL5 Chondrite | B | A | 28 | 25 |
MIL 13229 | 3.9 | H5 Chondrite | B/C | A/B | 20 | |
MIL 13230 | 1.8 | L6 Chondrite | B/C | A | 26 | |
MIL 13231 | 0.8 | H5 Chondrite | B | A | 18 | |
MIL 13232 | 0.3 | L5 Chondrite | B | A | 26 | |
MIL 13233 | 0.1 | CM2 Chondrite | B | A | 0-2 | |
MIL 13234 | 0.7 | H5 Chondrite | B | A/B | 20 | |
MIL 13235 | 1.5 | LL6 Chondrite | B | A | 29 | 24 |
MIL 13236 | 0.7 | L4 Chondrite | B | A | 25 | 21 |
MIL 13237 | 1.0 | H6 Chondrite | B/C | A | 20 | |
MIL 13238 | 0.4 | LL6 Chondrite | B | A | 28 | |
MIL 13239 | 1.5 | H6 Chondrite | B/C | A | 19 | |
MIL 13240 | 0.9 | LL5 Chondrite | B | A | 30 | |
MIL 13241 | 0.6 | CV3 Chondrite | A/Be | A/B | 1-2 | 6 |
MIL 13242 | 0.8 | H5 Chondrite | A/B | A/B | 19 | |
MIL 13243 | 0.6 | L5 Chondrite | A/B | A | 26 | |
MIL 13244 | 0.2 | H6 Chondrite | A/B | A | 20 | |
MIL 13245 | 0.4 | H6 Chondrite | A/B | A | 20 | |
MIL 13246 | 2.2 | LL5 Chondrite | B | A | 29 | |
MIL 13247 | 5.5 | CK6 Chondrite | B/C | A | 36 | |
MIL 13248 | 5.5 | LL3.5 Chondrite | B | A | 1-37 | 12-19 |
MIL 13249 | 7.1 | H6 Chondrite | B/Ce | A/B | 21 | |
MIL 13250 | 1.5 | L6 Chondrite | C | B | 26 | |
MIL 13251 | 3.8 | L6 Chondrite | B | A/B | 26 | |
MIL 13252 | 2.2 | H6 Chondrite | B/C | B | 20 | |
MIL 13253 | 0.9 | L5 Chondrite | A/B | A/B | 25 | |
MIL 13254 | 1.1 | LL5 Chondrite | A/B | A | 30 | |
MIL 13255 | 0.3 | H5 Chondrite | A/B | A | 20 | |
MIL 13256 | 0.4 | H5 Chondrite | A/B | A | 18 | |
MIL 13257 | 1.8 | H5 Chondrite | B | B | 20 | |
MIL 13258 | 1.0 | L5 Chondrite | A/B | A/B | 25 | |
MIL 13259 | 0.6 | LL5 Chondrite | A/B | A | 31 | |
MIL 13260 | 12.4 | LL4 Chondrite | A/B | A/B | 27 | 15-23 |
MIL 13261 | 7.7 | L6 Chondrite | B/C | B | 25 | |
MIL 13262 | 4.1 | L6 Chondrite | C | A/B | 26 | |
MIL 13264 | 0.6 | LL5 Chondrite | A | A/B | 29 | |
MIL 13265 | 11.5 | H6 Chondrite | A/B | B | 20 | |
MIL 13266 | 3.0 | H6 Chondrite | A/B | A | 20 | |
MIL 13267 | 3.5 | H6 Chondrite | B | A/B | 20 | |
MIL 13268 | 0.8 | LL5 Chondrite | A/B | A | 29 | 24 |
MIL 13269 | 1.2 | CM2 Chondrite | Ae | B/C | 1-47 | 1-12 |
MIL 13270 | 1.9 | H6 Chondrite | B/C | A/B | 20 | |
MIL 13271 | 1.1 | LL5 Chondrite | A/B | A | 28 | |
MIL 13272 | 2.0 | H6 Chondrite | B/C | A | 19 | |
MIL 13273 | 1.4 | L6 Chondrite | B | B | 25 | |
MIL 13274 | 1.0 | H6 Chondrite | A/B | A/B | 21 | |
MIL 13275 | 0.4 | L6 Chondrite | A/B | A/B | 25 | |
MIL 13276 | 2.9 | H5 Chondrite | B | A/B | 19 | |
MIL 13277 | 0.5 | L6 Chondrite | A/B | A/B | 25 | |
MIL 13278 | 2.2 | H6 Chondrite | B/Ce | A | 21 | |
MIL 13279 | 1.2 | LL6 Chondrite | B/C | A/B | 29 | |
MIL 13311 | 24.3 | L4 Chondrite | C | A/B | 24 | 21 |
MIL 13312 | 26.4 | H6 Chondrite | Be | A/B | 20 | 18 |
MIL 13313 | 23.1 | H5 Chondrite | C | A/B | 20 | |
MIL 13314 | 10.3 | H6 Chondrite | B | A | 18 | |
MIL 13315 | 1.5 | Eucrite | A | B/C | 26-62 | |
MIL 13316 | 0.9 | CM2 Chondrite | A | B | 1-45 | 2 |
MIL 13320 | 1.4 | CK5 Chondrite | A/B | B | 34 | |
MIL 13321 | 1.8 | CM2 Chondrite | A/Be | B | 1-36 | |
MIL 13322 | 2.6 | CM2 Chondrite | A/Be | B | 2-13 | 2-6 |
MIL 13323 | 3.7 | CK5 Chondrite | B | B | 32 | |
MIL 13324 | 2.3 | CM2 Chondrite | Be | B | 1-38 | |
MIL 13325 | 1.1 | CM1 Chondrite | A/B | A/B | ||
MIL 13326 | 1.8 | CM2 Chondrite | A/B | B | 1-46 | 6 |
MIL 13327 | 0.7 | H5 Chondrite | B/Ce | B | 19 | 17 |
ALH 15575 | 107.6 | H5 Chondrite | B/C | A/B | 19 | 17 |
MIL 15029 | 34.0 | CM2 Chondrite | B | B | 1-69 | 1 |
MIL 15031 | 237.3 | CM2 Chondrite | B | B/C | 1-44 | 23 |
MIL 15081 | 9.1 | CM2 Chondrite | A/B | A | 1-2 | |
MIL 15231 | 4.9 | CM2 Chondrite | B | A/B | 1-42 | |
MIL 15308 | 18.2 | CM2 Chondrite | B/C | B | 1-51 | |
MIL 15328 | 320.6 | CR2 Chondrite | B | B/C | 1-33 | 2-4 |
Classification of the ordinary chondrites in Table 1 & 2 was done by Energy Dispersive Spectroscopic (EDS) methods using a Scanning Electron Microscope (SEM). This can include the analysis of several olivine and pyroxene grains to determine the approximate Fayalite and Ferrosilite values of the silicates, grouping them into H, L or LL chondrites. Petrologic types are determined by optical microscopy and are assigned based on the distinctiveness of chondrule boundaries on broken surfaces of a 1-3 g chip. While this technique is suitable for general characterization and delineation of equilibrated ordinary chondrites, those undertaking detailed study of any meteorite classified by optical methods alone 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) |