Table 1. Newly Classified Antarctic Meteorites
Sample Number | Weight (g) | Classification | Weathering |
Fracturing |
%Fa |
%Fs |
|
---|---|---|---|---|---|---|---|
LAR 12154 | 47.2 | CV3 CHONDRITE | A/B | B | 0-5 | 3 | |
LAR 12247 | 137.4 | CR2 CHONDRITE | A/B | A | 0-30 | 11-17 | |
LAR 12252 | 147.5 | EH3 CHONDRITE | A | A/B | 0-4 | ||
MIL 13013 | 2893.9 | IRON-IAB | B | A | |||
MIL 13043 | 1.0 | CM2 CHONDRITE | B | A | 0-31 | ||
MIL 13056 | 0.5 | EH3 CHONDRITE | B | A | 0-1 | ||
MIL 13067 | 2.5 | CV3 CHONDRITE | B | A/B | 0-8 | 1-7 | |
MIL 13077 | 0.4 | CK5 CHONDRITE | Be | A/B | 30 | 23 | |
MIL 13078 | 5.4 | CM2 CHONDRITE | Be | A/B | 0-44 | ||
MIL 13117 | 0.8 | CV3 CHONDRITE | Be | A/B | 0-19 | 1 | |
MIL 13118 | 0.7 | CV3 CHONDRITE | Be | A/B | 0-30 | 3-14 | |
MIL 13124 | 1.7 | EUCRITE (BRECCIATED) | A | A/B | 26-62 | ||
DOM 14170 | 224.6 | IRON-UNGROUPED | A/B | A | |||
MIL 15052 | 865.4 | IRON-IIIAB | B | A | |||
MIL 15080 | 38.9 | EUCRITE (BRECCIATED) | A | A/B | 48-58 | ||
MIL 15099 | 39.3 | EUCRITE (BRECCIATED) | A | A/B | 26-59 | ||
MIL 15114 | 55.1 | PALLASITE | B | A | 12-13 | ||
MIL 15230 | 30.1 | CV3 CHONDRITE | B | A | 0-27 | 2-5 | |
MIL 15309 | 48.0 | DIOGENITE | A/B | B | 31 | 25 | |
MIL 15380 | 374.2 | EUCRITE (BRECCIATED) | Ae | B | 25-60 | ||
MIL 15381 | 181.0 | CV3 CHONDRITE | B/Ce | B/C | 0-5 | 1-2 | |
LAR 12012 | 1132.2 | H6 CHONDRITE | B/C | A | |||
LAR 12029 | 2889 | H6 CHONDRITE | B | B | |||
LAR 12044 | 296.2 | H5 CHONDRITE | A/B | B | |||
LAR 12045 | 457.7 | H5 CHONDRITE | B/C | B | |||
LAR 12046 | 254.3 | H5 CHONDRITE | B/C | B | |||
LAR 12047 | 355.4 | L5 CHONDRITE | A/B | A/B | |||
LAR 12048 | 363 | H5 CHONDRITE | B | A | |||
LAR 12105 | 35.5 | L6 CHONDRITE | A/B | A | |||
LAR 12107 | 12.4 | H6 CHONDRITE | B | A | |||
LAR 12108 | 10.1 | H6 CHONDRITE | A/B | A | |||
LAR 12109 | 11.7 | H5 CHONDRITE | Be | A | |||
LAR 12127 | 303.7 | H5 CHONDRITE | B/C | B | 18 | 16 | |
LAR 12130 | 182.6 | H5 CHONDRITE | Be | A | |||
LAR 12131 | 260.2 | H6 CHONDRITE | Be | A | |||
LAR 12132 | 282.3 | L6 CHONDRITE | Be | A/B | |||
LAR 12133 | 201.5 | L6 CHONDRITE | A/Be | A | |||
LAR 12134 | 156.4 | H5 CHONDRITE | A/B | A/B | |||
LAR 12135 | 182.3 | L6 CHONDRITE | A/B | A | |||
LAR 12136 | 282.1 | LL6 CHONDRITE | A | A/B | |||
LAR 12137 | 104.3 | H5 CHONDRITE | B | A/B | |||
LAR 12140 | 40.3 | H4 CHONDRITE | A | A | 19 | 16 | |
LAR 12150 | 113.8 | H5 CHONDRITE | B | A | |||
LAR 12151 | 41.5 | H6 CHONDRITE | A/B | A | |||
LAR 12152 | 52 | L6 CHONDRITE | A/B | A | |||
LAR 12153 | 51.6 | H5 CHONDRITE | B/C | A | |||
LAR 12155 | 51.1 | H6 CHONDRITE | B/C | A | |||
LAR 12157 | 34.3 | L6 CHONDRITE | A/B | A | |||
LAR 12158 | 23.1 | H6 CHONDRITE | B | A | |||
LAR 12159 | 47.3 | L6 CHONDRITE | B | A | |||
LAR 12190 | 78 | H5 CHONDRITE | B | A | |||
LAR 12191 | 37.6 | H6 CHONDRITE | B | A | |||
LAR 12192 | 36.6 | H5 CHONDRITE | B | A/B | |||
LAR 12193 | 29 | H6 CHONDRITE | B | A | |||
LAR 12194 | 19 | H6 CHONDRITE | A/B | A | |||
LAR 12197 | 23 | L6 CHONDRITE | A/B | A | |||
LAR 12198 | 20.4 | H6 CHONDRITE | A/Be | B | |||
LAR 12199 | 19.3 | H6 CHONDRITE | B | A | |||
LAR 12205 | 7.9 | H6 CHONDRITE | B/C | A/B | 19 | 17 | |
LAR 12221 | 283.8 | L5 CHONDRITE | A/B | A | |||
LAR 12222 | 372.9 | L5 CHONDRITE | A/Be | A | 24 | 21 | |
LAR 12223 | 378.3 | H6 CHONDRITE | A/Be | A | |||
LAR 12224 | 179.7 | L5 CHONDRITE | Be | B | |||
LAR 12226 | 118.7 | LL5 CHONDRITE | A/Be | B | |||
LAR 12227 | 67.6 | LL5 CHONDRITE | Ae | A | |||
LAR 12228 | 61.1 | L6 CHONDRITE | A/Be | A | |||
LAR 12229 | 63.7 | H6 CHONDRITE | Be | A | |||
LAR 12238 | 25.7 | H5 CHONDRITE | B | A | |||
LAR 12242 | 171.7 | H6 CHONDRITE | B | B/C | |||
LAR 12243 | 175.3 | L5 CHONDRITE | B | A | |||
LAR 12245 | 187.9 | H6 CHONDRITE | B/C | A | |||
LAR 12250 | 104.6 | H6 CHONDRITE | A/B | A/B | |||
LAR 12251 | 156.6 | H6 CHONDRITE | A/B | B | |||
LAR 12253 | 245 | H6 CHONDRITE | A/B | A/B | |||
LAR 12254 | 249.9 | H6 CHONDRITE | B | A | |||
LAR 12270 | 95.1 | H6 CHONDRITE | C | C | |||
LAR 12271 | 96.7 | H5 CHONDRITE | A/B | A/B | |||
LAR 12272 | 63.4 | L5 CHONDRITE | A | A | |||
LAR 12273 | 63.5 | H6 CHONDRITE | B/C | A | |||
LAR 12274 | 57 | LL5 CHONDRITE | B | A | |||
LAR 12275 | 42.2 | H6 CHONDRITE | C | A | |||
LAR 12276 | 39.8 | L6 CHONDRITE | C | B/C | |||
LAR 12277 | 67.8 | H5 CHONDRITE | A/B | A/B | |||
LAR 12278 | 32 | L5 CHONDRITE | B | A/B | |||
LAR 12280 | 29.6 | H5 CHONDRITE | B/C | A | |||
LAR 12281 | 21.8 | L6 CHONDRITE | A/B | A/B | |||
LAR 12282 | 33.4 | L6 CHONDRITE | B/C | A/B | |||
LAR 12284 | 9.6 | H6 CHONDRITE | B/C | A/B | 19 | 17 | |
LAR 12285 | 16.2 | H6 CHONDRITE | B/C | A | |||
LAR 12286 | 43.4 | L5 CHONDRITE | B/C | A/B | |||
LAR 12287 | 17.1 | H5 CHONDRITE | B/C | A/B | |||
LAR 12290 | 21.9 | H6 CHONDRITE | B/C | A | |||
LAR 12291 | 15 | H5 CHONDRITE | B/C | A/B | |||
LAR 12292 | 12 | H6 CHONDRITE | B/C | A | |||
LAR 12293 | 11.1 | H5 CHONDRITE | A/B | A | |||
LAR 12294 | 6.3 | L6 CHONDRITE | B/C | A | |||
LAR 12295 | 4.4 | H6 CHONDRITE | B/C | A | |||
LAR 12296 | 2.2 | L5 CHONDRITE | B/C | A | |||
LAR 12297 | 5.7 | L6 CHONDRITE | B/C | A/B | |||
LAR 12298 | 8.2 | L6 CHONDRITE | B/C | A/B | |||
LAR 12299 | 4.9 | L6 CHONDRITE | B/C | A | |||
LAR 12311 | 9.2 | H6 CHONDRITE | B/C | B | |||
LAR 12312 | 14.5 | L5 CHONDRITE | B/C | A | |||
LAR 12313 | 10.5 | L6 CHONDRITE | A/B | A | |||
LAR 12314 | 4.1 | L6 CHONDRITE | B/C | A | |||
LAR 12315 | 12.9 | L5 CHONDRITE | B/C | A | |||
LAR 12316 | 0.5 | H5 CHONDRITE | B | A | |||
LAR 12317 | 2.3 | H6 CHONDRITE | B/C | A | |||
LAR 12318 | 8.9 | H6 CHONDRITE | B | A/B | |||
LAR 12319 | 12.3 | L6 CHONDRITE | B | A/B | |||
LAR 12322 | 48.2 | L5 CHONDRITE | A/B | A/B | |||
LAR 12323 | 41.7 | L5 CHONDRITE | A/B | A/B | |||
MIL 13009 | 707.2 | L5 CHONDRITE | B | A/B | |||
MIL 13010 | 1375.4 | H6 CHONDRITE | B | B | 19 | 17 | |
MIL 13012 | 1167.7 | L6 CHONDRITE | B | A | |||
MIL 13014 | 1311.9 | LL5 CHONDRITE | C | A | 29 | 24 | |
MIL 13015 | 778.4 | L5 CHONDRITE | B | A | |||
MIL 13016 | 137.4 | H5 CHONDRITE | A | A | |||
MIL 13017 | 232.5 | L6 CHONDRITE | A/Be | A | |||
MIL 13018 | 112 | LL6 CHONDRITE | A | C | 30 | 24 | |
MIL 13020 | 1.8 | LL6 CHONDRITE | B/C | A | |||
MIL 13021 | 6.4 | H6 CHONDRITE | Ce | A/B | |||
MIL 13022 | 6.9 | H5 CHONDRITE | A | A/B | |||
MIL 13023 | 3.5 | LL5 CHONDRITE | A/B | B | 28 | 22 | |
MIL 13024 | 11.5 | LL5 CHONDRITE | A/B | B | 28 | 22 | |
MIL 13025 | 5.3 | L6 CHONDRITE | A | A/B | |||
MIL 13026 | 1.1 | L6 CHONDRITE | C | B | |||
MIL 13027 | 0.8 | H6 CHONDRITE | B | A | |||
MIL 13028 | 2.9 | L6 CHONDRITE | B/C | B | |||
MIL 13029 | 1.9 | H6 CHONDRITE | C | A/B | |||
MIL 13030 | 5.6 | H6 CHONDRITE | B/C | A/B | |||
MIL 13031 | 1.9 | H6 CHONDRITE | B/C | A | |||
MIL 13033 | 1.6 | L5 CHONDRITE | B/C | A | |||
MIL 13035 | 1.9 | H6 CHONDRITE | B/C | A | |||
MIL 13036 | 6.7 | H5 CHONDRITE | B/C | A | |||
MIL 13038 | 5.5 | H6 CHONDRITE | B/C | A | |||
MIL 13040 | 0.4 | LL6 CHONDRITE | B | A | |||
MIL 13041 | 6.3 | L6 CHONDRITE | B/C | A/B | |||
MIL 13042 | 1.3 | H5 CHONDRITE | B/C | A | |||
MIL 13044 | 6.6 | H5 CHONDRITE | B/C | A | |||
MIL 13045 | 2.5 | LL5 CHONDRITE | B/C | A | |||
MIL 13046 | 1.8 | L6 CHONDRITE | B/C | A | |||
MIL 13047 | 5.3 | H5 CHONDRITE | B/C | A/B | |||
MIL 13048 | 3.8 | L5 CHONDRITE | A/B | A/B | |||
MIL 13049 | 9 | L5 CHONDRITE | B | A | |||
MIL 13060 | 5.8 | LL5 CHONDRITE | A/B | A | 28 | 22 | |
MIL 13061 | 8.2 | H6 CHONDRITE | B/C | B/C | |||
MIL 13064 | 1.5 | L6 CHONDRITE | B | A | |||
MIL 13066 | 1 | L6 CHONDRITE | B | A/B | |||
MIL 13068 | 12.3 | H6 CHONDRITE | A/B | A/B | |||
MIL 13069 | 6.3 | L6 CHONDRITE | B/C | A | |||
MIL 13070 | 5.8 | H6 CHONDRITE | Ce | B | |||
MIL 13071 | 12.3 | H6 CHONDRITE | C | A | |||
MIL 13072 | 16.6 | H5 CHONDRITE | C | B/C | |||
MIL 13073 | 46.2 | H6 CHONDRITE | B/C | A/B | |||
MIL 13074 | 30.2 | L6 CHONDRITE | Be | B | |||
MIL 13075 | 96.2 | L5 CHONDRITE | Be | B/C | |||
MIL 13076 | 41.1 | H6 CHONDRITE | Ce | A/B | |||
MIL 13080 | 527.5 | LL5 CHONDRITE | A/Be | B/C | 30 | 24 | |
MIL 13081 | 116.5 | H5 CHONDRITE | C | A/B | |||
MIL 13082 | 215.7 | H5 CHONDRITE | B/C | A/B | |||
MIL 13083 | 411.5 | H6 CHONDRITE | Be | B | |||
MIL 13084 | 211.8 | L6 CHONDRITE | B/C | A | |||
MIL 13085 | 223.7 | L6 CHONDRITE | Be | A/B | |||
MIL 13086 | 225.4 | LL5 CHONDRITE | A/B | A | |||
MIL 13087 | 258 | H6 CHONDRITE | A/Be | B | |||
MIL 13088 | 144.5 | L5 CHONDRITE | A/B | B/C | |||
MIL 13089 | 128.3 | L6 CHONDRITE | B/Ce | A | |||
MIL 13090 | 93.9 | L6 CHONDRITE | B/C | A/B | |||
MIL 13091 | 75.8 | H5 CHONDRITE | B | A | |||
MIL 13092 | 86.4 | L6 CHONDRITE | C | A | |||
MIL 13093 | 96.1 | L5 CHONDRITE | A | A | |||
MIL 13094 | 156.6 | L6 CHONDRITE | B | A/B | |||
MIL 13095 | 60.2 | L6 CHONDRITE | Ce | A | |||
MIL 13096 | 139.8 | L6 CHONDRITE | A | B | |||
MIL 13097 | 76.1 | H5 CHONDRITE | A | A | |||
MIL 13098 | 70.7 | L5 CHONDRITE | B | B | |||
MIL 13099 | 115.8 | L6 CHONDRITE | A/B | A | |||
MIL 13110 | 32.3 | H5 CHONDRITE | Ce | A/B | |||
MIL 13111 | 75.7 | H5 CHONDRITE | C | A | |||
MIL 13113 | 139.9 | L6 CHONDRITE | Be | A | |||
MIL 13114 | 14.4 | L6 CHONDRITE | A/B | B | |||
MIL 13115 | 45 | L5 CHONDRITE | A/Be | A/B | |||
MIL 13120 | 2.3 | LL5 CHONDRITE | A/B | A | 28 | 22 | |
MIL 13121 | 4.1 | H5 CHONDRITE | A/B | A | |||
MIL 13122 | 0.9 | L6 CHONDRITE | B | A | |||
MIL 13123 | 4.5 | H6 CHONDRITE | B/C | A/B | |||
MIL 13125 | 12.3 | H5 CHONDRITE | B/C | A | |||
MIL 13126 | 1.6 | L4 CHONDRITE | B | A | 24 | 19 | |
MIL 13127 | 1.9 | H6 CHONDRITE | B/C | A | |||
MIL 13128 | 0.4 | L6 CHONDRITE | B | A | |||
MIL 13129 | 1.6 | LL5 CHONDRITE | B | A | |||
MIL 13200 | 4.7 | LL5 CHONDRITE | A/B | A/B | |||
MIL 13201 | 6.1 | H6 CHONDRITE | Ce | A | |||
MIL 13203 | 3.4 | LL6 CHONDRITE | B | A/B | |||
MIL 13205 | 6.9 | L6 CHONDRITE | C | A | |||
MIL 13206 | 15.5 | H6 CHONDRITE | B/C | A | |||
MIL 13207 | 14.5 | L6 CHONDRITE | B | A/B | |||
MIL 13208 | 8.4 | L6 CHONDRITE | Be | A | |||
MIL 13209 | 13.2 | H6 CHONDRITE | C | A | |||
MIL 13290 | 3.1 | H6 CHONDRITE | C | A/B | |||
MIL 13291 | 3.2 | L5 CHONDRITE | C | B/C | |||
MIL 13292 | 3.4 | H6 CHONDRITE | Ce | A/B | |||
MIL 13293 | 2.6 | H6 CHONDRITE | C | B | |||
MIL 13294 | 4.6 | H6 CHONDRITE | Ce | A/B | |||
MIL 13295 | 8 | LL4 CHONDRITE | B | A | 28 | 22 | |
MIL 13296 | 3.4 | LL5 CHONDRITE | B | C | 29 | 24 | |
MIL 13297 | 2.1 | LL6 CHONDRITE | C | B/C | |||
MIL 13298 | 2.8 | H5 CHONDRITE | Ce | B | |||
MIL 13299 | 6.6 | H6 CHONDRITE | C | B/C | |||
MIL 13300 | 6 | H6 CHONDRITE | B/C | A | |||
MIL 13301 | 4.7 | L5 CHONDRITE | B/C | A | |||
MIL 13303 | 2.1 | LL5 CHONDRITE | B | A | |||
MIL 13304 | 1.5 | LL5 CHONDRITE | B/C | A | |||
MIL 13305 | 1.2 | LL5 CHONDRITE | B/C | A | |||
MIL 13306 | 0.7 | L6 CHONDRITE | B | A | |||
MIL 13307 | 8.2 | H6 CHONDRITE | B/C | A | |||
MIL 13308 | 18.3 | L6 CHONDRITE | B/C | A | |||
MIL 13309 | 23.3 | LL6 CHONDRITE | B/C | A | |||
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) |