'The secondary classification of unequilibrated chondrites', by Emmanuel Jacquet, and Béatrice Doisneau
Meteoritics & Planetary Science, vol. 59, #12, pp. 3150–3180 (2024, open access link)
| ACAPULCOITE–LODRANITE CLAN (5 metamorphic subgroups + potential metallic core; after Floss [2000]; Patzer et al. [2003 #1352, 2004]; Lucas et al. [2022]) |
| 1. Primitive Acapulcoites [Se >12–13 ppm] ('AL chondrites') (e.g. ALHA77081, GRA 98028 [highly primitive {~6 vol% chondrules}], GRV 020043 [highly primitive {type 4, ~62 vol% chondrules; photo credit: Li et al.; article 1, 2; abs}], Monument Draw, Y-74063) |
| 2. Typical Acapulcoites [Se ~5–12 ppm] (e.g. Acapulco, ALH 78230, ALHA81261, Dho 125 and pairs, Dho 290, Dho 312, FRO 95029, NWA 1617, NWA 2656 and pairs, NWA 2775, TIL 99002) |
| 3. Transitional Acapulcoites [Se <5 ppm] (e.g. ALHA81187, EET 84302, FRO 93001, GRA 95209, LEW 86220, MAC 041193, NWA 2627) |
| 4. Lodranites [K <200 ppm [degree of plag. extraction], grain size 500+ µm] (e.g. Choteau [pallasitic texture], GRA 95209 [metal-rich], Lodran, MAC 88177, NWA 468 [anom, metal-rich], NWA 2235, NWA 3341, NWA 4448, NWA 4478 [poss pair with NWA 4875], NWA 4529, NWA 4663, NWA 4833, NWA 6685, NWA 8251 [pigeonite lod.], Willcox Playa 010 [highly reduced], Y-983119 [opx-rich cum w/ melt incl; article]) |
| 5. Enriched Acapulcoites [addition of feldspar-rich melt] (e.g. FRO 93001, LEW 86220) |
| Potential Metallic Core (no known example, but affinities to IIAB irons are noted by Schrader et al. [2022; see Choteau page for details]) |
| TISSEMOUMINITES (1 metamorphic subgroup + potential metallic core; after Stephant et al. [2023]; Worsham et al. [2017]) |
| Primitive, type 5/6 (e.g. Dhofar 1222 [~4 vol% chondrules], NWA 090 [abs], NWA 725 [~5 vol% chondrules {article}], NWA 1052/1054, NWA 1058, NWA 1463, NWA 8614 [abs]) Potential Typical and Evolved members not yet identified |
| Metallic Core (tentative genetic link to the IAB complex, sHH/sHL subgroup below) |
| WINONAITES (3 metamorphic subgroups + metallic core; adapted from Floss [2000] and Patzer et al. [2003 #1352, 2004]) |
| 1. Primitive Winonaites (e.g. Mount Morris, NWA 516, Pontlyfni) |
| 2. Typical Winonaites (e.g. Fortuna, GRV 022890, HaH 193, NWA 1457, NWA 4024, NWA 6448, Winona) |
| 3. Evolved Winonaites (e.g. GRV 021663 [olv-rich partial melt residue; article], NWA 2993, Sah 02029 [partial melt residue], Tierra Blanca [partial melt residue]) |
| Metallic Core (genetically linked to the IAB complex, MG/sLL subgroup below) |
| TÉNÉRÉITES (after Agee et al. [2020]) |
| or TAFASSITE CLAN (up to 4 parent bodies; after Ma et al. [2022] and Jiang et al. [2023]) |
| 1. 'Tafassasset Grouplet' ([all PAC] e.g. NWA 3100, NWA 5131, NWA 11561 [partially melted]) |
| 2. 'Main Group' (3 metamorphic divisions) |
| A. T6 (e.g. NWA 3250 [relict chondrules], NWA 11112 [both well-defined and relict chondrules], NWA 2994, NWA 6921, NWA 7317, NWA 7531) |
| B. T7 (e.g. LEW 88763 [Day et al., 2015], NWA 6962 and NWA 7680 duo, NWA 12869) |
| C. T7–melt depletion (e.g. NWA 6901, NWA 8548, NWA 12455) |
| 3. 'NWA 011 Basalt Grouplet' ([all ACHO] e.g. NWA 2400, NWA 2976, NWA 4901, NWA 4587, NWA 5644, NWA 7129, NWA 8545, NWA 13274) |
| 4. 'NWA 6704 Orthopyroxenite Grouplet' ([all ACHO] e.g. NWA 6693, NWA 6926, NWA 10132) |
| ∗An alternative classification scheme by Ma et al. (2022) proposes a group, 'Tafassites', composed of 13 type 6–7+ members, and removes both NWA 011 and NWA 6704 grouplets from inclusion (Fig. S-13 [ε54Cr vs. Δ17O and ε50Ti]).
∗An alternative classification scheme by Jiang et al. (2023) proposes a grouplet composed of NWA 3250, NWA 11112, and NWA 12869, and removes Tafassasset from inclusion (Fig. 5 [triple oxygen isotopes]; Fig. 9 [ε54Cr vs. Δ17O]). One such classification scheme, constructed on the data and concepts put forth in the above two research articles as well as information from diverse literature sources, can be found on the Tafassite Classification page. |
| BRACHINITE CLAN (2 divisions; after Goodrich et al. [2017]) |
| 1. Brachinites (e.g. ALH 84025, Brachina [most primitive], Eagles Nest, EET 99402/7, Hughes 026 [syn: Australia 1], NWA 3151, NWA 4969 and pairs, NWA 4876, NWA 5191 [poss pair to NWA 3151], NWA 5471, NWA 6308, NWA 11756, Reid 013 [a portion under the synonyms Nova 003 and Window Butte], Reid 027) |
| 2. Brachinite-like (e.g. Divnoe, MIL 090206 and pairs, MIL 090340, NWA 595, NWA 1500, NWA 4042, NWA 5400 and pairs, NWA 6112, Zag (b)) |
| UREILITES (4 divisions) |
| 1. Monomict/Unbrecciated/Main Group (4 mineralogical types) |
| A. Olivine-Pigeonite, mantle residue (e.g. DaG 084, DaG 868, Dhofar 979, Haverö, Kenna, Novo Urei, NWA 2624, NWA 7630 [dunitic]; intermediate: e.g. Hajmah (a)) |
| B. Olivine–Orthopyroxene, mantle residue (e.g. EET 87511 and pairs, EET 87517, LEW 85440 and pairs, MET 01085, NWA 11511 [anom, opx-rich, sodic plag-bearing], Y-74659, Y-791538) |
| C. Olivine–Augite, mantle cumulate or paracumulate (2 categories; after Goodrich et al. [2022]) |
| i. Plagioclase-free (e.g. Almahata Sitta #15 [archetypal Hughes-type], ALH 82106 and pairs, Calama 001, EET 96293 and pairs, FRO 90054/93008 [archetypal Hughes-type], FRO 90228 [archetypal Hughes-type], HaH 064, Hughes 009 [archetypal Hughes-type], LEW 88774, META78008, NWA 2895, NWA 3222 [archetypal Hughes-type], NWA 11754 [archetypal Hughes-type], Ramlat as Sahmah 530 [photo courtesy of Marcin Cimala], Y-74130) |
| ii. Plagioclase-bearing (e.g. AhS MS-MU-012 [olv–opx–aug; ~14% plag; archetypal Hughes-type], Hurghada 001 [rare felds. glass; similar to Hughes-type]) |
| 2. Polymict (2 mineralogical types) |
| A. Shallow regolith fragmental breccia (e.g. Almahata Sitta) |
| B. Deep regolith fragmental breccia (e.g. DaG 319 and pairs, EET 83309, Nilpena, North Haig, Reid 016) |
| 3. Trachyandesite (e.g. AhS MS-MU-011, AhS MS-MU-035) |
| 4. Diorite (e.g. NWA 6698 [plutonic cumulate; abs 1, 2, 3], NWA 16789 [likely paired with NWA 6698]) |
| SILICATE INCLUSIONS IN IRONS (Includes silicates from the IAB complex (e.g. Caddo County, Four Corners, Landes), and from groups IIE (e.g. Netshaëvo, Techado, Watson) and IVA (e.g. São João Nepumuceno, Steinbach) |
| UNGROUPED PACS (e.g. Dhofar 500, NWA 7312 [NC super-group; abs 1, 2], QUE 94204, Sah 03500) |
| HOWARDITES (2 subdivisions) |
| 1. Fragmental Breccia (e.g. Luotolax, Old Homestead 001, NWA 1182, NWA 1282~NWA 1664~NWA 1769) |
| 2. Regolith Breccia (e.g. Bholghati, Bununu, EET 87513, GRO 95535, GRO 95602, Jodzie, Kapoeta, LEW 85313, Lohawat, Malvern, MET 00423) |
| EUCRITES (2 subdivisions) |
| 1. Monomict or genomict breccia (2 categories) |
| A. Gabbroic, Cumulate (e.g. Binda [unbr], Moore Co., NWA 1836, NWA 1925, NWA 7035/8661 [unbr, unmeta, vesicular, Na-rich; abs], NWA 11729 [anom, highly ferroan; abs], SaU 493 [anom, hematite-bearing], Serra de Magé, Talampaya, Vissannapeta) |
| B. Basaltic, Noncumulate (4 series; after Gardner and Mittlefehldt [2004]; Yamaguchi et al. [2009]; Irving et al. [2018]) |
| i. Main Group–Nuevo Laredo Trend (e.g. Camel Donga, Igdi, Lakangaon, Nuevo Laredo, NWA 999, NWA 3152, NWA 13355 [anom, pyx-phyric], Sah 02501) |
| ii. Stannern Trend (e.g. Bouvante, LEW 88010, NWA 4523, NWA 7188, NWA 14091, PCA 82501, PCA 91006, Pomozdino, Stannern, Y-74450) |
| iii. Residual (e.g. A-87272, Agoult, DaG 945, NWA 2362) |
| iv. Partial Melt (e.g. NWA 8671 [anom]) |
| 2. Polymict, <10% magnesian orthopyroxenite (e.g. Dho 007, Millbillillie [unbr], NWA 10674 [anom], Padvarninkai, PCA 91006, Sioux County, Smara) |
| DIOGENITES ultramafic composition—olivine+orthopyroxene ≥90 vol% (8 mineralogical types [IUGS]) |
| 1. Orthopyroxenitic (≥90 vol% opx) (e.g. Bilanga, Johnstown, LAP 02216, LEW 88679, MET 00424, NWA 1821, NWA 3106, NWA 3329, QUE 99050, Tatahouine) |
| 2. Olivine–Orthopyroxenitic (opx + 10–40 vol% olv) (e.g. ALHA77256, GRA 98108, LEW 88679, NWA 5312, NWA 5405) |
| 3. Harzburgitic (>40 vol% olv) (e.g. ALHA77256, EETA79002, GRA 98108, LAP 03979, NWA 1459, 1877 and pairs, NWA 4223, NWA 5480, NWA 6157, NWA 7370) |
| 4. Dunitic (≥90 vol% olv) (e.g. MIL 03443, NWA 2968, 12319 [dun/lherz brec]) |
| 5. Noritic (opx + <5 vol% olv + >10 vol% plg) (e.g. NWA 5315, NWA 6928, Wan Zawatin 001/NWA 15118) |
| 6. Anorthositic (opx + <5 vol% olv + >90 vol% plg) (e.g. Wan Zawatin 001/NWA 15118) |
| 7. Polymict (dun ± harz ± opx ± euc (<10 vol%) (e.g. ALH 85015, LEW 88008, NWA 1239, NWA 1648, NWA 4473, NWA 6945 [w/ noritic clasts]) |
| 8. Genomict (all clasts fractionally related) (e.g. EETA79002) |
| TRANSITIONAL diogenites/magnesian cumulate eucrites (e.g. MIL 07003, QUE 93009, Yamato Type B diogenites) |
| SHERGOTTITES (4 subdivisions) |
| 1. Aphyric (4 subdivisions) |
| A. fine-intergranular (e.g. Dhofar 378, NWA 856, NWA 1669, NWA 8159 [augite-rich; poss launch pair to NWA 7635 and NWA 16895 {abs}], Zagami) |
| B. diabasic (e.g. Los Angeles, NWA 480/1460, NWA 6963 [pyx cum], NWA 14047, NWA 15917, Shergotty) |
| C. microgabbroic (e.g. NWA 7032, NWA 13467 [augite-rich; abs 1, 2], NWA 16289) |
| D. gabbroic (e.g. NWA 7320 [plag cum], NWA 11509, NWA 13227 [olv–gab, trans to poik; abs], NWA 16403, Taoudenni 002) |
| 2. Porphyritic (4 subdivisions) |
| A. olivine-phyric (e.g. Dhofar 019, NWA 1068, NWA 5789, NWA 12536, NWA 14770, NWA 15156) |
| B. olivine-orthopyroxene-phyric (e.g. DaG 476, NWA 1195, NWA 2046) |
| C. pyroxene-phyric (e.g. NWA 10414 [pigeonite], Teghaza 001 [pigeonite]) |
| D. olivine-plagioclase-phyric (e.g. NWA 7635 [photo; poss launch pair to NWA 8159 and NWA 16895 {abs}]) |
| 3. Poikilitic (formerly lherzolitic, bimodal gabbroic intrusive; 2 subdivisions) |
| A. Pyroxene-oikocrystic (e.g. ALHA77005, LEW 88516, NWA 1950, NWA 4797, NWA 7397, NWA 10961 [photo courtesy of Ben Hoefnagels], NWA 12241, RBT 04261/2, Y-793605, Y-984028 [reg brec]) |
| B. B. Plagioclase–olivine–clinopyroxenite (e.g. NWA 2646) |
| 4. Phaneritic (e.g. ALH 84001 [orthopyroxenite]) |
| ∗An alternative Geochemical Classification Schemes for martian shergottites based on elemental, isotopic, and other trends |
| NAKHLITES (2 subdivisions) |
| 1. Clinopyroxenites (e.g. Caleta el Cobre 022, Governador Valadares, Hassi Messauod 001, Lafayette, MIL 03346 and pairs, Nakhla, NWA 998, NWA 5790/6148, NWA 12542 [photo courtesy of Ben Hoefnagels], Y-000593/749/802 [may not all be paired]) |
| 2. Dunites (chassignites) (e.g. Chassigny, NWA 2737, NWA 8694) |
| POLYMICT REGOLITH BRECCIA (e.g. NWA 7034 [alkali-rich]) |
| VESICULAR MELT ROCK (e.g. NWA 16272 ["Vulcan"]) |
|
|
| 1. FELDSPATHIC (5 [or more] lithological types) |
| a. Regolith breccia (e.g. DaG 262) |
| b. Fragmental breccia (e.g. Dho 081) |
| c. Impact-melt breccia (e.g. Dho 302 and pairs, NWA 482, NWA 12971 [troctolitic melt rock]) |
| d. Granulitic breccia (e.g. Dhofar 026, Dhofar 733, NWA 4483 and pairs, NWA 5744) |
| e. Anorthosite (e.g. Gadamis 002/003 [ferroan, cataclastic], Ghadduwah 001 [unbrecciated]) |
| e. Norite (e.g. Arguin 002) |
| 2. MAFIC, Th-RICH, IMPACT-MELT BRECCIAS (e.g. NWA 4472/4485 [KREEP-rich; 6.9 ppm Th], Dhofar 925/960/961/SaU 449 [KREEP components; ~2 ppm Th], SaU 169 [KREEP-rich w/ 13 vol% 2a component; 32.7 ppm Th]) |
| 3. MINGLED BRECCIAS (2 categories) |
| a. Predominantly feldspathic (e.g. Calcalong Creek [25% KREEP-norite; 4.3 ppm Th], Dho 1180 [KREEP clast; 0.9 ppm Th], NWA 2995, SaU 169, Y-983885 [KREEP clasts; 2 ppm Th]) |
| b. Predominantly basaltic (e.g. Apollo 15 & 17 regolith samples, Kalahari 008/009, NWA 773 clan [w/ 1a, 1b, 4, and KREEP-rich components], NWA 3136, QUE 94281) |
| 4. MARE BASALTS (unbrecciated) (e.g. Dho 287 [w/ 5 vol% 1a component], LAP 02205 and pairs, NEA 003, NWA 032/479, NWA 4734, NWA 4898, NWA 12008) |
| ∗'Recommendation of a New Lunar Meteorite Naming Nomenclature', Zeigler et al. (2023 #6306): (1) Basalt; (2) Plutonic; (3) Granulitic Breccia; (4) Impact-Melt Breccia; (5) Fragmental Breccia; (6) Regolith Breccia |
| ANGRITES (6 subdivisions, after Tissot et al. [2022], Rider-Stokes et al. [2024, 2025], and others; possibly representing multiple daughter bodies) |
| 1. Hypabyssal-/diabasic-intrusive (e.g., NWA 12004, NWA 12320 [see 5. below], NWA 12879, NWA 12934, NWA 13363) |
| 2. Quenched volcanic (2 compositional fractionation trends): |
| a. Primitive melts "Group 1", ~20–30 kbar (e.g., Asuka 881371/12209 [see 5. below], LEW 87051 [picritic], NWA 1670 [picritic, shocked], NWA 5167, NWA 7812 [picritic], NWA 12774 [picritic], Oued Namous 001 [picritic]) |
| b. Evolved melts "Group 2", ~6–9 kbar (e.g., D'Orbigny, NWA 1296, NWA 7203 [shock metamorphism; Hayashi et al., 2022; Takenouchi et al., 2025; photo courtesy of Labenne Meteorites], Sahara 99555) |
| 3. Intermediate (both zoned olivine and olivine with exsolution lamellae; e.g., NWA 10463, NWA 15507 [abs]) |
| 4. Plutonic-cumulate (e.g., Angra dos Reis [pyroxenitic], Fezzou 002 [abs], LEW 86010, NWA 2999 and 12+ pairs [peridotitic], NWA 4590, NWA 4801, NWA 5379, NWA 8535 [dunitic, youngest crystallization; article; photo courtesy of Habib Naji], NWA 14758 [abs]) |
| 5. Impact-melt rock (Rider-Stokes et al. [2022 #1420, #6101; 2023 a, b]; Zhu et al. [2025 #5248]; e.g., Asuka 881371/12209 [picritic], NWA 12320 [diabasic; Datta et al., 2024; photo, alternate hypotheses]) |
| 6. Multiple angrite parent bodies (Rider-Stokes et al., 2025; e.g., Bir Zar 011 [abs]) |
| AUBRITES/ENSTATITE ACHONDRITES (3 groups/parent bodies; after Zhu et al. [2021, 2022]) |
| 1. Aubrites, main-group (ε54Cr = 0.06 [±0.12]; δ53Cr = 0.24 [±0.03] ‰) (e.g. Aubres, Bishopville, Cumberland Falls, Khor Temiki, LAP 03719, LAR 04316, Larned [anom], Mayo Belwa [IMB], Mount Egerton [anom], Norton County, NWA 1235 [anom], NWA 4537, NWA 4832, NWA 6350 [pair to NWA 5217], NWA 6675, Peña Blanca Spring, Pesyanoe, Ribbeck, Tiglit) |
| 2. E achondrites (ε54Cr = –0.12 [±0.04]; δ53Cr = 0.10 [±0.03] ‰) (e.g. Shallowater) |
| 3. E achondrites, metal-rich (ε54Cr = –0.26 [±0.03]; δ53Cr = –0.03 [±0.03] ‰) (e.g. , Itqiy, MS-MU-019, MS-MU-036, NWA 2526) |
| UNGROUPED ACHONDRITES (e.g. Al Bir Lahlou 001 [norite], Bunburra Rockhole [euc-like, poss rel to A-881394; photo courtesy of Imperial College London], CeC 050 [aff to NWA 7325 and NWA 11119; abs 1, 2], Dhofar 732 [olv–opx], Dhofar 778 [harzburgite], 2], Erg Atouila 001 [albitite: trachyte/syenite; abs 1, 2], Erg Chech 002 [euc-like andesite], GRA 06128/9 [tra-andesite, bra-/R chon-like; abs, article 1, 2, 3, 4], Hassi el Madani 002 [LL/CHA? {troctolite}; abs 1, 2], Ibitira [euc-like], Néma 001 [ACA–LOD-rel; abs], NWA 1240, NWA 1840 [E acho], NWA 2824 [euc-like], NWA 4284 [L-like; abs], NWA 4741, NWA 5517 [poss rel to NWA 7325; abs], NWA 5721 [abs, O-plot], NWA 7325, NWA 7822 [CV-like], NWA 7835 [photo courtesy of Stefan Ralew], NWA 8054 [prob lod-anom; abs, O–Cr plot], NWA 8777, NWA 10519 [E acho, <0.01 wt% Si in metal], NWA 11112, NWA 11119 [andesite, aff to NWA 7325 and CeC 050; photo courtesy of Dr. Carl Agee, abs]; NWA 11187 [ure-like], NWA 11562/12969/14879 [prob ure-anom, most magnesian; abs 1, 2, 3; article], NWA 11575 [LL-like bas-andesite; abs 1, 2, 3], NWA 12264 ['CX' trend; abs; article], NWA 12338 [euc-like], NWA 12758, NWA 13188 [bas-andesite, poss terrene; abs], NWA 13272 [L/LL-like], NWA 13921 [euc-/dio-like melt], NWA 13955 [dio-like vesicular cum], NWA 14500, NWA 15201 [poss terrene/lun bas], NWA 15820 [trachyandesite/monzonite; similar O to ALM-A and NWA 11119, but dissimilar based on radiometric anlys; abs 1, 2 {w/ photo}], NWA 15915 [clinopyroxenite, poss launch-paired w/ NWA 13307, NWA 16555, and KG 022], Pasamonte [euc-like], PCA 82502/91007 [euc-like], Serra Pelada [euc-like]; Tin-Essako 001 [poss metal-rich ure; abs]) |
| A (e.g. Dalgaranga) |
| A1 (e.g. Acfer 265, Barea, Crab Orchard, Mount Padbury, Patwar, QUE 86900 [0/1; abs], Vaca Muerta) |
| A2 (e.g. Clover Springs, NWA 1242, NWA 14599 [2/3], Veramin) |
| A3 (e.g. Emery, Lowicz, Morristown, NWA 1961, NWA 13302) |
| A4 (e.g. Estherville [A3/4], MAC 88102, NWA 13639) |
| B0 (e.g. NWA 1878) |
| B1 (e.g. ALHA77219 and pairs, Chinguetti) |
| B2 (e.g. Catalina 392, NWA 1817, NWA 1979, NWA 6436, NWA 13532 [2/3], NWA 16273 [2/3]) |
| B3 (e.g. Lamont [3/4; article], NWA 8742) |
| B4 (e.g. Bondoc, Mincy) |
| C2 (e.g. JaH 203 and pairs, NWA 1827, NWA 5312) |
| C3 (e.g. NWA 12566 [photo courtesy of Habib Naji], NWA 12860, San Juan 116) |
| 1. Main-group (2 subgroups [after Ali et al., 2018] and subgroup not yet determined) |
| A. high-Δ17O-bearing (ave. –0.166 [±0.014] ‰) (e.g. Acomita, Ahumada, La'gad 002 [anom metal; plessite], Brenham [anom metal; Ge, Ga], Finmarken, Hambleton, Huckitta [anom metal; Ge, Ga, Pt, W, Ir], Imilac, Jay Bird Springs, Marjahlati, Otinapa, Pallasovka, Somervell County, South Bend, Springwater [anom silicates; Fa, P-ol], Sterley [anom silicates], Thumrayt 001) |
| B. low-Δ17O-bearing (ave. –0.220 [±0.009] ‰) (e.g. Brahin [anom silicates; P-ol], Esquel, Fukang, Giroux, Hambleton, Krasnojarsk [anom metal; Co, As, Sb, Ni, Cu], Mount Dyrring, Newport, Seymchan [anom metal; Ir]) |
| *subgroup not yet determined (e.g. Albin, Argonia [anom metal; Ir], Cumulus Ridge 04071 and pairs [anom metal; Au, Ge], Conception Junction [anom metal; Ni, Cu, Co, Ga, As, Ir], Glorieta Mountain [anom metal; Ge, Ga], Jepara, Mineo, Mount Vernon, Omolon [anom metal; kamacite], Pavlodar [anom metal; Au], Phillips County [anom silicates; Fa, FeS, Ni], Rawlinna 001 [anom silicates; Fa, Ni, Co, Cu, P-ol], Sericho, Theil Mountains, Zaisho [anom silicates; Fa, P-ol]) |
| 2. Eagle Station group (poss CK- or CO-related) (e.g. Cold Bay, Eagle Station, Itzawisis, Karavannoe, Oued Bourdim 001, Shengli) |
| Ungrouped/Unique (e.g. Bordj Badji Mokhtar 001 [pyx; poss related to NWA 10019], Choteau [pallasitic lodranite], Gyarub Zangbo [pyx], Hassi el Biod 002 [pyx], Lieksa, Los Vientos 263 [pyx], Milton, NWA 1911 [pyx; duo with Zinder], Mont Tourniat 001 [pyx], NWA 10019 [pyx; poss related to Bordj Badji Mokhtar 001], NWA 16734, Vermillion [pyx; grouplet with Khatgal and Y-8451]) |
| IAB complex (Wasson and Kallemeyn, 2002) |
| 1. main group (e.g. Campo del Cielo, Canyon Diablo, DaG 962, Landes, Odessa) |
| 2. subgroup sLL (e.g. Toluca, Deport, NWA 2311, NWA 8346, RKPA80226, Zagora) |
| 3. subgroup sLM [formerly IIIC] (e.g. Carlton, Lamesa, Maltahöhe, NWA 2680) |
| 4. subgroup sLH [formerly IIID] (e.g. Dayton, |
| 5. subgroup sHL (e.g. Chebankol, Hassi-Jekna, Lonaconing, NWA 2151, NWA 3200/4706/4710, NWA 8348, NWA 11577, Quarat al Hanish) |
| 6. subgroup sHH (e.g. ALHA80104, Garden Head, Gay Gulch, Kofa, Mount Magnet, NWA 4701) |
| 7. Udei Station grouplet (e.g. Caddo County, Four Corners, Udei Station, Zagora) |
| 8. Pitts grouplet (e.g. Colfax, Pitts, Woodbine) |
| 9. "Nordheim Trio" [Rubin and Zhang, 2021] (ALH 77255, Babb's Mill [Blake's Iron], Nordheim) |
| 10. Algarrabo duo (Algarrabo, Livingston [TN]) |
| 11. Mundrabilla duo (Mundrabilla, Waterville) |
| 12. Britstown duo (Britstown, EET 87506) |
| 13. NWA 468 duo (NWA 468, GRV 98003) note: NWA 468 was reclassified as lodranite-anom by Sanborn et al., 2014) |
| 14. Twin City duo (Twin City, Santa Catharina) |
| 15. IAB-related irons (e.g. Georgetown, NWA 4861 [sHL-related], NWA 5804 [ungr], Oktibbeha County) |
| IC (2 grouplets/subgroups; after Tornabene et al. [2020, 2021, 2022]) |
| 1. High Re, Os, and Ir (e.g. Arispe, Mount Dooling, Murnpeowie, Nocoleche [anom; abs, article], Union County, Winburg [anom; abs, article]) |
| 2. Low Re, Os, and Ir (e.g. Bendego, Chihuahua City, Elton [see table S2–S3], Etosha, NWA 2743, Santa Rosa, St. Francois County) |
| IIAB (e.g. Auburn, Carver, Coahuila, Guadalupe y Calvo, MIL 07666, North Chile, Old Woman, Sikhote Alin) |
| IIG (e.g. Bellsbank, Guanaco, La Primitiva, Tombigbee River, Twannberg) see THE BELLSBANK QUINTET: The Consummation of a New Iron Group—IIG |
| IIC (e.g. Ballinoo, Cratheús [1950], Darinskoe, Kumerina, Perryville, Salt River, Unter Mässing, |
| IID (e.g. A 09179, Carbo, Elbogen, Hraschina, Needles, NWA 10224) |
| IIE (2 categories; after McCoy, 1995; Van Roosbroek et al., 2015) |
| 1. With silicate inclusions (2 metamorphic subtypes) |
| A. chondritic/unfractionated (e.g. Garhi Yasin, Mont Dieu [anom Ge; abs], Netshaëvo, RBT 04186, Techado, Watson 001 [evolved, IM], Y-791093 [transitional]) |
| B. differentiated/fractionated (e.g. Colomera, Elga, Kodaikanal, Miles, NWA 5608, Tarahumara, TYR 05181, Weekeroo Station) |
| 2. Without silicate inclusions (e.g. Arlington, Barranca Blanca, EET 83390, Leshan, NWA 6716, Sah 03505, Tobychan, Verkhne Dnieprovsk) |
| IIF (e.g. Balambala, Corowa [anom; article], Del Rio, Dorofeevka, Monahans (1938) [anom; article], NWA 15822, Purmela [anom; article], Repeev Khutor) |
| IIIAB (e.g. IIIA: Cape York, Wabar, Tambo Quemado; IIIAB: Whitecourt) |
| IIIE (e.g. Aletai [anom {article 1, 2} or ung {abs}], Augusto Pestana, Colonia Obrera, Coopertown, Kokstad, Paloduro, Staunton, Willow Creek) |
| IIIF (2 grouplets and related; after Zhang et al. [2022]) |
| 1. Moonbi grouplet (e.g. Moonbi, Cerro del Inca, St. Genevieve County) |
| 2. Clark County grouplet (e.g. Clark County, Nelson County, Oakley (iron)) |
| 3. related (e.g. Binya [anom], |
| IVA (e.g. Bishop Canyon, Descoberto [anom], Gibeon, NWA 5289, Page City, Säo Joäo Nepomuceno [anom], Steinbach [anom]) |
| IVB (e.g. Hoba, Santa Clara) |
| IVC (after Litasov et al., 2017) (e.g. ALH 77255, Alikatnima, Babb's Mill [Blake's], Chinga, Deep Springs, Onello, Shingle Springs) |
| "SULFIDE-IRONS" (e.g. HOW 88403, MET 00428 [H chon], RBT 04162/04299, Sacramento Wash 005 [H chon], Sahara 03505, Sirjan 001 [abs w/ photo]) |
| SOUTH BYRON TRIO (SBT grouplet) (e.g. Babb's Mill (Troost's), Inland Forts (ILD) 83500, South Byron) |
| UNGROUPED IRONS (e.g. NWA 176, Sombrerete, Taza, Willamette) |