Diogenites
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite
Country
Year found
1999
Mass
25 kg
[Museum Collection]
(1) 48g (2) 41g
This is 1 of 514 approved meteorites classified as Diogenite. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Published in Meteoritical Bulletin, no. 84, MAPS 35, A199-A225 (2000)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite
Country
Year found
2002
Mass
2.77 kg
[Museum Collection]
(1) 2.54g
This is 1 of 514 approved meteorites classified as Diogenite. Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite
Country
Year found
1931
Mass
12 kg
[Museum Collection]
(1) 7.75g
This is 1 of 514 approved meteorites classified as Diogenite. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Search for this meteorite in the Museo Nazionale dell'Antartide database (Siena, Italy): Never published in the Meteoritical Bulletin
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite
Country
Year found
2007
Mass
1023 g
[Museum Collection]
(1) 10.66g
This is 1 of 514 approved meteorites classified as Diogenite. Published in Meteoritical Bulletin, no. 97, MAPS 45, 449-493 (2010)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite
Country
Year found
2008
Mass
4.91 kg
[Museum Collection]
(1) 51g
This is 1 of 514 approved meteorites classified as Diogenite. Published in Meteoritical Bulletin, no. 95, MAPS 44, 429-462 (2009)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite-olivine
Country
Year found
2010
Mass
800 g
[Museum Collection]
(1) 12.26g
This is 1 of 19 approved meteorites classified as Diogenite-olivine. Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite-pm
Country
Year found
2007
Mass
175 g
[Museum Collection]
(1) 18.7g (2) 13.7g (3) 11.3g (4) 2.7g
(5) 2.62g
History: Purchased by Twelker in 2007 September from a Moroccan dealer at the Denver Mineral Show. Petrography: (A. Irving and S. Kuehner, UWS) Very fresh fragmental breccia consisting predominantly of angular diogenitic orthopyroxene grains (up to 2 mm across) plus
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite-pm
Country
Year found
2017
Mass
784 g
[Museum Collection]
(1) 28.0g (2) 4.5g (3) 4.4g (4) 3.9g
History: Purchased by Eric Twelker in May 2017 from a Moroccan dealer. Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral grains and rare pyroxene-chromite symplectite clasts in a sparse matrix. The predominant mineral is low-Ca pyroxene (exhibiting undulose extinction) with subordinate olivine (of several different compositions), chromite, metal, fayalite, and minor (
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite
Country
Year found
2018
Mass
967 g
[Museum Collection]
(1) 13g
History: One stone weighing 967 g was found in Morocco prior to 2018. Blaine Reed purchased the sample from a meteorite dealer while at the 2018 Tucson Gem and Mineral Show. Physical characteristics: The sample has a yellowish-brown exterior with a few small patches of black fusion crust. The sample has yellowish-orange interior that is brecciated and friable. The cut face shows angular-subrounded clasts up to 1.5cm in long dimension. Petrography: Description and classification (A. Love, App): Sample is a breccia composed of diogenitic lithic fragments and coarser grained cataclastic clasts mixed within a comminuted host of similar materials. Lithic clasts are composed of interlocking, orthopyroxenes which share 120º grain boundaries. Orthopyroxenes contain Cpx inclusions and exsolution lamellae (up to 0.5µm) within crystals. Additional minerals are silica polymorphs, hercynitic chromite, FeS, and rare Ni-free iron metal. Orthopyroxenes within some lithic clasts exhibit normal extinction and equilibrium textures. Geochemistry: (A. Love, App) low Ca pyroxene: Fs27.2±0.6Wo1.5±0.1, Fe/Mn=26.6±0.6, n=14; high Ca pyroxene Fs10.5±0.4Wo44.9±0.5, Fe/Mn=22.5±1.1,n=4. Classification: Monomict diogenite breccia. Fe/Mn compositions of pyroxenes indicate this sample is diogenite meteorite. Textures and Fs compositions of pyroxenes indicate this sample is a diogenite. Specimens: Blaine Reed holds the main mass. Two slices weighing 28.13 g and a polished mount are on deposit at App.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite
Country
Year found
2022
Mass
670 g
[Museum Collection]
(1) 5.50g
History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Light grayish rock without fusion crust. Petrography: The meteorite displays an unbrecciated grayish interior and is predominantly composed of up to 5 mm sized interlocking orthopyroxene (56 vol%) and calcic plagioclase (42 vol%) grains with minor Ti-bearing chromite and troilite. Few orthopyroxenes contain blebby augite exsolutions. Geochemistry: low-Ca pyroxene: Fs30.8±0.2Wo3.4±0.4 (Fs30.4-31.2Wo2.6-3.9, FeO/MnO=24-26, n=12); Ca-pyroxene: Fs15.9±0.4Wo39.7±0.4 (Fs15.5-16.6Wo39.1-40.1, FeO/MnO=19-20, n=6); calcic plagioclase: An96.1±0.3 (An96.0-96.5, n=11) Classification: Diogenite (noritic). Anomalous high plagioclase abundance (42 vol%).
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Diogenite-an
Country
Year found
2024
Mass
2 kg
[Museum Collection]
(1) 29.666 g
History: The meteorite was purchased from a meteorite dealer in Libya. Physical characteristics: Light grayish to light greenish stone partly covered with patchy fusion crust. Petrography: Achondrite dominantly composed of a fine-grained lithology with interspersed coarse-grained enclaves. In the fine-grained part patchily zoned pyroxenes and calcic plagioclase are the most abundant mineral phases. Both are often lath-shaped and gradually coarsen radially towards the enclaves which are dominantly composed of blocky up to 4 mm sized low-Ca pyroxene crystals. Many of these large crystals show resorption textures with embayed outlines and are sometimes overgrown by more Ca-rich patchy pyroxene. Olivine is a minor constituent in the fine-grained regions but becomes more abundant and more ferroan towards the coarse-grained areas. In both lithologies olivine often contains trapped melt inclusions and myrmekitic intergrowths of low-Ca pyroxene and troilite. Vesicles are abundant in the fine-grained regions. Minor phases include silica, apatite, chromite, troilite, and FeNi metal. Geochemistry: fine-grained lithology: patchily zoned pyroxene: Fs35.0±14.0Wo10.2±7.9 (Fs20.1-66.0Wo1.0-25.0, FeO/MnO=24-36, n=20); olivine: Fa31.3±0.6 (Fa30.5-32.1, FeO/MnO=44±2, n=10); calcic plagioclase: An90.6±1.5Or0.5±0.2 (An87.3-91.7Or0.3-0.9, n=10); Cr# in chromite: 68.4±3.1, n=5; coarse-grained lithology: olivine: Fa45.1±6.9 (Fa33.9-53.1, FeO/MnO=43±3, n=10); large low Ca-pyroxenes: Fs25.6±0.9Wo2.4±0.5 (Fs24.2-27.1Wo1.4-3.3, FeO/MnO=24-29, n=12); exsolutions in large pyroxenes: Fs28.3±1.0Wo5.5±0.3 (Fs26.4-29.0Wo5.0-5.9, FeO/MnO=25-29, n=6) Classification: Diogenite (anomalous, olivine-bearing). Diogenite based on presence of large low-Ca pyroxene grains, FeO/MnO ratios of pyroxene and olivine, and An-content of plagioclase. Anomalous designation based on dominant fine-grained lithology with abundant patchily zoned pyroxenes.