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Subdivision of meteorites
Primitive achondrites are a subdivision of meteorites. They are classified on the same rank (historically called "Class") and lying between chondrites
Primitive_achondrite
Stony meteorite that does not contain chondrules
body. Achondrites are classified into the following groups: Primitive achondrites Asteroidal achondrites Lunar meteorites Martian meteorites Primitive achondrites
Achondrite
of the IAB group/complex. IAB meteorite – an iron meteorite and primitive achondrite of the IAB group/complex. IB meteorite – an iron meteorite group
Glossary_of_meteoritics
Rare type of stony meteorite
temperatures reached in the explosion of about 1000 °C. Ureilites are achondrite meteorites rich in olivine and pigeonite. Ureilites can be divided into
Ureilite
Systems of grouping meteorites based on shared characteristics
follows: Chondrites Primitive achondrites Achondrites where irons and stony–irons are considered to be achondrites or primitive achondrites, depending on the
Meteorite_classification
Type of meteorites
Lodranites are a small group of primitive achondrite meteorites that consists of meteoric iron and silicate minerals. Olivine and pyroxene make up most
Lodranite
Group of meteorites
either as primitive achondrites or as asteroidal achondrites. Like all primitive achondrites, they have similarities with chondrites and achondrites. Brachinites
Brachinite
Meteorite found in the United States
The Winona meteorite is a primitive achondrite meteorite. It is the type specimen and by far the largest meteorite of the winonaite group. The Winona meteorite
Winona_meteorite
Meteorite found in Sweden
chondrites, while oxygen isotopes are similar to those in some rare primitive achondrites. Österplana 065 also features a chromium-spinel–rutile assemblage
Österplana_065
Deprecated term formerly used in meteoritics
partial melting and impact events and are grouped with the primitive achondrites and the achondrites. Iron meteorites are derived from planetary cores of asteroids
Nonmagmatic_meteorite
Group of the primitive achondrite class of meteorites
Acapulcoites are a group of the primitive achondrite class of stony meteorites. The acapulcoites are named after the only specimen of the group that was
Acapulcoite
Group of primitive achondrite meteorites
a group of primitive achondrite meteorites. Like all primitive achondrites, winonaites share similarities with chondrites and achondrites. They show signs
Winonaite
Group of primitive achondrites
IIICD meteorites are a group of primitive achondrites. They are classified in a clan together with the IAB meteorites and the winonaites. IIICD meteorites
IIICD_meteorite
Group of iron meteorites
meteorites according to their overall composition and a group of primitive achondrites because of silicate inclusions that show a strong affinity to winonaites
IAB_meteorite
Meteorite found in Australia
meteorite is the type specimen of the brachinites class of the asteroidal achondrites. The meteorite is named after Brachina in South Australia. Two fragments
Brachina_meteorite
Class of stony meteorites made of round grains
of melting occur the meteorite would probably be classified as a primitive achondrite instead of a chondrite. All groups of ordinary and enstatite chondrites
Chondrite
Meteoroid that survives Earth's atmosphere
chrome-spinels, retrieved from micrometeorites in acid baths has shown that primitive achondrites, which represent less than half a percent of the MM reaching Earth
Micrometeorite
Type of igneous rock
Variolite Wad Non-terrestrial rocks (meteorites) Achondrite Primitive achondrite Asteroidal achondrite Lunar meteorite Martian meteorite Chondrite Carbonaceous
Teschenite
Main-belt asteroid
an S-type in the Tholen classification system, and is similar to primitive achondrite meteorites. Measurements of the thermal inertia of 32 Pomona give
32_Pomona
Japanese American chemist
N., Clayton, R.; K., Mayeda, T. (July 1992). "Brachinites: A New Primitive Achondrite Group". Meteoritics. 27 (3): 267. Bibcode:1992Metic..27R.267N. ISSN 0026-1114
Toshiko_Mayeda
Canadian-American chemist and academic
N., Clayton, R.; K., Mayeda, T. (July 1992). "Brachinites: A New Primitive Achondrite Group". Meteoritics. 27 (3): 267. Bibcode:1992Metic..27R.267N. ISSN 0026-1114
Robert_N._Clayton
Group of meteorites
and are often called enstatite achondrites. Their igneous origin separates them from primitive enstatite achondrites and means they originated in an
Aubrite
Main-belt asteroid
(silicate) in the Tholen classification system, and is similar to primitive achondrite meteorites. Photometric observations at the Organ Mesa Observatory
40_Harmonia
Ultramafic rock
M. K. Weisberg; M. Ebihara; R. N. Clayton; T. K. Mayeda (1992). "Brachinites: A New Primitive Achondrite Group". Meteoritics. 27 (3): 267. v t e v t e
Wehrlite
Meteorite found in Western Sahara
should be called "primitive enstatite achondrites". Glossary of meteoritics Keil, Klaus (31 December 2009). "Enstatite achondrite meteorites (aubrites)
Itqiy_meteorite
Academic journal
CV C ungrouped Enstatite EH EL Kakangari Ordinary H L LL Rumuruti Achondrite Primitive Acapulcoite Brachinite IAB IIICD Lodranite Ureilite Winonaite Asteroidal
Geochimica et Cosmochimica Acta
Geochimica_et_Cosmochimica_Acta
Meteorite found in Poland
proposed that the Zakłodzie meteorite should be classified as a "primitive enstatite achondrite". It was classified as an Aubrite-an (anomalous) in 2006. Currently
Zaklodzie_meteorite
Phosphide mineral
CV C ungrouped Enstatite EH EL Kakangari Ordinary H L LL Rumuruti Achondrite Primitive Acapulcoite Brachinite IAB IIICD Lodranite Ureilite Winonaite Asteroidal
Allabogdanite
Meteorite found in Antarctica
alteration. The Martian meteorite is an igneous rock classified as an achondrite type of the nakhlite group. Allan Hills 84001 Astrobiology Glossary of
Yamato_000593
Type of igneous rock
to terrestrial lherzolite rocks, these specimens are coarse-grained, primitive magmatic rocks that originated deep within the subsurface of Mars. They
Lherzolite
Academic journal
CV C ungrouped Enstatite EH EL Kakangari Ordinary H L LL Rumuruti Achondrite Primitive Acapulcoite Brachinite IAB IIICD Lodranite Ureilite Winonaite Asteroidal
Meteoritics & Planetary Science
Meteoritics_&_Planetary_Science
Meteorite composed of iron-nickel alloy called meteoric iron
S. (2010). "Differentiation of Vesta and the parent bodies of other achondrites". J. Geophys. Res. Planets. 115 (E8). Bibcode:2010JGRE..115.8001G. doi:10
Iron_meteorite
Group of chondrites with low iron and low metal content
stage between chondrites and achondrites and to name them amphoterites. We know now that LL chondrites and achondrites are quite different, so this name
LL_chondrite
Award
CV C ungrouped Enstatite EH EL Kakangari Ordinary H L LL Rumuruti Achondrite Primitive Acapulcoite Brachinite IAB IIICD Lodranite Ureilite Winonaite Asteroidal
Nier_Prize
Class of chondritic meteorites
known groups and many ungrouped meteorites. They include some of the most primitive known meteorites. The C chondrites represent only a small proportion (4
Carbonaceous_chondrite
Coarse-grained ultramafic igneous rock
rather than bulk upper mantle material. Northwest Africa 12217: A dunitic achondrite consisting of 93% olivine that exists as a monomict fragmental impact
Peridotite
Martian meteorite discovered in Antarctica in 1984
out that "morphology alone cannot be used unambiguously as a tool for primitive life detection." Interpretation of morphology is notoriously subjective
Allan_Hills_84001
Solid debris from outer space that hits a planetary surface
into a thin fusion crust, which on most meteorites is black (on some achondrites, the fusion crust may be very light-colored). On stony meteorites, the
Meteorite
Australian network of meteoroid tracking cameras
composition of the inner core of Earth can be based on these rocks. Highly primitive meteorites contain some of the first solids to have formed in the Solar
Desert_Fireball_Network
Scientific dating of the Earth
the date. Some meteorites are furthermore considered to represent the primitive material from which the accreting solar disk was formed. Some have behaved
Age_of_Earth
Water and its precursors in asteroids
Mittelfehldt D (1996). "Mineralogy of carbonaceous chondrite clasts in HED achondrites and the moon". Meteoritics & Planetary Science. 31 (4): 518–537. Bibcode:1996M&PS
Asteroidal_water
Meteorites with high levels of primordial gases
(1975). "Electron petrography of shock effects in a gas-rich enstatite-achondrite". Contributions to Mineralogy and Petrology. 49 (2): 149–62. Bibcode:1975CoMP
Gas-rich_meteorites
Scientific hypothesis that life originated from formamide precursors
of meteoritic origin encompassing iron, stony-iron, chondrites, and achondrites meteorites. Various energy sources, including thermal energy, UV-radiation
Formamide-based prebiotic chemistry
Formamide-based_prebiotic_chemistry
Science award
Micro-meteorites in Soil Samples 1962–1963 Michael Duke Petrology of the Basaltic Achondrite Meteorites 1962–1963 James L. Setser Determination of the Abundance of
Nininger_Meteorite_Award
Main-belt asteroid
G. (December 1977). "The E asteroids and the origin of the enstatite achondrites". Geochimica et Cosmochimica Acta. 41 (12): 1759–1767. Bibcode:1977GeCoA
44_Nysa
Group of overlapping asteroid families
G. (December 1977). "The E asteroids and the origin of the enstatite achondrites". Geochimica et Cosmochimica Acta. 41 (12): 1759–1767. Bibcode:1977GeCoA
Nysa–Polana_complex
NASA orbiter mission to asteroid Vesta and dwarf planet Ceres (2007–2018)
S. (2010). "Differentiation of Vesta and the parent bodies of other achondrites". J. Geophys. Res. Planets. 115 (E8): E08001. Bibcode:2010JGRE..115.8001G
Dawn_(spacecraft)
Group of meteorites
Mittlefehldt, D (Jul 1996). "Mineralogy of carbonaceous chondrite clasts in HED achondrites and the Moon". Meteoritics & Planetary Science. 31 (4): 518–37. Bibcode:1996M&PS
CM_chondrite
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