PCA 82506 Comparison Table

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rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > ureilite > low shock ureilite > monomict-poikilitic ureilite > PCA 82506

Next meteorite find: QUE 93336 Up: meteorite find, monomict-poikilitic ureilite Previous meteorite find: Old Homestead 001

PCA 82506 comparison table

Subject has shock texture has olivine inclusion has reference has minerology has degree of shock metamorphism has shock stage is an instance of has distinguishing feature has olivine grain characteristic has metamorphism mechanism has likely origin has solidification mechanism has shock diagnostic mineral has olivine composition has olivine shock metamorphism has weather has letter designation has texture has value has total mass of find has matrix composition has characteristic mineral is a kind of has find date has number of find has origin has shock pressure has solidification timescale has plagioclase has pigeonite composition has definition has intergranular boundary has gain size has pyroxene content has petrology has pyroxene inclusion

meteorite find can be severe due to long exposure time to environmental corrosion agents lower because the fall was not witnessed 485755 kg meteorite when the meteorite was found 1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal a meteorite whose fall was not witnessed

monomict-poikilitic ureilite silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine small rounded pyroxene grains (poikilitic) olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) low S2-S3 no chondrules reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal shock metamorphism partial melting residue cooling in deep underground chambers small euhedral graphite crystals can sometimes be distinguished fracturing, undulatory extinction and kink bands AURE large, anhedral olivine and pyroxene grains 9 kg (out of date) carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume olivine-pigeonite about 90% by volume low shock ureilite 6 (out of date) asteroid less than 20 GPa very slow 0 % curved meeting in triple junctions 1 mm coarse-grained granular small rounded olivine grains (poikilitic)

PCA 82506 silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine small rounded pyroxene grains (poikilitic) Goodrich et al. (1987b), Berkley (1986) olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) low S2-S3 meteorite find no chondrules reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal shock metamorphism partial melting residue cooling in deep underground chambers small euhedral graphite crystals can sometimes be distinguished Fo% 78 fracturing, undulatory extinction and kink bands can be severe due to long exposure time to environmental corrosion agents AURE large, anhedral olivine and pyroxene grains lower because the fall was not witnessed 485755 kg carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume olivine-pigeonite about 90% by volume when the meteorite was found 1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal less than 20 GPa very slow 0 % Wo% 6.0 En% 76 curved meeting in triple junctions 1 mm 0.48 in modal pyroxene/(pryroxene+olivine) coarse-grained granular small rounded olivine grains (poikilitic)

Next meteorite find: QUE 93336 Up: meteorite find, monomict-poikilitic ureilite Previous meteorite find: Old Homestead 001

Subject	has shock texture	has olivine inclusion	has reference	has minerology	has degree of shock metamorphism	has shock stage	is an instance of	has distinguishing feature	has olivine grain characteristic	has metamorphism mechanism	has likely origin	has solidification mechanism	has shock diagnostic mineral	has olivine composition	has olivine shock metamorphism	has weather	has letter designation	has texture	has value	has total mass of find	has matrix composition	has characteristic mineral	is a kind of	has find date	has number of find	has origin	has shock pressure	has solidification timescale	has plagioclase	has pigeonite composition	has definition	has intergranular boundary	has gain size	has pyroxene content	has petrology	has pyroxene inclusion
meteorite find																can be severe due to long exposure time to environmental corrosion agents			lower because the fall was not witnessed	485755 kg			meteorite	when the meteorite was found	1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal					a meteorite whose fall was not witnessed
monomict-poikilitic ureilite	silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine	small rounded pyroxene grains (poikilitic)		olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)	low	S2-S3		no chondrules	reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal	shock metamorphism	partial melting residue	cooling in deep underground chambers	small euhedral graphite crystals can sometimes be distinguished		fracturing, undulatory extinction and kink bands		AURE	large, anhedral olivine and pyroxene grains		9 kg (out of date)	carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume	olivine-pigeonite about 90% by volume	low shock ureilite		6 (out of date)	asteroid	less than 20 GPa	very slow	0 %			curved meeting in triple junctions	1 mm		coarse-grained granular	small rounded olivine grains (poikilitic)
PCA 82506	silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine	small rounded pyroxene grains (poikilitic)	Goodrich et al. (1987b), Berkley (1986)	olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)	low	S2-S3	meteorite find	no chondrules	reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal	shock metamorphism	partial melting residue	cooling in deep underground chambers	small euhedral graphite crystals can sometimes be distinguished	Fo% 78	fracturing, undulatory extinction and kink bands	can be severe due to long exposure time to environmental corrosion agents	AURE	large, anhedral olivine and pyroxene grains	lower because the fall was not witnessed	485755 kg	carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume	olivine-pigeonite about 90% by volume		when the meteorite was found	1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal	less than 20 GPa	very slow	0 %	Wo% 6.0 En% 76		curved meeting in triple junctions	1 mm	0.48 in modal pyroxene/(pryroxene+olivine)	coarse-grained granular	small rounded olivine grains (poikilitic)