EET 87511 Comparison Table

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rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > ureilite > bi-modal ureilite > EET 87511

Next bi-modal ureilite: HaH 064 Up: bi-modal ureilite, low shock ureilite, meteorite find Previous bi-modal ureilite: ALH 82106

EET 87511 comparison table

Subject is paired with has shock texture has weather resistance has reference has minerology has degree of shock metamorphism has shock stage is an instance of has distinguishing feature has orthopyroxene composition has fragmentation probability 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 relative abundance has texture has value has total mass of find has matrix composition has characteristic mineral has composition is a kind of has find date has augite composition has number of find has origin has ablative mass loss has shock pressure has solidification timescale has definition has petrology

bi-modal ureilite low olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) no chondrules high because it is more friable than iron meteorite reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal partial melting residue cooling in deep underground chambers AURE 7.1 % of meteorite falls bi-modal with extremely large 15mm crystals of low-Ca pyroxene poikilitically enclosing domains with ureilite texture 9 kg (out of date) carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume olivine-pigeonite about 90% by volume silicates (with very few exceptions) ureilite 6 (out of date) asteroid high because it is more friable than iron meteorite very slow coarse-grained granular

low shock ureilite silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine which depends on its composition olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) low S2-S3 no chondrules during meteor phase which depends on composition 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 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 often minerals not found on Earth S3 shock stage meteorite 6 (out of date) asteroid directly proportional to initial velocity less than 20 GPa very slow coarse-grained granular

meteorite find which depends on its composition during meteor phase which depends on composition can be severe due to long exposure time to environmental corrosion agents lower because the fall was not witnessed 485755 kg often minerals not found on Earth meteorite when the meteorite was found 1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal directly proportional to initial velocity a meteorite whose fall was not witnessed

EET 87511 EET 87717 meteorite silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine which depends on its composition Berkley (1990), AMN 11-2 olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) low S2-S3 meteorite find no chondrules Wo% 4.5 En% 82 during meteor phase which depends on composition 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% 85 fracturing, undulatory extinction and kink bands can be severe due to long exposure time to environmental corrosion agents AURE bi-modal with extremely large 15mm crystals of low-Ca pyroxene poikilitically enclosing domains with ureilite texture 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 often minerals not found on Earth when the meteorite was found Wo% 36 En% 55 1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal directly proportional to initial velocity less than 20 GPa very slow coarse-grained granular

Next bi-modal ureilite: HaH 064 Up: bi-modal ureilite, low shock ureilite, meteorite find Previous bi-modal ureilite: ALH 82106

Subject	is paired with	has shock texture	has weather resistance	has reference	has minerology	has degree of shock metamorphism	has shock stage	is an instance of	has distinguishing feature	has orthopyroxene composition	has fragmentation probability	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 relative abundance	has texture	has value	has total mass of find	has matrix composition	has characteristic mineral	has composition	is a kind of	has find date	has augite composition	has number of find	has origin	has ablative mass loss	has shock pressure	has solidification timescale	has definition	has petrology
bi-modal ureilite			low		olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)				no chondrules		high because it is more friable than iron meteorite	reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal		partial melting residue	cooling in deep underground chambers					AURE	7.1 % of meteorite falls	bi-modal with extremely large 15mm crystals of low-Ca pyroxene poikilitically enclosing domains with ureilite texture		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	silicates (with very few exceptions)	ureilite			6 (out of date)	asteroid	high because it is more friable than iron meteorite		very slow		coarse-grained granular
low shock ureilite		silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine	which depends on its composition		olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)	low	S2-S3		no chondrules		during meteor phase which depends on composition	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				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	often minerals not found on Earth	S3 shock stage meteorite			6 (out of date)	asteroid	directly proportional to initial velocity	less than 20 GPa	very slow		coarse-grained granular
meteorite find			which depends on its composition								during meteor phase which depends on composition								can be severe due to long exposure time to environmental corrosion agents				lower because the fall was not witnessed	485755 kg			often minerals not found on Earth	meteorite	when the meteorite was found		1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal	directly proportional to initial velocity			a meteorite whose fall was not witnessed
EET 87511	EET 87717 meteorite	silicates show minor fracturing, undulatory extinction and kink bands primarily in olivine	which depends on its composition	Berkley (1990), AMN 11-2	olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)	low	S2-S3	meteorite find	no chondrules	Wo% 4.5 En% 82	during meteor phase which depends on composition	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% 85	fracturing, undulatory extinction and kink bands	can be severe due to long exposure time to environmental corrosion agents	AURE		bi-modal with extremely large 15mm crystals of low-Ca pyroxene poikilitically enclosing domains with ureilite texture	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	often minerals not found on Earth		when the meteorite was found	Wo% 36 En% 55	1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal	directly proportional to initial velocity	less than 20 GPa	very slow		coarse-grained granular