anhydrous chondrite Comparison Table

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anhydrous chondrite comparison table

Subject has oxidized iron content has weather resistance has metal abundance has alteration temperature range has refractory inclusion abundance has olivine and low Ca pyroxene homogeneity has distinguishing feature has part feldspar has fragmentation probability has metamorphism mechanism has degree of secondary process has chondrule glass type has chondrule abundance has relative abundance has degree of aqueous alteration has part chondrule has abundance has prototype has oxidation state has total mass of find has structural state of low Ca pyroxene has degree of thermal metamorphism has part matrix has matrix abundance has part carbon has petrologic type has part maximum bulk Ni in metal has composition is a kind of has part water has number of find has ablative mass loss has synonym has chondrule mean diameter has part sulfide Ni content

CK chondrite low 0.01 % by volume 4 % by volume elemental carbon usually plagioclase tectosilicate high because it is more friable than iron meteorite 15 % by volume 8 % of meteorite falls small sphere of about 1 mm diameter of formerly melted minerals rare relative to other chondrite types ??? meteorite 2577 kg definition goes here fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents 75 % by volume in weight % 3 to 6 often minerals not found on Earth anhydrous chondrite 0 % by weight (approximately) 36 high because it is more friable than iron meteorite 0.7 millimeters

enstatite chondrite zero which depends on its composition in volume % in volume % usually plagioclase tectosilicate during meteor phase which depends on composition in volume % small sphere of about 1 mm diameter of formerly melted minerals highly reduced with very little FeO 234 kg definition goes here fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents in volume % in weight % often minerals not found on Earth highly reduced meteorite 0 % by weight (approximately) 16 directly proportional to initial velocity E chondrite millimeters

ordinary chondrite low in volume % in volume % usually plagioclase tectosilicate high because it is more friable than iron meteorite in volume % 85.7 % of meteorite falls small sphere of about 1 mm diameter of formerly melted minerals most common chondrite observed from falls 20461 kg definition goes here fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents in volume % in weight % 3 to 6 often minerals not found on Earth anhydrous chondrite 0 % by weight (approximately) 1030 high because it is more friable than iron meteorite O chondrite millimeters

R chondrite low 0.1 % by volume 0 % by volume usually plagioclase tectosilicate high because it is more friable than iron meteorite greater than 40 % by volume 85.7 % of meteorite falls small sphere of about 1 mm diameter of formerly melted minerals Rumuruti meteorite highly oxidized 20461 kg definition goes here fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents 36 % by volume in weight % 3 to 6 enriched in ¹⁷O isotope anhydrous chondrite 0 % by weight (approximately) 1030 high because it is more friable than iron meteorite rumurutiite 0.4 millimeters

type 3 chondrite low in volume % in volume % greater than 5 % deviations minor primary grains only high because it is more friable than iron meteorite clear, isotropic, variable abundance in volume % 85.7 % of meteorite falls none chondrules very sharply defined 20461 kg predominantly monoclinic none clastic and minor opaque in volume % 0.2 to 1 % by weight 3 greater than 20 % by weight, kamacite and taenite in exsolution relationship often minerals not found on Earth anhydrous chondrite 0.3 to 3 % by weight 1030 high because it is more friable than iron meteorite millimeters less than 0.5 % by weight

type 4 chondrite low in volume % the range over at which the alteration took place in volume % less than 5 % mean deviations secondary, grains than 2 microns high because it is more friable than iron meteorite thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent in volume % 85.7 % of meteorite falls chondrules well defined 20461 kg greater than 20 % monoclinic weak transparent, recrystallized, small crystals in volume % less than 0.2 % by weight 4 greater than 20 % by weight, kamacite and taenite in exsolution relationship often minerals not found on Earth anhydrous chondrite less than 1.5 % by weight 1030 high because it is more friable than iron meteorite millimeters less than 0.5 % by weight

type 5 chondrite low in volume % the range over at which the alteration took place in volume % homogeneous secondary, 2 to 50 micron grains high because it is more friable than iron meteorite thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent in volume % 85.7 % of meteorite falls chondrules readily delineated 20461 kg less than 20 % monoclinic moderate transparent, recrystallized, moderate size crystals in volume % less than 0.2 % by weight 5 greater than 20 % by weight, kamacite and taenite in exsolution relationship often minerals not found on Earth anhydrous chondrite less than 1.5 % by weight 1030 high because it is more friable than iron meteorite millimeters less than 0.5 % by weight

type 6 chondrite low in volume % the range over at which the alteration took place in volume % homogeneous secondary, grains greater than 50 microns high because it is more friable than iron meteorite thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent in volume % 85.7 % of meteorite falls chondrules poorly defined 20461 kg orthorhombic strong transparent, recrystallized, coarse crystals in volume % less than 0.2 % by weight 6 greater than 20 % by weight, kamacite and taenite in exsolution relationship often minerals not found on Earth anhydrous chondrite less than 1.5 % by weight 1030 high because it is more friable than iron meteorite millimeters less than 0.5 % by weight

Next chondrite: carbonaceous chondrite Up: chondrite Previous chondrite: altered chondrite

Subject	has oxidized iron content	has weather resistance	has metal abundance	has alteration temperature range	has refractory inclusion abundance	has olivine and low Ca pyroxene homogeneity	has distinguishing feature	has part feldspar	has fragmentation probability	has metamorphism mechanism	has degree of secondary process	has chondrule glass type	has chondrule abundance	has relative abundance	has degree of aqueous alteration	has part chondrule	has abundance	has prototype	has oxidation state	has total mass of find	has structural state of low Ca pyroxene	has degree of thermal metamorphism	has part matrix	has matrix abundance	has part carbon	has petrologic type	has part maximum bulk Ni in metal	has composition	is a kind of	has part water	has number of find	has ablative mass loss	has synonym	has chondrule mean diameter	has part sulfide Ni content
CK chondrite		low	0.01 % by volume		4 % by volume		elemental carbon	usually plagioclase tectosilicate	high because it is more friable than iron meteorite				15 % by volume	8 % of meteorite falls		small sphere of about 1 mm diameter of formerly melted minerals	rare relative to other chondrite types	??? meteorite		2577 kg	definition goes here		fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents	75 % by volume	in weight %	3 to 6		often minerals not found on Earth	anhydrous chondrite	0 % by weight (approximately)	36	high because it is more friable than iron meteorite		0.7 millimeters
enstatite chondrite	zero	which depends on its composition	in volume %		in volume %			usually plagioclase tectosilicate	during meteor phase which depends on composition				in volume %			small sphere of about 1 mm diameter of formerly melted minerals			highly reduced with very little FeO	234 kg	definition goes here		fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents	in volume %	in weight %			often minerals not found on Earth	highly reduced meteorite	0 % by weight (approximately)	16	directly proportional to initial velocity	E chondrite	millimeters
ordinary chondrite		low	in volume %		in volume %			usually plagioclase tectosilicate	high because it is more friable than iron meteorite				in volume %	85.7 % of meteorite falls		small sphere of about 1 mm diameter of formerly melted minerals	most common chondrite observed from falls			20461 kg	definition goes here		fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents	in volume %	in weight %	3 to 6		often minerals not found on Earth	anhydrous chondrite	0 % by weight (approximately)	1030	high because it is more friable than iron meteorite	O chondrite	millimeters
R chondrite		low	0.1 % by volume		0 % by volume			usually plagioclase tectosilicate	high because it is more friable than iron meteorite				greater than 40 % by volume	85.7 % of meteorite falls		small sphere of about 1 mm diameter of formerly melted minerals		Rumuruti meteorite	highly oxidized	20461 kg	definition goes here		fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents	36 % by volume	in weight %	3 to 6		enriched in ¹⁷O isotope	anhydrous chondrite	0 % by weight (approximately)	1030	high because it is more friable than iron meteorite	rumurutiite	0.4 millimeters
type 3 chondrite		low	in volume %		in volume %	greater than 5 % deviations		minor primary grains only	high because it is more friable than iron meteorite			clear, isotropic, variable abundance	in volume %	85.7 % of meteorite falls	none	chondrules very sharply defined				20461 kg	predominantly monoclinic	none	clastic and minor opaque	in volume %	0.2 to 1 % by weight	3	greater than 20 % by weight, kamacite and taenite in exsolution relationship	often minerals not found on Earth	anhydrous chondrite	0.3 to 3 % by weight	1030	high because it is more friable than iron meteorite		millimeters	less than 0.5 % by weight
type 4 chondrite		low	in volume %	the range over at which the alteration took place	in volume %	less than 5 % mean deviations		secondary, grains than 2 microns	high because it is more friable than iron meteorite	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	in volume %	85.7 % of meteorite falls		chondrules well defined				20461 kg	greater than 20 % monoclinic	weak	transparent, recrystallized, small crystals	in volume %	less than 0.2 % by weight	4	greater than 20 % by weight, kamacite and taenite in exsolution relationship	often minerals not found on Earth	anhydrous chondrite	less than 1.5 % by weight	1030	high because it is more friable than iron meteorite		millimeters	less than 0.5 % by weight
type 5 chondrite		low	in volume %	the range over at which the alteration took place	in volume %	homogeneous		secondary, 2 to 50 micron grains	high because it is more friable than iron meteorite	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	in volume %	85.7 % of meteorite falls		chondrules readily delineated				20461 kg	less than 20 % monoclinic	moderate	transparent, recrystallized, moderate size crystals	in volume %	less than 0.2 % by weight	5	greater than 20 % by weight, kamacite and taenite in exsolution relationship	often minerals not found on Earth	anhydrous chondrite	less than 1.5 % by weight	1030	high because it is more friable than iron meteorite		millimeters	less than 0.5 % by weight
type 6 chondrite		low	in volume %	the range over at which the alteration took place	in volume %	homogeneous		secondary, grains greater than 50 microns	high because it is more friable than iron meteorite	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	in volume %	85.7 % of meteorite falls		chondrules poorly defined				20461 kg	orthorhombic	strong	transparent, recrystallized, coarse crystals	in volume %	less than 0.2 % by weight	6	greater than 20 % by weight, kamacite and taenite in exsolution relationship	often minerals not found on Earth	anhydrous chondrite	less than 1.5 % by weight	1030	high because it is more friable than iron meteorite		millimeters	less than 0.5 % by weight