EH chondrite Comparison Table

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EH chondrite comparison table

Subject has alteration temperature range is an instance of has olivine and low Ca pyroxene homogeneity has part feldspar has metamorphism mechanism has degree of secondary process has chondrule glass type has part chondrule has degree of aqueous alteration has total mass of find has structural state of low Ca pyroxene has part matrix has degree of thermal metamorphism has part carbon has part maximum bulk Ni in metal is a kind of has part water has number of find has part sulfide Ni content

EH3 chondrite greater than 5 % deviations minor primary grains only clear, isotropic, variable abundance chondrules very sharply defined none 1 kg predominantly monoclinic clastic and minor opaque none 0.2 to 1 % by weight greater than 20 % by weight, kamacite and taenite in exsolution relationship E3 chondrite 0.3 to 3 % by weight 1 less than 0.5 % by weight

EH4 chondrite the range over at which the alteration took place less than 5 % mean deviations secondary, grains than 2 microns thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent chondrules well defined 143 kg greater than 20 % monoclinic transparent, recrystallized, small crystals weak less than 0.2 % by weight greater than 20 % by weight, kamacite and taenite in exsolution relationship E4 chondrite less than 1.5 % by weight 5 less than 0.5 % by weight

EH5 chondrite the range over at which the alteration took place homogeneous secondary, 2 to 50 micron grains thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent chondrules readily delineated 28 kg less than 20 % monoclinic transparent, recrystallized, moderate size crystals moderate less than 0.2 % by weight greater than 20 % by weight, kamacite and taenite in exsolution relationship E5 chondrite less than 1.5 % by weight 2 less than 0.5 % by weight

EH6 chondrite the range over at which the alteration took place homogeneous secondary, grains greater than 50 microns thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent chondrules poorly defined 59 kg orthorhombic transparent, recrystallized, coarse crystals strong less than 0.2 % by weight greater than 20 % by weight, kamacite and taenite in exsolution relationship E6 chondrite less than 1.5 % by weight 8 less than 0.5 % by weight

QUE 94204 EH chondrite usually plagioclase tectosilicate small sphere of about 1 mm diameter of formerly melted minerals 234 kg definition goes here fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents in weight % 0 % by weight (approximately) 16

Y-793225 EH chondrite usually plagioclase tectosilicate small sphere of about 1 mm diameter of formerly melted minerals 234 kg definition goes here fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents in weight % 0 % by weight (approximately) 16

Subject	has alteration temperature range	is an instance of	has olivine and low Ca pyroxene homogeneity	has part feldspar	has metamorphism mechanism	has degree of secondary process	has chondrule glass type	has part chondrule	has degree of aqueous alteration	has total mass of find	has structural state of low Ca pyroxene	has part matrix	has degree of thermal metamorphism	has part carbon	has part maximum bulk Ni in metal	is a kind of	has part water	has number of find	has part sulfide Ni content
EH3 chondrite			greater than 5 % deviations	minor primary grains only			clear, isotropic, variable abundance	chondrules very sharply defined	none	1 kg	predominantly monoclinic	clastic and minor opaque	none	0.2 to 1 % by weight	greater than 20 % by weight, kamacite and taenite in exsolution relationship	E3 chondrite	0.3 to 3 % by weight	1	less than 0.5 % by weight
EH4 chondrite	the range over at which the alteration took place		less than 5 % mean deviations	secondary, grains than 2 microns	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	chondrules well defined		143 kg	greater than 20 % monoclinic	transparent, recrystallized, small crystals	weak	less than 0.2 % by weight	greater than 20 % by weight, kamacite and taenite in exsolution relationship	E4 chondrite	less than 1.5 % by weight	5	less than 0.5 % by weight
EH5 chondrite	the range over at which the alteration took place		homogeneous	secondary, 2 to 50 micron grains	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	chondrules readily delineated		28 kg	less than 20 % monoclinic	transparent, recrystallized, moderate size crystals	moderate	less than 0.2 % by weight	greater than 20 % by weight, kamacite and taenite in exsolution relationship	E5 chondrite	less than 1.5 % by weight	2	less than 0.5 % by weight
EH6 chondrite	the range over at which the alteration took place		homogeneous	secondary, grains greater than 50 microns	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	chondrules poorly defined		59 kg	orthorhombic	transparent, recrystallized, coarse crystals	strong	less than 0.2 % by weight	greater than 20 % by weight, kamacite and taenite in exsolution relationship	E6 chondrite	less than 1.5 % by weight	8	less than 0.5 % by weight
QUE 94204		EH chondrite		usually plagioclase tectosilicate				small sphere of about 1 mm diameter of formerly melted minerals		234 kg	definition goes here	fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents		in weight %			0 % by weight (approximately)	16
Y-793225		EH chondrite		usually plagioclase tectosilicate				small sphere of about 1 mm diameter of formerly melted minerals		234 kg	definition goes here	fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents		in weight %			0 % by weight (approximately)	16

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