enstatite chondrite Comparison Table

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enstatite chondrite comparison table

Subject has metal abundance has alteration temperature range has refractory inclusion abundance has total iron content has olivine and low Ca pyroxene homogeneity has part feldspar has metamorphism mechanism has degree of secondary process has chondrule glass type has chondrule abundance 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 matrix abundance has part carbon has petrologic type has part maximum bulk Ni in metal is a kind of has part water has number of find has chondrule mean diameter has part sulfide Ni content

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

E4 chondrite in volume % the range over at which the alteration took place in volume % less than 5 % mean deviations secondary, grains than 2 microns thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent in volume % chondrules well defined 143 kg greater than 20 % monoclinic transparent, recrystallized, small crystals weak in volume % less than 0.2 % by weight 4 greater than 20 % by weight, kamacite and taenite in exsolution relationship type 4 chondrite less than 1.5 % by weight 5 millimeters less than 0.5 % by weight

E5 chondrite in volume % the range over at which the alteration took place in volume % homogeneous secondary, 2 to 50 micron grains thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent in volume % chondrules readily delineated 28 kg less than 20 % monoclinic transparent, recrystallized, moderate size crystals moderate in volume % less than 0.2 % by weight 5 greater than 20 % by weight, kamacite and taenite in exsolution relationship type 5 chondrite less than 1.5 % by weight 2 millimeters less than 0.5 % by weight

E6 chondrite in volume % the range over at which the alteration took place in volume % homogeneous secondary, grains greater than 50 microns thermal metamorphism providing insight into geological evolution of parent asteroid devitrified, absent in volume % chondrules poorly defined 59 kg orthorhombic transparent, recrystallized, coarse crystals strong in volume % less than 0.2 % by weight 6 greater than 20 % by weight, kamacite and taenite in exsolution relationship type 6 chondrite less than 1.5 % by weight 8 millimeters less than 0.5 % by weight

EH chondrite 8 % by volume 0.1 to 1 % by volume high usually plagioclase tectosilicate 60 to 80 % by volume 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 less than 2 to 15 % by volume in weight % 3 to 5 enstatite chondrite 0 % by weight (approximately) 16 0.2 millimeters

EL chondrite 15 % by volume 0.1 to 1 % by volume low usually plagioclase tectosilicate 60 to 80 % by volume 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 less than 2 to 15 % by volume in weight % 3 to 6 enstatite chondrite 0 % by weight (approximately) 16 0.6 millimeters

ungrouped enstatite chondrite in volume % in volume % usually plagioclase tectosilicate in volume % 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 volume % in weight % enstatite chondrite 0 % by weight (approximately) 16 millimeters

Next anhydrous chondrite: ordinary chondrite Up: anhydrous chondrite, highly reduced meteorite Previous anhydrous chondrite: CK chondrite

Subject	has metal abundance	has alteration temperature range	has refractory inclusion abundance	has total iron content	has olivine and low Ca pyroxene homogeneity	has part feldspar	has metamorphism mechanism	has degree of secondary process	has chondrule glass type	has chondrule abundance	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 matrix abundance	has part carbon	has petrologic type	has part maximum bulk Ni in metal	is a kind of	has part water	has number of find	has chondrule mean diameter	has part sulfide Ni content
E3 chondrite	in volume %		in volume %		greater than 5 % deviations	minor primary grains only			clear, isotropic, variable abundance	in volume %	chondrules very sharply defined	none	1 kg	predominantly monoclinic	clastic and minor opaque	none	in volume %	0.2 to 1 % by weight	3	greater than 20 % by weight, kamacite and taenite in exsolution relationship	type 3 chondrite	0.3 to 3 % by weight	1	millimeters	less than 0.5 % by weight
E4 chondrite	in volume %	the range over at which the alteration took place	in volume %		less than 5 % mean deviations	secondary, grains than 2 microns	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	in volume %	chondrules well defined		143 kg	greater than 20 % monoclinic	transparent, recrystallized, small crystals	weak	in volume %	less than 0.2 % by weight	4	greater than 20 % by weight, kamacite and taenite in exsolution relationship	type 4 chondrite	less than 1.5 % by weight	5	millimeters	less than 0.5 % by weight
E5 chondrite	in volume %	the range over at which the alteration took place	in volume %		homogeneous	secondary, 2 to 50 micron grains	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	in volume %	chondrules readily delineated		28 kg	less than 20 % monoclinic	transparent, recrystallized, moderate size crystals	moderate	in volume %	less than 0.2 % by weight	5	greater than 20 % by weight, kamacite and taenite in exsolution relationship	type 5 chondrite	less than 1.5 % by weight	2	millimeters	less than 0.5 % by weight
E6 chondrite	in volume %	the range over at which the alteration took place	in volume %		homogeneous	secondary, grains greater than 50 microns	thermal metamorphism	providing insight into geological evolution of parent asteroid	devitrified, absent	in volume %	chondrules poorly defined		59 kg	orthorhombic	transparent, recrystallized, coarse crystals	strong	in volume %	less than 0.2 % by weight	6	greater than 20 % by weight, kamacite and taenite in exsolution relationship	type 6 chondrite	less than 1.5 % by weight	8	millimeters	less than 0.5 % by weight
EH chondrite	8 % by volume		0.1 to 1 % by volume	high		usually plagioclase tectosilicate				60 to 80 % by volume	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		less than 2 to 15 % by volume	in weight %	3 to 5		enstatite chondrite	0 % by weight (approximately)	16	0.2 millimeters
EL chondrite	15 % by volume		0.1 to 1 % by volume	low		usually plagioclase tectosilicate				60 to 80 % by volume	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		less than 2 to 15 % by volume	in weight %	3 to 6		enstatite chondrite	0 % by weight (approximately)	16	0.6 millimeters
ungrouped enstatite chondrite	in volume %		in volume %			usually plagioclase tectosilicate				in volume %	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 volume %	in weight %			enstatite chondrite	0 % by weight (approximately)	16	millimeters