chondrite


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Related to chondrite: Carbonaceous chondrite

chondrite:

see meteoritemeteorite,
meteor that survives the intense heat of atmospheric friction and reaches the earth's surface. Because of the destructive effects of this friction, only the very largest meteors become meteorites.
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chondrite

(kon -drÿt) A type of stony meteorite that contains chondrules. They are the most abundant class of meteorite in the Solar System (about 86%). Chondrites are largely composed of iron- and magnesium-bearing silicate minerals with a wide range of compositions. Their chemical composition is similar to that of the Sun (but depleted in volatile gases like hydrogen and helium). Several types are recognized: carbonaceous chondrites have the highest proportions of volatile elements and are the most oxidized; enstatite chondrites contain the most refractory elements (withstanding high temperatures) and are reduced; ‘ordinary’ chondrites, the most common type, are intermediate in volatile element abundance and oxidation state. Ordinary chondrites plus some carbonaceous chondrites are thought to be primitive samples of early Solar-System material. See also asteroids. Compare achondrite.

Chondrite

 

the most common type of stony meteorite, accounting for 90 percent of all such meteorites. Chondrites are characterized by the presence of chondrules located in the primary, fine-grained mass of the meteorite (see). They contain a significant amount of nickel-bearing iron in the form of small grains that have the same composition and microstructure as the grains in octahedrites.

chondrite

[′kän‚drīt]
(geology)
A stony meteorite containing chondrules.
References in periodicals archive ?
It also explains the observations of the degree of alteration by strikes which appear in those chondrites which reach Earth," noted Josep Maria Trigo.
Wang, "Short-lived chlorine-36 in a Ca- and Al-rich inclusion from the Ningqiang carbonaceous chondrite," Proceedings of the National Academy of Sciences of the United States of America, vol.
The rocks are carbonrich chondrites, ancient fragments of asteroids formed shortly after the birth of the Solar System 5bn years ago.
The Tagish Lake fragments are from a carbonaceous chondrite, a rare class of ancient meteorite that contains water-altered minerals and organic compounds.
It was of a rare kind called a carbonaceous chondrite, a fragile black material that contained measurable quantities of water and organic material.
The samples returned from both of these groundbreaking missions and the new knowledge gained about their parent asteroids will not only finally tell us how the different flavors of carbonaceous chondrite meteorites are related to various types of dark asteroids.
Scientists have said the space rock was a typical chondrite -- a stony, non-metallic meteorite.
However, their mantle normalized trace element and chondrite normalized REE patterns are similar.
Trojan asteroids are dark with albedos typically less than 0.05, which implies a broad opposition effect, but they may be icy and have a bright surface component (similar to carbonaceous chondrite meteorites) both of which imply a sharp opposition effect.
The samples present moderate light to heavy REE fractionation in chondrite normalized plot [(La/Yb) N = 5.02 to 2.25].