Catalog of Al-rich chondrules, inclusions, and fragments in ordinary chondrites by A. Bischoff

Cover of: Catalog of Al-rich chondrules, inclusions, and fragments in ordinary chondrites | A. Bischoff

Published by Dept. of Geology & Institute of Meteoritics, University of New Mexico in Albuquerque, N.M., USA .

Written in English

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Subjects:

  • Chondrites (Meteorites) -- Catalogs and collections.,
  • Chondrules -- Catalogs and collections.

Edition Notes

Bibliography: p. 5.

Book details

StatementA. Bischoff and K. Keil.
SeriesSpecial publication / UNM Institute of Meteoritics ;, no. 22, Special publication (University of New Mexico. Institute of Meteoritics) ;, no. 22.
ContributionsKeil, Klaus.
Classifications
LC ClassificationsQB758.5.C46 B57 1983
The Physical Object
Pagination29 p. :
Number of Pages29
ID Numbers
Open LibraryOL3002796M
LC Control Number84621912

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Catalog of Al-rich chondrules, inclusions, and fragments in ordinary chondrites. Albuquerque, N.M., USA: Dept. of Geology & Institute of Meteoritics, University of New Mexico, [] (OCoLC) PDF | On Jan 1,A.

Bischoff and others published Catalog of Al-rich chondrules, inclusions, and fragments in ordinary chondrites | Find, read and cite all the research you need on ResearchGate.

a) Al-rich chondrules and irregularly-shaped inclusions and fragments are wide-spread, albeit rare, constituents of ordinary chondrites and are similar to CAIs (except the coarse-grained ones) in carbonaceous chondrites, thus providing strong support for a related origin of ordinary and carbonaceous chondrites and their constituents,Cited by: Ca-Al-rich chondrules and inclusions in ordinary chondrites: Evidence for a related genesis of ordinary and carbonaceous chondrites Article (PDF Available) December with 11.

Bischoff A. and Keil K.: Catalog of Al-rich chondrules, inclusions and fragments in ordinary chondrites. Special Publication No. 22, UNM, Institute of Meteoritics, Albuquerque, 1 - 33 (). Bischoff A. and Keil K.: Ca-Al-rich chondrules and inclusions in ordinary chondrites.

Introduction. Al-rich chondrules are rare constituents of most chondrites. They are characterized by a range of textures similar to those in ‘normal’ ferromagnesian chondrules but contain, in addition to olivine or low-calcium pyroxene, one or more of the primary phases calcic plagioclase (bytownite or anorthite), Al-rich diopside, and Al-rich spinel, frequently with Cited by: Al-rich objects (Ca,Al-rich inclusions (CAIs), Al-rich chondrules, Al-rich fragments) occur in all chondrite classes.

These Catalog of Al-rich chondrules can be centimeter-sized in CV3 carbonaceous chondrites, but they are generally much smaller in other chondrite groups and by: 28 – 27 Bischoff A. and Keil K.: Catalog of Al-rich chondrules, inclusions and fragments in ordinary chondrites.

Special Publication No, UNM, Institute of Meteoritics, Albuquerque, (). 29 – 24 Metzler K. and Bischoff A.: Constraints on chondrite agglomeration from fine-grained chondrule rims.

Book chapter in: "Chondrules and the. Porphyritic Al-rich chondrules are consistently 16 O-rich relative to nonporphyritic ones, suggesting that degree of melting is a key factor and pointing to a nebular setting for the isotopic exchange process.

Because Al-rich chondrules are closely related to ferromagnesian chondrules, their radiogenic Mg isotopic abundances can plausibly be. 37 - 38 Bischoff A. and Keil K.: Catalog of Al-rich chondrules, inclusions and fragments in ordinary chondrites. Special Publication No, UNM, Institute of Meteoritics, Albuquerque, 9.

Bischoff A. and Keil K.: Catalog of Al-rich chondrules, inclusions and fragments in ordinary chondrites. Special Publication No. 22, UNM, Institute of Meteoritics, Albuquerque, 1 - 33 (). Bischoff A. and Keil K.: Ca-Al-rich chondrules and inclusions in ordinary chondrites: Evidence for a related genesis of ordinary and carbonaceous.

Ca,Al‐rich inclusions in Rumuruti (R) chondrites. January ; Catalog of Al-rich chondrules, inclusions, and fragments in ordinary chondrites. Article. Geochimica et Cosmochimica Acta Vol. 50, pp. Peitamon Journals Ltd. Printed in U.S.A. /86/$ + Silica-bearing chondrules and clasts in ordinary chondrites* C.

BRIGHAM', H. YABUK.I2, Z. OUYANG2, M. MURRELL', A. EL GORESY''2 and Inclusions. BURNETT' 'Division of Geological and Planetary Sciences, California Institute of Cited by: Ca-Al-rich chondrules and inclusions in ordinary chondrites Article (PDF Available) in Nature () July with 27 Reads How we measure 'reads'.

The chondrules in both EH3 and EL3 show a range of text ures sim ilar to those in ordinary and carbonaceous chondrites. However, enstatite (with generally. the solar system, and yet true Type B CAIs are found only in the CV3 chondrites. The CAI populations in some of the other chondrite types are also distinctive.

For example, although melilite is common in the CAIs of most chondrite types (including ordinary and enstatite chondrites), CAIs in CM chondrites only rarely contain Size: KB. Aluminum in calcium-aluminum-rich inclusions and chondrules from unequilibrated ordinary chondrites GARY R.

HUSSIJ*, GLENN J. MAcPHERSON~, G. WASSERBURGI, SARA S. RUSSELL2P AND GOPALAN SRINIVASANIJ lDivision of Geological and Planetary Sciences, Mail CodeCalifornia Institute of Technology, Pasadena, California 91USA.

Among the ordinary chondrites, the LL chondrites are the most oxidized group having high Fa‐ and Fs contents in olivine and pyroxene (roughly 27–32 and 22–25 mole%, respectively). Olivine in fragment MS‐CH is nearly equilibrated and has about 36 mole% Fa, which is far above the value for LL‐group ordinary by: Abstract— In order to investigate the distribution of 26 A1 in chondrites, we measured aluminum‐magnesium systematics in four calcium‐aluminum‐rich inclusions (CAIs) and eleven aluminum‐rich chondrules from unequilibrated ordinary chondrites (UOCs).

All four CAIs were found to contain radiogenic 26 Mg (26 Mg*) from the decay of 26 A1. The inferred initial 26 Al/ Cited by: The largest structural components of most chondrites are the glass-bearing chondrules, and there are numerous theories for their origin.

This clear and systematic text summarizes the ideas surrounding the origin and history of chondrules and chondrites, drawing on research from the various scientific disciplines involved.

Chondrites are the largest group of meteorites. They can provide unique insights into the origins and early evolution of our Solar System, and even into the relationships between our Solar System and other stars in the vicinity of our Sun. The largest structural components of most chondrites are the glass-bearing chondrules, and there are numerous theories for their.

Bischoff A. and Keil K.: Ca-Al-rich chondrules and inclusions in ordinary chondrites, NatureNo.(). Bischoff A. and Keil K.: Catalog of Al-rich chondrules, inclusions and fragments in ordinary chondrites.

Special Publication No, UNM, Institute of Meteoritics, Albuquerque, (). inclusion and the nature of the chondrules, refractory inclusions, matrix, and metal grains vary widely among the groups. The chondrules and other components in a group tend to have characteristic size ranges, reflecting size-dependent concentration in the nebula (Cuzzi et al.Liffman ).

Thus each chondrite group appears to be com. The ordinary chondrites (sometimes called the O chondrites) are a class of stony chondritic are by far the most numerous group and comprise about 87% of all finds. Hence, they have been dubbed "ordinary".

The ordinary chondrites are thought to have originated from three parent asteroids, with the fragments making up the H chondrite, L chondrite and LL Compositional type: Stony.

of the orthopyroxenes. It is the major mineral in all ordinary, carbonaceous, and R chondrites as well as the basaltic achondrites. Fayalite Fe 2 SiO 4 The iron end member of the olivine solid solution series.

Fayalite content is diagnostic for petrographic types of ordinary chondrites. It is a major mineral in all chondrites except E chondrites. Chondrites are the most primitive are named for their primary constituent, chondrules, spherical grains that directly condensed out of the solar nebula and which underwent one or more heating and cooling dual chondrules are thought to have formed in distinctive locations within the solar nebula, but a chondrite typically contains a mix of chondrites.

Chondrite Types and their Origins (e.g., Hutcheon et al. The fact that the chondrite Allende, with the oldest chon-drules, is a representative of the class of chondrites (CV) having the largest content of.

radionuclide aluminum in chondrules from ordinary and carbonaceous chondrites have been interpreted to indicate that they formed over an extended period from 1 million to at least 3 and perhaps as long as 10 million years after the refractory inclusions.

There is some debate, however, over whether these ages, particularly Read More. This book is well written and contains invaluable information to anyone who has a strong interest in learning about chondrites and the origin of author Sears is an icon in the world of meteorites.I have enjoyed learning more about thermoluminescence sensitivity&crucial element book discusses the several secondary processes of Cited by: A 4 × 6 μm terminal particle from Stardust tracknamed Bidi, is composed of a refractory assemblage of Fo 97 olivine, Al- and Ti-bearing clinopyroxene and anorthite feldspar (An 97).Mineralogically, Bidi resembles a number of components found in primitive chondritic meteorites including Al-rich chondrules, plagioclase-bearing type I ferromagnesian chondrules Cited by: For desert finds, cf.

DaG Most probably, all chondrites were at one stage chondrites of the petrological type 3. In type-3 chondrites the globular silicate inclusions, the so called chondrules, distinguish themselves clearly from the fine-crystalline ground mass (matrix).

Ordinary chondrites are by far the most common type of meteorite to fall to Earth: about 80% of all meteorites and over 90% of chondrites are ordinary chondrites. They contain abundant chondrules, sparse matrix (10–15% of the rock), few refractory inclusions, and variable amounts of Fe-Ni metal and troilite (FeS).

Their chondrules are Compositional type: Stony. Chemical, petrographic and mineralogical studies of the Sharps chondrite reveal that this meteorite is a complex agglomerate of chondrules and lithic fragments in a matrix similar in composition to carbonaceous chondrites.

One type of fragment resembles Type II carbonaceous chondrites in composition, but contains igneous glass and has been Cited by: CM chondrites are a group of chondritic meteorites which resemble their type specimen, the Mighei CM is the most commonly recovered group of the 'carbonaceous chondrite' class of meteorites, though all are rarer in collections than ordinary chondrites.

Ordinary chondrites contain many more type II chondrules than carbonaceous in which only 3 type II chondruleschondrites (were analyzed in our previous study (Jacquet et al.

)) and will allow insight on the type I/type II chondrule by: HOW CHONDRULES AND CALCIUM-RICH, ALUMINUM-RICH INCLUSIONS CONSTRAIN DISK PROCESSES AND PLANET FORMATION.

Desch1 1School of Earth and Space Exploration, Arizona State University (PO Box Tempe [email protected]). Aluminum-rich chondrules (ARCs), which share mineralogic and chemical properties with both Ca, Al-rich inclusions (CAIs) and ferromagnesian chondrules, play an important role in revealing their temporal and petrogenetic relationships.

In this work, seven ARCs were found in three ordinary chondrites GRV (H4), GRV (H) and Cited by: 1. Chondrules and Ordinary Chondrites Discussion Summary As Interpreted by Sierra V. Kaufman Spectral Properties of Near-Earth Asteroids: Evidence for Sources of Ordinary Chondrite Meteorites.

(Binzel et al., ) This paper marks the first time near-Earth asteroids were capable of being observed. The authors observe a sample size. Chondrules are spherical silicate grains which formed from protoplanetary disk material, and as such provide an important record of the conditions of the Solar System in pre-planetary times.

Chondrules are a major constituent in chondritic meteorites, however despite being recognised for over years, their origins remain enigmatic. Formation times of chondrules and Ca-Al-rich inclusions: Chondrules and the protoplanetary disk: an overview \/ R.H. Hewins -- 2. Hutchison -- Collision of icy and slightly differentiated bodies as an origin for unequilibrated ordinary chondrites \/ A.

Tsuchiyama \/ M. Kitamura. The smallest fragments are isolated olivine and pyroxene grains; these are probably phenocrysts liberated from disrupted porphyritic chondrules. All five LL3 chondrites have fragment/chondrule number ratios exceeding unity, suggesting that substantial numbers of the chondrules in these rocks were by: Primitive meteorites (chondrites) are the only available fragments of asteroidal belt objects that formed early in the disk and escaped global melting and differentiation.

Chondrites comprise four main components: refractory inclusions [Ca-Al–rich inclusions (CAIs)], chondrules, Fe-Ni metal beads, and fine-grained by: Three anorthite-rich chondrules contain relic Ca, Al-rich inclusions composed of anorthite, spinel, ±Al-diopside, and ±forsterite.

A few chondrules contain regions which are texturally and mineralogically similar to magnesian (Type I) chondrules and consist of forsterite, low-Ca pyroxene and abundant FeNi-metal nodules.

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