An unusual layered mineral in chondrules and aggregates of the Allende carbonaceous chondrite

Kazushige Tomeoka; P R Buseck

doi:10.1038/299327a0

An unusual layered mineral in chondrules and aggregates of the Allende carbonaceous chondrite

Kazushige Tomeoka, P R Buseck

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Olivine-rich chondrules and aggregates in the Allende C3(V) carbonaceous chondrite are characterized by abundant opaque spherules of metal, sulphide and magnetite grains. This assemblage has been explained as resulting from the crystallization of immiscible metal-sulphide-oxide liquids, suspended as droplets within the chondrules¹. Petrographic evidence indicates a significant metasomatic effect in a highly oxidizing condition in a later cooled stage^2,3. We have found that an unusual Fe-, Ni-and O-rich layered mineral, related to serpentine, occurs within the opaque assemblage; it is formed by alteration of olivine. The textural and compositional features are clearly distinct from terrestrial phyllosilicates. This is the first report of a serpentine-related mineral in the Allende meteorite. Our observations suggest that aqueous conditions occurred in Allende before the final stage of meteorite formation.

Original language	English (US)
Pages (from-to)	327-329
Number of pages	3
Journal	Nature
Volume	299
Issue number	5881
DOIs	https://doi.org/10.1038/299327a0
State	Published - Dec 1 1982

ASJC Scopus subject areas

General

Access to Document

10.1038/299327a0

Fingerprint Dive into the research topics of 'An unusual layered mineral in chondrules and aggregates of the Allende carbonaceous chondrite'. Together they form a unique fingerprint.

Cite this

@article{71dd513721c64ba39f17c05d6e96456b,

title = "An unusual layered mineral in chondrules and aggregates of the Allende carbonaceous chondrite",

abstract = "Olivine-rich chondrules and aggregates in the Allende C3(V) carbonaceous chondrite are characterized by abundant opaque spherules of metal, sulphide and magnetite grains. This assemblage has been explained as resulting from the crystallization of immiscible metal-sulphide-oxide liquids, suspended as droplets within the chondrules1. Petrographic evidence indicates a significant metasomatic effect in a highly oxidizing condition in a later cooled stage2,3. We have found that an unusual Fe-, Ni-and O-rich layered mineral, related to serpentine, occurs within the opaque assemblage; it is formed by alteration of olivine. The textural and compositional features are clearly distinct from terrestrial phyllosilicates. This is the first report of a serpentine-related mineral in the Allende meteorite. Our observations suggest that aqueous conditions occurred in Allende before the final stage of meteorite formation.",

author = "Kazushige Tomeoka and Buseck, {P R}",

year = "1982",

month = dec,

day = "1",

doi = "10.1038/299327a0",

language = "English (US)",

volume = "299",

pages = "327--329",

journal = "Nature",

issn = "0028-0836",

publisher = "Nature Publishing Group",

number = "5881",

}

TY - JOUR

T1 - An unusual layered mineral in chondrules and aggregates of the Allende carbonaceous chondrite

AU - Tomeoka, Kazushige

AU - Buseck, P R

PY - 1982/12/1

Y1 - 1982/12/1

N2 - Olivine-rich chondrules and aggregates in the Allende C3(V) carbonaceous chondrite are characterized by abundant opaque spherules of metal, sulphide and magnetite grains. This assemblage has been explained as resulting from the crystallization of immiscible metal-sulphide-oxide liquids, suspended as droplets within the chondrules1. Petrographic evidence indicates a significant metasomatic effect in a highly oxidizing condition in a later cooled stage2,3. We have found that an unusual Fe-, Ni-and O-rich layered mineral, related to serpentine, occurs within the opaque assemblage; it is formed by alteration of olivine. The textural and compositional features are clearly distinct from terrestrial phyllosilicates. This is the first report of a serpentine-related mineral in the Allende meteorite. Our observations suggest that aqueous conditions occurred in Allende before the final stage of meteorite formation.

AB - Olivine-rich chondrules and aggregates in the Allende C3(V) carbonaceous chondrite are characterized by abundant opaque spherules of metal, sulphide and magnetite grains. This assemblage has been explained as resulting from the crystallization of immiscible metal-sulphide-oxide liquids, suspended as droplets within the chondrules1. Petrographic evidence indicates a significant metasomatic effect in a highly oxidizing condition in a later cooled stage2,3. We have found that an unusual Fe-, Ni-and O-rich layered mineral, related to serpentine, occurs within the opaque assemblage; it is formed by alteration of olivine. The textural and compositional features are clearly distinct from terrestrial phyllosilicates. This is the first report of a serpentine-related mineral in the Allende meteorite. Our observations suggest that aqueous conditions occurred in Allende before the final stage of meteorite formation.

UR - http://www.scopus.com/inward/record.url?scp=0019910242&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0019910242&partnerID=8YFLogxK

U2 - 10.1038/299327a0

DO - 10.1038/299327a0

M3 - Article

AN - SCOPUS:0019910242

VL - 299

SP - 327

EP - 329

JO - Nature

JF - Nature

SN - 0028-0836

IS - 5881

ER -

An unusual layered mineral in chondrules and aggregates of the Allende carbonaceous chondrite

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Cite this