NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Identification of solar nebula condensates in interplanetary dust particles and unequilibrated ordinary chondritesOrthopyroxene and olivine grains, low in FeO, but containing MnO contents up to 5 wt percent were found in interplanetary dust particles (IDP) collected in the stratosphere. The majority of olivines and pyroxenes in meteorites contain less than 0.5 wt percent MnO. Orthopyroxenes and olivines high in Mn and low in FeO have only been reported from a single coarse grained chondrule rim in the Allende meteorite and from a Tieschitz matrix augite grain. The bulk MnO contents of the extraterrestrial dust particles with high MnO olivines and pyroxenes are close to CI chondrite abundances. High MnO, low FeO olivines and orthopyroxenes were also found in the matrix of Semarkona, an unequilibrated ordinary chondrite. This may indicate a related origin for minerals in extraterrestrial dust particles and in the matrix of unequilibrated ordinary chondrites.
Document ID
19900007313
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kloeck, W. (NASA Lyndon B. Johnson Space Center Houston, TX., United States)
Thomas, K. L. (Lockheed Corp. Houston, TX., United States)
Mckay, D. S. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Lunar and Planetary Inst., Workshop on Analysis of Returned Comet Nucleus Samples
Subject Category
Astrophysics
Accession Number
90N16629
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available