Principal components - Petrology and chemistry of polyphase units in chondritic porous interplanetary dust particles

Details Principal components - Petrology and chemistry of polyphase units in chondritic porous interplanetary dust particles Principal components - Petrology and chemistry of polyphase units in chondritic porous interplanetary dust particles

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1173r&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 173.

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4

Interplanetary Dust, Petrology, Principal Components Analysis, Chondrites, Chemical Composition, Grain Size, Porosity, Magnesium Compounds, Iron Compounds, Minerals

Scientific paper

Chondritic porous (CP) interplanetary dust particles (IDPs) can be described as 'cosmic sediments'. It should be possible to recognize in these IDPs the 4500 Myrs old solar nebula dusts. The studies of unaltered chondritic IDPs show that their matrices are a mixture of three different principal components (PCs) that also describe variable C/Si ratios of chondritic IDPs. Among others, PCs include polyphase units (PUs) that are amorphous to holocrystalline, both ultrafine- and coarse-grained, ferromagnesiosilica(te) materials with minor Al and Ca. The properties of PCs and their alteration products define the physical and chemical processes that produced and altered these components. PCs are also cornerstones of IDP classification. For example, the bulk composition of ultrafine-grained PCs can be reconstructed using the 'butterfly method' and also allows an evaluation of the metamorphic signatures, (e.g., dynamic pyrometamorphism), in chondritic IDPs.

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