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Crystal Size Distributions from Porphyritic Olivine Chondrules: Insights into Formation ConditionsMost chondrules preserve, in their texture, a record of their precursor material and the nature and intensity of the nebular events in which they were formed. We have used crystal size distributions (CSDs) together with crystallization experiments to explore the textures of natural chondrules and their relationships to natural formation conditions. Many careful experimental studies have demonstrated fundamental relationships between the texture of a chondrule and its precursor material, melting intensity, and cooling rate. However, until recently most studies have focused on distinctions between textural types (e.g., barred, radial, porphyritic). Previous work has shown that CSDs provide precise, reproducible characterizations of chondrule-scale textures, and can be used together with crystallization experiments to estimate chondrule formation conditions. Here, we expand this study to investigate the link between texture and formation conditions for a range of natural porphyritic olivine (PO) chondrules.
Document ID
20030111596
Document Type
Conference Paper
Authors
Zieg, M. J. (NASA Johnson Space Center Houston, TX, United States)
Lofgren, G. E. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
JSC-CN-7739
Funding Number(s)
PROJECT: RTOP 344-31-20-20
Distribution Limits
Public
Copyright
Public Use Permitted.

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