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High alumina (HA) and very high potassium (VHK) basalt clasts from Apollo 14 breccias. I - Mineralogy and Petrology - Evidence of crystallization from evolving magmasThe mineralogy and petrography of very high potassium (VHK) and high alumina (HA) basalts from the Apollo 14 site provide an insight into their magmatic evolution. Generally, their parageneses are similar, with olivine and chromite the early liquidus phases, followed by plagioclase and pyroxene, which crystallized together. Although late-stage ilmenite and FeNi metal occur in both VHK and HA samples, the VHKs also crystallize K-feldspar and Fa-rich olivine. Zoning of constituent minerals is similar for both basalt types, demonstrating that the parental magmas for both HA and VHK basalts became enriched in K, Na, Ca, Fe, and Ti and depleted in Mg and Al as crystallization proceeded. Enrichment of K in the VHK basalts is above that expected from normal fractional crystallization.
Document ID
19890049126
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Neal, C. R.
(Tennessee Univ. Knoxville, TN, United States)
Taylor, L. A.
(Tennessee Univ. Knoxville, TN, United States)
Patchen, A. D.
(Tennessee, University Knoxville, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Country: United States
Start Date: March 14, 1988
End Date: March 18, 1988
Accession Number
89A36497
Funding Number(s)
CONTRACT_GRANT: NAG9-62
Distribution Limits
Public
Copyright
Other

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