NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Pyroxene poikiloblastic rocks from the lunar highlandsThe results of detailed petrographic, X-ray, electron microprobe, ion probe, and Ar-40/Ar-39 age studies of pyroxene poikiloblastic breccias, an important lunar highlands lithology, are interpreted to indicate that high grade metamorphic recrystallization occurred over wide regions of the moon at about 4.0 G.y. This metamorphism was probably related to a period of high meteorite influx at that time. The temperatures achieved were highly variable but in some cases were sufficiently intense to cause varying degrees of partial melting of the precursor highlands breccias. A complete spectrum of metamorphic grades from only slight recrystallization to virtually complete melting would be expected in such a model. Such a spectrum is observed in the Apollo 16 rocks.
Document ID
19740040096
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Bence, A. E.
Papike, J. J.
Sueno, S.
Delano, J. W.
(New York, State University Stony Brook, N.Y., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Space Sciences
Meeting Information
Meeting: Lunar Science Conference
Location: Houston, TX
Start Date: March 5, 1973
End Date: March 8, 1973
Accession Number
74A22846
Funding Number(s)
CONTRACT_GRANT: NGL-33-015-130
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available