NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The Apollo 15 regolith - Comparative petrology of drive tube 15010/15011 and drill core section 15003Two Apollo 15 regolith cores - double drive-tube 15010/15011 and deep drill core section 15003 - were compared. The drive tube was taken from near the edge of Hadley Rille within the mare region and the drill core was taken from the landing site, approximately the same distance as the drive tube from the Apennine Front. Optical modes were done on the two cores, each of which was divided into three stratigraphic units defined by minor differences in grain size and modal abundances. Electron microprobe data were collected on the mineral and glass fragments within each unit. Fused-soil-free bulk chemistries were calculated for each unit by modal recombination, using our modal data and average compositional and density data for soil components. It is found that the drive tube and drill core section are fairly homogeneous units both chemically and modally. Both soils are submature to immature. There are, however, significant differences between the cores. The drill core shows significant enrichments of highland lithic-fragments and highland-derived minerals and glasses relative to the drive tube. These differences are attributed to the fresh nature of the drive tube soil whose major source material is mare basalt ejecta from the shallow bedrock.
Document ID
19820048170
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Walker, R. J.
(State Univ. of New York Stony Brook, NY, United States)
Papike, J. J.
(New York, State University Stony Brook, NY, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 16, 1981
End Date: March 20, 1981
Accession Number
82A31705
Funding Number(s)
CONTRACT_GRANT: NSG-9044
Distribution Limits
Public
Copyright
Other

Available Downloads

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