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Luna 16 - Some Li, K, Rb, Sr, Ba, rare-earth, Zr, and Hf concentrations.Concentrations of Li, K, Rb, Sr, Na, rare-earths, Zr and Hf have been determined for some Luna 16 core materials by mass-spectrometric isotope-dilution. Two regolith fines samples from different depths in the core, and four rock-chips, including both igneous rocks and breccias, have similar trace-element concentrations. The Luna 16 materials have general lunar trace-element characteristics but differ from other returned lunar samples in a manner that suggests the presence of excess feldspar. Unless the Luna 16 igneous rocks are fused soils, they appear to represent either partial plagioclase cumulates or the least differentiated igneous material yet returned from the moon. The similarity in trace-element concentrations of the igneous rocks and the fines would then suggest largely local derivation of the Luna 16 regolith.
Document ID
19720038606
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Philpotts, J. A.
Schnetzler, C. C.
Schuhmann, S.
Thomas , H. H.
(NASA Goddard Space Flight Center Laboratory for Space Physics, Greenbelt, Md., United States)
Bottino, M. L.
(NASA Goddard Space Flight Center Laboratory for Space Physics, Greenbelt, Md.; North Carolina, University, Chapel Hill, N.C., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 13
Subject Category
Space Sciences
Accession Number
72A22272
Funding Number(s)
CONTRACT_GRANT: NSF GP-16501
Distribution Limits
Public
Copyright
Other

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