A geochemical and petrographic study of 1-2-mm fines from Apollo 17Samples of fines less than 1-mm and 155 1-2 mm particles from several Apollo 17 sites were analyzed for Na, Sc, Cr, Mn, Fe, Co, Ni, Hf, Ta, Th, and REE. Products of comminution and construction are present in the 1-2 mm particles, and the compositions of the rock fragments clearly indicate the general chemical characteristics of their parent rock types. The likely sources of materials for the glassy particles are considered. Glasses are enriched over their parent soils in Fe, Sc, Mn, and Cr, and are relatively enriched in light REE, so that some chemical fractionation accompanies glass-forming processes. Elements were determined by instrumental neutron activation analysis.
Document ID
19780062826
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Blanchard, D. P. (Wisconsin Univ. Madison, WI, United States)
Haskin, L. A. (NASA Johnson Space Center Houston, Tex., United States)
Korotev, R. L. (Wisconsin, University Madison, Wis., United States)
Brannon, J. C. (Wisconsin Univ. Madison, WI, United States)
Jacobs, J. W. (Wisconsin Univ. Madison, WI, United States)
Brown, R. W. (Lockheed Electronics Co., Inc. Houston, Tex., United States)
Reid, A. M. (NASA Johnson Space Center Houston, Tex.; Cape Town, University, Cape Town, Republic of South Africa, United States)
Donaldson, C. H. (Lunar and Planetary Institute Houston, Tex., United States)