SEARCH · Search NASA
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Infrared vibrational spectral correlation derived from terrestrial and synthetic minerals for characterizing Apollo 11 and 12 lunar samples
Primordial trapped planetary noble gases and solar isotopic ratios in separated meteoritic minerals from Orgueil carbonaceous chondrite
Heavy ion track registration in nonconductor minerals, discussing radiation damage and atomic species along trajectory
Heavy ion tracks in silicate minerals, using thermal annealing to identify origins
Lost City /Oklahoma/ meteorite chemical and mineral composition analysis by X ray diffraction and optical emission spectroscopy
Fission track and K-Ar ages of coexisting minerals in drill core from heat-flow boreholes in western central Sierra Nevada batholith
Tranquillityite silicate mineral in crystalline basaltic rocks from Apollo 11 and 12 samples
Opaque mineral compositions in Apollo 12 lunar rocks, noting ilmenite, spinels, native iron and troilite
Microprobe measurements of rare gas composition for lunar rock 12013,10,31 mineral separates, noting cosmic ray bombardment role in K and Ar production
IR vibrational spectroscopic analysis of Apollo 11 and 12 rocks and dust isolated silicate minerals, using LF absorption bands
Electron microprobe analyses are presented for nine elements in 250 glasses and 434 pyroxenes, eight elements in 113 olivines, and six elements in 354 feldspars, 35 spinels, and 159 ilmenites. All grains are from the 125-425 micron fraction of horizon A and horizon D soil from the Luna 16 sample. A norm is presented for each glass analysis and the structural formula is calculated for each mineral analysis.
Types of remote sensing which can best be done from spacecraft and types which can best be done from aircraft are discussed. Five geologically distinctive areas in northwestern Saudi Arabia were selected for detailed study. The areas were mapped as thoroughly as possible on each of several different types of imagery. The final objective was to identify those classes of geologic problems that can best be resolved using satellite data and then to identify areas where orbital imagery might profitably be used to extend existing knowledge, with emphasis placed on mineral exploration.
The U distribution in rock 12013 was studied by fission track and elemental mapping techniques. Major U-bearing phases are whitlockite, apatite, zircon, and phase beta, which is a Zr-Ti mineral rich in Fe, Nb, Y, REE, and containing up to 3.6% UO2, 4.7% ThO2 and 4.2% PbO. Calculated microprobe ages for phase beta average 4.0 b.y. and are in reasonable agreement with Rb-Sr and K-Ar ages. Phase beta plays a significant role in the U-Th-Pb systematics of rock 12012 and may play a similar role in the model ages of lunar soil.
The opaque mineralogy of the Luna 16 soil sample is studied, with an emphasis on a detailed survey of the compositional variations of the Fe-Ti-Cr-Al-Mg spinels. Analytical data are also presented for ilmenite. Textural characteristics and shock-metamorphic effects on the opaque minerals are briefly described and comparisons are made throughout between the Luna 16 samples and published and unpublished data on the Apollo samples.
A theory of the spectral reflectance or emittance of particulate minerals was developed. The theory is expected to prove invaluable in the interpretation of the remote infrared spectra of planetary surfaces.
Relation of ERTS-1 detected geologic structure to ore and mineral fuel deposits in northern California coast ranges
Regional tectonic control of tertiary mineralization and recent faulting in southern basin-range province of California, Nevada, and Arizona
ERTS-1 applications in earthquake research and mineral exploration in California