Results 191 to 200 of about 130,537 (229)
Some of the next articles are maybe not open access.
Lunar Soil: Size Distribution and Mineralogical Constituents
Science, 1970The lunar soil collected by Apollo 11 consists primarily of submillimeter material and is finer in grain size than soil previously recorded photographically by Surveyor experiments. The main constituents are fine-grained to glassy rocks of basaltic affinity and coherent breccia of undetermined origin. Dark glass, containing abundant nickel-iron spheres,
M B, Duke +4 more
openaire +2 more sources
The lunar regolith: Chemistry, mineralogy, and petrology
Reviews of Geophysics, 1982The lunar regolith, a several meter thick layer of unconsolidated debris, forms the interface between the moon and its space environment. The regolith forms from lithic sources by the destructional processes of comminution and the constructional processes of agglutinate formation. In this manner a steady state soil can develop and will remain in a type
J. J. Papike, S. B. Simon, J. C. Laul
openaire +1 more source
Mössbauer mineralogy on the Moon: The lunar regolith
Hyperfine Interactions, 1998A first-order requirement for spacecraft missions that land on solid planetary objects is instrumentation for mineralogical analyses. For purposes of providing diagnostic information about naturally-occurring materials, the element iron is particularly important because it is abundant and multivalent.
Richard V. Morris +3 more
openaire +1 more source
Acta Geologica Sinica - English Edition, 2021
AbstractThe methods of deriving FeO and TiO2contents from the Clementine spacecraft data were discussed, and an approach was developed to derive the content from the measurements using the Moon Mineralogy Mapper (M3) instrument on Chandrayaan‐1. The density of lunar bedrock was then modeled on the basis of the derived FeO and TiO2abundances.
Weijia ZHANG +3 more
openaire +1 more source
AbstractThe methods of deriving FeO and TiO2contents from the Clementine spacecraft data were discussed, and an approach was developed to derive the content from the measurements using the Moon Mineralogy Mapper (M3) instrument on Chandrayaan‐1. The density of lunar bedrock was then modeled on the basis of the derived FeO and TiO2abundances.
Weijia ZHANG +3 more
openaire +1 more source
Mineralogic and Petrologic Study of Lunar Anorthosite Slide 15415,18
Science, 1972The anorthosite slide 15415,18 contains > 98 percent subhedral plagioclase (97 mole percent anorthite), two pyroxenes: diopsidic augite (46 percent wollastonite, 39 percent enstatite, 16 percent ferrosilite) with subsidiary (100) lamellae and grains of hypersthene (2.5 percent wollastonite, 58 percent enstatite, 39.5 percent ferrosilite), and traces
R B, Hargraves, L S, Hollister
openaire +2 more sources
MINERALOGY, PETROLOGY AND CHEMISTRY OF LUNAR ROCK 12039
Meteoritics, 1972Rock 12039 belongs to the olivine‐depleted group of magmatic rocks characterized by normative and modal SiO2, absence or very low abundance of olivine, and high FeO/(FeO + MgO), Ti/Cr, and CaO/MgO ratios. Clinopyroxenes in this rock show a complex, essentially continuous, compositional zonation from augite cores through ferroaugite to ferrohedenbergite
T. E. Bunch, Klaus Keils, Martin Prinz
openaire +1 more source
Mineralogical studies of lunar rock 12013, 10
Earth and Planetary Science Letters, 1970Abstract A preliminary report is given on the mineralogy of three fragments of lunar rock 12013, 10. In both light and dark areas crystals of plagioclase, alkali feldspar, ilmenite, quartz and other minerals are encrusted with a sugary coating of quartz. This coating also contains dispersed opaque fine particles and small crystallites of SiC, brasses
P. Gay, M.G. Bown, K.O. Rickson
openaire +1 more source
The Texture and Mineralogy of Lunar Peridotite, 15445,10
The Journal of Geology, 1973Rock fragment 15445,10 consists of dominant olivine (91 mole % Mg₂SiO₄, 0.03 wt % NiO) and aluminous enstatite (91 mole % MgSiO₃, 5 wt % Al₂O₃), together with substantial chrome spinel (14 wt % Cr₂O₃), minor amounts of granular, interstitial plagioclase (94 mole % CaAl₂Si₂O₈), and traces of rutile (?) (1.0 wt % Nb₂O₅) and armalcolite.
openaire +1 more source
Mineralogical mapping of selected areas of the lunar surface using Moon Mineralogy Mapper data.
2023The dissertation is concerned with spectrophotometric studies of selected areas of the lunar surface using the data generated by the mapping spectrometer Moon Mineralogy Mapper (M3), onboard the Chandrayaan-1 spacecraft. Spectrophotometry is one tool to investigate planetary surfaces by remote sensing.
Surkov, Yehor +4 more
openaire +2 more sources
Lunar materials: Their mineralogy, petrology and chemistry
Earth-Science Reviews, 1972Abstract The manned Apollo 11, 12, 14 and 15 and the automated Luna 16 lunar missions have provided us with lunar rock and regolith (soil) samples from a number of geologically distinct sites. The mare regions were sampled by Apollo 11, 12 and Luna 16, whereas Apollo 14 landed on a terrain with more relief, the Fra Mauro Formation which represents an
openaire +1 more source