Searching the Sinus Amoris: Using profiles of geological units, impact and volcanic features to characterize a major terrane interface on the Moon

Details Searching the Sinus Amoris: Using profiles of geological units, impact and volcanic features to characterize a major terrane interface on the Moon Searching the Sinus Amoris: Using profiles of geological units, impact and volcanic features to characterize a major terrane interface on the Moon

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994em%26p...64..165c&link_type=abstract

Earth, Moon, and Planets, vol. 64, no. 2, p. 165-185

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2

Geochemistry, Kreep, Lunar Craters, Lunar Geology, Lunar Surface, Lunar Topography, Moon, Volcanoes, Aluminum, Apollo 15 Flight, Basalt, Characterization, Chemical Composition, Concentration (Composition), Correlation, Magnesium, Mineral Deposits, Remote Sensing, Structural Basins, X Ray Fluorescence

Scientific paper

Geochemical profiles of surface units, impact, and volcanic features are studied in detail to determine the underlying structure in an area of extensive mare/highland interface, Sinus Amoris. This study region includes and surrounds the northeastern embayment of Mare Tranquillitatis. The concentrations of two major rock-forming elements (Mg and Al), which were derived from the Apollo 15 orbital geochemical measurements, were used in this study. Mapped units and deposits associated with craters in the northwestern part of the region tend to have correlated low Mg and Al concentrations, indicating the presence of Potassium (K)-Rare Earth Elements (REE)-Phosphorus (P) (KREEP)-enriched basalt. Found along the northeastern rim of Tranquillitatis were areas with correlated high Mg and Al concentration, indicating the presence of troctolite. Distinctive west/east and north/south trends were observed in the concentrations of Mg and Al, and, by implication, in the distribution of major rock components on the surface. Evidence for a systematic geochemical transition in highland or basin-forming units may be observed here in the form of distinctive differences in chemistry in otherwise similar units in the western and eastern portions of the study region.

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