Results 141 to 150 of about 1,884 (162)
Some of the next articles are maybe not open access.
Mensuration and Isostasy of Lunar Mascons and Maria
Nature, 1969The theory that mascons have been formed by the partial filling of impact craters now leads to the conclusion that they are isostatically in equilibrium with the rocks beneath.
openaire +1 more source
Modelling of temperatures of selected points in lunar maria
The Moon and the Planets, 1980The purpose of this paper is to propose a numerical model representing the brightness temperature of ten selected sites of the Moon as measured in CERGA. A theoretical approach is proposed in which the temperature is expressed as a function of the local zenith distance of the Sun and a quantity depending upon the local zenith distance of the observer ...
J. Gay +4 more
openaire +1 more source
Evidence for isostasy in the lunar mascon Maria
The Moon, 1976The pronounced positive gravity anomalies in the lunar circular maria imply lack of isostatic compensation of the lunar mascons. This lack of isostasy is hard to reconcile with the rheological properties of the lunar crust. Analysis of the negative ring anomalies that appear to surround the major positive gravity peaks indicates that associated with ...
openaire +1 more source
40Ar39Ar ages from the lunar maria
Earth and Planetary Science Letters, 1971Neutron activation and stepwise heating experiments have been used to measure argon retention ages of crystalline rocks 12002, 12051 and 12065 from Oceanus Procellarum. The effects of appreciable argon loss are observed for all rocks. Ages based on the release of argon from retentive sites are, within the errors of measurement, identical and are ...
openaire +1 more source
Absolute ages of the lunar maria and large craters
Icarus, 1969Abstract By an analysis of the changes in rim heights of lunar craters through isostatic settling, combined with inferences from counts of small impact craters contained within and subsequent to large craters, it is concluded that: (1) the maria are not older than about 640 million years; and (2) the flux of masses which produced craters larger than ...
openaire +1 more source
Surface structure and mechanical properties of the lunar maria
Journal of Geophysical Research, 1967Structural and mechanical properties of lunar maria surface material derived from satellite and earth-based ...
openaire +1 more source
On the distribution of lunar maria and the synchronous rotation of the Moon
Icarus, 1962Presentation of a hypothesis to explain the predominance of maria on the near side of the lunar ...
openaire +1 more source
Nature of the Density Reversal Beneath the Lunar Maria
Geological Society of America Bulletin, 1972The density of basalt samples from Mare Tranquillitatis and Oceanus Procellarum is 3.36 g/cm 3 . These basalts should undergo a phase change at a pressure of approximately 10 kbar (200 km lunar depth) that would increase the density to 3.74 g/cm 3 . This density is substantially higher than the average density of the moon; therefore, lunar maria must ...
openaire +1 more source