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Calculations of the moon's thermal history at different concentrations of radioactive elements, taking into account differentiation on melting
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ornatskaya, O. I. Alber, Y. I. Ryazantseva, I. L. |
| Copyright Year | 1977 |
| Description | Calculations of the thermal history of the moon were done by solving the thermal conductivity equation for the case in which the heat sources are the long lived radioactive elements Th, U, and K-40. The concentrations of these elements were adjusted to give 4 variations of heat flow. Calculations indicated that the moon's interior was heated to melting during the first 0.7 to 2.3 x 10 to the 9th power years. The maximum fusion involved practically the entire moon to a distance from 15 to 45 km beneath the surface, and started 3.5 to 4.0 x 10 to the 9th power years ago, or 2.5 x 3.0 x 10 to the 9th power years ago and continued for 1 to 2 x 10 to the 9th power years. The moon today is cooling. The current thickness of the solid crust is from 150 to 200 km and the heat flow exceeds the stationary value 1.5 fold. |
| File Size | 27561815 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780005004 |
| Archival Resource Key | ark:/13960/t5bc8s032 |
| Language | English |
| Publisher Date | 1977-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Lunar Temperature Thermal Conductivity Lunar Evolution Lunar Core Radioactive Isotopes Lunar Exploration Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
