Timeline for Is it plausible for a planet that is positioned in the habitable area of a solar system to have little extractable metals?
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| May 23, 2019 at 11:20 | comment | added | Peter Erwin | There is also the fact that some "extractable" metals heavier than iron are also produced by the s-process, and so do not depend as much on neutron-star mergers for their production. This is especially true for molybdenum, tin, tungsten, mercury, and lead, for example. | |
| May 23, 2019 at 11:15 | comment | added | Peter Erwin | Bartos & Marka actually estimate the Thorium-232 contribution from that (hypothetical) single recent, nearby neutron-star merger; it amounts to about 0.3% of the solar system's initial Thorium-232. (They are assuming, sensibly, that "stale" r-process material diffuses through the galaxy and cannot remain "blotchy" for very long.) Since U-238's half-life is about 1/3 of Th-232's, there would be a very high fraction of "stale" U-238 as well. | |
| May 22, 2019 at 13:15 | history | answered | Martin Kochanski | CC BY-SA 4.0 |