Could ancient lead minerals reveal invisible dark matter?

Paleodetectors search for dark matter by finding microscopic damage trails in ancient minerals—but most existing minerals are too light to register collisions with inelastic dark matter like Higgsinos. This work proposes using heavy elements, especially lead from deep geothermal brines, which can capture collisions from Higgsinos up to 920 keV in mass splitting. The approach gains sensitivity to a faster dark matter population possibly created when the Large Magellanic Cloud approached 50 million years ago, and notably works even with younger, less pristine samples.