University of Tsukuba researchers found two processes immediately after the end-Cretaceous asteroid impact that likely supplied chalcophile elements to the ocean, i.e., impact heating and acid rain. The former produced iron oxides/hydroxides and released chalcophile elements from the struck rock. Iron oxides/hydroxides could have carried chalcophile elements to the seafloor. Acid rain could have supplied some chalcophile elements, especially copper and silver to the ocean, where they accumulated in organic matter.
Asteroid impact enriches certain elements in seawater
- 28. 2 2020 (06:00)