From the abstract of the paper the article is based on:<p>"
Our data indicate that the Chicxulub impactor was a carbonaceous-type asteroid, which had formed beyond the orbit of Jupiter. The five other impact structures have isotopic signatures that are more consistent with siliceous-type asteroids, which formed closer to the Sun. The ancient spherule layer samples are consistent with impacts of carbonaceous-type asteroids during Earth’s final stages of accretion.
"<p>The link to the paper itself: <a href="https://www.science.org/doi/10.1126/science.adk4868" rel="nofollow">https://www.science.org/doi/10.1126/science.adk4868</a>