What am I missing? I skimmed the linked PDF @ [0] and it doesn't paint a picture remotely resembling what's being described in the VICE article:

"We see that the isotopic compositions of these four specimens are indistinguishable: the isotopic composition of the Brazil magnesium is clearly compatible with terrestrial origin."

Is there another paper documenting the nanoSIMS analysis?

[0] https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.55...