Variations of Zn isotopes in phosphorites and their implications

Major, trace, and rare earth elements (whole rock and CFA mineral), as well as Zinc isotope data from Cenozoic phosphorites (samples taken from California Borderland, Chatham Rise, Blake Plateau, Peru Margin, and open-ocean seamounts phosphorites) and Permian phosphorites (samples taken from Meade Peak Member and Retort member phosphorites of the Permian Phosphoria Formation).