Cadmium and Chromium Isotope Signatures of Metalliferous Black Shales – Addressing Bioproductivity and Ocean Redox During the Precambrian-Cambrian Transition on the Yangtze Platform, China.

Robert Frei1, Bernd Lehmann2, Lingang Xu3, Jesper Allan Frederiksen4 and Elias John Rugen4, (1)University of Copenhagen, Geosciences and Natural Resource Management, København K, Denmark, (2)Technische Univ, Clausthal Zellerfeld, Germany, (3)China University of Geosciences, School of Earth Sciences and Resources, Beijing, China, (4)University of Copenhagen, Geosciences and Natural Resource Management, Copenhagen, Denmark