jgs2016-145_si_003.png (201.83 kB)

Fig. C. Sm versus K concentrations. Geochemistry of Ediacaran cap dolostones across the Yangtze Platform, South China: implications for diagenetic modification and seawater chemistry in the aftermath of the Marinoan glaciation

Download (201.83 kB)
figure
posted on 04.05.2017 by Simon V. Hohl, Harry Becker, Shao-Yong Jiang, Hong-Fei Ling, Qingjun Guo, Ulrich Struck
Fig. C: Concentration of conservative behaving REE Sm versus K concentrations in acetic acid leachates of studied cap dolostones from the Yangtze Platform. No clear positive correlations are found. Red crosses mark samples that exceed Al concentrations of 0.35 wt.% and have non aqueous REE patterns (Y/Ho < 27; PrN/YbN > 1) arguing for the influence of silicate leaching. Increased concentrations in Al coincide with K concentrations greater 2200 µg/g (grey dashed line). For comparison the concentrations of carbonate reference material JLs-1 (pure limestone) and SDO-1 (shale) were plotted. If clay leaching plays a significant role the data points should plot on an expected trend line between the two pure "endmember" reference materials. (legend for data points can be found in Fig. 4)

History

Licence

Exports