Trace metal speciation in Julia Creek oil shale.
The speciation of 16 trace elements in Julia Creek oil shale was estd. based on the comparative evaluation of 3 different models referring to various chem. digestion procedures. Demineralization steps were monitored by x-ray diffraction and x-ray fluorescence spectrometry, and the results discussed together with those reported in literature. Although it is possible to det. some enrichment of elements in the carbonate (e.g., Mn,Sr), in the silicate (e.g., Ti,V), and in the sulfide fractions (e.g., Cu,Ga,As), enrichments in the kerogen phase can only be estd. within a relatively broad range. Element distributions between different sedimentary phases seem to be very similar when comparing Julia Creek with other oil shales.
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