Julia Creek shale

Results are reported here for experiments made on a Sydney basin oil shale from Glen Davis and on a Julia Creek shale and its demineralized organic residue. These specimens were obtained from CSIRO Division of Fossil Fuels and CSIRO Division of Energy Chemistry respectively. We do - not have analyses of these specimens but they are considered typical of the particular deposits, H/C ratios of 1.52 and 1.4 and 0/C ratios of 0.04 and 0.8 for Glen Davis and Julia Creek kerogens respectively have been published (8) ... 

This comparison of the whole and demineralized Julia Creek shales shows that although the degree of molecular mobility of the material softened during the heating is inhibited by the presence of the inorganic material it does not have much effect on the eventual thermal decomposition of the organic material. 

TABLE 1. METAL-ORGANIC COMPLEXES EXTRACTABLE WITH CHLOROFORM FROM JULIA CREEK SHALE... 

Figure 2. The 1 H-NMR signals of a Glen Davis (top) and a Julia Creek (bottom) oil shale are shown atfour instances during heating at 4 K/ min. The signals for the original shale (l), that near maximum molecular mobility (3), and that of the char residue at high temperature (4) are included.

Figure 3b. The apparent hydrogen content and differential hydrogen content parameters of Julia Creek (top) and demineralized Julia Creek (bottom)from H-NMR thermal analyses of oil shales. Heating rate, 4 K/min in a nitrogen atmosphere.

Examples of the temperature dependence of M are shown in Figure 5a and Figures 5h and 5c for Glen Davis shale and for Julia Creek and Julia Creek demineralized shales, respectively. 

Petroporphyrins Found in Oil Shale from the Julia Creek Deposit of the Toolebuc Formation... 

The oil shale of the Julia Creek deposit has been shown to contain a very complex mixture of vanadium porphyrin compounds. Several groups of compounds were isolated by column chromatography and high pressure liquid chromatography and examined by ultra-violet-visible spectroscopy, insertion probe, fast atom bombardment and field desorption mass spectrometry. These groups of compounds were found to consist of several homologous series, and included some compounds tentatively identified as phylloerythrin and chlorin derivatives. 

Samples from two drill cores from the Julia Creek deposit were ground and sieved, the -90ym fraction being used. Samples of 15-20 g were exhaustively extracted with chloroform in soxhlet extractors. The extract was filtered through a Millipore filter, and analysed for V, Ni, Fe and Cu. Atomic absorption, inductively-coupled plasma emission and X-ray fluorescence spectrometry were used to analyse both the extracts and the raw shale. 

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