Sodic granitoids and felsic gneisses associated with uranium-thorium mineralisation, Crockers Well, South Australia

Chemical and microstructural characterisation studies on natural and heat treated brannerite samples

“…5d) while the thorianite-uraninite typically was present as smaller grains (inclusions) within brannerite. Energy Dispersive (ED) analysis of the brannerite indicated a composition rich in thorium, consistent with the Crockers Well brannerite commonly being reported as Thbrannerite (Whittle, 1954;Ashley, 1984;Lumpkin et al, 2012). Throughout the sample there was clear evidence for alteration of the Th-brannerite e.g.…”

Regional geochemistry and continental heat flow: implications for the origin of the South Australian heat flow anomaly

“…Units divided between the EGC and MPP (abbreviations as for Table I) and listed in geochronological order. Data from [35][36][37][38][39] and unpublished data. m-3 for tholeiitic basalts and 2.1 µW m-3 for shales, to 2.5 µW m-3 for granites [40,41].…”

“…4. Data from [35][36][37][38][39]; unpublished data. n = number of samples used to calculate average concentrations of U, Th and K20.…”

“…In order to evaluate this possibility, we have compiled all existing geochemical data for Archaean to Mesoproterozoic lithologies from South Australia. Heat production values have been calculated as present day averages from U, Th and K20 geochemical analyses (data from [35][36][37][38][39]; unpublished data). U, Th and K concentrations were obtained from whole rock powders using a X-ray fluorescence spectrometer.…”

“…[43]). The Nd isotopic record of Archaean-Mesoproterozoic granites from the SAHF A displays a large range in initial ENd from 2.8 to -11.1, suggesting considerable variations in the proportion and isotopic composition of crust and juvenile mantle material within these rocks [35][36][37][38][39]44]. Of particular interest are the initial ENd values of high heatproducing granites of the Mount Painter Province, which are quite high and show very limited variation from -3.2 to -0.5.…”