Using equipment kindly loaned to us by Geoscience Australia during a field break of their Geothermal measurement programme, the Western Australian Geothermal Centre of Excellence (WAGCoE) performed detailed thermal logging of 17 Artesian Monitoring bores in the Perth metropolitan area during June and July of 2010. The boreholes reach depths of up to 758 metres, and cut strata comprising several active aquifers in the Perth Sedimentary Basin. The Auslog A626 sonde used simultaneously measured temperature and Gamma logs, and we predominantly sampled on 5cm intervals. Temperature measurements were calibrated and reduced to match our internal standard. Calibrated downhole temperature measurements were also spatially filtered by convolving with a (low pass) Gaussian kernel using a 1 value of 50cm and normalised to unit area.

There are several confounding factors in interpreting the profiles. First

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