Heat-producing crust regulation of subsurface temperatures: A stochastic model re-evaluation of the geothermal potential in southwestern Queensland, Australia

Siegel C., Schrank C.E., Bryan S.E., Beardsmore G.R. and Purdy D.J. (2014) Heat-producing crust regulation of subsurface temperatures: A stochastic model re-evaluation of the geothermal potential in southwestern Queensland, Australia. Geothermics, 51 182-200. doi:10.1016/j.geothermics.2014.01.005


Author Siegel C.
Schrank C.E.
Bryan S.E.
Beardsmore G.R.
Purdy D.J.
Title Heat-producing crust regulation of subsurface temperatures: A stochastic model re-evaluation of the geothermal potential in southwestern Queensland, Australia
Journal name Geothermics   Check publisher's open access policy
ISSN 0375-6505
1879-3576
Publication date 2014-07-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.geothermics.2014.01.005
Open Access Status Not Open Access
Volume 51
Start page 182
End page 200
Total pages 19
Place of publication Oxford United Kingdom
Publisher Pergamon
Language eng
Abstract A large subsurface, elevated temperature anomaly is well documented in Central Australia. High heat producing granites (HHPGs) intersected by drilling at Innamincka are often assumed to be the dominant cause of the elevated subsurface temperatures, although their presence in other parts of the temperature anomaly has not been confirmed. Geological controls on the temperature anomaly remain poorly understood. Additionally, methods previously used to predict temperature at 5. km depth in this area are simplistic and possibly do not give an accurate representation of the true distribution and magnitude of the temperature anomaly. Here we re-evaluate the geological controls on geothermal potential in the Queensland part of the temperature anomaly using a stochastic thermal model. The results illustrate that the temperature distribution is most sensitive to the thermal conductivity structure of the top 5. km. Furthermore, the results indicate the presence of silicic crust enriched in heat producing elements between 5 and 40. km.
Keyword Australia
Geothermal
Heat flow
Inversion modelling
Stochastic modelling
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
 
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