On the radiogenic heat production of metamorphic, igneous, and sedimentary rocks

Hasterok, Derrick; Gard, Matthew; Webb, Jonathan K.

doi:10.1016/j.gsf.2017.10.012

Cited by 88 publications

(79 citation statements)

References 29 publications

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“…Furthermore, geophysical models use simple layered crustal models (one‐ to two‐layered crust) that field studies of heat production heterogeneity have repeatedly shown are not geologically realistic (Burton‐Johnson et al, ; Carson et al, ; Hasterok et al, ; Sandiford et al, ). The models apply either constant thermal conductivity through a single crustal layer and assume laterally uniform crustal heat production (An et al, ), or an exponential relationship of decreasing heat production with depth (Martos et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…However, they contain varying assumptions about the lithospheric structure and composition, including the application of uniform values of radiogenic heat production for the upper and lower crust, or an exponential relationship of heat production with depth. These assumptions are not representative of the heat production sampled from numerous lithologies that constitute upper crustal rocks, neither in Antarctica (Burton-Johnson et al, 2017;Carson et al, 2014) nor globally (Gard et al, 2019;Hasterok et al, 2018). Heat producing elements (HPEs) are responsible for heat produced within the crust and preferentially concentrate into felsic rocks, but their distribution within these felsic rocks varies both spatially and temporally (Jaupart & Mareschal, 2003;McLaren et al, 2003;Perry et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Heat Flow in Southern Australia and Connections With East Antarctica

Pollett

Hasterok

Raimondo

et al. 2019

Geochem Geophys Geosyst

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Key Points First heat flow measurements from the Coompana Province, southern Australia, indicate values of 40–70 mW/m2 (57 ± 3 mW/m2 average) A tectonically reconstructed heat flow map constrains the thermal regime of geological provinces formerly contiguous with East Antarctica Geophysical models of Antarctic heat flow are likely underestimating crustal sources of radiogenic heat that influence subglacial melting

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat Flow in Southern Australia and Connections With East Antarctica

Pollett

Hasterok

Raimondo

et al. 2019

Geochem Geophys Geosyst

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“…13 shows the fitted heat production values, for each crustal column. Their distribution is skewed toward low values, resembling the empirically observed asymmetrical distribution of rock heat production values (Vilà et al 2010;Artemieva et al 2017;Hasterok & Webb 2017), which has been modelled with a log-normal distribution sometimes (e.g. Jokinen & Kukkonen 1999;Huang et al 2013).…”

Section: Iterative Forward Modelling Outputmentioning

confidence: 58%

“…Lacking direct measurements of radioactive heat production (RHP) throughout the whole crust thickness, estimates commonly rely on compilations of compositional data (Vilà et al 2010;Artemieva et al 2017;Hasterok & Webb 2017;Hasterok et al 2017).…”

Section: Iterative Fit Of Heat Generationmentioning

confidence: 99%

“…by thickness-weighted averaging of the three crustal layers. We did so in order to compare our result to the density to heat production relationship provided by Hasterok & Webb (2017): log 10 A = −0.0027(ρ − 2700) + 0.53 (plotted in black). In contrast to our indirect estimates, their results are based on geochemical data of more than 100 000 samples.…”

Section: Iterative Forward Modelling Outputmentioning

confidence: 99%

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A geothermal application for GOCE satellite gravity data: modelling the crustal heat production and lithospheric temperature field in Central Europe

Pastorutti

Braitenberg

2019

Geophysical Journal International

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SUMMARY Since the completion of the Gravity field and steady-state Ocean Circulation Explorer mission (GOCE), global gravity models of uniform quality and coverage are available. We investigate their potential of being useful tools for estimating the thermal structure of the continental lithosphere, through simulation and real-data test in Central-Eastern Europe across the Trans-European Suture Zone. Heat flow, measured near the Earth surface, is the result of the superposition of a complex set of contributions, one of them being the heat production occurring in the crust. The crust is enriched in radioactive elements respect to the underlying mantle and crustal thickness is an essential parameter in isolating the thermal contribution of the crust. Obtaining reliable estimates of crustal thickness through inversion of GOCE-derived gravity models has already proven feasible, especially when weak constraints from other observables are introduced. We test a way to integrate this in a geothermal framework, building a 3-D, steady state, solid Earth conductive heat transport model, from the lithosphere–asthenosphere boundary to the surface. This thermal model is coupled with a crust-mantle boundary depth resulting from inverse modelling, after correcting the gravity model for the effects of topography, far-field isostatic roots and sediments. We employ a mixed space- and spectral-domain based forward modelling strategy to ensure full spectral coherency between the limited spectral content of the gravity model and the reductions. Deviations from a direct crustal thickness to crustal heat production relationship are accommodated using a subsequent substitution scheme, constrained by surface heat flow measurements, where available. The result is a 3-D model of the lithosphere characterised in temperature, radiogenic heat and thermal conductivity. It provides added information respect to the lithospheric structure and sparse heat flow measurements alone, revealing a satisfactory coherence with the geological features in the area and their controlling effect on the conductive heat transport.

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