A global Curie depth model utilising the equivalent source magnetic dipole method

Gard, Matthew; Hasterok, Derrick

doi:10.1016/j.pepi.2021.106672

Cited by 31 publications

(29 citation statements)

References 51 publications

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“…However, the Curie depth estimated from magnetic data has large differences among different studies. Recent study show that Curie depth differs by as much a ±20 km among different models (Figures 10a and 10c; Gard & Hasterok, 2021). Furthermore, the Curie temperature of different magnetic minerals varies greatly.…”

Section: Discussionmentioning

confidence: 93%

Three‐Dimensional Thermal Structure of East Asian Continental Lithosphere

et al. 2022

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The East Asian continent was formed by multiple Precambrian cratons and orogenic belts through its geological history (Figure 1a). In the Mesozoic, the eastern part of East Asia deformed in response to the subduction of the Paleo-Pacific Plate (Li et al., 2019). Some stable blocks, such as the North China Craton (NCC), were thermally rejuvenated (Zhu et al., 2011). The Cenozoic tectonics of East Asia has been dominated by the India-Eurasian collision, which led to the formation of the Tibetan Plateau (Yin & Harrison, 2000). The diffuse deformation and volcanism make East Asia one of the best examples of complex intracontinental tectonics. Temperature, which controls rock rheology and magmatism, is a key for understanding such continental tectonics (Artemieva, 2006). However, the three-dimensional thermal structure of East Asian lithosphere remains uncertain.Direct measurements of lithospheric temperature at depth are not feasible. However, it is possible to indirectly estimate the temperature of continental lithosphere (Goes et al., 2000). In one approach, the lithospheric temperature is calculated by solving the steady-state heat conduction equation based on the near-surface heat flow, thermal conductivity, and heat production data (Artemieva & Mooney, 2001;Artemieva, 2019). This method is reasonably accurate for stable cratons where the assumption of steady-state conductive heat transfer holds. But errors may occur for Cenozoic orogenic belts, where steady-state conduction within the lithosphere may have not been reached. Compared with other methods, this method is more accurate for near-surface temperature. For the

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Section: Discussionmentioning

confidence: 93%

Three‐Dimensional Thermal Structure of East Asian Continental Lithosphere

et al. 2022

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“…Global Curie temperature depth (CTD) is obtained from Gard and Hasterok (2021). Upper mantle velocity models may shed light on the mantle and lithospheric components of the GHF (Shapiro and Ritzwoller, 2004).…”

Section: Geological and Geophysical Datamentioning

confidence: 99%

A geothermal heat flow model of Africa based on Random Forest Regression

Al-Aghbary¹,

Sobh²,

Gerhards³

2022

Preprint

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We generate a geothermal heat flow model over Africa using random forest regression basedon sixteen different geophysical and geological quantities (among them are Moho depth, Curietemperature depth, gravity anomalies, topography, and seismic wave velocities). The training of the random forest is based on direct heat flow measurements collected in the compilation of Lucazeau (2019). The final model reveals structures that are consistent with existing regional geothermal heat flow information. It is interpreted with respect to the tectonic setup of Africa, and the influence ofthe selection of training data and target observables is illustrated in the supplementary material

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“…Recently Gard and Hasterok (2021) have determined the Curie depth globally using the satellite data based lithospheric magnetic field model LCS-1 (cf. Olsen et al, 2017), applying the equivalent source magnetic dipole method.…”

Section: Curie Depth Compared With Magnetic and Geological Settingmentioning

confidence: 99%

“…Deriving heat flow from such indirect information is important due to only sparsely available direct heat flow measurements (Li et al, 2017). It can be used to constrain other models of thermally controlled properties and processes (Gard & Hasterok, 2021). The obtained surface heat flow models are subsequently compared to the available direct heat flow measurements over southern Africa.…”

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Mapping the thermal structure of southern Africa from Curie depth estimates based on wavelet analysis of magnetic data with uncertainties

Sobh

Gerhards

Götze

et al. 2021

Preprint

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Estimating the spatial variations in the temperature within the Earth is important to constrain the thermal structure and the rheology of the lithosphere (Audet & Gosselin, 2019). Curie depth estimates, which correspond to the depth where crustal rocks reach their Curie temperature (∼580 • C for magnetite; Dunlop & Özdemir, 2001) give independent temperature constraints over an area where magnetic anomaly data are available. Above the Curie temperature, the ability of rocks to preserve ferromagnetic magnetism

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A global Curie depth model utilising the equivalent source magnetic dipole method

Cited by 31 publications

References 51 publications

Three‐Dimensional Thermal Structure of East Asian Continental Lithosphere

Three‐Dimensional Thermal Structure of East Asian Continental Lithosphere

A geothermal heat flow model of Africa based on Random Forest Regression

Mapping the thermal structure of southern Africa from Curie depth estimates based on wavelet analysis of magnetic data with uncertainties

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