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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gmd-2018-341
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2018-341
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Model description paper 04 Feb 2019

Model description paper | 04 Feb 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

Beo v1.0: Numerical model of heat flow and low-temperature thermochronology in hydrothermal systems

Elco Luijendijk Elco Luijendijk
  • Geoscience Centre, University of Göttingen, Goldschmidtstrasse 3, 37077, Göttingen, Germany

Abstract. Low-temperature thermochronology can provide records of the thermal history of the upper crust and can be a valuable tool to quantify the history of hydrothermal systems. However, existing model codes of heat flow around hydrothermal systems do not include low-temperature thermochronology. Here I present a new model code that simulates thermal history around hydrothermal systems on geological timescales. The modelled thermal histories are used to calculate apatite (U-Th)/He (AHe) ages, which is a thermochronometer that is sensitive to temperatures up to 70 °C. The modelled AHe ages can be compared to measured values in surface outcrops or borehole samples to quantify the history of hydrothermal activity. Heat flux at the land surface is based on equations of latent and sensible heat flux, which allows more realistic land surface and spring temperatures than models that use simplified boundary conditions. Instead of simulating fully coupled fluid and heat flow, the code only simulates advective and conductive heat flow, with the rate of advective fluid flux specified by the user. This relatively simple setup is computationally efficient and allows running larger numbers of models to quantify model sensitivity and uncertainty. Example case studies demonstrate the sensitivity of hot spring temperatures to the depth, width and angle of permeable fault zones, and the effect of hydrothermal activity on AHe ages in surface outcrops and at depth.

Elco Luijendijk
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Status: final response (author comments only)
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Elco Luijendijk
Model code and software

Beo: model heat flow and thermochronology in hydrothermal systems (Version v1.0) E. Luijendijk https://doi.org/10.5281/zenodo.2527845

Elco Luijendijk
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Latest update: 20 Jul 2019
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Short summary
This paper presents a new model code that can be used to date the flow of hot fluids in the crust and the age of hot springs. It does so by modeling the thermal effects of fluid flow in the subsurface and by comparing the results with low-temperature thermochronometers, which is a widely used method to quantify the temperature history of minerals and rocks. The model also demonstrates that the depth and angle of permeable faults have a strong effect on temperatures in hot springs.
This paper presents a new model code that can be used to date the flow of hot fluids in the...
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