Helium Diffusion Closure Temperature Calculator
Solve the Dodson (1973) closure temperature for helium diffusion given activation energy, diffusion anisotropy and cooling rate.
Description
Solve the Dodson (1973) closure temperature for helium diffusion given activation energy, diffusion anisotropy and cooling rate.
Helium Diffusion Closure Temperature Calculator: Solve the Dodson (1973) closure temperature for helium diffusion given activation energy, diffusion anisotropy and cooling rate.
When to use Helium Diffusion Closure Temperature
Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.
- Activation energy
- Diffusion activation energy in kJ/mol.
- Anisotropy A
- Dodson geometry/diffusion anisotropy factor A.
- Cooling rate
- Cooling rate in kelvin per million years.
How Helium Diffusion Closure Temperature works
Solve the Dodson (1973) closure temperature for helium diffusion given activation energy, diffusion anisotropy and cooling rate. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- Closure T
- Closure temperature in degrees Celsius.
- Cooling rate
- Cooling rate converted to kelvin per second.
Limitations and assumptions
- Geological models are scale-, site-, method-, and calibration-dependent. Heterogeneity, anisotropy, sampling, diagenesis, pressure-temperature history, instrument response, boundary conditions, and empirical-correlation range can dominate the result.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.
References
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Geology — Wikipedia contributors
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