Geology Helium Age Correction Alpha Ejection Calculator
Simple independent FTalpha-retention division age/FT, not derive FTfrom grain shape, correct zoning/diffusion or resolve parent/helium production.
Description
Alpha-ejection age correction uses an independently established helium-retention fraction.
Alpha-ejection age correction uses an independently established helium-retention fraction.1
It does not independently resolve diffusion or thermal-history effects. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Geology Helium Age Correction Alpha Ejection Calculator
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the sample and coordinate basis, matching units, calibration source and applicable model assumptions.
How to use Geology Helium Age Correction Alpha Ejection Calculator and understand its results
- Establish the sample and coordinate basis, matching units, calibration source and applicable model assumptions.
- Enter actualUncorrectedHeliumAgeYears, callerIndependentAlphaRetentionFraction, using the field meanings and rules below, then run the tool.
- Read result.conditionalAlphaEjectionCorrectedAgeYears. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualUncorrectedHeliumAgeYears | Actual uncorrected helium age years | number | Required |
| callerIndependentAlphaRetentionFraction | Caller independent alpha retention fraction | number | Required |
Require nonnegative uncorrected age in years and retention fraction in (0,1]. Divide age by retention; zero age remains zero and fraction zero fails. No retention or thermal-history model is derived.
correctedAgeYears=uncorrectedAgeYears/alphaRetentionFraction Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.conditionalAlphaEjectionCorrectedAgeYears | Conditional Alpha Ejection Corrected Age Years; use the units, sign convention and calculation stated above | number |
{
"input": {
"actualUncorrectedHeliumAgeYears": 100,
"callerIndependentAlphaRetentionFraction": 0.8
},
"output": {
"result": {
"conditionalAlphaEjectionCorrectedAgeYears": 125
}
}
}Limitations and assumptions
It does not independently resolve diffusion or thermal-history effects. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Geology Helium Diffusion Coefficient Calculator to examine a related aspect: Helium diffusion can be modeled by a mineral-specific Arrhenius relation.
Use Geology U Th He Age Calculator where its separate inputs and scope apply: U–Th–He dating depends on parent history, helium production and retention.
References
Similar or alternative tools
- Geology Helium Diffusion Coefficient Calculator
Helium diffusion can be modeled by a mineral-specific Arrhenius relation.
- Geology U Th He Age Calculator
U–Th–He dating depends on parent history, helium production and retention.