Geology Sr Anomaly Calculator
Declared Sranomaly SrN/sqrt(CeN×NdN), not silently linear interpolation or Prneighbor convention. Same independently verified normalization reference required; not infer mineral source/age.
Description
A strontium anomaly depends on the adopted normalized-neighbor convention.
A strontium anomaly depends on the adopted normalized-neighbor convention.1
This implementation uses the geometric mean of normalized cerium and neodymium as its reference. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Geology Sr Anomaly 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 Sr Anomaly Calculator and understand its results
- Establish the sample and coordinate basis, matching units, calibration source and applicable model assumptions.
- Enter actualReferenceNormalizedSr, actualReferenceNormalizedCe, actualReferenceNormalizedNd, using the field meanings and rules below, then run the tool.
- Read result.observedGeometricCeNdSrAnomaly. 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 |
|---|---|---|---|
| actualReferenceNormalizedSr | Actual reference normalized sr | number | Required |
| actualReferenceNormalizedCe | Actual reference normalized ce | number | Required |
| actualReferenceNormalizedNd | Actual reference normalized nd | number | Required |
Require nonnegative normalized strontium and positive normalized cerium/neodymium. Divide Sr by sqrt(Ce×Nd), using the adopted geometric reference convention. No normalization reference is selected and this is not a universal Sr-anomaly definition.
SrAnomaly=SrN/sqrt(CeN×NdN) 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.observedGeometricCeNdSrAnomaly | Observed Geometric Ce Nd Sr Anomaly; use the units, sign convention and calculation stated above | number |
{
"input": {
"actualReferenceNormalizedSr": 2,
"actualReferenceNormalizedCe": 1,
"actualReferenceNormalizedNd": 4
},
"output": {
"result": {
"observedGeometricCeNdSrAnomaly": 1
}
}
}Limitations and assumptions
This implementation uses the geometric mean of normalized cerium and neodymium as its reference. 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 Ree Pattern Slope La Yb Calculator to examine a related aspect: Normalized La/Yb compares lanthanum and ytterbium relative to declared reference concentrations.
Use Geology Trace Element Ratio Calculator where its separate inputs and scope apply: Trace-element ratios compare matched concentration measurements.
References
-
Geology Sr Anomaly Calculator — tool.io
Similar or alternative tools
- Geology Ree Pattern Slope La Yb Calculator
Normalized La/Yb compares lanthanum and ytterbium relative to declared reference concentrations.
- Geology Trace Element Ratio Calculator
Trace-element ratios compare matched concentration measurements.