Coprolite Phosphatic Content Bulk Estimate
Report a background-corrected equivalent phosphate-mineral mass on caller phosphorus stoichiometry; signed nondetections and values above physical mass fraction are model diagnostics, not actual mineral identification or coprolite authenticity.
Description
Phosphorus excess can be expressed as an equivalent phosphate-mineral mass if a composition is assumed.
Phosphorus excess can be expressed as an equivalent phosphate-mineral mass if a composition is assumed. That equivalent need not be a physical mineral identification.
Report a background-corrected equivalent phosphate-mineral mass on caller phosphorus stoichiometry; signed nondetections and values above physical mass fraction are model diagnostics, not actual mineral identification or coprolite authenticity.
When to use Coprolite Phosphatic Content Bulk Estimate
Use this tool to report a background-corrected equivalent phosphate-mineral mass on caller phosphorus stoichiometry; signed nondetections and values above physical mass fraction are model diagnostics, not actual mineral identification or coprolite authenticity.
Prepare the fossil measurements or occurrence records and the chosen calibration parameters. Retain the stated coordinate, age and measurement conventions.
How to use Coprolite Phosphatic Content Bulk Estimate and understand its results
- Prepare the fossil measurements or occurrence records and the chosen calibration parameters. Retain the stated coordinate, age and measurement conventions.
- Enter coproliteDryMassGrams, measuredPhosphorusMassPercent, backgroundPhosphorusMassPercent, phosphateMineralPhosphorusMassFraction using the field table and calculation rules, then run the tool.
- Read backgroundCorrectedPhosphorusMassGrams, modelEquivalentPhosphateMassGrams, modelEquivalentPhosphateDryMassPercent. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| coproliteDryMassGrams | Coprolite dry mass grams | number | Required |
| measuredPhosphorusMassPercent | Measured phosphorus mass percent | number | Required |
| backgroundPhosphorusMassPercent | Background phosphorus mass percent | number | Required |
| phosphateMineralPhosphorusMassFraction | Phosphate mineral phosphorus mass fraction | number | Required |
Use positive dry mass and mineral phosphorus fraction in (0,1], with assays in [0,100]. Preserve negative corrected mass and equivalent percentages above 100 as diagnostics.1
equivalent phosphate = dry sample × (measured P% − background P%)/100/mineral P fraction Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| backgroundCorrectedPhosphorusMassGrams | Background corrected phosphorus mass grams | number |
| modelEquivalentPhosphateMassGrams | Model equivalent phosphate mass grams | number |
| modelEquivalentPhosphateDryMassPercent | Model equivalent phosphate dry mass percent | number |
{
"input": {
"coproliteDryMassGrams": 10,
"measuredPhosphorusMassPercent": 3,
"backgroundPhosphorusMassPercent": 1,
"phosphateMineralPhosphorusMassFraction": 0.2
},
"output": {
"backgroundCorrectedPhosphorusMassGrams": 0.2,
"modelEquivalentPhosphateMassGrams": 1,
"modelEquivalentPhosphateDryMassPercent": 10
}
}Limitations and assumptions
No coprolite authenticity or actual mineral phase is established.
Numbers and computed results must be finite; overflow produces an error. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Manganese Staining Coverage Percent: Aggregate caller identified manganese stain coverage from bone masks with physical pixel-area correction; staining chemistry, mineral identity and depositional history remain external. For a complementary task, use Mg/Ca Paleothermometry: Invert caller Mg/Ca=A exp(B T_C) with calibration-domain guard and ratio-only uncertainty; units/taxon/calcification-depth and dissolution effects remain explicit external assumptions.
References
Similar or alternative tools
- Manganese Staining Coverage Percent
Aggregate caller identified manganese stain coverage from bone masks with physical pixel-area correction; staining chemistry, mineral identity and depositional history remain external.
- Mg/Ca Paleothermometry
Invert caller Mg/Ca=A exp(B T_C) with calibration-domain guard and ratio-only uncertainty; units/taxon/calcification-depth and dissolution effects remain explicit external assumptions.