Core Recovery Run Length Gap Tool

Description

measuredRecovery = recoveredLength/runLength; possibleRecovery includes the fragmented amount; missingLength is the remainder.

Geological records use depth datums, age-before-present coordinates and recovery definitions. A signed difference or recovered-length ratio can expose a supplied inconsistency without reconstructing geological history or correcting sample loss.

measuredRecovery = recoveredLength/runLength; possibleRecovery includes the fragmented amount; missingLength is the remainder.

When to use this tool

Use Core Recovery Run Length Gap when checking an explicit geological coordinate, interval or recovery convention.

How to use the tool and how it works

Enter runLength, recoveredLength, fragmentedUnmeasuredLength. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read measuredRecovery, possibleRecovery, missingLength. Use the output convention below.

Require positive runLength and nonnegative recoveredLength and fragmentedUnmeasuredLength with their sum <= runLength. measuredRecovery = recoveredLength/runLength; possibleRecovery includes the fragmented amount; missingLength is the remainder.^[1]

Input field	Meaning and units	Accepted input
runLength	Run Length	Required. Finite number; strictly above 0.
recoveredLength	Recovered Length	Required. Finite number; minimum 0.
fragmentedUnmeasuredLength	Fragmented Unmeasured Length	Required. Finite number; minimum 0.

Output field	Interpretation	Returned shape
measuredRecovery	Measured Recovery	Required. Finite number.
possibleRecovery	Possible Recovery	Required. Finite number.
missingLength	Missing Length	Required. Finite number.

json

{
  "input": {
    "runLength": 10,
    "recoveredLength": 8,
    "fragmentedUnmeasuredLength": 1
  },
  "output": {
    "measuredRecovery": 0.8,
    "possibleRecovery": 0.9,
    "missingLength": 1
  }
}

Limitations and assumptions

The fragmented quantity is supplied as an additional possible recovered length, not double-counted measured material. Bounds are accounting scenarios rather than confidence limits.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use verified datums, original logs and appropriate geological interpretation when correlating units or reconstructing missing intervals.

References

Calculation and input contract: earth-science/core-recovery-run-length-gap — tool.io

Similar or alternative tools

Core Recovery Length Ratio
countedLength = recoveredLength-excludedRecoveredLength; ratio = countedLength/runLength.
Core Section Depth Recovery Gap
drilledLength = bottomDepth-topDepth; unrecoveredLength = drilledLength-recoveredLength; recoveryFraction = recoveredLength/drilledLength.