The accepted values for the internal Geological Survey of Canada (GSC) 9107 Rock-Eval 6 standard (Upper Cretaceous Second White Speckled Shale, Colorado Group), western Canada
Bibliographic record
Abstract
Exploration of conventional/unconventional hydrocarbon resources relies on detailed analysis of source/reservoir rocks. Rock-Eval analysis is one of the major methods in screening and characterizing the organic matter type and quantity, thermal maturity, and hydrocarbon potential of sedimentary rocks (Lafargue et al., 1998). In addition, Rock-Eval analysis is also widely used for characterization of organic matter in recent sediments and soil in wide range of environmental and soil fertility studies (e.g., Sanei et al., 2005; Carrie et al., 2012). Fundamentals of Rock- Eval analysis are provided in detail in Lafargue et al. (1998) and Behar et al. (2001). In order to determine the accuracy and precision of analysis, a formally certified standard reference material is typically analysed concurrently with samples to assure the consistency of measured data. However, no commercially available certified reference materials have been characterized for the parameters measured during Rock-Eval analysis. Instead, the Geological Survey of Canada (GSC) Organic Geochemistry Laboratory uses an internal prepared standard (9107) that was calibrated against a rock standard provided by the instrument manufacturer. That standard was developed by using various gravimetric approaches and external calibration of the Rock-Eval flame ionization (hydrocarbons) and thermal conductivity or infrared (CO and CO2) detectors. The 9107 standard is from the Upper Cretaceous Second White Speckled Shale, Colorado Group in western Canada, which is regarded as a typical marine hydrocarbon source rock. This standard is run in a sample batch of 10 to 15 unknown samples to verify the analytical performance of Rock-Eval instrument and ensure the consistency of generated data throughout series of analyses. This report presents the summary results of more than 2000 runs of the 9107 standard since the deployment of three completely refurbished Rock-Eval 6 instruments at the GSC in 2007documenting the accepted values of selected measured Rock-Eval 6 parameters and measurement precision and margin of error for the 9107 standard.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.009 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.006 | 0.010 |
| Science and technology studies | 0.005 | 0.002 |
| Scholarly communication | 0.004 | 0.002 |
| Open science | 0.004 | 0.002 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.069 | 0.028 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".