Bibliographic record
Abstract
Isomerizations of methyldibenzothiophene from Neogene mudstones in northeast Japan were examined as a maturity parameter of organic matter during the diagenesis to catagenesis stage．The relationship between methyldibenzothiophene（MDBT）ratio（MDR：4-MDBT/1-MDBT）and vitrinite reflectance（Ro）from the Tojo TS-1 well，which underwent subsidence at low heating rate，can be described by the equation：MDR=15.1 Ro-5.35（n=11，r=0.85，Ro=0.4-0.7%）．This equation is similar to that from Elmworth 6-28-68-13 W 6 M in Western Canada．New combination of the 1-MDBT，（2- ＋ 3-）MDBT and 4-MDBT isoomers are used to be a new maturity parameter which is useful in the high maturity stage，up to 3% Ro．The ratio（2- ＋ 3-）MDBT to（1- + 2- + 3- + 4-）MDBT increases from 0.2 to 0.6 over the range 0.4-3.0% Ro．The ratio（2- + 3-）MDBT to 4-MDBT was constant at about 0.5 in the range 0.4-1.5% Ro，and then increases from 0.5 to 4.5 in the range 1.5-2.9% Ro．Therefore，the（2- + 3-）/（1- + 2- + 3- + 4-）MDBT ratio is possibly on effective maturity indicator through the oil generation stage to higher maturity stages such as the dry gas zone．After the catagenesis stage，（2- ＋ 3-）/（4-）MDBT ratio and high Ro gradients could assist interpretation of scattered（2- ＋ 3-）/（1- + 2- + 3- + 4-）MDBT ratios with low gradient．
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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".