Integrated diagenetic, structural and paleomagnetic study of remagnetized folded Mississippian-Triassic units from the Southern Canadian Cordillera, Alberta and British Columbia
Bibliographic record
Abstract
Determining the timing and origin of fluid-related diagenetic events relative to orogenesis is crucial for understanding the interaction between orogenesis and diagenesis. Two folds in Mississippian carbonates (Line Creek anticline and Mt. Kidd anticline/syncline) and one fold in Pennsylvanian-Triassic units (Kent anticline) was investigated in the Southern Canadian Cordillera to test for a link between fluid flow, hydrocarbon migration/alteration and the formation of a multi-component remagnetization. This issue was investigated using an integrated diagenetic, structural and paleomagnetic approach. Geochemical, petrographic and fluid inclusion analysis was used to determine the nature of the diagenetic events while combined rock magnetic and paleomagnetic analysis was used to determine the magnetic carriers and age of both a high temperature and intermediate temperature chemical remanent magnetization (HTCRM and ITCRM, respectively). The timing of the HTCRM, contained in magnetite, is Early Cretaceous (~Aptian) and pre-tilting at Line Creek, although is inconclusive at Mt. Kidd due to its syn-tilting nature. The ITCRM is post tilting and Late Tertiary at Mt. Kidd, although is inconclusive at Line Creek due to its syn-tilting result A bedding parallel vein contact test shows direct correlation to the total component magnetic intensity of the HTCRM while a tectonic vein contact test shows a correlation to the total component intensity of the ITCRM. Elevated 87Sr /86Sr data indicates that the rocks have been altered by radiogenic fluids. C/O isotopes show evidence for a wide range warm fluids which is confirmed by fluid inclusion homogenization temperatures (149-212°C). The geochemical and petrographic results are consistent with the interpretation that the HTCRM formed as a result of a regional migration of hydrocarbons and/or evolved basinal fluids. The ITCRM is interpreted to be the result of thermal sulfate reduction (TSR), caused by alteration of hydrocarbons, based on the observation of multiple by-products of TSR.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.016 | 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 teacher head, 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".