Re–Os molybdenite dates from the Ballachulish and Kilmelford Igneous Complexes (Scottish Highlands): age constraints for late Caledonian magmatism
Bibliographic record
Abstract
Abstract: New Re–Os molybdenite geochronology is presented from the Ballachulish Igneous Complex (433.5 ± 1.8 Ma) and the Kilmelford Igneous Complex (425.8 ± 1.7 Ma) of the SW Scottish Highlands. The sulphide mineralization in the Ballachulish Igneous Complex is related to the latest phase of granite magmatism, and therefore the new Re–Os age provides a minimum crystallization age, c . 3.7 Ma earlier than previous crystallization age estimates. This Re–Os age overlaps U–Pb ages obtained from subduction-related granitic and appinitic magmatism north of the Great Glen Fault, and an origin related to active subduction rather than slab breakoff is proposed for the Ballachulish Igneous Complex. Molybdenite mineralization in the Kilmelford Igneous Complex is spatially and genetically associated with porphyry Cu mineralization, which is consistent with the rapid ascent of volatile-rich magma during early rebound following the breakoff of subducted oceanic lithosphere. The Kilmelford Igneous Complex and the coeval Lorn Lava Pile may represent the earliest of the igneous bodies predicted by slab breakoff, indicating that slab breakoff occurred at c . 426 Ma.
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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 | 0.001 | 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 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".