Holocene earthquake-triggered submarine landslides and turbidites in western Baffin Bay
Bibliographic record
Abstract
Although northern Baffin Bay is recognized as one of the most active seismic zones in Canada, there is limited evidence of Holocene earthquake-triggered mass transport deposits (MTDs) or turbidites in the marine record. Here, we present a record of MTDs and turbidites in two areas of Baffin Bay where earthquakes are the most likely triggering mechanism. Our study focuses on a submarine channel system in Scott Trough (proximal to the Baffin Bay seismic zone—BBSZ) and on MTDs identified from the Home Bay slope, distal to the BBSZ. The channel system in Scott Trough is a sediment-starved relict system from deglaciation, which is now at 200 m water depth, precluding many turbidity current triggers normally associated with active submarine channels. Instead, we propose that the Holocene turbidites in Scott Trough are a result of seismic activity. This hypothesis is supported by the presence of a turbidite dated at ca 1933 CE resulting from an M 7.4 earthquake. Three other turbidites are recorded in the Scott Trough channel system at ca 9.3, 4.3–3.6, and 2.4 cal ka B.P. In Home Bay, two distinct MTDs were dated at just older than 9.1 cal ka B.P., which suggests they were triggered by an earthquake during post-glacial, glacio-isostatic adjustment. There is limited evidence for more recent Holocene MTDs in Home Bay, which is consistent with lower seismic activity in the region when compared to Scott Trough. These results provide convincing evidence for a marine record of Holocene earthquakes but should be considered an initial study upon which future Holocene sediment records can be compared.
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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 | 0.001 |
| 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 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".