Constraints on the Tectonic Evolution of the Southern New River Terrane and its relationship to other terranes in Southern New Brunswick
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Bibliographic record
Abstract
The narrow, fault-bounded New River terrane contains the northwcstcrnmost exposures of Neoproterozoic rocks known in southern New Brunswick. Through mapping, structural, and petrological studies, this study has focused on unravelling relationships among Neoproterozoic and younger rocks in the southern part of the terrane. The Neoproterozoic rocks are here divided into the ea. 620 Ma Blacks Harbour Granodiorite and Beaver Harbour Porphyry, and the ea. 555 Ma units, which include both volcanic and co-magmatic high-level intrusive rocks. Both the ea. 620 Ma and ea. 555 Ma suites are shown here to exhibit chemical signatures characteristic of formation in continental margin subduction settings. The ea. 555 Ma units are overlain by, and in faulted contact with, Early - Middle Cambrian volcanic and siliciclastic rocks or the Simpsons Island and Mosquito Lake Road formations, and Silurian - Devonian sedimentary rocks of the Mascarene Group. The Blacks Harbour Granodiorite and Beaver I [arbour Porphyry are unconformably overlain by the Late Devonian Perry formation, and faulted against Cambrian sedimentary rocks of the Buckmans Creek formation. Most of the rock units in the southern New River terrane arc similar in age and petrology to units in the northern part of the terrane, and hence arc interpreted to be comagmatic with them. Broad similarities also exist between the New River terrane and other areas of southern New Brunswick, but making direct links remains enigmatic. The ea. 620 Ma and ea. 555 Ma volcanic arcs in the New River terrane are interpreted to have undergone separate deformational histories throughout the Early Paleozoic. and were juxtaposed along the Letang Harbour Fault - Robin Hood Lake Fault no earlier than Late Devonian.
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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) | 0.000 | 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) | 0.007 | 0.001 |
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 it