Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny
Bibliographic record
Abstract
Research Article| October 01, 2007 Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny R.G. Berman; R.G. Berman 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Search for other works by this author on: GSW Google Scholar W.J. Davis; W.J. Davis 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Search for other works by this author on: GSW Google Scholar S. Pehrsson S. Pehrsson 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information R.G. Berman 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada W.J. Davis 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada S. Pehrsson 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Publisher: Geological Society of America Received: 02 Feb 2007 Revision Received: 21 May 2007 Accepted: 25 May 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2007) 35 (10): 911–914. https://doi.org/10.1130/G23771A.1 Article history Received: 02 Feb 2007 Revision Received: 21 May 2007 Accepted: 25 May 2007 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation R.G. Berman, W.J. Davis, S. Pehrsson; Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny. Geology 2007;; 35 (10): 911–914. doi: https://doi.org/10.1130/G23771A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The ∼2800-km-long Snowbird tectonic zone is one of the most controversial tectonic features of the Canadian shield. Metamorphic and in situ geochronologic data reported here reveal that a 1.9 Ga medium- to high-pressure belt extends along most of this tectonic zone. In contrast to recent interpretations, a collisional origin is indicated by the length of this metamorphic belt, tectonic thickening documented in parts of it, geological contrasts across it, and subduction-type microdiamonds within it. This collisional event marks a pre–1.865 Ga phase of the Hudsonian orogeny involving microcontinent accretion that was fundamental to the growth of Laurentia. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| 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 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".