Lower Paleozoic foreland basins in eastern Canada: tectono-thermal events recorded by faults, fluids and hydrothermal dolomites
Bibliographic record
Abstract
Research Article| March 01, 2010 Lower Paleozoic foreland basins in eastern Canada: tectono-thermal events recorded by faults, fluids and hydrothermal dolomites Denis Lavoie; Denis Lavoie Geological Survey of Canada, Québec Division, 490 de la Couronne, Québec City, QC G1K 9A9, delavoie@nrcan.gc.ca Search for other works by this author on: GSW Google Scholar Guoxiang Chi Guoxiang Chi Department of Geology, University of Regina, 3737 Wascana Parkway, Regina, SK S4S 0A2, guoxiang.chi@uregina.ca Search for other works by this author on: GSW Google Scholar Bulletin of Canadian Petroleum Geology (2010) 58 (1): 17–35. https://doi.org/10.2113/gscpgbull.58.1.17 Article history accepted: 04 Mar 2010 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Denis Lavoie, Guoxiang Chi; Lower Paleozoic foreland basins in eastern Canada: tectono-thermal events recorded by faults, fluids and hydrothermal dolomites. Bulletin of Canadian Petroleum Geology 2010;; 58 (1): 17–35. doi: https://doi.org/10.2113/gscpgbull.58.1.17 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 SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract Dolomites in Lower and Middle Ordovician and Lower Silurian carbonates in Anticosti and Gaspé, respectively, are documented petrographically and geochemically to originate from early replacement and later void-filling phases, both derived from high temperature brines. These dolomite-rich intervals are interpreted as hydrothermal dolomites that formed during the early phases of foreland basin development along the continental margin of Laurentia; the Ordovician examples are related to the Taconian Orogeny whereas the Lower Silurian one is associated with the Salinic Orogeny.The dolomitization of the Lower and Middle Ordovician carbonates on Anticosti platform occurred shortly after the demise of shallow marine carbonate sedimentation in early Late Ordovician, at a time of significant increase of subsidence rates and associated higher geothermal gradients along the entire continental margin of Laurentia. Two geochemically different fluids are documented; the differences could be related to more pronounced rock-water interactions for the Lower Ordovician carbonates. The dolomitization of the Lower Silurian carbonates on Gaspé Peninsula is demonstrated to be an early event, pre-Late Silurian, which occurred during a significant magmatic period and likely high geothermal gradients. The Lower Silurian hydrothermal dolomites record significant exchanges between the high temperature fluid and the mafic to ultramafic basement that supplied large volumes of Mg+2 needed for this regional alteration.This paper illustrates the tectonic link between active foreland basin and hydrothermal dolomite. Moreover, the efficiency of fault-controlled circulation related to upward thermal convection of dolomitizing fluids is possibly enhanced at times of significant magmatic and thermal episodes along the continental convergent margins. 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 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 | 0.001 | 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) | 0.002 | 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".