Bibliographic record
Abstract
OF 4930 - This Open file contains: (1) a geological bedrock compilation (1:500 000 scale); (2) planar and linear structural point data; (3) lithology and mineral assemblage data; (4) sample number, radiometric age, interpretation, dated material, and method for geochronology samples; (5) a comprehensive tectonostratigraphic legend for all Archean, Paleoproterozoic, and Neoproterozoic units and structures in the map area; (6) an up-to-date reference list for larger-scale source maps; and (7) key hydrographic features for the Cape Smith, Cap Wolstenholme, Cap de Nouvelle-France, and Joy Bay region, northern Ungava Peninsula, Quebec. The purpose of this Open File is to provide a complete, analogue and digital, internally consistent, and georeferenced collection of spatial data that will assist interested parties in mineral exploration, environmental studies, land use planning, and other investigations requiring up-to-date earth sciences information. The Open File map was compiled, modified and generalized from previously published Open File maps, A-series maps, and reports produced by the Geological Survey of Canada for the eastern, northern and extreme western portion of the Ungava Peninsula and adjacent islands, and SIGEOM maps published by the Ministère des ressources naturelles du Québec for the western portion of the peninsula. The map shows a variety of units of Archean to Neoproterozoic age, which can be grouped into the following bedrock tectonostratigraphic assemblages. In the southern portion of the map area, the lower-plate Archean Superior craton comprises dominantly felsic orthogneisses and plutonic units ranging in age between 3220+32/-23 - 2737±2 Ma. Unconformably overlying the felsic basement is a suite of parautochthonous basal clastic sedimentary units, carbonatitic volcaniclastic rocks, and continental tholeiitic flood basalt and rhyolite (Povungnituk Group) associated with initial Paleoproterozoic rifting of the northern Superior craton. These units have yielded ages between 2038+4/-2 - 1959+3.1/-2.7 Ma. Stratigraphically overlying the initial-rift sedimentary and volcanic rocks is a younger succession of predominantly komatiitic to tholeiitic basalts (Chukotat Group) accumulated during renewed rifting along the northern continental margin and dated between 1887+37/-11 - 1870±4 Ma. The ages of the younger volcanic succession indicate that ca. 150 Ma elapsed between the onset of initial continental rifting and the subsequent rifting event. A south-verging tectonic boundary or crustal suture (Bergeron suture) separates the northern Superior margin strata from allochthonous crustal elements of the Churchill plate to the north. Associated with and sitting in the hanging wall of the Bergeron suture are the crustal components of an obducted Paleoproterozoic ophiolite (Watts Group) dated as 1998±2 Ma. North of the Watts Group, a magmatic arc terrane forms the leading edge of the Churchill plate and includes: fore-arc clastic deposits (Spartan Group), a dominantly volcanic sequence (Parent Group), and a dominantly plutonic assemblage (Narsajuaq arc). The volcanic and plutonic units of the arc terrane can be grouped into two temporally and petrologically distinct, suites. The older suite includes calc-alkaline layered diorite-tonalite gneiss and tholeiitic to calc-alkaline basaltic andesite to rhyolite, and is dated between 1863±2 - 1845±2 Ma. It is interpreted as an island-arc assemblage built on Paleoproterozoic oceanic crust (Watts Group above) and a rifted sliver of Archean continental crust. The younger suite comprises crosscutting, gneissic to massive, monzodiorite to granite plutons. It is bracketed between 1842+5/-3 - 1820+4/-3 Ma and is interpreted as having been emplaced in an Andean-type continental arc setting. Archean and Paleoproterozoic units are intruded by massive, non-metamorphosed diabase dykes of Neoproterozoic age.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.003 | 0.005 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.004 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.181 | 0.070 |
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".