The Upper Jurassic-Upper Cretaceous magmatic sequence of the Cordillera Central, Dominican Republic
Bibliographic record
Abstract
the Cordillera Central domain, located southern of the Hispaniola Fault Zone, an Upper Jurassic-Upper Cretaceous magmatic sequence is recognized, which includes eight lithostratigraphic-geochemical units formed by a great variety of plutonic, volcanic, volcaniclastic and sedimentary rocks. The three lowermost units have an ophiolitic character, since it is considered oceanic lithosphere with its typical pseudostratigraphy though incomplete: upper mantle rocks are represented by the Loma Caribe serpentinized peridotite; gabbros, dolerites and volcanic MORB-rocks by the oceanic volcano-plutonic assemblage of the Loma La Monja; and the pelagic sediments by the El Aguacate Chert, lacking the crustal terms of layered cumulate gabbros and part of the dyke-complex. Over this Late Jurassic proto- Caribbean oceanic sustrate, an event of Caribbean oceanic plateau formation during the Lower Cretaceous (Albian) is superposed and represented by the picrites and high-Mg basalts of the Duarte Complex. The overlying volcanic and subvolcanic rocks of the Tireo Group are related to subduction processes under the oceanic plateau in the Late Cretaceous. Subduction-zone formation in the Albian gave rise a typical island arc tholeiitic magmas, that compositionally shift to an association of adakites, high-Mg andesites and Nb-enriched basalts in the Turonian-Santonian interval. The tholeiitic, transitional and alkaline basalts of the Peña Blanca, Pelona-Pico Duarte and Magua Fms, represent new plume-related intraplate magmatism in the Late Campanian-Maastrichtian. The Caribbean island arc inactivity is recorded in this area with the subsequent carbonate sedimentation of the Bois de Lawrence Fm during the Maastrichtian.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.009 | 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".