Geology and Gold-Silver Mineralization in the Guadalupe de Los Reyes District, Sinaloa, Mexico
Bibliographic record
Abstract
Abstract The Guadalupe de Los Reyes project is situated 100 km north of the city of Mazatlan on the border between the states of Sinaloa and Durango, Mexico. The project covers approximately 88 km2 and hosts four major epithermal gold- and silver-bearing quartz veins, breccias, and stockwork zones with a combined strike length in excess of 14 km. Historically, three of these structures supported underground mining operations. The Guadalupe structure was mined as early as 1772, with the most active period being between 1872 and 1938. The Guadalupe de Los Reyes mine reported production of 15,500 kg (525,000 oz) of gold and 1.28 Mkg (41 Moz) of silver. Gold-silver mineralization within the district is associated with northwest- to west-northwest-striking, moderately southwest-dipping, dip-slip faults that cut basalt, andesite, and dacite of the Upper Cretaceous to early Tertiary Lower Volcanic sequence. These structures initially provided channelways for injection of dacite dikes and subvolcanic dacite porphyry stocks, possibly representing the roots of a dacite flow-dome complex. Continued fault movement prepared these structures for subsequent emplacement of low-sulfide, quartz-adularia, gold- and silver-bearing epithermal veins. Approximately 6.5 km of mineralized structure had preliminary drill testing. The geometry of the vein breccia zones in relationship to topography would potentially allow for exploitation using both open-pit and underground mining techniques. Tonnage and grade calculations based on geologic block models have outlined a resource of 24,400 kg (758,000 oz) of gold and 495,000 kg (15.9 Moz) of silver. The Guadalupe de Los Reyes district gold-silver epithermal system is closely associated with the last volcanic event in the Lower Volcanic sequence and has similarities to several other volcanic-hosted gold-silver deposits in the Sierra Madre Occidental such as the nearby Tayoltita deposit.
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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 | 0.001 |
| 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) | 0.001 | 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 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".