Bibliographic record
Abstract
The North American Lake Superior region contains a world-class copper province nearly 300,000 km² in area. A dozen major copper deposits and hundreds of smaller mineral accumulations are located in Michigan, Minnesota, and Ontario (Morey and Sims 1996), many of which include As, nickel (Ni), platinum (Pt), palladium (Pd), Co, Mo, and Fe, as well as Cu (Nicholson et al. 1992). Historically, the province has hosted a variety of life forms; fossil biota have been traced as far back as 2.6-2.75 Ga. Palynological and microbial research (Robbins 1985, Robbins et al. 1994) prompts speculation about possible correlations between copper and the biota that evolved there. Because the region has been subjected to continental collisions, volcanism, glaciation, rifting, weathering, sea level rise and fall, waxing and waning of lakes, soil formation, and now to human settlement and development including mining, the fossil record is discontinuous. This review of the geologic formations in the Lake Superior region from the Precambrian to the present, and their copper and biotic occurrences and associations, attempts to illuminate some of those geologic/ biologic correlations, and includes mention of modern environmental concerns. Copper is one of nearly 75 chemical elements contributing to metabolic or structural functions of organisms (Dexter-Dyer et al. 1984). Bioassimilation varies and depends not only on availability from the environment, but also on the species, gender, and age of organism with specific concentrations also depending on diet, health, tissue assayed, and various synergisms with other trace elements such as Fe and Zn. Indeed, copper is an essential element and co-factor contributing to copper-associated polypeptides that provide catalytic and electron transfer functions in almost every known group of organisms alive today, from bacteria to humans. Copper proteins contribute to skin pigmentation, nerve coverings, and in mechanisms of development, maintenance, and repair of connective tissues important for well-functioning cardiovascular systems (Eisler 2000). Presently, over two dozen essential copper proteins, some with porphyrin-copper functional groups (similar to the porphyrin-iron association in hemoglobin), have been identified, each with its specific developmental or physiological function (Cowan 1998).
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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 | 0.000 | 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) | 0.000 | 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".