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Record W328416062

THE POTENTIAL EXISTENCE OF ANALOGUE PLEISTOCENE METEORITE PLACERS IN FORMERLY GLACIATED REGIONS OF RUSSIA WHEN COMPARED TO ANTARCTIC METEORITE PLACERS.

2007· article· en· W328416062 on OpenAlex
A. A. Mardon, Mark Zalcik

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueMeteoritics and Planetary Science Supplement · 2007
Typearticle
Languageen
FieldPhysics and Astronomy
TopicAstro and Planetary Science
Canadian institutionsnot available
Fundersnot available
KeywordsMeteoriteGeologyPleistoceneGlacial periodAstrobiologyIce sheetMars Exploration ProgramEarth scienceCosmogenic nuclidePaleontologyGeomorphologyCosmic ray
DOInot available

Abstract

fetched live from OpenAlex

Noctilucent Cloud Canadian - American Network (bluegrama@shaw.ca), The recovery of over 30,000 meteorites from Antarctic placer zones might have analogue areas for paleo-ice concentration from the last glaciation in areas of Northern Russia. In 2005 three meteorites were recovered from Manitoba, Canada; which have been proposed to be concentrated in the same process as the meteorites that have been recovered in Antarctica. If just one non-Antarctic Pleistocene meteorite place zone was recovered in Russia or Canada it might yield thousands of separate meteorite samples. Billions of dollars are spent on retrieving non-terrestrial geological samples and meteorites for the time being are still a cost effective way of collecting geological samples from the inner solar system. With minimal cost regions and sites could be selected for potential searching for meteorites even if only with public media campaigns to make the populace aware that they might find a piece of either the Moon or Mars in their locale. In depth topographic analyses in analogue with Antarctic meteorite placer zones might indicate potential areas in the Urals zone, Northern Europe and in North America, together with flow model of Pleistocene paleo-ice sheets could indicate areas where important slow down of ice happened. These areas should be important ancient meteorite trap relicts. The northern hemisphere paleo-ice sheets could have represented a great collectors for extraterrestrial material as well as the Antarctica ice sheet represents the most productive region for the discovery of meteorites on Earth nowadays. Beside being well preserved from the terrestrial weathering processes, meteorites are concentrated in specific regions by ice flow dynamics, according to the “ice-flow model”. In this model, the extra-terrestrial material is embedded within the ice mass and transported downstream from snow accumulation zones; meteorite traps typically are formed in front of submerged or emerged bedrock obstacles, where the meteorite-bearing ice slows down forming areas of stagnant or slow-moving ice. There, a combination of ice deformation and uplift by the buttressing effect and wind ablation is capable of exhuming and concentrating meteorites trapped in the ice. As a consequence, high ablation rates and low surface velocity is the common characteristic of nearly all meteorite traps. The barrier effect could happen where two ice lobes meet together moving in a opposite way, although the lowest surface velocity are recorded in front of a bedrock barrier (submerged or emerged). During the last glaciation, in the northern hemisphere ice caps similar ice flow condition could have developed. The Urals could have represented a great obstacle to the ice moving southward (or south-westward) in a similar way to the Transantarctic Mountain in Antarctica.

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.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.003
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.085
Threshold uncertainty score0.996

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0030.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.010
GPT teacher head0.245
Teacher spread0.235 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it