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Record W2750684897 · doi:10.7901/2169-3358-2017.1.515

THE GREAT PATAGONIAN OIL SPILL (METULA), 41 YEARS LATER

2017· article· en· W2750684897 on OpenAlex
Erich R. Gundlach

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

VenueInternational Oil Spill Conference Proceedings · 2017
Typearticle
Languageen
FieldEnvironmental Science
TopicOil Spill Detection and Mitigation
Canadian institutionsnot available
Fundersnot available
KeywordsShoreGeologySalt marshAsphaltOceanographyMarshOil spillHydrology (agriculture)Environmental scienceArchaeologyGeographyGeotechnical engineeringPetroleum engineeringWetlandEcology

Abstract

fetched live from OpenAlex

ABSTRACT: 2017-300 On 9 August 1974, the supertanker VLCC Metula spilled over 50,000 tons of Saudi Arabian crude oil and 2000 tons of bunker oil into the eastern portion of the Strait of Magellan in southern Chile. Oil spread over 200 km of glacially derived shorelines primarily composed of mixed sand and gravel to boulder-sized material. No cleanup was performed. Initial and follow-up investigators from Chile, U.S., U.K. and Canada reported on oiled shoreline conditions and spill persistence through 2005. This report extends the analysis to February 2015 for the primary areas noted as having remaining oil, i.e. within Puerto Espora behind Espora spit and the sheltered East Espora Marsh. Both are located along the First Narrows on the Tierra del Fuego side of the Strait. Comparisons are made to previous site visits in 1975–76, 1981 and 1995. Conditions at Puerto Espora historically showed a wide band of thick asphalted gravel pavement in a slow process of breakup. This area in 2015 has been further degraded by physical processes but mineralized asphalt remnants are still evident over a discontinuous length of 180 m (maximums: width = 8 m, thickness = 10 cm). In East Espora Marsh, oil initially entered during a very high tide such that oil settled on to channel banks and upper areas dominated by salt-tolerant plants (Salicornia, Puccinellia and Sueda). In 2015, oil remains very much in evidence as weathered asphalt in thin deposits, as a high viscosity black oil with underlying brown mousse common in thicker (>4 cm) deposits, and as oil buried up to 10 cm below a layer of fine silt/clay. Vegetation has recovered to an estimated 75% in interior marsh areas and to ~35% in the outer marsh located at the entry to the marsh. The Metula site remains of great scientific interest in terms of oil spill persistence in a cool dry environment that may be compared to other high latitude habitats such as found in the newly opening Arctic Ocean area.

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)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesInsufficient payload (model declined to judge)
Consensus categoriesInsufficient payload (model declined to judge)
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Other design · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.829
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0010.000
Scholarly communication0.0010.001
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0020.002

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 head0.018
GPT teacher head0.250
Teacher spread0.232 · 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