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Record W4230202142 · doi:10.1080/00288306.2019.1662817

Chatham Schist

2019· article· en· W4230202142 on OpenAlex

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.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueNew Zealand Journal of Geology and Geophysics · 2019
Typearticle
Languageen
FieldEarth and Planetary Sciences
TopicGeological and Geochemical Analysis
Canadian institutionsUniversity of British Columbia
FundersMinistry of Business, Innovation and Employment
KeywordsSchistGeologyGreenschistMetamorphismTerraneGeochemistryMetamorphic faciesMetamorphic rockPaleontologyFaciesTectonics

Abstract

fetched live from OpenAlex

ABSTRACT New structural, petrographic, whole rock chemical and mineral chemical data from the Chatham Schist, the easternmost part of the Haast Schist, are presented. In combination with existing geochronological data, these bring knowledge of the basic geological framework of the Chatham Schist to the same standard as the rest of the Haast Schist. Chatham Schist is dominated by greyschist whose protoliths are correlated with the Permian‐Triassic Rakaia Terrane of the Torlesse Composite Terrane. Graded bedding can be recognised in a few places in the northern Chatham Schist, but no fossils have been found. Metamorphic grade on Chatham Island is pumpellyite‐actinolite facies and textural grade varies from TZ2A‐3. Transitional greenschist‐amphibolite facies, garnet‐biotite zone Chatham Schist has been sampled in a xenolith from a Pliocene volcano and in a Southeast Chatham Terrace dredge. The age of Chatham Schist prograde metamorphism is Middle to Late Jurassic. At least two phases of penetrative deformation, and a third, brittle faulting phase, are recognised. Chatham Schist was rapidly exhumed in the late Early Cretaceous, possibly as a result of collision of the Hikurangi Plateau against the Gondwana supercontinent. Detrital garnets and spinels now found on Chatham Islands beaches were not sourced from Chatham Schist.

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 categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.098
Threshold uncertainty score0.996

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 studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0050.000

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 head0.005
GPT teacher head0.179
Teacher spread0.174 · 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