Meso and Micro-scale Analysis of Foliated Rocks of the Southern Coast Belt: A Transect from Whistler to Lillooet, British Columbia
Bibliographic record
Abstract
MESO AND MICRO-SCALE ANALYSIS OF FOLIATED ROCKS OF THE SOUTHERN COAST BELT:A TRANSECT FROM WHISTLER TO LILLOOET, BRITISH COLUMBIA Erich Victor Zorn, M.S.University of Pittsburgh, 2005Between Whistler and Lillooet, British Columbia within the Coast Belt rocks of Gambier Group, Cadwallader Group, Chism Creek Schist, Cayoosh Assemblage, Bridge River Complex/Schist, and the Brew Group, penetrative deformation is commonly recorded. Along this 110 km transect foliation generally dips 30ºNE to vertical and strikes northwest. Down-dip lineation is common in these rocks. Although they are commonly re-crystallized, locally developed microstructures preserve shear-sense indicators in sections cut parallel to dip and perpendicular to foliation. Differences among ductile structures indicate at least five episodes of deformation. 1) Foliation of Oligocene-Miocene (~25-14 Ma) age which strikes northeast and dips steeply is present in Early Cretaceous plutonic rocks east of Whistler. 2) Sub-horizontal penetrative foliation and shear bands in the Brew Group record NW-SE extension that is interpreted to record structural exhumation of the Brew in the footwall of the Cayoosh Creek Fault. 3) Steeply dipping mylonite and L-tectonite with distinct sub-horizontal mineral lineation is present along the dextral, Eocene Marshall Creek Fault. The penetrative deformation overprints microstructures that record left and right lateral shear sense indicators. 4) Pre-85 Ma: Mineral lineations and meso-scale asymmetric folds that give a sense of oblique left-slip and pure shear are recorded in the Chism Creek Schist and Cayoosh Assemblage close to the Bralorne and Downton Creek fault systems. 5) Post-113 Ma: Near Whistler, outcrops of very fine grained volcanic rocks and meta-sediments of the Gambier Group have mylonitic foliation and show strong mineral lineation parallel to the dip direction. Meso-scale kink folds and asymmetric tails in thin section are interpreted to record extension whereas symmetric tails record flattening during pure shear. Late Jurassic intrusive rocks nearby to the west and east of this belt of meta-volcanics are ductily deformed.
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.
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 | 0.001 |
| 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) | 0.004 | 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".