Corona networks as three-dimensional records of transport scale and pathways during metamorphism
Bibliographic record
Abstract
Research Article| February 01, 2012 Corona networks as three-dimensional records of transport scale and pathways during metamorphism Eric T. Goergen; Eric T. Goergen * Department of Earth Sciences, University of Minnesota, Minneapolis, Minnesota 55455, USA *Current address: Department of Geological Sciences, Brown University, Providence, Rhode Island 02912, USA; E-mail: eric_goergen@brown.edu. Search for other works by this author on: GSW Google Scholar Donna L. Whitney Donna L. Whitney Department of Earth Sciences, University of Minnesota, Minneapolis, Minnesota 55455, USA Search for other works by this author on: GSW Google Scholar Geology (2012) 40 (2): 183–186. https://doi.org/10.1130/G32452.1 Article history received: 12 May 2011 rev-recd: 04 Oct 2011 accepted: 12 Oct 2011 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Eric T. Goergen, Donna L. Whitney; Corona networks as three-dimensional records of transport scale and pathways during metamorphism. Geology 2012;; 40 (2): 183–186. doi: https://doi.org/10.1130/G32452.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Coronal textures in metamorphic rocks are physical evidence that diffusion was the rate-limiting process in the local reactions that produced these layered structures. Mass balance, however, requires that chemical communication must also take place at length scales significantly greater than those of the corona. Evidence for the anatomy and scale of pathways along which chemical communication occurred is rarely recorded in metamorphic rocks, but orthoamphibole-cordierite gneiss from the Thor-Odin dome, British Columbia (Canada), preserves multi-layered coronal reaction textures around garnet and Al2SiO5 connected by anastomosing networks of cordierite and biotite that represent relict pathways along which mass transport occurred during reaction texture development. Calculations of component fluxes between reaction textures and surrounding mineral assemblages indicate that relatively long-distance (centimeter-scale) diffusional exchange was required for development of ∼150–500-μm-thick corona. Results of electron backscattered diffraction analysis and high-resolution X-ray computed tomography give new information about the scale and pathways of chemical communication during high-grade metamorphism, and show that length-scales of material transport were two orders of magnitude greater than those of the reaction textures. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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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) | 0.014 | 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".