Cretaceous strontium isotope stratigraphy using marine barite
Bibliographic record
Abstract
Research Article| January 01, 2003 Cretaceous strontium isotope stratigraphy using marine barite Sarah Mearon; Sarah Mearon 1Department of Geological and Earth Sciences, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Adina Paytan; Adina Paytan 1Department of Geological and Earth Sciences, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Timothy J. Bralower Timothy J. Bralower 2Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Sarah Mearon 1Department of Geological and Earth Sciences, Stanford University, Stanford, California 94305, USA Adina Paytan 1Department of Geological and Earth Sciences, Stanford University, Stanford, California 94305, USA Timothy J. Bralower 2Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599, USA Publisher: Geological Society of America Received: 10 Apr 2002 Revision Received: 06 Sep 2002 Accepted: 13 Sep 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (1): 15–18. https://doi.org/10.1130/0091-7613(2003)031<0015:CSISUM>2.0.CO;2 Article history Received: 10 Apr 2002 Revision Received: 06 Sep 2002 Accepted: 13 Sep 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Sarah Mearon, Adina Paytan, Timothy J. Bralower; Cretaceous strontium isotope stratigraphy using marine barite. Geology 2003;; 31 (1): 15–18. doi: https://doi.org/10.1130/0091-7613(2003)031<0015:CSISUM>2.0.CO;2 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 The strontium isotope ratios (87Sr/86Sr) of marine barite microcrystals separated from Cretaceous sedimentary deposits from Ocean Drilling Program and Deep Sea Drilling Project sites from the Pacific and Indian Oceans have been compared to the composite Sr isotope curve of McArthur et al. The barite in these cores accurately recorded the seawater 87Sr/86Sr ratio, thereby reaffirming the composite Cretaceous strontium curve. Moreover, marine barite is a more reliable recorder of 87Sr/86Sr than is carbonate in sedimentary deposits with high clay content, thereby providing an opportunity for Sr isotope stratigraphy and dating in carbonate-poor or diagenetically altered sections. We have used the barite-derived Sr isotope record to refine the biostratigraphic age models of the sites investigated. 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) | 0.015 | 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".