Interpretation of the Magma Chamber Processes with the help of Textural Stratigraphy of the Plagioclases (Konya-Central Anatolia)
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Bibliographic record
Abstract
The variations in the chemical composition and micro-texture of a mineral from the core to the rim allow the sequencing of the formation of the magma chamber processes and the interpretation of which texture might have been formed by which process. In this contribution, the textural and chemical zoning of the plagioclases, which are a significant recorder of magma chamber processes, from some enclavecontaining andesites (calc-alkaline) and basalts (calc-alkaline) from the Karapnar-Karacada Volcanic Units, were examined and their textural mineral stratigraphies were investigated to enlight the magma chamber processes. Plagioclases from the andesitic host-rock and their enclaves generally exhibit different composition from core to rim. The composition in the enclave ranges from oligoclase to labradorite (core:An25-72), however, in the host rock it ranges from andesine to labradorite (core:An46-64). It is noteworthy that the plagioclases in the host-rock are mostly rounded, and reverse and oscillatory zoned with Anorthite, Fe, Mg, Sr, and Ba. However in the enclaves they display generally fine sieve and dusty sieve textures. The cores of the plagioclase micro-phenocrysts in calc-alkaline basalts are andesine-labrador (An32-66) in composition. Remarkably, plagioclases in basalts show reverse and oscillatory zoning with An, Fe, Mg, Sr, and Ba, and as well as exhibit coarse-grained sieve texture with glass and microlitic inclusions, and spongy cellular textures. Combined with their An, Fe, Mg contents it is suggested that some of the plagioclases from the basalts may be xenocrysts rather than phenocrysts. Considering the textural and chemical properties of the plagioclases, in the formation of reverse and oscillatory zoning in the basaltic rocks, the decompression processes in addition to the magma mixing processes (magma mixing/self-mixing) also have an impact on the genesis of the basalts. However, in the formation of andesitic rocks, the magma replenishment processes have a key role rather than decompression or temperature-pressure change.
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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 | 0.002 |
| Science and technology studies | 0.000 | 0.003 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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