Journals / Turkish Journal of Earth Sciences / 2000 / Cilt: 9 - Sayı: 1

Devitrification of Volcanic Glasses in Konya Volcanic Units, Turkey

Pages
39–46
Publication Date
2000-01-01
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Neoformation of these minerals was probably controlled by the different chemical composition of the volcanic glasses in addition to the presence of feldspar.

📌 3 Key Takeaways

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Objective & Hypothesis:The study area is composed of volcanic, sedimentary and volcano-sedimentary units, which are exposed south and southwest of the city of Konya.
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Key Findings & Data:XRD analysis indicates that the volcanic units contain halloysite, kaolinite, smectite, illite and sepiolite type clay minerals and opal-CT, feldspar, quartz, minamiite and jarosite type non-clay minerals.
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Conclusion & Impact:Neoformation of these minerals was probably controlled by the different chemical composition of the volcanic glasses in addition to the presence of feldspar.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Clay Minerals · Feldspar · Devitrification

Abstract

The study area is composed of volcanic, sedimentary and volcano-sedimentary units, which are exposed south and southwest of the city of Konya. XRD analysis indicates that the volcanic units contain halloysite, kaolinite, smectite, illite and sepiolite type clay minerals and opal-CT, feldspar, quartz, minamiite and jarosite type non-clay minerals. SEM studies show that volcanic glasses, which are the main component of the volcanic units, appeared as curviplanar, vesicular-planar and in highly fractured shapes. Fractures and dissolution voids of the volcanic glasses are generally filled by hexagonal kaolinite, fibrous halloysite and smectite. Mineralogical and micromorphological observations indicate that clay minerals were neoformed by hydration of volcanic glasses. Neoformation of these minerals was probably controlled by the different chemical composition of the volcanic glasses in addition to the presence of feldspar.

Özet

The study area is composed of volcanic, sedimentary and volcano-sedimentary units, which are exposed south and southwest of the city of Konya. XRD analysis indicates that the volcanic units contain halloysite, kaolinite, smectite, illite and sepiolite type clay minerals and opal-CT, feldspar, quartz, minamiite and jarosite type non-clay minerals. SEM studies show that volcanic glasses, which are the main component of the volcanic units, appeared as curviplanar, vesicular-planar and in highly fractured shapes. Fractures and dissolution voids of the volcanic glasses are generally filled by hexagonal kaolinite, fibrous halloysite and smectite. Mineralogical and micromorphological observations indicate that clay minerals were neoformed by hydration of volcanic glasses. Neoformation of these minerals was probably controlled by the different chemical composition of the volcanic glasses in addition to the presence of feldspar.

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Cite This Article

-, Z. K. &. S. K. (2000). Devitrification of Volcanic Glasses in Konya Volcanic Units, Turkey. Turkish Journal of Earth Sciences, Cilt: 9 - Sayı: 1, 39–46. https://ajindex.com/articles/384905

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