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Journals / Yerbilimleri / 2019 / Cilt: 40 - Sayı: 1

Petrographic and Geochemical Features of the Karlıca Volcanites (Hamur-Ağrı)

Karlıca Volkanitlerinin (Hamur-Ağrı) Petrografik ve Jeokimyasal Özellikleri

Mustafa AÇLAN
Nurseli DAVRAN
Pages
72–91
DOI
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AI Summary & Key Takeaways

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

These enrichments in Karlıca volcanites, and high Sr and Ba values suggest that crustal contamination is an effective process with fractional crystallization during the formation and evolution of the these rocks.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study was carried out to reveal the petrographic and geochemical features of the rocks around Demirkapı (Hamur-Ağrı).
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Key Findings & Data:The Nb/Yb and (Th/Nb)N ratios of the Karlıca volcanites range between 8.56- 15.52 and 12.59-15.43, respectively.
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Conclusion & Impact:These enrichments in Karlıca volcanites, and high Sr and Ba values suggest that crustal contamination is an effective process with fractional crystallization during the formation and evolution of the these rocks.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

This study was carried out to reveal the petrographic and geochemical features of the rocks around Demirkapı (Hamur-Ağrı). The volcanites in the study area have subalkaline, calc-alkaline, high-K calc-alkaline and shoshonitic features and consist of andesite, dacite, ignimbrite and tuffs. These volcanic rocks show enrichments in light rare earth elements (LREE) and large ion lithophile elements (LILE) (Cs, Rb, Ba, K). The Nb/Yb and (Th/Nb)N ratios of the Karlıca volcanites range between 8.56- 15.52 and 12.59-15.43, respectively. Average Sr and Ba values are 505.15ppm and 626.16ppm, respectively, and these values are higher than average Sr and Ba values of the continental crust. These enrichments in Karlıca volcanites, and high Sr and Ba values suggest that crustal contamination is an effective process with fractional crystallization during the formation and evolution of the these rocks.

Özet

Bu çalışma, Demirkapı (Hamur-Ağrı) dolaylarındaki volkanik kayaçların petrografik ve jeokimyasal özelliklerini ortaya çıkarmak amacıyla yapılmıştır. Çalışma alanındaki volkanitler subalkali, kalkalkali, yüksek K’lu seri ve şoşonitik özelliklere sahip olup andezit, dasit, ignimbrit ve tüflerden meydana gelirler. Bu volkanik kayaçlar hafif nadir toprak elementleri (HNTE) ve büyük iyonlu litofil elementler (BİLE) (Cs, Rb, Ba, K) açısından zenginleşme gösterirler. Karlıca volkanitlerinin Nb/Yb and (Th/Nb)N oranları sırasıyla 8.56-15.52 ve 12.59-15.43 arasında değişir. Ortalama Sr ve Ba değerleri 505.15ppm ve 626.16 ppm olup bu değerler ortalama kıtasal kabuk değerlerinin üzerindedir. Karlıca volkanitlerindeki bu zenginleşmeler ve yüksek Sr ve Ba değerlerinden bu kayaçların oluşumu ve evrimi sırasında fraksiyonel kristallenme ile birlikte kabuksal kirlenmenin de etkili bir süreç olduğu sonucu çıkarılabilir

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Cite This Article

AÇLAN, M., DAVRAN, N. (2019). Petrographic and Geochemical Features of the Karlıca Volcanites (Hamur-Ağrı). Yerbilimleri, Cilt: 40 - Sayı: 1, 72–91. https://ajindex.com/articles/332497

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