Sağlık-Erenkaya (Konya batısı) yöresi volkanik kayaçlarının petrografik ve jeokimyasal özellikleri
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Date
2005
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info:eu-repo/semantics/openAccess
Abstract
Bu çalışmada Konya ilinin 40 km güneybatısında yüzeyleyen volkanik kayaçların petrografik ve jeokimyasal özellikleri araştırılmıştır.Yöredeki en yaşlı formasyon dolomit, dolomitik kireçtaşlarından oluşan Geç Triyas- Erken Jura yaşlı Kızılören formasyonudur. Bu birim kıtasal şelf türü karbonatlardan oluşan Jura-Kretase yaşlı Lorasdağı formasyonuna yanal ve dikey geçiş gösterir. Bu birimler, Geç Miyosen-Erken Pliyosen yaşlı Erenler-Alacadağ volkanitleri ile uyumsuz olarak örtülürler. Geç Pliyosen-Kuvaterner yaşlı Topraklı formasyonu diğer yaşlı birimleri uyumsuz olarak örter. Alüvyon inceleme alanındaki en genç birimdir. Volkanitler Kızılören ignimbiriti, tüf-aglomera, dasit, andezit, iki piroksenli andezit, trakiandezit ve Erenkaya ignimbiriti olarak ayrılmıştır. Volkanitler başlıca plajiyoklas, hornblend, ortopiroksen, klinopiroksen, kuvars, sanidin, tali opak ve apatit mineralleri içermektedirler. Çalışma sahasında yüzeyleyen Erenler-Alacadağ volkanitlerinin, petrografik ve jeokimya verileri andezitik-dasitik bileşimde, subalkalen karakter gösterir. Volkanitlerin kabuksal kökenli eski bir yitim zonunda oluşmuş volkanizma ürünü oldukları düşünülebilir.
Geological, petrographical and geochemical properties of the volcanic rocks, which are located 40 kms southwest of Konya, are investigated in this study. The oldest formation in the area is Kızılören formation, which consists of dolomites and dolomitic limestone of Late Triassic-Early Jurassic age. The formation shows transition laterally and vertically to Lorasdağı formation including continental shelf limestone of Jurassic-Cretaceous age. All these units were overlied unconformbly by late Miocene-Early Pliocene aged Erenler-Alacadagi volcanics. Topraklı formation, of Late Miocene-Quaternary age, overlies the older Units unconformably. The alluviums are the youngest units in the area. The volcanics were mapped as Kızılören ignimbirite, tuf-agglomerate, dacite, andesite, two-pyroxene andesite, trachyandesite and Erenkaya ignimbirite. The volcanic rocks contain mainly plagioclase, hornblende, orthopyroxene, clinopyroxene, quartz, sanidine, accessory opaque and apatite mineral . Petrographic and geochemical data of the Erenler-Alacadağ volcanics in the study area, indicate that they are andesite-dacite in composition with subalkaline character. They were suggested to be derived from a continental crust, and product of an old subduction-related volcanism.
Geological, petrographical and geochemical properties of the volcanic rocks, which are located 40 kms southwest of Konya, are investigated in this study. The oldest formation in the area is Kızılören formation, which consists of dolomites and dolomitic limestone of Late Triassic-Early Jurassic age. The formation shows transition laterally and vertically to Lorasdağı formation including continental shelf limestone of Jurassic-Cretaceous age. All these units were overlied unconformbly by late Miocene-Early Pliocene aged Erenler-Alacadagi volcanics. Topraklı formation, of Late Miocene-Quaternary age, overlies the older Units unconformably. The alluviums are the youngest units in the area. The volcanics were mapped as Kızılören ignimbirite, tuf-agglomerate, dacite, andesite, two-pyroxene andesite, trachyandesite and Erenkaya ignimbirite. The volcanic rocks contain mainly plagioclase, hornblende, orthopyroxene, clinopyroxene, quartz, sanidine, accessory opaque and apatite mineral . Petrographic and geochemical data of the Erenler-Alacadağ volcanics in the study area, indicate that they are andesite-dacite in composition with subalkaline character. They were suggested to be derived from a continental crust, and product of an old subduction-related volcanism.
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Keywords
Konya, Erenler-Alacadağ volkanitleri, subalkalin, kabuk kökenli, yitim zonu.
Journal or Series
Fırat Üniversitesi Fen ve Mühendislik Bilimleri Dergisi
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Volume
17
Issue
1
