$^{207}Pb- ^{206}Pb$, $^{40}Ar- ^{39}Ar$ and apatite fission-track geothermochronology revealing the emplacement, cooling and exhumation history of the karaçayır syenite (N Sivas), East-Central Anatolia, Turkey

$^{207}Pb- ^{206}Pb$, $^{40}Ar- ^{39}Ar$ and apatite fission-track geothermochronology revealing the emplacement, cooling and exhumation history of the karaçayır syenite (N Sivas), East-Central Anatolia, Turkey

Sivas (İç-Doğu Anadolu) yöresinde Paleozoyik yaşlı kabuksal metasedimanter kayaçları sıcak dokanakla kesen ve Geç Paleosen– Eosen yaşlı Tokuş formasyonuyla uyumsuz olarak örtülen Karaçayır siyeniti tek zirkon $^{207}Pb- ^{206}Pb$ buharlaşma, biyotit $^{40}Ar- ^{39}Ar$ ve apatit fizyon izi jeotermokronolojisi yöntemleriyle incelenmiştir. Tek zirkon $^{207}Pb- ^{206}Pb$ buharlaşma yaş tayini çalışmaları sonucunda Karaçayır siyenitinin intrüzyon yaşı 99.0±11.0 My (Senomaniyen–Turoniyen) olarak belirlenmiştir. Biyotit $^{40}Ar- ^{39}Ar$ yaş tayini çalışmaları ~65 My civarında bir soğuma yaşı vermiştir. Apatit fizyon izi yaş tayini ve iz uzunluk ölçüm çalışmalarına dayalı sıcaklıkzaman (T-t) modelleme verileri, Karaçayır siyenitinin 58 ile 61 My aralığında (Orta Paleosen) yıllık 1 mm’den daha hızlı olan tektonik yükselme ile yüzeylendiğini ortaya koymuştur. Orta Paleosen yaşlı bu tektonik yükselmenin, Avrasya levhasının (AL) altına ve kuzeye doğru dalmakta olan İzmir-Ankara-Erzincan (İAE) okyanusunun kapanması sonucu, İAE kenet kuşağı boyunca meydana gelen ve AL ile Torid-Anatolid platformunun (TAP) kenetlenmesini sağlayan kıta-kıta çarpışması ile meydana gelen sıkışma rejiminden kaynaklandığı ileri sürülmektedir. Bu sıkışma rejimi, aynı zamanda, Orta Anadolu önülke havzalarının gelişimini de sağlamıştır.

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Turkish Journal of Earth Sciences-Cover
  • ISSN: 1300-0985
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
Sayıdaki Diğer Makaleler

Geochemical Characteristics of Mafic and Intermediate Volcanic Rocks from the Hasandağ and Erciyes Volcanoes (Central Anatolia, Turkey)

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DURMUŞ BOZTUĞ, ÖZLEM GÜNEY, MATT HEIZLER

$^{207}Pb- ^{206}Pb$, $^{40}Ar- ^{39}Ar$ and apatite fission-track geothermochronology revealing the emplacement, cooling and exhumation history of the karaçayır syenite (N Sivas), East-Central Anatolia, Turkey

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Alteration Mineralogy and Geochemistry of the Hydrothermally Altered Rocks of the Kutlular (Sürmene) Massive Sulfide Deposit, NE Turkey

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$^{207}Pb- ^{206}Pb$, $^{40}Ar- ^{39}Ar$ and fission-track geothermochronology quantifying cooling and exhumation history of the Kaman- Kırşehir region intrusions, Central Anatolia, Turkey

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Whole Rock and Mineral Chemistry of Ultramafic-mafic Cumulates from the Orhaneli (Bursa) Ophiolite, NW Anatolia

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Lead and Sulfur Isotope Studies of the Koru (Çanakkale, Turkey) Lead-Zinc Deposits

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