Sürdürülebilir Kalkınma Amaçları

Yazarlar

  • MakaleYayıncıda açık erişim2009Scopus SJRQ1
    207Pb-206Pb, 40Ar-39Ar and Fission-Track Geothermochronology Quantifying Cooling and Exhumation History of the Kaman-Kirsehir Region Intrusions, Central Anatolia, Turkey

    Boztug, Durmus; Güney, Ozlem; Heizler, Matt; Jonckheere, Raymond C.; Tichomirowa, Marion; Otlu, Nazmi

    The Kaman-Kirsehir region intrusions were generated in a post-collisional extensional setting following Cenomanian-Turonian docking of an oceanic island arc, comprising the supra-subduction zone (SSZ) Central Anatolian ophiolite (CAO), onto the Tauride-Anatolide Platform (TAP). These granitoids have been named, from N to S, the Camsari quartz syenite, Hamit quartz syenite, Bayindir nepheline-cancrinite syenite, Durmuslu nepheline-nosean-melanite syenite porphyry and Baranadag quartz monzonite. They intrude the crustal metasediments of the Central Anatolian Crystalline Complex (CACC) and CAO and are unconformably overlain by Upper Paleocene to Lower-Middle Eocene sediments. The single-zircon Pb-207-Pb-206 evaporation age of the Camsari unit is 95.7 +/- 5.1 Ma; those of the Hamit and Baranadag units are indistinguishable with a weighted mean of 74.3 +/- 4.5 Ma. The amphibole 40Ar-39Ar ages of the Hamit and Baranadag units are almost identical with a weighted mean of 72.7 +/- 0.1 Ma. The apatite fission-track age vs elevation plot for the Camsari, Hamit, Durmuslu and Baranadag samples reveals rapid exhumation (>1 km/Ma) between similar to 57 and similar to 61 Ma, consistent with the results of track-length modelling. This Early-Middle Paleocene rapid exhumation is thought to result from uplift triggered by continent (TAP) - continent (Eurasian plate; EP) collision following the closure of Izmir-Ankara-Erzincan (IAE) ocean that also initiated the formation of peripheral foreland basins in central Anatolia. The Kaman-Kirsehir region intrusions were generated in a post-collisional extensional setting following Cenomanian-Turonian docking of an oceanic island arc, comprising the supra-subduction zone (SSZ) Central Anatolian ophiolite (CAO), onto the Tauride-Anatolide Platform (TAP). These granitoids have been named, from N to S, the Camsari quartz syenite, Hamit quartz syenite, Bayindir nepheline-cancrinite syenite, Durmuslu nepheline-nosean-melanite syenite porphyry and Baranadag quartz monzonite. They intrude the crustal metasediments of the Central Anatolian Crystalline Complex (CACC) and CAO and are unconformably overlain by Upper Paleocene to Lower-Middle Eocene sediments. The single-zircon Pb-207-Pb-206 evaporation age of the Camsari unit is 95.7 +/- 5.1 Ma; those of the Hamit and Baranadag units are indistinguishable with a weighted mean of 74.3 +/- 4.5 Ma. The amphibole 40Ar-39Ar ages of the Hamit and Baranadag units are almost identical with a weighted mean of 72.7 +/- 0.1 Ma. The apatite fission-track age vs elevation plot for the Camsari, Hamit, Durmuslu and Baranadag samples reveals rapid exhumation (>1 km/Ma) between similar to 57 and similar to 61 Ma, consistent with the results of track-length modelling. This Early-Middle Paleocene rapid exhumation is thought to result from uplift triggered by continent (TAP) - continent (Eurasian plate; EP) collision following the closure of Izmir-Ankara-Erzincan (IAE) ocean that also initiated the formation of peripheral foreland basins in central Anatolia.

    AtıfWoS23
    Web of Scienceİncele
  • MakaleYayıncıda açık erişim2009Scopus SJRQ1
    207Pb-206Pb, 40Ar-39Ar and Apatite Fission-Track Geothermochronology Revealing the Emplacement, Cooling and Exhumation History of the Karacayir Syenite (N Sivas), East-Central Anatolia, Turkey

    Boztug, Durmus; Türksever, Esra; Heizler, Matt; Jonckheere, Raymond C.; Tichomirowa, Marion

    The Karacayir syenite, intruding the Palaeozoic crustal metamorphics and unconformably overlain by Upper Paleocene to Eocene Tokus formation in the north of Sivas (east-central Anatolia), has been studied with respect to Pb-207-Pb-206 single zircon evaporation, biotite 40Ar-39Ar, and apatite fission-track geothermochronology. Pb-207-Pb-206 single zircon evaporation dating yields an age of 99.0 +/- 11.0 Ma (Cenomanian-Turonian) which is considered to be the intrusion age. Biotite 40Ar-39Ar age determination gives a cooling age of ca. 65 Ma. Apatite fission-track dating, combined with T-t modeling based on track-length distribution data, determines a fast tectonic exhumation with an uplift rate of > 1 mm/a which occurred 58-61 Ma ago. This Middle Paleocene fast tectonic uplift is considered to have resulted from a compressional regime induced by the collision between the Tauride-Anatolide platform (TAP) and the Eurasian plate (EP) along the Izmir-Ankara-Erzincan (IAE) suture zone following the closure of the north-dipping subducted IAE ocean which belongs to northern Neo-Tethyan realm. This compressional regime has also formed the peripheral foreland basins in central Anatolia.

    AtıfWoS14
    Web of Scienceİncele