Late Cretaceous to Middle Eocene Magmatism and Metallogeny of a Portion of the Southeastern Anatolian Orogenic Belt, East-Central Turkey

40Ar/39Ar and U/Pb geochronology on biotite, zircon, K-feldspar, hornblende, and sericite from a suite of magmatic rocks and alteration zones defines three magmatic-related metallogenic events in the Southeastern Anatolian orogenic belt between 78 and 44 Ma. The oldest metallogenic event between similar to 78 to 74 Ma is related to arc-type calc-alkaline magmatic rocks (83-79 Ma) intruded into the Bitlis-Poturge and Malatya-Keban meta-morphics and overlying Komurhan-Ispendere ophiolites of Tauride platform. Uneconomic porphyry-type Cu-Au systems formed at Topalkem-Baskil (Elazig) and Ispendere-Sisman (Malatya). A second metallogenic event, between 74 and 69 Ma, is contemporaneous with postcollisional exhumation and extension-related magmatism. During this event, calc-alkaline followed by alkaline magmatism (76-73 Ma) was accompanied by formation of iron oxide copper-gold (IOCG) systems at similar to 74 to 73 Ma at Divrigi (Sivas). Alkaline magmatism at similar to 76 to 74 Ma is associated with IOCG systems at Hasancelebi (Malatya) and porphyry Cu-Mo and Pb-Zn veins at Keban (Elazig). The youngest metallogenic event between similar to 50 and 40 Ma is represented by porphyry Cu-Au deposits associated with calc-alkaline intrusive complexes at Copier and Kabatas and Fe skarns at Karamadazi, Horoz, Dedeyazi, and Bizmisen-Calti. 40Ar/39Ar and U/Pb geochronology on biotite, zircon, K-feldspar, hornblende, and sericite from a suite of magmatic rocks and alteration zones defines three magmatic-related metallogenic events in the Southeastern Anatolian orogenic belt between 78 and 44 Ma. The oldest metallogenic event between similar to 78 to 74 Ma is related to arc-type calc-alkaline magmatic rocks (83-79 Ma) intruded into the Bitlis-Poturge and Malatya-Keban meta-morphics and overlying Komurhan-Ispendere ophiolites of Tauride platform. Uneconomic porphyry-type Cu-Au systems formed at Topalkem-Baskil (Elazig) and Ispendere-Sisman (Malatya). A second metallogenic event, between 74 and 69 Ma, is contemporaneous with postcollisional exhumation and extension-related magmatism. During this event, calc-alkaline followed by alkaline magmatism (76-73 Ma) was accompanied by formation of iron oxide copper-gold (IOCG) systems at similar to 74 to 73 Ma at Divrigi (Sivas). Alkaline magmatism at similar to 76 to 74 Ma is associated with IOCG systems at Hasancelebi (Malatya) and porphyry Cu-Mo and Pb-Zn veins at Keban (Elazig). The youngest metallogenic event between similar to 50 and 40 Ma is represented by porphyry Cu-Au deposits associated with calc-alkaline intrusive complexes at Copier and Kabatas and Fe skarns at Karamadazi, Horoz, Dedeyazi, and Bizmisen-Calti. 40Ar/39Ar and U/Pb geochronology on biotite, zircon, K-feldspar, hornblende, and sericite from a suite of magmatic rocks and alteration zones defines three magmatic-related metallogenic events in the Southeastern Anatolian orogenic belt between 78 and 44 Ma. The oldest metallogenic event between similar to 78 to 74 Ma is related to arc-type calc-alkaline magmatic rocks (83-79 Ma) intruded into the Bitlis-Poturge and Malatya-Keban meta-morphics and overlying Komurhan-Ispendere ophiolites of Tauride platform. Uneconomic porphyry-type Cu-Au systems formed at Topalkem-Baskil (Elazig) and Ispendere-Sisman (Malatya). A second metallogenic event, between 74 and 69 Ma, is contemporaneous with postcollisional exhumation and extension-related magmatism. During this event, calc-alkaline followed by alkaline magmatism (76-73 Ma) was accompanied by formation of iron oxide copper-gold (IOCG) systems at similar to 74 to 73 Ma at Divrigi (Sivas). Alkaline magmatism at similar to 76 to 74 Ma is associated with IOCG systems at Hasancelebi (Malatya) and porphyry Cu-Mo and Pb-Zn veins at Keban (Elazig). The youngest metallogenic event between similar to 50 and 40 Ma is represented by porphyry Cu-Au deposits associated with calc-alkaline intrusive complexes at Copier and Kabatas and Fe skarns at Karamadazi, Horoz, Dedeyazi, and Bizmisen-Calti.