Geochemistry, fluid inclusion and stable isotope constraints (C and O) of the Sivrikaya Fe-skarn mineralization (Rize, NE Turkey)

Anatomy of Garnet from the Nanminghe Skarn Iron Deposit, China: Implications for Ore Genesis

“…When boiling ceased, the interaction between fluid and wall rock tends to reduce the fluid back to an ƒO 2 value that is locally buffered by Fe 2+ bearing silicates and favors grossular precipitation [40]. The breccia commonly occurring in the Nanminghe iron deposit and the numerous cracks under the microscope may be the indication of hydrofracturing after boiling [41]. Tian et al (2019) [12] discussed the formation of oscillatory zoning in garnets from the Hongshan Cu-Mo skarn deposit and proposed that the Al-rich zones were likely formed under a relatively reduced and near-neutral pH condition, whereas the Fe-rich zones probably formed in a more oxidized and mildly acidic condition.…”

Dağbaşi Skarn Yataklarinin Jeoloji̇k, Mi̇neraloji̇k Ve Jeoki̇myasal Özelli̇kleri̇ (Arakli-Trabzon, Kd Türki̇ye)

“…The region contain a large number of skarn-type ore deposits, due to the widespread outcrop of carbonate rocks (Berdiga formation) and granitic intrusions which cut these carbonate rocks. Çambaşı, Kotana, Kirazören, Ögene, Özdil, Dağbaşı, Kartiba, Sivrikaya, Demirköy, Eğrikar, Camiboğazı, and Arnastal are some of these well-known skarn occurrences (Demir et al, 2017) (Figure 1). Some studies performed on the skarn-type deposits of the region (Aslan, 1991;Hasançebi, 1993;Saraç, 2003;Çiftçi and Vıcıl, 2003;Çiftçi, 2011;Sipahi, 2011;Kurt, 2014;Sipahi et al, 2017;Demir et al, 2017) have demonstrated that these deposits show many differences in terms of ore types, alteration products, and formation conditions.…”

“…Çambaşı, Kotana, Kirazören, Ögene, Özdil, Dağbaşı, Kartiba, Sivrikaya, Demirköy, Eğrikar, Camiboğazı, and Arnastal are some of these well-known skarn occurrences (Demir et al, 2017) (Figure 1). Some studies performed on the skarn-type deposits of the region (Aslan, 1991;Hasançebi, 1993;Saraç, 2003;Çiftçi and Vıcıl, 2003;Çiftçi, 2011;Sipahi, 2011;Kurt, 2014;Sipahi et al, 2017;Demir et al, 2017) have demonstrated that these deposits show many differences in terms of ore types, alteration products, and formation conditions. According to these studies, while exoskarn-type mineralization has been reported from Özdil, Kartiba, Sivrikaya, Çambaşı, Kotana, Arnastal, and Camiboğazı deposits, both endoskarn-and exoskarn-type deposits have been Figure 1-Geological map of the Eastern Black Sea Region and distribution of some skarn type deposits (Modifi ed after Güven et al, 1998).…”

“…reported from Kirazören, Ögene, and Eğrikar deposits. Ore in the Özdil, Kartiba, Camiboğazı, and Sivrikaya deposits consists of oxide minerals (magnetite and hematite) while sulfur minerals accompany oxide phases in the Arnastal, Kotana, Kirazören, Eğrikar, and Dağbaşı deposits (Demir et al, 2017). In terms of host rocks, the age of carbonates ranges from Early Jurassic to Late Cretaceous and the age of intrusions from Jurassic to Eocene (Sipahi et al, 2017;Demir et al, 2017).…”

“…Ore in the Özdil, Kartiba, Camiboğazı, and Sivrikaya deposits consists of oxide minerals (magnetite and hematite) while sulfur minerals accompany oxide phases in the Arnastal, Kotana, Kirazören, Eğrikar, and Dağbaşı deposits (Demir et al, 2017). In terms of host rocks, the age of carbonates ranges from Early Jurassic to Late Cretaceous and the age of intrusions from Jurassic to Eocene (Sipahi et al, 2017;Demir et al, 2017). In spite of these studies, it is understood that skarn-type deposits are less well investigated in comparison with the other types of deposits in the region, so the geological, mineralogical, and geochemical differences between these deposits have not been suffi ciently clarifi ed.…”