Bull. Min. Res. Exp. (2016) 153:139-158 153 BULLETIN OF THE MINERAL RESEARCH AND EXPLORATION Foreign Edition 2016 153 ISSN : 0026 - 4563 Bulletin of the Mineral AND EXPLORATION RESEARCH MINERAL BULLETIN OF THE BULLETIN OF CONTENTS Upper Cretaceous-Tertiary Geology/Stratigraphy of Pertek and Its Vicinity (Tunceli, Turkey) ............................................................................................................................Erdal İ. HERECE, Şükrü ACAR/ Research Article 1 Tectonic Deformations in the Quaternary Deposits of the Lake Van (Edremit Bay), Eastern Anatolia, Turkey .............................. Selim ÖZALP, B. Serkan AYDEMİR, Şeyda OLGUN, Barbaros ŞİMŞEK, Hasan ELMACI, Murat EVREN, 45 Ömer EMRE, M. Burak AYDIN, Oktar KURTULUŞ, Füsun ÖCAL, Aslı Z. CAN, Mehmet N. YANMAZ, Ramazan APA, Tamer Y. DUMAN/Research Article Diagenetic History of the Rock Units of Bozkır Unit Controlled by the Triassic Rifting, Bozkır-Konya ..............................................................................................Hüseyin YALÇIN, Ömer BOZKAYA, Mine TAKÇI/Research Article 63 Trace Fossils from Submarine Fan and Basin Plain Deposits of the Late Eocene Ceylan Formation, Gelibolu Peninsula (SW Thrace) ................................................................................................................ Huriye DEMİRCAN, Alfred UCHMAN/Research Article 91 Ostracod Fauna and Environmental Characteristics of Köprüköy / Erzurum (East Anatolia) Region Research and Exploration ................................................................................................................................. Ümit ŞAFAK, Meral KAYA / Research Article 113 Mineralogy and Geochemistry of the Kocadal (Torul, Gümüşhane, Eastern Black Sea Region, Turkey) Zn-Pb-Ag, Au And Cu Mineralizations ....................................İsmail CİHAN, Levent TOSUN, Özcan DUMANLILAR, İsmet CENGİZ, Taner ÜNLÜ/Research Article 139 Spatial Cluster and Outlier Identification of Geochemical Association of Elements: A Case Study in Juirui Copper Mining Area .......................................... Tien Thanh NGUYEN, Danh Tuyen VU, Le Hung TRINH, Thi Le Hang NGUYEN/Research Article 159 Investigation of the Water Resources in Köprüören Basin (Kütahya) wıth Environmental Isotopes ...................................................................................................................................................Şebnem ARSLAN/Research Article 169 Investigation of the Seismic Velocity Distribution and Crustal Structure of Turkey by means of Gravity Data ................................................................................................................................................................Uğur AKIN/Review Article 185 Geophysical Regional Gravity Map of Turkey and Its General Assessment .......................................................................................................................................................Selim ARSLAN / Review Article 203 Proposals for the Standard Presentation of Elements of Natural and Cultural Heritage Within the Scope of Geopark Projects .........................................................................................................................Yahya ÇİFTÇİ, Yıldırım GÜNGÖR/ Review Article 223 Phone : 0 (312) 201 10 00 2016 http://bulletin.mta.gov.tr Fax : 0 (312) 287 91 88 Acknowledgement ........................................................................................................................................................................................239 Adress : MTA 06520 - Ankara - TURKEY Bulletin of the Mineral Research and Exploration Notes To The Authors ...................................................................................................241 MINERALOGY AND GEOCHEMISTRY OF THE KOCADAL (TORUL, GÜMÜŞHANE, EASTERN BLACK SEA REGION, TURKEY) Zn-Pb-Ag, Au and Cu MINERALIZATIONS İsmail CİHANa*, Levent TOSUNa, Özcan DUMANLILARa, İsmet CENGİZa and Taner ÜNLÜb aDemir Export A.Ş., Maden Arama Müdürlüğü, 06440 Kızılay/Ankara bAnkara Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği, 06100 Tandoğan/Ankara Research Article Keywords: ABSTRACT Eastern Pontides, The Kocadal base and precious metal mineralizations are located in the southwest of Gümüşhane province of Kocadal Gold the eastern Pontide orogenic belt. In the vicinity of the Kocadal mineralization, Gümüşhane granite, lithologies Mineralization, of the Hamurkesen, Berdiga, and Mescitli formations, dacite porphyry and andesite porphyry are present with Conglomerate- abundant alluvium. Based on geological, mineralogical, and geochemical features, three mineralization styles Sandstone, Quartz Veins. have been recognized at the Kocadal area: (i) Mineralizations around Batarya tepe include (ia) Zn mineralization within the conglomerates and sandstones of the Hamurkesen formation and (ib) Zn-Pb-Ag-(Au) mineralization associated with dacite prophyry, (ii) Au mineralization, which occurs to the southwestern of Batarya tepe, and (iii) Cu mineralizations related to quartz veins and veinlets at Gözelerin Dere. Mineralized gravels within the conglomerates contains mainly sphalerite and pyrite, whereas hydrothermal mineralizations associated with porphyritic dacite comprise pyrite and sphalerite, with minor galena, chalcopyrite, pyrrhotite, arsenopyrite, marcasite, fahlerz, pyrargyrite, and proustite. Alteration patterns of hydrothermal mineralization in the field, from older to younger, are classified as: (i) tremolite-actinolite±garnet, (ii) quartz-sericite-chlorite, and (iii) carbonate- quartz. Mineralized gravels within the conglomerates contains mainly sphalerite and pyrite, whereas pyrite, chalcopyrite, and galena are common in quartz veins at Gözelerin Dere. Geostatistical studies based on the results Received: 08.12.2015 of geochemical analysis of core samples reveal the presence of the distinct element associations for the different Accepted: 27.01.2016 styles of mineralizations. region. First studies on the mineralizations in the study area were carried out by Baytekin and Uslu (1974). 1. Introduction Later on Çınar et al. (1983) and Türk (MTA)-Japan Joint Project (1985) (Türk (MTA)-Japon Ortak Projesi, Mineral deposits and mineral occurrences 1985) carried out geological studies in the study area. associated with the magmatic rocks in the southern All these studies were in the frame work of regional part of the Eastern Black Sea Region form an E-W prospection and mineralizations in the Kocadal area extending zone. This zone includes porphyry Cu- were considered to be hydrothermal mineralizations Mo, epithermal Au-Ag and vein type base metal and developed along the fracture systems. In 2009-2014 precious metal mineralizations (Figure 1). Kocadal Demir Export Inc carried out detailed geological base and precious metal mineralizations are located in the central part of this zone and are in the 24 km mappings and surface geochemical studies to delineate to the Southwest of Gümüşhane, in the 1/25000 scale mineralization areas and conducted core drillings to map sheets H42-a2, a3, b1 and b4. Some of the mines test dip down extensions of the mineralization. In this operational in the region are Mastra Au, Midi (Zn-Pb- work some of Demir Export’s data have been used Cu-Au-Ag) and Hazine Mağara (Pb-Zn-Au-Ag). Apart to explain and discuss geological, mineralogical and from these, there are also numerous mineralization geochemical characters of the Kocadal base metal and occurrences in the region. precious metal mineralizations and different types of mineralizations have been identified and described. By There have been numerous studies concerning basic doing this it was meant to provide some information to geology and mineralizations in and near Gümüşhane help future mineral exploration activities in the region. * Corresponding Author: İsmail CİHAN, [email protected] http://dx.doi.org/10.19111/bulletinofmre.266067 139 Gümüşhane Torul Kocadal Precious and Base Metal Mineralization Figure 1- Location map of the study area. 2. Regional Geology formation and the Gümüşhane granite. Because of these relationships, dacite porphyries can be correlated Study area is located in the Southern part of the with the Lower Eocene Zigane granitoid (Ketin 1966; Eastern Pontides (Hamilton, 1942; Ketin 1966; Ketin Bektaş et al., 1995; Karslı, 1996) present in the area, and Canıtez, 1972; Özsayar et al., 1981; Bektaş et related to the magmatic arch which was active during al., 1984). The basal rock units present in the area are Late Cretaceous-Early Eocene (Şengör and Yılmaz Paleozoic Kurtoğlu metamorphics (Yılmaz, 1972). 1981; Okay and Şahintürk 1997; Yılmaz and Karslı These rock units were intruded by Permo-Carboniferous 1997; Yılmaz et al., 1997; Bektaş et al., 1999; Şengör et granitic intrusives (Çoğulu, 1970; Yılmaz, 1972), al., 2003), (Figure 2). developed from the southern plunge of northern branch of Paleo Tethys (Dewey et al., 1973; Şengör and 3. Local Geology Yılmaz, 1981; Bektaş et al., 1999; Eyüboğlu, 2010; Eyüboğlu et al., 2012). These units were discordantly In the study area and in the surrounding areas overlain by volcano-sedimentary Hamurkesen various kinds of lithologies at various ages are formation of Lower-Middle Jurassic, characterizing present. From oldest to youngest they are; Gümüşhane rifting in marine environment related to the extensional granite, Hamurkesen (Zimoköy) formation, Berdiga tectonics (Eyüboğlu et al., 2010, 2014). This succession formation,