Tectonic Triggers for Postsubduction Magmatic-Hydrothermal Gold Metallogeny in the Late Cenozoic Anatolian Metallogenic Trend, Turkey

Abstract The newly defined, 1,500-km-long, late Cenozoic Anatolian metallogenic trend of Turkey is the central segment of the western Tethyan metallogenic belt and formed after the closure of the southern Neotethys Ocean. Mineral deposit discoveries along this trend show that the Oligocene to Miocene igneous units are highly prospective for gold-rich porphyry- and epithermal-style mineralization (~27 Moz) but that copper endowment is poor. However, the temporal and spatial constraints on late Cenozoic gold districts and isolated prospects and their tectonic affinity are poorly known, despite recent efforts. We herein provide new U-Pb and Re-Os age data and field observations from Miocene gold prospects and deposits throughout the Anatolian trend, which we interpret together with previously published age data in the region. We define nine new porphyry and epithermal districts: Simav, İzmir, Uşak, Bodrum, Konya, Aksaray, Kayseri, Tunceli, and Ağri. Gold-rich porphyry and epithermal systems peaked at (1) 25 to 17 Ma in eastern Anatolia, (2) 21 to 9 Ma in western Anatolia, and (3) 10 to 3 Ma in central Anatolia. The westward migration of porphyry and epithermal mineralization from eastern to central Anatolia is interpreted to reflect slab break-off propagation and gap opening after the onset of the Arabian continental collision. Conversely, the southwestward migration of the magmatic front and associated mineralization in western Anatolia resulted from the acceleration of the Aegean slab rollback and subsequent lateral tearing (15–8 Ma). Thus, the bulk of gold mineralization formed in response to the slab segmentation and thermal events at 25 and 15 Ma.

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Summary terrane, mineral deposit, and metallogenic belt maps of the Russian Far East, Alaska, and the Canadian Cordillera

Open-File Report ◽

10.3133/ofr98136 ◽

1998 ◽

Cited By ~ 8

Author(s):

Warren J. Nokleberg ◽

Timothy D. West ◽

Kenneth M. Dawson ◽

Vladimir I. Shpikerman ◽

Thomas K. Bundtzen ◽

...

Keyword(s):

Russian Far East ◽

Far East ◽

Mineral Deposit ◽

Canadian Cordillera ◽

Metallogenic Belt ◽

The Russian Far East

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Mineral deposit and metallogenic belt maps of the Russian Far East, Alaska, and the Canadian cordillera

Open-File Report ◽

10.3133/ofr97161 ◽

1997 ◽

Author(s):

Warren J. Nokleberg ◽

Timothy D. West ◽

Kenneth M. Dawson ◽

Vladimir I. Shpikerman ◽

Thomas K. Bundtzen ◽

...

Keyword(s):

Russian Far East ◽

Far East ◽

Mineral Deposit ◽

Canadian Cordillera ◽

Metallogenic Belt ◽

The Russian Far East

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Re–Os Pyrite Geochronological Evidence of Three Mineralization Styles within the Jinchang Gold Deposit, Yanji–Dongning Metallogenic Belt, Northeast China

Minerals ◽

10.3390/min8100448 ◽

2018 ◽

Vol 8 (10) ◽

pp. 448 ◽

Cited By ~ 2

Author(s):

Shun-Da Li ◽

Zhi-Gao Wang ◽

Ke-Yong Wang ◽

Wen-Yan Cai ◽

Da-Wei Peng ◽

...

Keyword(s):

Gold Deposit ◽

Northeast China ◽

Gold Mineralization ◽

Metallogenic Belt ◽

Isotopic Analyses ◽

Mantle Sources ◽

Stage 1 ◽

Geochronological Evidence ◽

Gold Bearing

The Jinchang gold deposit is located in the eastern Yanji–Dongning Metallogenic Belt in Northeast China. The orebodies of the deposit are hosted within granite, diorite, and granodiorite, and are associated with gold-mineralized breccia pipes, disseminated gold in ores, and fault-controlled gold-bearing veins. Three paragenetic stages were identified: (1) early quartz–pyrite–arsenopyrite (stage 1); (2) quartz–pyrite–chalcopyrite (stage 2); and (3) late quartz–pyrite–galena–sphalerite (stage 3). Gold is hosted predominantly within pyrite. Pyrite separated from quartz–pyrite–arsenopyrite cement within the breccia-hosted ores (Py1) yield a Re–Os isochron age of 102.9 ± 2.7 Ma (MSWD = 0.17). Pyrite crystals from the quartz–pyrite–chalcopyrite veinlets (Py2) yield a Re–Os isochron age of 102.0 ± 3.4 Ma (MSWD = 0.2). Pyrite separated from quartz–pyrite–galena–sphalerite veins (Py3) yield a Re–Os isochron age of 100.9 ± 3.1 Ma (MSWD = 0.019). Re–Os isotopic analyses of the three types of auriferous pyrite suggest that gold mineralization in the Jinchang Deposit occurred at 105.6–97.8 Ma (includes uncertainty). The initial 187Os/188Os values of the pyrites range between 0.04 and 0.60, suggesting that Os in the pyrite crystals was derived from both crust and mantle sources.

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The Age of Gold Mineralization in the Yana–Kolyma Metallogenic Belt, Northeastern Russia: First Data of Re–Os Isotope Geochronology of Native Gold

Russian Journal of Pacific Geology ◽

10.1134/s1819714021040035 ◽

2021 ◽

Vol 15 (4) ◽

pp. 293-306

Author(s):

V. Yu. Fridovsky ◽

N. A. Goryachev ◽

R. Sh. Krymsky ◽

M. V. Kudrin ◽

B. V. Belyatsky ◽

...

Keyword(s):

Native Gold ◽

Gold Mineralization ◽

Northeastern Russia ◽

Isotope Geochronology ◽

Metallogenic Belt ◽

Os Isotope

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The two-stage Aegean extension, from localized to distributed, a result of slab rollback acceleration

Canadian Journal of Earth Sciences ◽

10.1139/cjes-2015-0203 ◽

2016 ◽

Vol 53 (11) ◽

pp. 1142-1157 ◽

Cited By ~ 34

Author(s):

Jean-Pierre Brun ◽

Claudio Faccenna ◽

Frédéric Gueydan ◽

Dimitrios Sokoutis ◽

Mélody Philippon ◽

...

Keyword(s):

Middle Miocene ◽

Middle Eocene ◽

Sedimentary Basins ◽

Ductile Deformation ◽

Metamorphic Rocks ◽

Western Anatolia ◽

Two Stage ◽

The North ◽

Slab Rollback ◽

Slab Tearing

Back-arc extension in the Aegean, which was driven by slab rollback since 45 Ma, is described here for the first time in two stages. From Middle Eocene to Middle Miocene, deformation was localized leading to (i) the exhumation of high-pressure metamorphic rocks to crustal depths, (ii) the exhumation of high-temperature metamorphic rocks in core complexes, and (iii) the deposition of sedimentary basins. Since Middle Miocene, extension distributed over the whole Aegean domain controlled the deposition of onshore and offshore Neogene sedimentary basins. We reconstructed this two-stage evolution in 3D and four steps at Aegean scale by using available ages of metamorphic and sedimentary processes, geometry, and kinematics of ductile deformation, paleomagnetic data, and available tomographic models. The restoration model shows that the rate of trench retreat was around 0.6 cm/year during the first 30 My and then accelerated up to 3.2 cm/year during the last 15 My. The sharp transition observed in the mode of extension, localized versus distributed, in Middle Miocene correlates with the acceleration of trench retreat and is likely a consequence of the Hellenic slab tearing documented by mantle tomography. The development of large dextral northeast–southwest strike-slip faults, since Middle Miocene, is illustrated by the 450 km long fault zone, offshore from Myrthes to Ikaria and onshore from Izmir to Balikeshir, in Western Anatolia. Therefore, the interaction between the Hellenic trench retreat and the westward displacement of Anatolia started in Middle Miocene, almost 10 Ma before the propagation of the North Anatolian Fault in the North Aegean.

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«Cimmero-Scythian» antiquities from Central Anatolia

Восток Афро-Азиатские общества история и современность ◽

10.31857/s086919080017592-8 ◽

2021 ◽

pp. 54

Author(s):

Sergey V. Makhortykh

Keyword(s):

Ethnic Composition ◽

Central Anatolia ◽

Western Anatolia ◽

Asian Origin ◽

Near Eastern ◽

Western Asia ◽

Archaeological Materials ◽

Ancient Times ◽

Different Cultures ◽

Significant Concentration

Central Anatolia is one of the regions of Western Asia, where the most significant concentration of archaeological materials connected with the Eurasian nomads of the early Scythian time is recorded. The flat plains of Central Anatolia had good pastures and served as a space where different cultures communicated with each other since ancient times. In the 7th–6th centuries BC this territory was located between Western Anatolia with Lydia and the eastern Greek centers and Eastern Anatolia, which was the zone of interest of the Urartu and Assyria. Small local "principalities" were localized here. These principalities were probably controlled by well-armed and mobile nomads, who used this territory as a base for raids on neighboring as well as more distant regions. An important and most numerous category of nomad inventory coming from the region is constituted by bronze socketed arrowheads found in burials in the province of Amasya, Imirler, Gordion and on the local settlements (Boğazköy, Kaman-Kalehöyük, Kerkenez Dağ). The article introduces their typology and provides analogies coming from the Eurasian monuments of the 7th–6th centuries BC. The study of early nomadic complexes from Anatolia shows theirsyncretic nature, which is influenced by artifacts of the Cimmerian, Scythian, and Сentral Asian origin as well as the local Near Eastern items. It highlights the complex ethnic composition of the nomadic groups located here in the 7th–6th centuries BC that does not allow attributing all these materials to a single group, for example, the Cimmerians.

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Geological Correlation Between Northern Cyprus And Southern Anatolia

Canadian Journal of Earth Sciences ◽

10.1139/cjes-2020-0129 ◽

2021 ◽

Author(s):

Yucel Yilmaz

Keyword(s):

Carbonate Platform ◽

Middle Eocene ◽

Source Region ◽

Oceanic Lithosphere ◽

Late Eocene ◽

Central Anatolia ◽

Late Cenozoic ◽

Ophiolitic Mélange ◽

South Central ◽

Northern Cyprus

The island of Cyprus constitutes a fragment of southern Anatolia separated from the mainland by left-oblique transtension in late Cenozoic time. However, a geological framework of offset features of the south-central Anatolia, for comparison of Cyprus with a source region within and west of the southeastern Anatolian suture zone, has not yet been developed. In this paper, I enumerate, describe, and compare a full suite of potentially correlative spatial and temporal elements exposed in both regions. Northern Cyprus and south-central Anatolia have identical tectonostratigraphic units. At the base of both belts, crop out ophiolitic mélange-accretionary complex generated during the northward subduction of the NeoTethyan Oceanic lithosphere from the Late Cretaceous until the end of middle Eocene. The nappes of the Taurus carbonate platform were thrust above this internally chaotic unit during late Eocene. They began to move as a coherent nappe pile from that time onward. An asymmetrical flysch basin was formed in front of this southward moving nappe pile during the early Miocene. The nappes were then thrust over the flysch basin fill and caused its tight folding. Cyprus separated from Anatolia in the Pleistocene-Holocene when, transtensional oblique faults with dip-slip components caused the development of the Adana and Iskenderun basins and the separation of Cyprus from Anatolia.

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