The gold-silver Okhotsk-Chukotka volcanic belt

Sidorov, A. A.; Волков, А. В.; Belyi, V. F.; Alekseev, V. Yu.; Kolova, E. E.

doi:10.1134/s1075701509060026

Cited by 21 publications

(11 citation statements)

References 3 publications

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“…The geological structure and metallogeny of the belt were described in a recent publication [Sidorov et al, 2009] and for this reason are not considered in detail in the present paper.…”

Section: The Okhotsk-chukchi Volcano Plutonic Belt (Ochvb)mentioning

confidence: 96%

“…This fact seems to be a reflection of the complex geological structure to be found in the OChVB Okhotsk sector. The area is dominated by multiphase magmatism (pre con and epithermal) with associating mineralization of differ ent types [Sidorov et al, 2009]. It is in this sector of the OChVB that rejuvenated epithermal fields are widely available [Goncharov et al, 1979].…”

Section: The Okhotsk-chukchi Volcano Plutonic Belt (Ochvb)mentioning

confidence: 99%

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Volcanogenic belts of the marginal sea lithosphere in the Russian Northeast and their ore potential

Sidorov

Волков

Chekhov

et al. 2011

J. Volcanolog. Seismol.

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According to the concepts of accretionary tectonics, the region of interest was a dynamically evolving active continental margin during Mesozoic/Cenozoic time; this is reflected in the generation of nine volcano plutonic belts that successively evolved from northwest to southeast. Most of these evolved in parallel with the present day location of the Kuril-Kamchatka deep sea trench: the Late Jurassic/Early Cretaceous Uda-Murgali belt (UMVB) the Uyandina Yasachnaya (UYVB), the Oloi belt (OVB), the Late Creta ceous/Paleogene Okhotsk-Chukchi belt (OChVB), the Late Cretaceous/Paleogene East Sikhote Alin' belt (ESVB), the Eocene/Oligocene Koryak-West Kamchatka belt (KWKVB), the Oligocene/Quaternary Cen tral Kamchatka belt (CKVB), and the Pliocene/Quaternary East Kamchatka belt (EKVB). The successively younger age of the volcanic belts since the Early Cretaceous is in correspondence with the displacement of the volcanic arc-trench system toward the Pacific Ocean. Apart from the above mentioned volcanogenic belts, the Omolon craton terrane also contains the pre accretionary Devonian Kedon marginal volcanogenic belt (KVB). All the volcanogenic belts and the surrounding perivolcanic zones of tectono magmatic activa tion (TMA) form the world largest metallogenic province with a polychronous volcanogenic-plutonogenic metallization of various compositions.

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“…The geological structure and metallogeny of the belt were described in a recent publication [Sidorov et al, 2009] and for this reason are not considered in detail in the present paper.…”

Section: The Okhotsk-chukchi Volcano Plutonic Belt (Ochvb)mentioning

confidence: 96%

Section: The Okhotsk-chukchi Volcano Plutonic Belt (Ochvb)mentioning

confidence: 99%

Volcanogenic belts of the marginal sea lithosphere in the Russian Northeast and their ore potential

Sidorov

Волков

Chekhov

et al. 2011

J. Volcanolog. Seismol.

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“…The Ivan'insky VTD with the Tikhoe deposit is localized in the Okhotsk segment of the OCHVB at the junction of the southeastern flank of the YKFB with the southeastern ORT. The YKFB is characterized by Au-As geochemical specialization; base-metal Ag-Sn-Pb-Zn mineralization is inherent to the ORT, and the Okhotsk segment of the OCHVB is distinguished by porphyry Cu-Mo geochemical specialization (Sidorov et al, 2009;Volkov et al, 2014). In addition, Cu-As geochemical specialization of silver minerals in ore is evidence for relation of the Tikhoe and Julietta deposits to the porphyry copper ore-forming system (Kovalenker and Plotinskaya, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…1) large Dzhugadzhak volcanic-tectonic ring structure, which is situated in the Omsukchan Riftogenic Trough (ORT) in the Okhotsk segment of the OChVB (Sidorov et al, 2009). The basement of the Ivan'insky VTD is composed of intensely deformed Jurassic sandshale rocks of the Verkhoyansk Complex inherent to the Yana-Kolyma Fold Belt (YKFB).…”

Section: Tectonic Position Of Depositmentioning

confidence: 99%

Formation conditions of high-grade gold–silver ore of epithermal Tikhoe deposit, Russian Northeast

et al. 2016

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The Tikhoe epithermal deposit is located in the Okhotsk-Chukotka volcanic belt (OChVB) 250 km northeast of Magadan. Like other deposits belonging to the Ivan'insky volcanic-plutonic depression (VTD), the Tikhoe deposit is characterized by high-grade Au-Ag ore with an average Au grade of 23.13 gpt Au and Au/Ag ratio varying from 1 : 1 to 1 : 10. The detailed explored Tikhoe-1 orebody is accompanied by a thick (20 m) aureole of argillic alteration. Pyrite is predominant among ore minerals; galena, arsenopyrite, sphalerite, Ag sulfosalts, fahlore, electrum, and küstelite are less abundant. The ore is characterized by abundant Sebearing minerals. Cu-As geochemical specialization is noted for silver minerals. Elevated Se and Fe molar fractions of the main ore minerals are caused by their formation in the near-surface argillic alteration zone. The veins and veinlets of the Tikhoe-1 ore zone formed stepwise at a temperature of 230 to 105°C from Nachloride solution enriched in Mg and Ca cations with increasing salinity. The parameters of the ore-forming fluid correspond to those of epithermal low-sulfidation deposits and assume the formation of high-grade ore under a screening unit of volcanic rocks. In general, the composition of the ore-forming fluid fits the mineralogy and geochemistry of ore at this deposit. The similarity of the ore composition and parameters of the ore-forming fluid between the Tikhoe and Julietta deposits is noteworthy. Meanwhile, differences are mainly related to the lower temperature and fluid salinity at the Julietta deposit with respect to the Tikhoe deposit. The fluid at the Julietta deposit is depleted in most components compared with that at the Tikhoe deposit except for Sb, Cd, and Ag. The results testify to a different erosion level at the deposits as derivatives of the same ore-forming system. The large scale of the latter allows us to predict the discovery of new high-grade objects, including hidden mineralization, which is not exposed at the ore field flanks and beyond them.

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“…The upper age limit refers to the upper Cretaceous-Santonian or possibly to the Campanian beginning. The duration of the formation was approximately 25 million years [57][58][59]. According to V.F.…”

Section: Geological Settingmentioning

confidence: 99%

Lithochemical Stream Sediments of the Dukat Gold–Silver Ore-Forming System (North–East of Russia)

2019

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The composition, structure and formation features of the exogenous anomalous geochemical fields (AGFs) identified by lithochemical stream sediments (LSSs) are considered using the examples of the Dukat gold–silver ore-forming system and the deposit with the same name. The research was carried out in the Balygychan–Sugoy trough (Magadan region, north–east of Russia). Areal geochemical surveys on the 1:200,000 and 1:50,000 scales were conducted. Exogenous AGFs of basic element indicators of all known mineralization types were studied. It is shown that the surveys on the 1:200,000 scale are characterized by simplicity, relative depth and the possibility to obtain information operatively about the metallogeny of the area as a whole. At the same time, the anomalies were revealed as a result of surveys often making a relatively poor component composition and low contrast compared with ores. The violation of quantitative and sometimes qualitative relationships can be seen between elements, especially those related to gold–silver mineralization. In this situation, the most informative are surveys of LSSs on the 1:50,000 scale. The AGFs were revealed as a result of their performance to have a richer component composition and high contrast, conforming to different ore types. It is shown that, while prospecting for gold–silver mineralization with LSSs in cryolithogenesis zone conditions, the binding forms study of mineralization element indicators is effective. In watercourse heads, where alluvium is practically absent, mosses are proposed for sampling, as they hold the sandy silt material firmly. The obtained results are recommended for use at all stages of prospecting, not only in the north–east of Russia but also in other similar climatic regions.

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The gold-silver Okhotsk-Chukotka volcanic belt

Cited by 21 publications

References 3 publications

Volcanogenic belts of the marginal sea lithosphere in the Russian Northeast and their ore potential

Volcanogenic belts of the marginal sea lithosphere in the Russian Northeast and their ore potential

Formation conditions of high-grade gold–silver ore of epithermal Tikhoe deposit, Russian Northeast

Lithochemical Stream Sediments of the Dukat Gold–Silver Ore-Forming System (North–East of Russia)

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