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Conference Proceedings

PACRIM 99 Congress

Conference Proceedings

PACRIM 99 Congress

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Gold Deposits of the Russian North East (The Northern Circum Pacific): Metallogenic Overview

North Eastern Russia encompasses the northern part of the Circum Pacific. The region comprises various tectonostratigraphic terranes, including cratonic blocks, fragments of volcanic arcs, accretionary wedge terranes, oceanic crust and passive continental margins. The terranes have been accreted to the eastern margin of the Siberian Craton in the Late Mesozoic. The prominent structures of the region are extended zones of the Mesozoic flysch and turbidites. Another important structure is the 3000 km long Okhotsk-Chukotka volcanic arc which marks the Cretaceous active continental margin of northern Eurasia. The youngest structure of the region is the 2000 km long Late Cainozoic Kamchatka-Kuril island arc system. North Eastern Russia is the main gold producing region of the Russian Federation. Since the beginning of recorded gold production in 1932 until 1995 the region has produced 2575 t (83M oz) of gold. Most of it, 2439.5 t, has been produced from placers. Owing to depletion of alluvial gold resources, exploration and mining emphasis is currently switching to the development of the lode deposits. At least five distinct types of the gold mineralisation are reported in North Eastern Russia - mesothermal gold mineralisation in the Mesozoic fold belts, Paleozoic epithermal gold mineralisation occurring within Omolon block, epithermal gold mineralisation related to the Mesozoic volcanics, Cainozoic epithermal gold mineralisation, gold-bearing Cu-porphyry deposits. The current paper introduces the metallogeny of lode-gold deposits of North Eastern Russia. It provides the review of the regional geology, the selected gold provinces and representative deposits with an emphasis on the mineralisation styles and distribution control.
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  • Published: 1998
  • PDF Size: 5.684 Mb.
  • Unique ID: P199904077

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