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all geography including DSDP/ODP Sites and Legs
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Asia
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Norilsk region (1)
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Commonwealth of Independent States
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commodities
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metal ores
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copper ores (1)
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nickel ores (1)
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geochronology methods
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paleomagnetism (1)
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geologic age
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igneous rocks
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igneous rocks
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Primary terms
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Asia
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Norilsk region (1)
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Siberian Platform (1)
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igneous rocks
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volcanic rocks
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basalts
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flood basalts (1)
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trap rocks (1)
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Mesozoic
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Triassic
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Lower Triassic
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Permian-Triassic boundary (1)
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metal ores
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copper ores (1)
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nickel ores (1)
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paleomagnetism (1)
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Paleozoic
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Permian
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Upper Permian
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rock formations
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Siberian Traps (1)
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GeoRef Categories
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Khakancha River
Paleomagnetism of trap basalts in the northwestern Siberian craton, from core data Available to Purchase
Recent Advances in the Noril'sk Model and Its Application for Exploration of Ni-Cu-PGE Sulfide Deposits Available to Purchase
Abstract Recent analysis of data for the Noril'sk region defines new exploration criteria that can be used to assist in the discovery of Noril'sk- type Ni-Cu-platinum group elements (PGE) deposits. Volcanic-plutonic depressions are identified as ore-controlling structures that are formed during the discharge of lava from magma chambers. Deep seismic sounding, magnetic, and gravimetric data outline the distribution of these depressions. They appear to be primary regional structures controlling placement of intrusions in the region. They are confined to a zone of continued pericratonic subsidence located in shoulder structures of a Permo-Triassic rift system. Main structural elements within the Earth's crust underlying the volcanic-plutonic depressions have been identified. Magnetic and gravimetric signatures of the Noril'sk volcanic-plutonic depressions and mineralized intrusions can be used as exploration guides. These data provide regional and local exploration guides that are outlined for use in the search for Noril'sk-style deposits in other large igneous provinces. The internal structure, zoning in intrusions, and host rock alteration can also help determine the potential for significant mineralization in the intrusions. The distribution of sulfides, copper, nickel, and PGE minerals in or near the intrusions and their relation to the shape of the intrusion help to establish trends in ore localization and is a valuable guide for drilling. The distribution of PGE concentrations in the Talnakh intrusion indicates strong positive correlation with the distribution of copper and nickel grades.