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Differentiated Mafic–Ultramafic Intrusions of the Kruglogorsky Type in the Noril’sk Area: Petrology and Ore Potential
Intrusions of the Kruglogorsky type are an integral part of magmatic formations in the Noril’sk area. The marginal portions of these intrusions are composed of microdolerite, dolerite, and contact gabbrodolerite. The central parts of the intrusions consist of leucogabbro and of olivine-free, olivine...
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| Published in: | Petrology 2018-05, Vol.26 (3), p.280-313 |
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| creator | Sluzhenikin, S. F. Malitch, K. N. Grigor’eva, A. V. |
| description | Intrusions of the Kruglogorsky type are an integral part of magmatic formations in the Noril’sk area. The marginal portions of these intrusions are composed of microdolerite, dolerite, and contact gabbrodolerite. The central parts of the intrusions consist of leucogabbro and of olivine-free, olivine-bearing, and olivine gabbro-dolerite. Leucogabbro is a characteristic rock of this type of intrusions and sometimes composes up to half of the thicknesses of the rock units. The rocks with plagioporphyritic textures are widespread. Olivine-free, olivine-bearing, and olivine gabbro-dolerite occur as horizons with indistinct boundaries, which are unevenly distributed over the vertical sections of the lithological units. The olivine is the most magnesian (
Fo
89-64
) and richest in Ni (up to 0.23 wt % NiO) in the olivine gabbro-dolerite. The clinopyroxene is represented by augite (
Fs
12-29
). The rock-forming minerals are typically zoned. The Sr isotopic composition of the rocks (calculated for an age of 250 Ma) varies within a considerable range (
87
Sr/
86
Sr = 0.705972–0.708006), due to metasomatic alterations. The variations in the Nd and Sr isotopic composition of the Kruglogorsky intrusion are close to those in rocks of the Noril’sk-type ore-bearing intrusions. The olivine-bearing and taxitic gabbro-dolerite host Pt–Cu–Ni ore mineralization, which are of economic value for disseminated ores of the Talnakh area. |
| doi_str_mv | 10.1134/S0869591118030050 |
| format | article |
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Fo
89-64
) and richest in Ni (up to 0.23 wt % NiO) in the olivine gabbro-dolerite. The clinopyroxene is represented by augite (
Fs
12-29
). The rock-forming minerals are typically zoned. The Sr isotopic composition of the rocks (calculated for an age of 250 Ma) varies within a considerable range (
87
Sr/
86
Sr = 0.705972–0.708006), due to metasomatic alterations. The variations in the Nd and Sr isotopic composition of the Kruglogorsky intrusion are close to those in rocks of the Noril’sk-type ore-bearing intrusions. The olivine-bearing and taxitic gabbro-dolerite host Pt–Cu–Ni ore mineralization, which are of economic value for disseminated ores of the Talnakh area.</description><identifier>ISSN: 0869-5911</identifier><identifier>EISSN: 1556-2085</identifier><identifier>DOI: 10.1134/S0869591118030050</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Area ; Augite ; Bearing ; Chemical composition ; Composition ; Copper ; Earth and Environmental Science ; Earth Sciences ; Gabbro ; Geochemistry ; Intrusion ; Isotope composition ; Isotopes ; Lithology ; Magma ; Mineralization ; Mineralogy ; Minerals ; Nickel ; Olivine ; Ores ; Petrology ; Rock ; Rocks ; Strontium 87 ; Strontium isotopes ; Vertical sections</subject><ispartof>Petrology, 2018-05, Vol.26 (3), p.280-313</ispartof><rights>Pleiades Publishing, Ltd. 2018</rights><rights>Petrology is a copyright of Springer, (2018). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a339t-84257bfa1b49941bc53dbd838e5d5ecc2dc0ab4a1b7e8661b13ba21a87300bf53</citedby><cites>FETCH-LOGICAL-a339t-84257bfa1b49941bc53dbd838e5d5ecc2dc0ab4a1b7e8661b13ba21a87300bf53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Sluzhenikin, S. F.</creatorcontrib><creatorcontrib>Malitch, K. N.</creatorcontrib><creatorcontrib>Grigor’eva, A. V.</creatorcontrib><title>Differentiated Mafic–Ultramafic Intrusions of the Kruglogorsky Type in the Noril’sk Area: Petrology and Ore Potential</title><title>Petrology</title><addtitle>Petrology</addtitle><description>Intrusions of the Kruglogorsky type are an integral part of magmatic formations in the Noril’sk area. The marginal portions of these intrusions are composed of microdolerite, dolerite, and contact gabbrodolerite. The central parts of the intrusions consist of leucogabbro and of olivine-free, olivine-bearing, and olivine gabbro-dolerite. Leucogabbro is a characteristic rock of this type of intrusions and sometimes composes up to half of the thicknesses of the rock units. The rocks with plagioporphyritic textures are widespread. Olivine-free, olivine-bearing, and olivine gabbro-dolerite occur as horizons with indistinct boundaries, which are unevenly distributed over the vertical sections of the lithological units. The olivine is the most magnesian (
Fo
89-64
) and richest in Ni (up to 0.23 wt % NiO) in the olivine gabbro-dolerite. The clinopyroxene is represented by augite (
Fs
12-29
). The rock-forming minerals are typically zoned. The Sr isotopic composition of the rocks (calculated for an age of 250 Ma) varies within a considerable range (
87
Sr/
86
Sr = 0.705972–0.708006), due to metasomatic alterations. The variations in the Nd and Sr isotopic composition of the Kruglogorsky intrusion are close to those in rocks of the Noril’sk-type ore-bearing intrusions. The olivine-bearing and taxitic gabbro-dolerite host Pt–Cu–Ni ore mineralization, which are of economic value for disseminated ores of the Talnakh area.</description><subject>Area</subject><subject>Augite</subject><subject>Bearing</subject><subject>Chemical composition</subject><subject>Composition</subject><subject>Copper</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Gabbro</subject><subject>Geochemistry</subject><subject>Intrusion</subject><subject>Isotope composition</subject><subject>Isotopes</subject><subject>Lithology</subject><subject>Magma</subject><subject>Mineralization</subject><subject>Mineralogy</subject><subject>Minerals</subject><subject>Nickel</subject><subject>Olivine</subject><subject>Ores</subject><subject>Petrology</subject><subject>Rock</subject><subject>Rocks</subject><subject>Strontium 87</subject><subject>Strontium isotopes</subject><subject>Vertical sections</subject><issn>0869-5911</issn><issn>1556-2085</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp1kL9OwzAYxC0EEqXwAGyWmAO2YycOW1X-VRRaiXaO7MQuadO42M6Qre_AxOv1SUhaJAbE9OnT_e5OOgAuMbrGOKQ3b4hHCUswxhyFCDF0BHqYsSggiLNj0OvkoNNPwZlzS4QopYj2QHNXaK2sqnwhvMrhi9BFttt-zktvxbp74KjytnaFqRw0Gvp3BZ9tvSjNwli3auCs2ShYVHvh1dii3G2_3AoOrBK3cKq8NS3aQFHlcGIVnBq_LyvPwYkWpVMXP7cP5g_3s-FTMJ48joaDcSDCMPEBp4TFUgssaZJQLDMW5jLnIVcsZyrLSJ4hIWmrx4pHEZY4lIJgweN2BqlZ2AdXh9yNNR-1cj5dmtpWbWVKECURxjHpKHygMmucs0qnG1ushW1SjNJu4fTPwq2HHDyuZauFsr_J_5u-AeFJgGA</recordid><startdate>20180501</startdate><enddate>20180501</enddate><creator>Sluzhenikin, S. F.</creator><creator>Malitch, K. N.</creator><creator>Grigor’eva, A. V.</creator><general>Pleiades Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7XB</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope></search><sort><creationdate>20180501</creationdate><title>Differentiated Mafic–Ultramafic Intrusions of the Kruglogorsky Type in the Noril’sk Area: Petrology and Ore Potential</title><author>Sluzhenikin, S. F. ; Malitch, K. N. ; Grigor’eva, A. V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a339t-84257bfa1b49941bc53dbd838e5d5ecc2dc0ab4a1b7e8661b13ba21a87300bf53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Area</topic><topic>Augite</topic><topic>Bearing</topic><topic>Chemical composition</topic><topic>Composition</topic><topic>Copper</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Gabbro</topic><topic>Geochemistry</topic><topic>Intrusion</topic><topic>Isotope composition</topic><topic>Isotopes</topic><topic>Lithology</topic><topic>Magma</topic><topic>Mineralization</topic><topic>Mineralogy</topic><topic>Minerals</topic><topic>Nickel</topic><topic>Olivine</topic><topic>Ores</topic><topic>Petrology</topic><topic>Rock</topic><topic>Rocks</topic><topic>Strontium 87</topic><topic>Strontium isotopes</topic><topic>Vertical sections</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sluzhenikin, S. F.</creatorcontrib><creatorcontrib>Malitch, K. N.</creatorcontrib><creatorcontrib>Grigor’eva, A. 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F.</au><au>Malitch, K. N.</au><au>Grigor’eva, A. V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Differentiated Mafic–Ultramafic Intrusions of the Kruglogorsky Type in the Noril’sk Area: Petrology and Ore Potential</atitle><jtitle>Petrology</jtitle><stitle>Petrology</stitle><date>2018-05-01</date><risdate>2018</risdate><volume>26</volume><issue>3</issue><spage>280</spage><epage>313</epage><pages>280-313</pages><issn>0869-5911</issn><eissn>1556-2085</eissn><abstract>Intrusions of the Kruglogorsky type are an integral part of magmatic formations in the Noril’sk area. The marginal portions of these intrusions are composed of microdolerite, dolerite, and contact gabbrodolerite. The central parts of the intrusions consist of leucogabbro and of olivine-free, olivine-bearing, and olivine gabbro-dolerite. Leucogabbro is a characteristic rock of this type of intrusions and sometimes composes up to half of the thicknesses of the rock units. The rocks with plagioporphyritic textures are widespread. Olivine-free, olivine-bearing, and olivine gabbro-dolerite occur as horizons with indistinct boundaries, which are unevenly distributed over the vertical sections of the lithological units. The olivine is the most magnesian (
Fo
89-64
) and richest in Ni (up to 0.23 wt % NiO) in the olivine gabbro-dolerite. The clinopyroxene is represented by augite (
Fs
12-29
). The rock-forming minerals are typically zoned. The Sr isotopic composition of the rocks (calculated for an age of 250 Ma) varies within a considerable range (
87
Sr/
86
Sr = 0.705972–0.708006), due to metasomatic alterations. The variations in the Nd and Sr isotopic composition of the Kruglogorsky intrusion are close to those in rocks of the Noril’sk-type ore-bearing intrusions. The olivine-bearing and taxitic gabbro-dolerite host Pt–Cu–Ni ore mineralization, which are of economic value for disseminated ores of the Talnakh area.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S0869591118030050</doi><tpages>34</tpages></addata></record> |
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| ispartof | Petrology, 2018-05, Vol.26 (3), p.280-313 |
| issn | 0869-5911 1556-2085 |
| language | eng |
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| source | Springer Link |
| subjects | Area Augite Bearing Chemical composition Composition Copper Earth and Environmental Science Earth Sciences Gabbro Geochemistry Intrusion Isotope composition Isotopes Lithology Magma Mineralization Mineralogy Minerals Nickel Olivine Ores Petrology Rock Rocks Strontium 87 Strontium isotopes Vertical sections |
| title | Differentiated Mafic–Ultramafic Intrusions of the Kruglogorsky Type in the Noril’sk Area: Petrology and Ore Potential |
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