Compositional Evolution of Pyrochlore-Group Minerals in Carbonatites of the Belaya Zima Pluton, Eastern Sayan
Pyrochlore-group minerals are the main concentrators of niobium in carbonatites of the Belaya Zima alkaline pluton. Fluorcalciopyrochlore, kenopyrochlore and hydropyrochlore were identified in chemical composition. Their main characteristics are given: compositional variation, morphology, and zoning...
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| Veröffentlicht in: | Geology of ore deposits 2017-12, Vol.59 (8), p.752-764 |
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| container_title | Geology of ore deposits |
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| creator | Khromova, E. A. Doroshkevich, A. G. Sharygin, V. V. Izbrodin, L. A. |
| description | Pyrochlore-group minerals are the main concentrators of niobium in carbonatites of the Belaya Zima alkaline pluton. Fluorcalciopyrochlore, kenopyrochlore and hydropyrochlore were identified in chemical composition. Their main characteristics are given: compositional variation, morphology, and zoning. During evolution from early calcite to late ankerite carbonatites, the UO
2
, TiO
2
, REE, and Y contents gradually increased. All carbonatite types are suggested to contain initial fluorcalciopyrochlore. However, in calcite–dolomite and ankerite carbonatites, it is partially or completely hydrated due to hydrothermal processes at the late stage of the pluton. This hydration resulted in the appearance of kenopyrochlore and hydropyrochlore due to removal of Ca, Na and F, and input of Ba, H
2
O, K, Si, Fe, and probably U and REE. At the last stage of the pluton, this hydrated pyrochlore was replaced by Fe-bearing columbite. |
| doi_str_mv | 10.1134/S1075701517080037 |
| format | Article |
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2
, TiO
2
, REE, and Y contents gradually increased. All carbonatite types are suggested to contain initial fluorcalciopyrochlore. However, in calcite–dolomite and ankerite carbonatites, it is partially or completely hydrated due to hydrothermal processes at the late stage of the pluton. This hydration resulted in the appearance of kenopyrochlore and hydropyrochlore due to removal of Ca, Na and F, and input of Ba, H
2
O, K, Si, Fe, and probably U and REE. At the last stage of the pluton, this hydrated pyrochlore was replaced by Fe-bearing columbite.</description><identifier>ISSN: 1075-7015</identifier><identifier>EISSN: 1555-6476</identifier><identifier>DOI: 10.1134/S1075701517080037</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Calcite ; Composition ; Concentrators ; Dolomite ; Dolostone ; Earth and Environmental Science ; Earth Sciences ; Evolution ; Hydrothermal activity ; Iron ; Mineral Resources ; Minerals ; Minerals and Mineral Parageneses ; Niobium ; Plutons ; Pyrochlores ; Removal ; Titanium dioxide ; Uranium dioxide</subject><ispartof>Geology of ore deposits, 2017-12, Vol.59 (8), p.752-764</ispartof><rights>Pleiades Publishing, Ltd. 2017</rights><rights>Copyright Springer Science & Business Media 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a339t-ff9cf302a365dfaf013d060cda15d1b64d8f3db066e823348865295e2ae594283</citedby><cites>FETCH-LOGICAL-a339t-ff9cf302a365dfaf013d060cda15d1b64d8f3db066e823348865295e2ae594283</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S1075701517080037$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S1075701517080037$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Khromova, E. A.</creatorcontrib><creatorcontrib>Doroshkevich, A. G.</creatorcontrib><creatorcontrib>Sharygin, V. V.</creatorcontrib><creatorcontrib>Izbrodin, L. A.</creatorcontrib><title>Compositional Evolution of Pyrochlore-Group Minerals in Carbonatites of the Belaya Zima Pluton, Eastern Sayan</title><title>Geology of ore deposits</title><addtitle>Geol. Ore Deposits</addtitle><description>Pyrochlore-group minerals are the main concentrators of niobium in carbonatites of the Belaya Zima alkaline pluton. Fluorcalciopyrochlore, kenopyrochlore and hydropyrochlore were identified in chemical composition. Their main characteristics are given: compositional variation, morphology, and zoning. During evolution from early calcite to late ankerite carbonatites, the UO
2
, TiO
2
, REE, and Y contents gradually increased. All carbonatite types are suggested to contain initial fluorcalciopyrochlore. However, in calcite–dolomite and ankerite carbonatites, it is partially or completely hydrated due to hydrothermal processes at the late stage of the pluton. This hydration resulted in the appearance of kenopyrochlore and hydropyrochlore due to removal of Ca, Na and F, and input of Ba, H
2
O, K, Si, Fe, and probably U and REE. At the last stage of the pluton, this hydrated pyrochlore was replaced by Fe-bearing columbite.</description><subject>Calcite</subject><subject>Composition</subject><subject>Concentrators</subject><subject>Dolomite</subject><subject>Dolostone</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Evolution</subject><subject>Hydrothermal activity</subject><subject>Iron</subject><subject>Mineral Resources</subject><subject>Minerals</subject><subject>Minerals and Mineral Parageneses</subject><subject>Niobium</subject><subject>Plutons</subject><subject>Pyrochlores</subject><subject>Removal</subject><subject>Titanium dioxide</subject><subject>Uranium dioxide</subject><issn>1075-7015</issn><issn>1555-6476</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp1kE9Lw0AQxRdRsFY_gLcFr0Zn_yY5aqhVqFioXryEbbJrU9LduJsI_fZuqOBBPM3Ae7_HvEHoksANIYzfrgikIgUiSAoZAEuP0IQIIRLJU3kc9ygno36KzkLYAnBBgUzQrnC7zoWmb5xVLZ59uXYYd-wMXu69qzat8zqZezd0-Lmx2qs24MbiQvl1RPqm12E09xuN73Wr9gq_NzuFlzHH2Ws8U6HX3uJVVOw5OjGR1xc_c4reHmavxWOyeJk_FXeLRDGW94kxeWUYUMWkqI0yQFgNEqpaEVGTteR1Zli9Bil1RhnjWSYFzYWmSouc04xN0dUht_Puc9ChL7du8LFgKGNr4ITlEZwicnBV3oXgtSk7H0_3-5JAOX61_PPVyNADE6LXfmj_m_w_9A0xWnk8</recordid><startdate>20171201</startdate><enddate>20171201</enddate><creator>Khromova, E. A.</creator><creator>Doroshkevich, A. G.</creator><creator>Sharygin, V. V.</creator><creator>Izbrodin, L. A.</creator><general>Pleiades Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>20171201</creationdate><title>Compositional Evolution of Pyrochlore-Group Minerals in Carbonatites of the Belaya Zima Pluton, Eastern Sayan</title><author>Khromova, E. A. ; Doroshkevich, A. G. ; Sharygin, V. V. ; Izbrodin, L. A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a339t-ff9cf302a365dfaf013d060cda15d1b64d8f3db066e823348865295e2ae594283</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Calcite</topic><topic>Composition</topic><topic>Concentrators</topic><topic>Dolomite</topic><topic>Dolostone</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Evolution</topic><topic>Hydrothermal activity</topic><topic>Iron</topic><topic>Mineral Resources</topic><topic>Minerals</topic><topic>Minerals and Mineral Parageneses</topic><topic>Niobium</topic><topic>Plutons</topic><topic>Pyrochlores</topic><topic>Removal</topic><topic>Titanium dioxide</topic><topic>Uranium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Khromova, E. A.</creatorcontrib><creatorcontrib>Doroshkevich, A. G.</creatorcontrib><creatorcontrib>Sharygin, V. V.</creatorcontrib><creatorcontrib>Izbrodin, L. A.</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Geology of ore deposits</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Khromova, E. A.</au><au>Doroshkevich, A. G.</au><au>Sharygin, V. V.</au><au>Izbrodin, L. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Compositional Evolution of Pyrochlore-Group Minerals in Carbonatites of the Belaya Zima Pluton, Eastern Sayan</atitle><jtitle>Geology of ore deposits</jtitle><stitle>Geol. Ore Deposits</stitle><date>2017-12-01</date><risdate>2017</risdate><volume>59</volume><issue>8</issue><spage>752</spage><epage>764</epage><pages>752-764</pages><issn>1075-7015</issn><eissn>1555-6476</eissn><abstract>Pyrochlore-group minerals are the main concentrators of niobium in carbonatites of the Belaya Zima alkaline pluton. Fluorcalciopyrochlore, kenopyrochlore and hydropyrochlore were identified in chemical composition. Their main characteristics are given: compositional variation, morphology, and zoning. During evolution from early calcite to late ankerite carbonatites, the UO
2
, TiO
2
, REE, and Y contents gradually increased. All carbonatite types are suggested to contain initial fluorcalciopyrochlore. However, in calcite–dolomite and ankerite carbonatites, it is partially or completely hydrated due to hydrothermal processes at the late stage of the pluton. This hydration resulted in the appearance of kenopyrochlore and hydropyrochlore due to removal of Ca, Na and F, and input of Ba, H
2
O, K, Si, Fe, and probably U and REE. At the last stage of the pluton, this hydrated pyrochlore was replaced by Fe-bearing columbite.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S1075701517080037</doi><tpages>13</tpages></addata></record> |
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| subjects | Calcite Composition Concentrators Dolomite Dolostone Earth and Environmental Science Earth Sciences Evolution Hydrothermal activity Iron Mineral Resources Minerals Minerals and Mineral Parageneses Niobium Plutons Pyrochlores Removal Titanium dioxide Uranium dioxide |
| title | Compositional Evolution of Pyrochlore-Group Minerals in Carbonatites of the Belaya Zima Pluton, Eastern Sayan |
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