Sulphide Segregation in Ferropicrites from the Pechenga Complex, Kola Peninsula, Russia
The Palaeoproterozoic Ni–Cu sulphide deposits of the Pechenga Complex, Kola Peninsula, occur in the lower parts of ferropicritic intrusions emplaced into the phyllitic and tuffaceous sedimentary unit of the Pilgujärvi Zone. The intrusive rocks are comagmatic with extrusive ferropicrites of the over...
Gespeichert in:
| Veröffentlicht in: | Journal of petrology 2000-12, Vol.41 (12), p.1721-1742 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 1742 |
|---|---|
| container_issue | 12 |
| container_start_page | 1721 |
| container_title | Journal of petrology |
| container_volume | 41 |
| creator | BRÜGMANN, G. E. HANSKI, E. J. NALDRETT, A. J. SMOLKIN, V. F. |
| description | The Palaeoproterozoic Ni–Cu sulphide deposits of the Pechenga Complex, Kola Peninsula, occur in the lower parts of ferropicritic intrusions emplaced into the phyllitic and tuffaceous sedimentary unit of the Pilgujärvi Zone. The intrusive rocks are comagmatic with extrusive ferropicrites of the overlying volcanic formation. Massive lavas and chilled margins from layered flows and intrusions contain Os > Ru > Pt = Pd > Cu. R-factors (silicate-sulphide mass ratio) are high and of the order of 104–105, and they indicate the segregation of only small amounts of sulphide liquid in the parental ferropicritic magma. In differentiated flows and intrusions the sulphide liquids segregated and accumulated at the base of these bodies, but because of a low silicate–sulphide mass ratio the sulphide liquids had a low PGE tenor and Pt/Ir and Cu/Ir ratios similar to the parental silicate melts. During cooling the sulphide liquid crystallized 40–50% of monosulphide solid solution (mss) and the residual sulphide liquid became enriched in Cu, Pt and Pd and depleted in Ir, Os and Ru. The Cu-rich sulphide liquid locally assimilated components of the surrounding S-rich sediments as suggested by the radiogenic Os isotopic composition of some sulphide ores (γOs > 100). |
| doi_str_mv | 10.1093/petrology/41.12.1721 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_219897586</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>374198971</sourcerecordid><originalsourceid>FETCH-LOGICAL-a400t-61f0d17fd4f8b4385c926de4a4a5fb5ac4efdf5c9c723ab35f812b8c91f26fe83</originalsourceid><addsrcrecordid>eNo9kEtLAzEUhYMoWKv_wEVw3am5Sea1lKJWKlisL9yEdOamTZ1OxmQG7L93SsXVhY_znQuHkEtgY2C5uG6w9a5yq921hDHwMaQcjsgAZMIiLiE-JgPGOI9ELNgpOQthwxj0nA3I-6KrmrUtkS5w5XGlW-tqamt6h967xhbethio8W5L2zXSORZrrFeaTty2qfBnRGeu0j2ubR26So_ocxeC1efkxOgq4MXfHZLXu9uXyTR6fLp_mNw8Rloy1kYJGFZCakppsqUUWVzkPClRaqljs4x1IdGUpqdFyoVeithkwJdZkYPhicFMDMnVobfx7rvD0KqN63zdv1Qc8ixP4yzpQ_IQKrwLwaNRjbdb7XcKmNovqP4XVBIUcLVfsNeig2ZDiz__jvZfKklFGqvpx6dib3I-E_O5YuIXf5B3ag</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>219897586</pqid></control><display><type>article</type><title>Sulphide Segregation in Ferropicrites from the Pechenga Complex, Kola Peninsula, Russia</title><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><source>Oxford University Press Journals All Titles (1996-Current)</source><source>Alma/SFX Local Collection</source><source>Free Full-Text Journals in Chemistry</source><creator>BRÜGMANN, G. E. ; HANSKI, E. J. ; NALDRETT, A. J. ; SMOLKIN, V. F.</creator><creatorcontrib>BRÜGMANN, G. E. ; HANSKI, E. J. ; NALDRETT, A. J. ; SMOLKIN, V. F.</creatorcontrib><description>The Palaeoproterozoic Ni–Cu sulphide deposits of the Pechenga Complex, Kola Peninsula, occur in the lower parts of ferropicritic intrusions emplaced into the phyllitic and tuffaceous sedimentary unit of the Pilgujärvi Zone. The intrusive rocks are comagmatic with extrusive ferropicrites of the overlying volcanic formation. Massive lavas and chilled margins from layered flows and intrusions contain <3–7 ng/g Pd and Pt and <0·02–2·0 ng/g Ir, Os and Ru with low Pd/Ir ratios of 5–11. The abundances of platinum group elements (PGE) correlate with each other and with chalcophile elements such as Cu and Ni, and indicate a compatible behaviour during crystallization of the parental magma. Compared with the PGE-depleted central zones of differentiated flows (spinifex and clinopyroxene cumulate zones) the olivine cumulate zones at the base contain elevated PGE abundances up to 10 ng/g Pd and Pt. A similar pattern is displayed in intrusive bodies, such as the Kammikivi sill and the Pilgujärvi intrusion. The olivine cumulates at the base of these bodies contain massive and disseminated Ni–Cu-sulphides with up to 2 μg/g Pd and Pt, but the PGE concentrations in the overlying clinopyroxenites and gabbroic rocks are in many cases below the detection limits. The metal distribution observed in samples closely representing liquid compositions suggests that the parental magma became sulphide saturated during the emplacement and depleted in chalcophile and siderophile metals as a result of fractional segregation of sulphide liquids. Relative sulphide liquid–silicate melt partition coefficients decrease in the order of Ir > Rh > Os > Ru > Pt = Pd > Cu. R-factors (silicate-sulphide mass ratio) are high and of the order of 104–105, and they indicate the segregation of only small amounts of sulphide liquid in the parental ferropicritic magma. In differentiated flows and intrusions the sulphide liquids segregated and accumulated at the base of these bodies, but because of a low silicate–sulphide mass ratio the sulphide liquids had a low PGE tenor and Pt/Ir and Cu/Ir ratios similar to the parental silicate melts. During cooling the sulphide liquid crystallized 40–50% of monosulphide solid solution (mss) and the residual sulphide liquid became enriched in Cu, Pt and Pd and depleted in Ir, Os and Ru. The Cu-rich sulphide liquid locally assimilated components of the surrounding S-rich sediments as suggested by the radiogenic Os isotopic composition of some sulphide ores (γOs > 100). Most of the massive and breccia ores represent mixtures of mss and residual Cu-rich sulphide liquid whereas chalcopyrite-rich veins formed when the Cu-rich sulphide liquids were squeezed out into the surrounding sediments.</description><identifier>ISSN: 0022-3530</identifier><identifier>ISSN: 1460-2415</identifier><identifier>EISSN: 1460-2415</identifier><identifier>DOI: 10.1093/petrology/41.12.1721</identifier><language>eng</language><publisher>Oxford: Oxford University Press</publisher><subject>ferropicrite ; magmatic Ni–Cu sulphide deposits ; Pechenga ; platinum-group elements</subject><ispartof>Journal of petrology, 2000-12, Vol.41 (12), p.1721-1742</ispartof><rights>Copyright Oxford University Press(England) Dec 2000</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a400t-61f0d17fd4f8b4385c926de4a4a5fb5ac4efdf5c9c723ab35f812b8c91f26fe83</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27915,27916</link.rule.ids></links><search><creatorcontrib>BRÜGMANN, G. E.</creatorcontrib><creatorcontrib>HANSKI, E. J.</creatorcontrib><creatorcontrib>NALDRETT, A. J.</creatorcontrib><creatorcontrib>SMOLKIN, V. F.</creatorcontrib><title>Sulphide Segregation in Ferropicrites from the Pechenga Complex, Kola Peninsula, Russia</title><title>Journal of petrology</title><addtitle>J. Petrology</addtitle><description>The Palaeoproterozoic Ni–Cu sulphide deposits of the Pechenga Complex, Kola Peninsula, occur in the lower parts of ferropicritic intrusions emplaced into the phyllitic and tuffaceous sedimentary unit of the Pilgujärvi Zone. The intrusive rocks are comagmatic with extrusive ferropicrites of the overlying volcanic formation. Massive lavas and chilled margins from layered flows and intrusions contain <3–7 ng/g Pd and Pt and <0·02–2·0 ng/g Ir, Os and Ru with low Pd/Ir ratios of 5–11. The abundances of platinum group elements (PGE) correlate with each other and with chalcophile elements such as Cu and Ni, and indicate a compatible behaviour during crystallization of the parental magma. Compared with the PGE-depleted central zones of differentiated flows (spinifex and clinopyroxene cumulate zones) the olivine cumulate zones at the base contain elevated PGE abundances up to 10 ng/g Pd and Pt. A similar pattern is displayed in intrusive bodies, such as the Kammikivi sill and the Pilgujärvi intrusion. The olivine cumulates at the base of these bodies contain massive and disseminated Ni–Cu-sulphides with up to 2 μg/g Pd and Pt, but the PGE concentrations in the overlying clinopyroxenites and gabbroic rocks are in many cases below the detection limits. The metal distribution observed in samples closely representing liquid compositions suggests that the parental magma became sulphide saturated during the emplacement and depleted in chalcophile and siderophile metals as a result of fractional segregation of sulphide liquids. Relative sulphide liquid–silicate melt partition coefficients decrease in the order of Ir > Rh > Os > Ru > Pt = Pd > Cu. R-factors (silicate-sulphide mass ratio) are high and of the order of 104–105, and they indicate the segregation of only small amounts of sulphide liquid in the parental ferropicritic magma. In differentiated flows and intrusions the sulphide liquids segregated and accumulated at the base of these bodies, but because of a low silicate–sulphide mass ratio the sulphide liquids had a low PGE tenor and Pt/Ir and Cu/Ir ratios similar to the parental silicate melts. During cooling the sulphide liquid crystallized 40–50% of monosulphide solid solution (mss) and the residual sulphide liquid became enriched in Cu, Pt and Pd and depleted in Ir, Os and Ru. The Cu-rich sulphide liquid locally assimilated components of the surrounding S-rich sediments as suggested by the radiogenic Os isotopic composition of some sulphide ores (γOs > 100). Most of the massive and breccia ores represent mixtures of mss and residual Cu-rich sulphide liquid whereas chalcopyrite-rich veins formed when the Cu-rich sulphide liquids were squeezed out into the surrounding sediments.</description><subject>ferropicrite</subject><subject>magmatic Ni–Cu sulphide deposits</subject><subject>Pechenga</subject><subject>platinum-group elements</subject><issn>0022-3530</issn><issn>1460-2415</issn><issn>1460-2415</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNo9kEtLAzEUhYMoWKv_wEVw3am5Sea1lKJWKlisL9yEdOamTZ1OxmQG7L93SsXVhY_znQuHkEtgY2C5uG6w9a5yq921hDHwMaQcjsgAZMIiLiE-JgPGOI9ELNgpOQthwxj0nA3I-6KrmrUtkS5w5XGlW-tqamt6h967xhbethio8W5L2zXSORZrrFeaTty2qfBnRGeu0j2ubR26So_ocxeC1efkxOgq4MXfHZLXu9uXyTR6fLp_mNw8Rloy1kYJGFZCakppsqUUWVzkPClRaqljs4x1IdGUpqdFyoVeithkwJdZkYPhicFMDMnVobfx7rvD0KqN63zdv1Qc8ixP4yzpQ_IQKrwLwaNRjbdb7XcKmNovqP4XVBIUcLVfsNeig2ZDiz__jvZfKklFGqvpx6dib3I-E_O5YuIXf5B3ag</recordid><startdate>20001201</startdate><enddate>20001201</enddate><creator>BRÜGMANN, G. E.</creator><creator>HANSKI, E. J.</creator><creator>NALDRETT, A. J.</creator><creator>SMOLKIN, V. F.</creator><general>Oxford University Press</general><general>Oxford Publishing Limited (England)</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>JG9</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope></search><sort><creationdate>20001201</creationdate><title>Sulphide Segregation in Ferropicrites from the Pechenga Complex, Kola Peninsula, Russia</title><author>BRÜGMANN, G. E. ; HANSKI, E. J. ; NALDRETT, A. J. ; SMOLKIN, V. F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a400t-61f0d17fd4f8b4385c926de4a4a5fb5ac4efdf5c9c723ab35f812b8c91f26fe83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>ferropicrite</topic><topic>magmatic Ni–Cu sulphide deposits</topic><topic>Pechenga</topic><topic>platinum-group elements</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>BRÜGMANN, G. E.</creatorcontrib><creatorcontrib>HANSKI, E. J.</creatorcontrib><creatorcontrib>NALDRETT, A. J.</creatorcontrib><creatorcontrib>SMOLKIN, V. F.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of petrology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>BRÜGMANN, G. E.</au><au>HANSKI, E. J.</au><au>NALDRETT, A. J.</au><au>SMOLKIN, V. F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sulphide Segregation in Ferropicrites from the Pechenga Complex, Kola Peninsula, Russia</atitle><jtitle>Journal of petrology</jtitle><addtitle>J. Petrology</addtitle><date>2000-12-01</date><risdate>2000</risdate><volume>41</volume><issue>12</issue><spage>1721</spage><epage>1742</epage><pages>1721-1742</pages><issn>0022-3530</issn><issn>1460-2415</issn><eissn>1460-2415</eissn><abstract>The Palaeoproterozoic Ni–Cu sulphide deposits of the Pechenga Complex, Kola Peninsula, occur in the lower parts of ferropicritic intrusions emplaced into the phyllitic and tuffaceous sedimentary unit of the Pilgujärvi Zone. The intrusive rocks are comagmatic with extrusive ferropicrites of the overlying volcanic formation. Massive lavas and chilled margins from layered flows and intrusions contain <3–7 ng/g Pd and Pt and <0·02–2·0 ng/g Ir, Os and Ru with low Pd/Ir ratios of 5–11. The abundances of platinum group elements (PGE) correlate with each other and with chalcophile elements such as Cu and Ni, and indicate a compatible behaviour during crystallization of the parental magma. Compared with the PGE-depleted central zones of differentiated flows (spinifex and clinopyroxene cumulate zones) the olivine cumulate zones at the base contain elevated PGE abundances up to 10 ng/g Pd and Pt. A similar pattern is displayed in intrusive bodies, such as the Kammikivi sill and the Pilgujärvi intrusion. The olivine cumulates at the base of these bodies contain massive and disseminated Ni–Cu-sulphides with up to 2 μg/g Pd and Pt, but the PGE concentrations in the overlying clinopyroxenites and gabbroic rocks are in many cases below the detection limits. The metal distribution observed in samples closely representing liquid compositions suggests that the parental magma became sulphide saturated during the emplacement and depleted in chalcophile and siderophile metals as a result of fractional segregation of sulphide liquids. Relative sulphide liquid–silicate melt partition coefficients decrease in the order of Ir > Rh > Os > Ru > Pt = Pd > Cu. R-factors (silicate-sulphide mass ratio) are high and of the order of 104–105, and they indicate the segregation of only small amounts of sulphide liquid in the parental ferropicritic magma. In differentiated flows and intrusions the sulphide liquids segregated and accumulated at the base of these bodies, but because of a low silicate–sulphide mass ratio the sulphide liquids had a low PGE tenor and Pt/Ir and Cu/Ir ratios similar to the parental silicate melts. During cooling the sulphide liquid crystallized 40–50% of monosulphide solid solution (mss) and the residual sulphide liquid became enriched in Cu, Pt and Pd and depleted in Ir, Os and Ru. The Cu-rich sulphide liquid locally assimilated components of the surrounding S-rich sediments as suggested by the radiogenic Os isotopic composition of some sulphide ores (γOs > 100). Most of the massive and breccia ores represent mixtures of mss and residual Cu-rich sulphide liquid whereas chalcopyrite-rich veins formed when the Cu-rich sulphide liquids were squeezed out into the surrounding sediments.</abstract><cop>Oxford</cop><pub>Oxford University Press</pub><doi>10.1093/petrology/41.12.1721</doi><tpages>22</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0022-3530 |
| ispartof | Journal of petrology, 2000-12, Vol.41 (12), p.1721-1742 |
| issn | 0022-3530 1460-2415 1460-2415 |
| language | eng |
| recordid | cdi_proquest_journals_219897586 |
| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Oxford University Press Journals All Titles (1996-Current); Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | ferropicrite magmatic Ni–Cu sulphide deposits Pechenga platinum-group elements |
| title | Sulphide Segregation in Ferropicrites from the Pechenga Complex, Kola Peninsula, Russia |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-15T02%3A28%3A52IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Sulphide%20Segregation%20in%20Ferropicrites%20from%20the%20Pechenga%20Complex,%20Kola%20Peninsula,%20Russia&rft.jtitle=Journal%20of%20petrology&rft.au=BRU%CC%88GMANN,%20G.%20E.&rft.date=2000-12-01&rft.volume=41&rft.issue=12&rft.spage=1721&rft.epage=1742&rft.pages=1721-1742&rft.issn=0022-3530&rft.eissn=1460-2415&rft_id=info:doi/10.1093/petrology/41.12.1721&rft_dat=%3Cproquest_cross%3E374198971%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=219897586&rft_id=info:pmid/&rfr_iscdi=true |