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Evidence of gold related to Neoarchean alkaline magmatism in the Abitibi greenstone belt (Canada) from mineral parageneses and microscale trace element geochemistry on pyrite
Azevedo, Christophe1,2; Jebrak, Michel1; Genna, Dominique3,4; Pinti, Daniele L.1,5,6
2022-06-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume145Pages:21
AbstractMost of Archean gold deposits are classified as orogenic gold systems (OGS), precipitated by metamorphic fluids during compressional deformation at convergent plate margins. However, Neoarchean gold deposits are also found spatially related to post-collisional alkaline intrusions such as syenites, suggesting a genetic link between gold and magmas. To bring novel evidence on this relation, ore parageneses related to Bachelor/O'Brien, Beattie, Douay and Golden Arrow gold deposits were studied together with trace elements distribution at micron-scale in Au-bearing pyrites. Further, the delta S-34(pyrite) signature in the Beattie deposit were compared to epithermal Phan-erozoic analogues in post-collisional tectonic settings. Except for Golden Arrow, results show a paragenetic assemblage of K-feldspar-albite-anhydrite-barite-celestite-apatite-rutile-calcite-dolomite which is also common in Phanerozoic magmatic-hydrothermal systems. Gold-bearing pyrites are characterized by a higher abundance of most trace elements compared to OGS. Positive Au-Ag-Bi-Te-Tl-W-anomalies - which are not observed in OGS - suggest deposition from highly oxidized fluids, while Au precipitation in OGS is mainly controlled by reduced fluids. The presence of highly oxidized environments is also confirmed by very low delta S-34(pyrite) values ranging from -17.3 parts per thousand & nbsp; to-13.9 parts per thousand VCDT found at Beattie, in the range of those found in Phanerozoic deposits of Tuvatu and Emperor in Fiji. It is proposed that Archean gold related with late alkaline continental magmatism is deposited both at the top of porphyritic system and in epithermal environment, before the acme of deformation and metamorphism.
KeywordGold deposit Alkaline magmatism LA-ICP-MS Pyrite Abitibi greenstone belt
DOI10.1016/j.oregeorev.2022.104878
Funding OrganizationNatural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC)
WOS KeywordU-PB GEOCHRONOLOGY ; OROGENIC GOLD ; SUPERIOR-PROVINCE ; STABLE-ISOTOPE ; KIRKLAND LAKE ; LARDER LAKE ; PORPHYRY DEPOSITS ; IGNEOUS ROCKS ; CRIPPLE CREEK ; COPPER-GOLD
Language英语
Funding ProjectNatural Sciences and Engineering Research Council of Canada (NSERC)[RGPIN-2016-04866]
Funding OrganizationNatural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Natural Sciences and Engineering Research Council of Canada (NSERC)
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000799328700001
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106000
Collection兰州油气中心
Corresponding AuthorAzevedo, Christophe
Affiliation1.Univ Quebeca Montreal, CP succ Ctr ville 8888, Dept Sci Terre & atmosphere, CP 8888 succ. Centre-ville, Montreal, PQ H3C 3P8, Canada
2.Univ Quebeca Montreal, Res Ctr dynam Earth Syst, GEOTOP, Montreal, PQ H3C 3P8, Canada
3.Univ Quebeca Chicoutimi, Ctr Etud ressources minerales, 555, boul de Univ, Saguenay, PQ G7H 2B1, Canada
4.CONSOREM, 555,boul. de Univ, Saguenay, PQ G7H 2B1, Canada
5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
6.Gansu Talent & Intelligence Ctr Remediat Closed &, Lanzhou 730000, Peoples R China
Recommended Citation
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Azevedo, Christophe,Jebrak, Michel,Genna, Dominique,et al. Evidence of gold related to Neoarchean alkaline magmatism in the Abitibi greenstone belt (Canada) from mineral parageneses and microscale trace element geochemistry on pyrite[J]. ORE GEOLOGY REVIEWS,2022,145:21.
APA Azevedo, Christophe,Jebrak, Michel,Genna, Dominique,&Pinti, Daniele L..(2022).Evidence of gold related to Neoarchean alkaline magmatism in the Abitibi greenstone belt (Canada) from mineral parageneses and microscale trace element geochemistry on pyrite.ORE GEOLOGY REVIEWS,145,21.
MLA Azevedo, Christophe,et al."Evidence of gold related to Neoarchean alkaline magmatism in the Abitibi greenstone belt (Canada) from mineral parageneses and microscale trace element geochemistry on pyrite".ORE GEOLOGY REVIEWS 145(2022):21.
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