Sulfur isotopic systematics of granitoids from southwestern New Brunswick, Canada: implications for magmatic-hydrothermal processes, redox conditions, and gold mineralization
Bulk δ 34 S rock values, sulfur contents, and magnetic susceptibility were determined for 12 gold-related granitoid intrusions in southwestern New Brunswick, the Canadian Appalachians. The sulfur isotope compositions of sulfide minerals in some of the granitoid samples were also analyzed. This new d...
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| Veröffentlicht in: | Mineralium deposita 2010-12, Vol.45 (8), p.795-816 |
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| creator | Yang, Xue-Ming Lentz, David R. |
| description | Bulk
δ
34
S
rock
values, sulfur contents, and magnetic susceptibility were determined for 12 gold-related granitoid intrusions in southwestern New Brunswick, the Canadian Appalachians. The sulfur isotope compositions of sulfide minerals in some of the granitoid samples were also analyzed. This new dataset was used to characterize two distinctive groups of granitoids: (1) a Late Devonian granitic series (GS) and (2) a Late Silurian to Early Devonian granodioritic to monzogranitic series (GMS). The GS rocks have a large range in
δ
34
S values of −7.1‰ to +13‰ with an average of 2.2 ± 5.0‰ (1σ), low bulk-S contents (33 to 7,710 ppm) and low magnetic susceptibility values (10
−3
SI), indicative of oxidized magnetite-series granites. The exceptions for the GMS rocks are the Lake George granodiorite and Tower Hill granite that display reduced characteristics, which may have resulted from interaction of the magmas forming these intrusions with graphite- or organic carbon-bearing sedimentary rocks. The bulk
δ
34
S values and S contents of the GMS rocks are interpreted in terms of selective assimilation–fractional crystallization (SAFC) processes. Degassing processes may account for the
δ
34
S values and S contents of some GS rocks. The characteristics of our sulfur isotope and abundance data suggest that mineralizing components S and Au in intrusion-related gold systems are dominantly derived from magmatic sources, although minor contaminants derived from country rocks are evident. In addition, the molar sulfate to sulfide ratio in a granitic rock sample can be calculated from the
δ
34
S
rock
value of the whole-rock sample and the
δ
34
S
sulfide
(or
δ
34
S
sulfate
) value of sulfide and/or sulfate mineral in the sample on the basis of S-isotope fractionation and mass balance under the condition of magmatic equilibrium. This may be used to predict the speciation of sulfur in granitic rocks, which can be a potential exploration tool for intrusion-related gold systems. |
| doi_str_mv | 10.1007/s00126-010-0307-6 |
| format | Article |
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δ
34
S
rock
values, sulfur contents, and magnetic susceptibility were determined for 12 gold-related granitoid intrusions in southwestern New Brunswick, the Canadian Appalachians. The sulfur isotope compositions of sulfide minerals in some of the granitoid samples were also analyzed. This new dataset was used to characterize two distinctive groups of granitoids: (1) a Late Devonian granitic series (GS) and (2) a Late Silurian to Early Devonian granodioritic to monzogranitic series (GMS). The GS rocks have a large range in
δ
34
S values of −7.1‰ to +13‰ with an average of 2.2 ± 5.0‰ (1σ), low bulk-S contents (33 to 7,710 ppm) and low magnetic susceptibility values (<10
−4
SI), consistent with reduced ilmenite-series granites. The GMS rocks have a relatively narrower variation in
δ
34
S values of −4.4‰ to +7.3‰ with an average 1.2 ± 2.9‰ but with larger ranges in bulk-S contents (45 to 11,100 ppm) and high magnetic susceptibility values (>10
−3
SI), indicative of oxidized magnetite-series granites. The exceptions for the GMS rocks are the Lake George granodiorite and Tower Hill granite that display reduced characteristics, which may have resulted from interaction of the magmas forming these intrusions with graphite- or organic carbon-bearing sedimentary rocks. The bulk
δ
34
S values and S contents of the GMS rocks are interpreted in terms of selective assimilation–fractional crystallization (SAFC) processes. Degassing processes may account for the
δ
34
S values and S contents of some GS rocks. The characteristics of our sulfur isotope and abundance data suggest that mineralizing components S and Au in intrusion-related gold systems are dominantly derived from magmatic sources, although minor contaminants derived from country rocks are evident. In addition, the molar sulfate to sulfide ratio in a granitic rock sample can be calculated from the
δ
34
S
rock
value of the whole-rock sample and the
δ
34
S
sulfide
(or
δ
34
S
sulfate
) value of sulfide and/or sulfate mineral in the sample on the basis of S-isotope fractionation and mass balance under the condition of magmatic equilibrium. This may be used to predict the speciation of sulfur in granitic rocks, which can be a potential exploration tool for intrusion-related gold systems.</description><identifier>ISSN: 0026-4598</identifier><identifier>EISSN: 1432-1866</identifier><identifier>DOI: 10.1007/s00126-010-0307-6</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer-Verlag</publisher><subject>Contaminants ; Crystallization ; Degassing ; Devonian ; Earth and Environmental Science ; Earth Sciences ; Fractionation ; Geology ; Gold ; Granite ; Isotope fractionation ; Magma ; Mineral Resources ; Mineralization ; Mineralogy ; Organic carbon ; Sedimentary rocks ; Silurian ; Speciation ; Sulfates ; Sulfides ; Sulfur ; Systematics</subject><ispartof>Mineralium deposita, 2010-12, Vol.45 (8), p.795-816</ispartof><rights>Springer-Verlag 2010</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a338t-4337cd44e9c481b35e04baa4d1ac93b53846c27bf4b4535a3449ce188eb5658f3</citedby><cites>FETCH-LOGICAL-a338t-4337cd44e9c481b35e04baa4d1ac93b53846c27bf4b4535a3449ce188eb5658f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00126-010-0307-6$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00126-010-0307-6$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Yang, Xue-Ming</creatorcontrib><creatorcontrib>Lentz, David R.</creatorcontrib><title>Sulfur isotopic systematics of granitoids from southwestern New Brunswick, Canada: implications for magmatic-hydrothermal processes, redox conditions, and gold mineralization</title><title>Mineralium deposita</title><addtitle>Miner Deposita</addtitle><description>Bulk
δ
34
S
rock
values, sulfur contents, and magnetic susceptibility were determined for 12 gold-related granitoid intrusions in southwestern New Brunswick, the Canadian Appalachians. The sulfur isotope compositions of sulfide minerals in some of the granitoid samples were also analyzed. This new dataset was used to characterize two distinctive groups of granitoids: (1) a Late Devonian granitic series (GS) and (2) a Late Silurian to Early Devonian granodioritic to monzogranitic series (GMS). The GS rocks have a large range in
δ
34
S values of −7.1‰ to +13‰ with an average of 2.2 ± 5.0‰ (1σ), low bulk-S contents (33 to 7,710 ppm) and low magnetic susceptibility values (<10
−4
SI), consistent with reduced ilmenite-series granites. The GMS rocks have a relatively narrower variation in
δ
34
S values of −4.4‰ to +7.3‰ with an average 1.2 ± 2.9‰ but with larger ranges in bulk-S contents (45 to 11,100 ppm) and high magnetic susceptibility values (>10
−3
SI), indicative of oxidized magnetite-series granites. The exceptions for the GMS rocks are the Lake George granodiorite and Tower Hill granite that display reduced characteristics, which may have resulted from interaction of the magmas forming these intrusions with graphite- or organic carbon-bearing sedimentary rocks. The bulk
δ
34
S values and S contents of the GMS rocks are interpreted in terms of selective assimilation–fractional crystallization (SAFC) processes. Degassing processes may account for the
δ
34
S values and S contents of some GS rocks. The characteristics of our sulfur isotope and abundance data suggest that mineralizing components S and Au in intrusion-related gold systems are dominantly derived from magmatic sources, although minor contaminants derived from country rocks are evident. In addition, the molar sulfate to sulfide ratio in a granitic rock sample can be calculated from the
δ
34
S
rock
value of the whole-rock sample and the
δ
34
S
sulfide
(or
δ
34
S
sulfate
) value of sulfide and/or sulfate mineral in the sample on the basis of S-isotope fractionation and mass balance under the condition of magmatic equilibrium. This may be used to predict the speciation of sulfur in granitic rocks, which can be a potential exploration tool for intrusion-related gold systems.</description><subject>Contaminants</subject><subject>Crystallization</subject><subject>Degassing</subject><subject>Devonian</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Fractionation</subject><subject>Geology</subject><subject>Gold</subject><subject>Granite</subject><subject>Isotope fractionation</subject><subject>Magma</subject><subject>Mineral Resources</subject><subject>Mineralization</subject><subject>Mineralogy</subject><subject>Organic carbon</subject><subject>Sedimentary rocks</subject><subject>Silurian</subject><subject>Speciation</subject><subject>Sulfates</subject><subject>Sulfides</subject><subject>Sulfur</subject><subject>Systematics</subject><issn>0026-4598</issn><issn>1432-1866</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kcFu1DAQhi0EEkvLA3Abcd7QcWwnDjdYFYpU0QPt2XJsZ9clsRc70bI8FM-Iu4vEiZMP83_fePQT8obiO4rYXmVEWjcVUqyQYVs1z8iKclZXVDbNc7JCLFMuOvmSvMr5ERE7ynFFfn9bxmFJ4HOc494byMc8u0nP3mSIA2yTDn6O3mYYUpwgx2XeHVzJpABf3QE-piXkgzff17DRQVv9Hvy0H70pihgKFRNMensyVrujTXHeuTTpEfYpGpezy2tIzsafYGKw_kStQQcL2zhamHxwSY_-18l3SV4Meszu9d_3gjx8ur7f3FS3d5-_bD7cVpoxOVecsdZYzl1nuKQ9Ew55rzW3VJuO9YJJ3pi67Qfec8GEZpx3xlEpXS8aIQd2Qd6eveWTP5ZyrnqMSwplpZLYihZrFCVEzyGTYs7JDWqf_KTTUVFUT62ocyuqtKKeWlFNYeozk0s2bF36J_4_9AdZ55ST</recordid><startdate>20101201</startdate><enddate>20101201</enddate><creator>Yang, Xue-Ming</creator><creator>Lentz, David R.</creator><general>Springer-Verlag</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7XB</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</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>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>20101201</creationdate><title>Sulfur isotopic systematics of granitoids from southwestern New Brunswick, Canada: implications for magmatic-hydrothermal processes, redox conditions, and gold mineralization</title><author>Yang, Xue-Ming ; Lentz, David R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a338t-4337cd44e9c481b35e04baa4d1ac93b53846c27bf4b4535a3449ce188eb5658f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Contaminants</topic><topic>Crystallization</topic><topic>Degassing</topic><topic>Devonian</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Fractionation</topic><topic>Geology</topic><topic>Gold</topic><topic>Granite</topic><topic>Isotope fractionation</topic><topic>Magma</topic><topic>Mineral Resources</topic><topic>Mineralization</topic><topic>Mineralogy</topic><topic>Organic carbon</topic><topic>Sedimentary rocks</topic><topic>Silurian</topic><topic>Speciation</topic><topic>Sulfates</topic><topic>Sulfides</topic><topic>Sulfur</topic><topic>Systematics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yang, Xue-Ming</creatorcontrib><creatorcontrib>Lentz, David R.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Science Database</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><jtitle>Mineralium deposita</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yang, Xue-Ming</au><au>Lentz, David R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sulfur isotopic systematics of granitoids from southwestern New Brunswick, Canada: implications for magmatic-hydrothermal processes, redox conditions, and gold mineralization</atitle><jtitle>Mineralium deposita</jtitle><stitle>Miner Deposita</stitle><date>2010-12-01</date><risdate>2010</risdate><volume>45</volume><issue>8</issue><spage>795</spage><epage>816</epage><pages>795-816</pages><issn>0026-4598</issn><eissn>1432-1866</eissn><abstract>Bulk
δ
34
S
rock
values, sulfur contents, and magnetic susceptibility were determined for 12 gold-related granitoid intrusions in southwestern New Brunswick, the Canadian Appalachians. The sulfur isotope compositions of sulfide minerals in some of the granitoid samples were also analyzed. This new dataset was used to characterize two distinctive groups of granitoids: (1) a Late Devonian granitic series (GS) and (2) a Late Silurian to Early Devonian granodioritic to monzogranitic series (GMS). The GS rocks have a large range in
δ
34
S values of −7.1‰ to +13‰ with an average of 2.2 ± 5.0‰ (1σ), low bulk-S contents (33 to 7,710 ppm) and low magnetic susceptibility values (<10
−4
SI), consistent with reduced ilmenite-series granites. The GMS rocks have a relatively narrower variation in
δ
34
S values of −4.4‰ to +7.3‰ with an average 1.2 ± 2.9‰ but with larger ranges in bulk-S contents (45 to 11,100 ppm) and high magnetic susceptibility values (>10
−3
SI), indicative of oxidized magnetite-series granites. The exceptions for the GMS rocks are the Lake George granodiorite and Tower Hill granite that display reduced characteristics, which may have resulted from interaction of the magmas forming these intrusions with graphite- or organic carbon-bearing sedimentary rocks. The bulk
δ
34
S values and S contents of the GMS rocks are interpreted in terms of selective assimilation–fractional crystallization (SAFC) processes. Degassing processes may account for the
δ
34
S values and S contents of some GS rocks. The characteristics of our sulfur isotope and abundance data suggest that mineralizing components S and Au in intrusion-related gold systems are dominantly derived from magmatic sources, although minor contaminants derived from country rocks are evident. In addition, the molar sulfate to sulfide ratio in a granitic rock sample can be calculated from the
δ
34
S
rock
value of the whole-rock sample and the
δ
34
S
sulfide
(or
δ
34
S
sulfate
) value of sulfide and/or sulfate mineral in the sample on the basis of S-isotope fractionation and mass balance under the condition of magmatic equilibrium. This may be used to predict the speciation of sulfur in granitic rocks, which can be a potential exploration tool for intrusion-related gold systems.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><doi>10.1007/s00126-010-0307-6</doi><tpages>22</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0026-4598 |
| ispartof | Mineralium deposita, 2010-12, Vol.45 (8), p.795-816 |
| issn | 0026-4598 1432-1866 |
| language | eng |
| recordid | cdi_proquest_journals_807570205 |
| source | Springer Nature - Complete Springer Journals |
| subjects | Contaminants Crystallization Degassing Devonian Earth and Environmental Science Earth Sciences Fractionation Geology Gold Granite Isotope fractionation Magma Mineral Resources Mineralization Mineralogy Organic carbon Sedimentary rocks Silurian Speciation Sulfates Sulfides Sulfur Systematics |
| title | Sulfur isotopic systematics of granitoids from southwestern New Brunswick, Canada: implications for magmatic-hydrothermal processes, redox conditions, and gold mineralization |
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