Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis
Proton-induced X-ray emission (PIXE) has been used to characterize the multielement chemistry of the diverse fluid inclusions found in intrusion-related gold systems in the Tintina gold province, Yukon and Alaska. The studied samples are from shallow-level examples that contain coexisting brine (typ...
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ftjamescook:oai:researchonline.jcu.edu.au:4158 2024-02-11T10:05:35+01:00 Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis Baker, T. Ebert, S. Rombach, C. Ryan, C.G. 2006-03-01 application/pdf https://researchonline.jcu.edu.au/4158/1/4158_Baker_et_al.2006.pdf unknown Society of Economic Geologists http://dx.doi.org/10.2113/gsecongeo.101.2.311 https://researchonline.jcu.edu.au/4158/ https://researchonline.jcu.edu.au/4158/1/4158_Baker_et_al.2006.pdf Baker, T., Ebert, S., Rombach, C., and Ryan, C.G. (2006) Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis. Economic Geology, 101 (2). pp. 311-327. restricted Article PeerReviewed 2006 ftjamescook https://doi.org/10.2113/gsecongeo.101.2.311 2024-01-22T23:22:20Z Proton-induced X-ray emission (PIXE) has been used to characterize the multielement chemistry of the diverse fluid inclusions found in intrusion-related gold systems in the Tintina gold province, Yukon and Alaska. The studied samples are from shallow-level examples that contain coexisting brine (type 3) and carbon dioxide-bearing vapor (type 4) inclusions (e.g., Shotgun, Donlin Creek Dome area, Mike Lake, and Brewery Creek) and deeper level deposits (e.g., Pogo, Dublin Gulch, and Emerald Lake) that contain low-salinity carbon dioxide- (type 1) and/or methane-rich (type 5) inclusions, which locally are overprinted by late secondary type 3 inclusions (e.g., Pogo and Emerald Lake). Major element ratios, K/Ca and Mn/Fe, of both synore high-salinity (type 3) and low-salinity (types 1, 4, and 5) inclusions are >1 and <0.24, respectively. The latter is consistent with the reduced conditions in which intrusion-related gold systems form. Late, secondary type 3 inclusions at Emerald Lake and Pogo, however, are chemically distinct, with higher Mn/Fe ratios (>0.24), and at Pogo low K/Ca ratios (<0.2). Chlorine and bromine data have been used to trace the source of salinity. Two distinct groups of Br/Cl mol ratio are recognized. Group 1 includes type 3 inclusions from the Pogo region, Mike Lake, Brewery Creek, and Emerald Lake, which have Br/Cl mol ratios consistent with typical magmatic values, mostly above 0.5 x 10–3 and below 1.54 x 10–3 (seawater). Group 2 comprises type 3 inclusions from Donlin Creek and Shotgun in southwestern Alaska, which have Br/Cl mol ratios from 2.34 x 10–3 to 6.37 x 10–3, potentially reflecting a halogen contribution from the local sedimentary crust (the Kuskokwim basin) considered to be the primary source of the granite melts. The data also provide insights into important metal contents of the fluid inclusions, including copper, zinc, lead, tungsten, and arsenic; however, gold, bismuth and antimony were all below the detection limits for these elements by the PIXE technique. The ... Article in Journal/Newspaper Kuskokwim Alaska Yukon James Cook University, Australia: ResearchOnline@JCU Dublin Gulch ENVELOPE(-135.804,-135.804,64.043,64.043) Gulch ENVELOPE(-61.483,-61.483,-63.997,-63.997) Yukon Economic Geology 101 2 311 327 |
institution |
Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
Proton-induced X-ray emission (PIXE) has been used to characterize the multielement chemistry of the diverse fluid inclusions found in intrusion-related gold systems in the Tintina gold province, Yukon and Alaska. The studied samples are from shallow-level examples that contain coexisting brine (type 3) and carbon dioxide-bearing vapor (type 4) inclusions (e.g., Shotgun, Donlin Creek Dome area, Mike Lake, and Brewery Creek) and deeper level deposits (e.g., Pogo, Dublin Gulch, and Emerald Lake) that contain low-salinity carbon dioxide- (type 1) and/or methane-rich (type 5) inclusions, which locally are overprinted by late secondary type 3 inclusions (e.g., Pogo and Emerald Lake). Major element ratios, K/Ca and Mn/Fe, of both synore high-salinity (type 3) and low-salinity (types 1, 4, and 5) inclusions are >1 and <0.24, respectively. The latter is consistent with the reduced conditions in which intrusion-related gold systems form. Late, secondary type 3 inclusions at Emerald Lake and Pogo, however, are chemically distinct, with higher Mn/Fe ratios (>0.24), and at Pogo low K/Ca ratios (<0.2). Chlorine and bromine data have been used to trace the source of salinity. Two distinct groups of Br/Cl mol ratio are recognized. Group 1 includes type 3 inclusions from the Pogo region, Mike Lake, Brewery Creek, and Emerald Lake, which have Br/Cl mol ratios consistent with typical magmatic values, mostly above 0.5 x 10–3 and below 1.54 x 10–3 (seawater). Group 2 comprises type 3 inclusions from Donlin Creek and Shotgun in southwestern Alaska, which have Br/Cl mol ratios from 2.34 x 10–3 to 6.37 x 10–3, potentially reflecting a halogen contribution from the local sedimentary crust (the Kuskokwim basin) considered to be the primary source of the granite melts. The data also provide insights into important metal contents of the fluid inclusions, including copper, zinc, lead, tungsten, and arsenic; however, gold, bismuth and antimony were all below the detection limits for these elements by the PIXE technique. The ... |
format |
Article in Journal/Newspaper |
author |
Baker, T. Ebert, S. Rombach, C. Ryan, C.G. |
spellingShingle |
Baker, T. Ebert, S. Rombach, C. Ryan, C.G. Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis |
author_facet |
Baker, T. Ebert, S. Rombach, C. Ryan, C.G. |
author_sort |
Baker, T. |
title |
Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis |
title_short |
Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis |
title_full |
Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis |
title_fullStr |
Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis |
title_full_unstemmed |
Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis |
title_sort |
chemical compositions of fluid inclusions in intrusion related gold deposits, alaska and yukon, using pixe microanalysis |
publisher |
Society of Economic Geologists |
publishDate |
2006 |
url |
https://researchonline.jcu.edu.au/4158/1/4158_Baker_et_al.2006.pdf |
long_lat |
ENVELOPE(-135.804,-135.804,64.043,64.043) ENVELOPE(-61.483,-61.483,-63.997,-63.997) |
geographic |
Dublin Gulch Gulch Yukon |
geographic_facet |
Dublin Gulch Gulch Yukon |
genre |
Kuskokwim Alaska Yukon |
genre_facet |
Kuskokwim Alaska Yukon |
op_relation |
http://dx.doi.org/10.2113/gsecongeo.101.2.311 https://researchonline.jcu.edu.au/4158/ https://researchonline.jcu.edu.au/4158/1/4158_Baker_et_al.2006.pdf Baker, T., Ebert, S., Rombach, C., and Ryan, C.G. (2006) Chemical compositions of fluid inclusions in intrusion related gold deposits, Alaska and Yukon, using PIXE microanalysis. Economic Geology, 101 (2). pp. 311-327. |
op_rights |
restricted |
op_doi |
https://doi.org/10.2113/gsecongeo.101.2.311 |
container_title |
Economic Geology |
container_volume |
101 |
container_issue |
2 |
container_start_page |
311 |
op_container_end_page |
327 |
_version_ |
1790602670430486528 |