Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada
Bitumen is a common associate of carbonate-hosted lead-zinc deposits. On the Pine Point lead-zinc property, Northwest Territories, Canada, there are two forms of bitumen. Unaltered bitumens have atomic hydrogen/carbon ratios of about 1.4, sulfur contents of about 7.8 percent, and sulfur isotope rati...
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American Association for the Advancement of Science (AAAS)
1984
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craaas:10.1126/science.224.4644.63 2024-06-09T07:48:40+00:00 Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada Powell, Trevor G. MacQueen, Roger W. 1984 http://dx.doi.org/10.1126/science.224.4644.63 https://www.science.org/doi/pdf/10.1126/science.224.4644.63 en eng American Association for the Advancement of Science (AAAS) Science volume 224, issue 4644, page 63-66 ISSN 0036-8075 1095-9203 journal-article 1984 craaas https://doi.org/10.1126/science.224.4644.63 2024-05-16T12:55:56Z Bitumen is a common associate of carbonate-hosted lead-zinc deposits. On the Pine Point lead-zinc property, Northwest Territories, Canada, there are two forms of bitumen. Unaltered bitumens have atomic hydrogen/carbon ratios of about 1.4, sulfur contents of about 7.8 percent, and sulfur isotope ratios (δ 34 S) of approximately +4.6 per mil. Altered bitumens occur in proximity to sulfide ore bodies and white sparry dolomite. Their hydrogen/carbon ratios are about 1.02, the sulfur contents average 22 percent, and the δ 34 S values are about +12.4 per mil. These data indicate that some bitumen has participated in the thermochemical reduction of sulfate to produce hydrogen sulfide required to precipitate the ores. Mass balance considerations show that the amount and degree of alteration of bitumen is more than adequate to account for the reduced sulfur species (lead, zinc, and iron sulfides) deposited at Pine Point. These reactions may provide an important means of generating the large volumes of sulfide necessary to precipitate ore bodies in carbonate rocks. Article in Journal/Newspaper Northwest Territories AAAS Resource Center (American Association for the Advancement of Science) Canada Northwest Territories Pine Point ENVELOPE(-114.449,-114.449,60.834,60.834) Science 224 4644 63 66 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Bitumen is a common associate of carbonate-hosted lead-zinc deposits. On the Pine Point lead-zinc property, Northwest Territories, Canada, there are two forms of bitumen. Unaltered bitumens have atomic hydrogen/carbon ratios of about 1.4, sulfur contents of about 7.8 percent, and sulfur isotope ratios (δ 34 S) of approximately +4.6 per mil. Altered bitumens occur in proximity to sulfide ore bodies and white sparry dolomite. Their hydrogen/carbon ratios are about 1.02, the sulfur contents average 22 percent, and the δ 34 S values are about +12.4 per mil. These data indicate that some bitumen has participated in the thermochemical reduction of sulfate to produce hydrogen sulfide required to precipitate the ores. Mass balance considerations show that the amount and degree of alteration of bitumen is more than adequate to account for the reduced sulfur species (lead, zinc, and iron sulfides) deposited at Pine Point. These reactions may provide an important means of generating the large volumes of sulfide necessary to precipitate ore bodies in carbonate rocks. |
format |
Article in Journal/Newspaper |
author |
Powell, Trevor G. MacQueen, Roger W. |
spellingShingle |
Powell, Trevor G. MacQueen, Roger W. Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada |
author_facet |
Powell, Trevor G. MacQueen, Roger W. |
author_sort |
Powell, Trevor G. |
title |
Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada |
title_short |
Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada |
title_full |
Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada |
title_fullStr |
Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada |
title_full_unstemmed |
Precipitation of Sulfide Ores and Organic Matter: Sulfate Reactions at Pine Point, Canada |
title_sort |
precipitation of sulfide ores and organic matter: sulfate reactions at pine point, canada |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1984 |
url |
http://dx.doi.org/10.1126/science.224.4644.63 https://www.science.org/doi/pdf/10.1126/science.224.4644.63 |
long_lat |
ENVELOPE(-114.449,-114.449,60.834,60.834) |
geographic |
Canada Northwest Territories Pine Point |
geographic_facet |
Canada Northwest Territories Pine Point |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_source |
Science volume 224, issue 4644, page 63-66 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.224.4644.63 |
container_title |
Science |
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224 |
container_issue |
4644 |
container_start_page |
63 |
op_container_end_page |
66 |
_version_ |
1801380480375848960 |