Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada
Lead- and sulfur-isotope ratios have been determined for some galenas and iron sulfides from two regions around Yellowknife, Northwest Territories. For the ore deposits, sulfur-isotope ratios are close to the meteoritic value or slightly positive. Lead-isotope ratios fall into two groups, one derive...
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crcansciencepubl:10.1139/e68-125 2023-12-17T10:30:38+01:00 Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada Robertson, D. K. Cumming, G. L. 1968 http://dx.doi.org/10.1139/e68-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/e68-125 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 5, issue 5, page 1269-1276 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1968 crcansciencepubl https://doi.org/10.1139/e68-125 2023-11-19T13:39:35Z Lead- and sulfur-isotope ratios have been determined for some galenas and iron sulfides from two regions around Yellowknife, Northwest Territories. For the ore deposits, sulfur-isotope ratios are close to the meteoritic value or slightly positive. Lead-isotope ratios fall into two groups, one derived from a source with Th/U = 4.3 and μ = 9–11, and the other from a source with Th/U = 3.5 and μ = 9.0. The ratios fall on an anomalous lead line, which indicates one event of great antiquity (approximately 4000 m.y.), and another about 2800 m.y. ago.Other sulfide samples from areas around Great Slave Lake, primarily outside the ancient (2800 m.y.) Slave Province, indicate events at 2800 m.y. and 1550 m.y., the latter date probably representing the time of the last major tectonic event in the Slave Province. Sulfur-isotope ratios for these samples vary from +1‰ to −13‰ relative to the meteoritic value, suggesting that these leads may have been remobilized by thermal metamorphism, and recombined with crustal sulfur enriched in 32 S. Article in Journal/Newspaper Great Slave Lake Northwest Territories Yellowknife Canadian Science Publishing (via Crossref) Northwest Territories Yellowknife Canada Great Slave Lake ENVELOPE(-114.001,-114.001,61.500,61.500) Canadian Journal of Earth Sciences 5 5 1269 1276 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Robertson, D. K. Cumming, G. L. Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Lead- and sulfur-isotope ratios have been determined for some galenas and iron sulfides from two regions around Yellowknife, Northwest Territories. For the ore deposits, sulfur-isotope ratios are close to the meteoritic value or slightly positive. Lead-isotope ratios fall into two groups, one derived from a source with Th/U = 4.3 and μ = 9–11, and the other from a source with Th/U = 3.5 and μ = 9.0. The ratios fall on an anomalous lead line, which indicates one event of great antiquity (approximately 4000 m.y.), and another about 2800 m.y. ago.Other sulfide samples from areas around Great Slave Lake, primarily outside the ancient (2800 m.y.) Slave Province, indicate events at 2800 m.y. and 1550 m.y., the latter date probably representing the time of the last major tectonic event in the Slave Province. Sulfur-isotope ratios for these samples vary from +1‰ to −13‰ relative to the meteoritic value, suggesting that these leads may have been remobilized by thermal metamorphism, and recombined with crustal sulfur enriched in 32 S. |
format |
Article in Journal/Newspaper |
author |
Robertson, D. K. Cumming, G. L. |
author_facet |
Robertson, D. K. Cumming, G. L. |
author_sort |
Robertson, D. K. |
title |
Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada |
title_short |
Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada |
title_full |
Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada |
title_fullStr |
Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada |
title_full_unstemmed |
Lead- and sulfur-isotope ratios from the Great Slave Lake area, Canada |
title_sort |
lead- and sulfur-isotope ratios from the great slave lake area, canada |
publisher |
Canadian Science Publishing |
publishDate |
1968 |
url |
http://dx.doi.org/10.1139/e68-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/e68-125 |
long_lat |
ENVELOPE(-114.001,-114.001,61.500,61.500) |
geographic |
Northwest Territories Yellowknife Canada Great Slave Lake |
geographic_facet |
Northwest Territories Yellowknife Canada Great Slave Lake |
genre |
Great Slave Lake Northwest Territories Yellowknife |
genre_facet |
Great Slave Lake Northwest Territories Yellowknife |
op_source |
Canadian Journal of Earth Sciences volume 5, issue 5, page 1269-1276 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e68-125 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
5 |
container_issue |
5 |
container_start_page |
1269 |
op_container_end_page |
1276 |
_version_ |
1785583629386121216 |