The behaviour of metals in deep fluids of NE Iceland
Abstract In this contribution, we present some of the first data on the elemental signature of deep crustal fluids in a basalt-hosted, low-chloride magmatic-hydrothermal system. Down-hole fluid samples (850–1600 m) from wells in the Theistareykir and Krafla geothermal fields in the Northern Volcanic...
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ftdoajarticles:oai:doaj.org/article:ae4dbe6223dc4efc89f36e7177e51a5b 2023-05-15T16:46:44+02:00 The behaviour of metals in deep fluids of NE Iceland Marion Saby Vincent van Hinsberg Daniele L. Pinti Kim Berlo Bjarni Gautason Ásgerður Sigurðardóttir Kevin Brown Océane Rocher 2022-12-01T00:00:00Z https://doi.org/10.1038/s41598-022-26028-x https://doaj.org/article/ae4dbe6223dc4efc89f36e7177e51a5b EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-26028-x https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-26028-x 2045-2322 https://doaj.org/article/ae4dbe6223dc4efc89f36e7177e51a5b Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-26028-x 2022-12-30T19:28:14Z Abstract In this contribution, we present some of the first data on the elemental signature of deep crustal fluids in a basalt-hosted, low-chloride magmatic-hydrothermal system. Down-hole fluid samples (850–1600 m) from wells in the Theistareykir and Krafla geothermal fields in the Northern Volcanic Zone of Iceland were combined with well-head samples of condensed vapor, cuttings of altered rock, and fresh basalt (being some of the first concentration data for volatile and semi-volatile elements (Sb, Tl, Bi, Cd and As) for this area of Iceland). Results show that the deep fluids are relatively enriched in base metals and (semi)-volatile metals (in particular Te, Hg, Re and Tl) compared to local basalt. We interpret this enrichment in volatile metals to reflect a significant element input from magma degassing. Boiling of this deep fluid results in a well-head fluid composition that is significantly depleted in most elements. This well-head fluid has a distinct elemental signature, including a depletion in Sb that is mirrored in the altered rocks, and a depletion in the base metals that shows their selective sequestration in scale minerals, likely sulphides. As expected, the element content and patterns in surface fluids can thus not be interpreted to directly reflect that of the deep reservoir fluid. The behaviour of elements in Theistareykir and Krafla fluids is consistent, and largely agrees with similar data obtained for the Reykjanes geothermal system in SW Iceland. We therefore posit that our results are representative for this geological setting and indicate a significant magmatic degassing cation input to deep fluids, variably modified by water–rock interaction. Article in Journal/Newspaper Iceland Directory of Open Access Journals: DOAJ Articles Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Scientific Reports 12 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q Marion Saby Vincent van Hinsberg Daniele L. Pinti Kim Berlo Bjarni Gautason Ásgerður Sigurðardóttir Kevin Brown Océane Rocher The behaviour of metals in deep fluids of NE Iceland |
topic_facet |
Medicine R Science Q |
description |
Abstract In this contribution, we present some of the first data on the elemental signature of deep crustal fluids in a basalt-hosted, low-chloride magmatic-hydrothermal system. Down-hole fluid samples (850–1600 m) from wells in the Theistareykir and Krafla geothermal fields in the Northern Volcanic Zone of Iceland were combined with well-head samples of condensed vapor, cuttings of altered rock, and fresh basalt (being some of the first concentration data for volatile and semi-volatile elements (Sb, Tl, Bi, Cd and As) for this area of Iceland). Results show that the deep fluids are relatively enriched in base metals and (semi)-volatile metals (in particular Te, Hg, Re and Tl) compared to local basalt. We interpret this enrichment in volatile metals to reflect a significant element input from magma degassing. Boiling of this deep fluid results in a well-head fluid composition that is significantly depleted in most elements. This well-head fluid has a distinct elemental signature, including a depletion in Sb that is mirrored in the altered rocks, and a depletion in the base metals that shows their selective sequestration in scale minerals, likely sulphides. As expected, the element content and patterns in surface fluids can thus not be interpreted to directly reflect that of the deep reservoir fluid. The behaviour of elements in Theistareykir and Krafla fluids is consistent, and largely agrees with similar data obtained for the Reykjanes geothermal system in SW Iceland. We therefore posit that our results are representative for this geological setting and indicate a significant magmatic degassing cation input to deep fluids, variably modified by water–rock interaction. |
format |
Article in Journal/Newspaper |
author |
Marion Saby Vincent van Hinsberg Daniele L. Pinti Kim Berlo Bjarni Gautason Ásgerður Sigurðardóttir Kevin Brown Océane Rocher |
author_facet |
Marion Saby Vincent van Hinsberg Daniele L. Pinti Kim Berlo Bjarni Gautason Ásgerður Sigurðardóttir Kevin Brown Océane Rocher |
author_sort |
Marion Saby |
title |
The behaviour of metals in deep fluids of NE Iceland |
title_short |
The behaviour of metals in deep fluids of NE Iceland |
title_full |
The behaviour of metals in deep fluids of NE Iceland |
title_fullStr |
The behaviour of metals in deep fluids of NE Iceland |
title_full_unstemmed |
The behaviour of metals in deep fluids of NE Iceland |
title_sort |
behaviour of metals in deep fluids of ne iceland |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-26028-x https://doaj.org/article/ae4dbe6223dc4efc89f36e7177e51a5b |
long_lat |
ENVELOPE(-16.747,-16.747,65.713,65.713) ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Krafla Reykjanes |
geographic_facet |
Krafla Reykjanes |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-26028-x https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-26028-x 2045-2322 https://doaj.org/article/ae4dbe6223dc4efc89f36e7177e51a5b |
op_doi |
https://doi.org/10.1038/s41598-022-26028-x |
container_title |
Scientific Reports |
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12 |
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1766036842210131968 |