Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones
Free to read at publisher's site. We provide new insights into the geochemistry of serpentinites from mid-ocean ridges (Mid-Atlantic Ridge and Hess Deep), passive margins (Iberia Abyssal Plain and Newfoundland) and fore-arcs (Mariana and Guatemala) based on bulk-rock and in situ mineral major a...
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Oxford University Press
2012
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ftqueensland:oai:eprints.qut.edu.au:126218 2024-05-19T07:44:20+00:00 Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones Kodolanyi, Janos Pettke, Thomas Spandler, Carl Kamber, Balz Gmeling, Katalin 2012 https://eprints.qut.edu.au/126218/ unknown Oxford University Press doi:10.1093/petrology/egr058 Kodolanyi, Janos, Pettke, Thomas, Spandler, Carl, Kamber, Balz, & Gmeling, Katalin (2012) Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones. Journal of Petrology, 53(2), pp. 235-270. https://eprints.qut.edu.au/126218/ Science & Engineering Faculty Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Journal of Petrology Deep Sea Drilling Project Geochemistry and Geophysics Ocean Drilling Program abyssal peridotites continent transition feather river ophiolite field gamma activation-analysis lithospheric mantle logatchev hydrothermal mgo-sio2-h2o mid-atlantic ridge serpentinite subduction system trace elements trace-elements upper-mantle Contribution to Journal 2012 ftqueensland https://doi.org/10.1093/petrology/egr058 2024-04-30T23:47:21Z Free to read at publisher's site. We provide new insights into the geochemistry of serpentinites from mid-ocean ridges (Mid-Atlantic Ridge and Hess Deep), passive margins (Iberia Abyssal Plain and Newfoundland) and fore-arcs (Mariana and Guatemala) based on bulk-rock and in situ mineral major and trace element compositional data collected on drill cores from the Deep Sea Drilling Project and Ocean Drilling Program. These data are important for constraining the serpentinite-hosted trace element inventory of subduction zones. Bulk serpentinites show up to several orders of magnitude enrichments in Cl, B, Sr, U, Sb, Pb, Rb, Cs and Li relative to elements of similar compatibility during mantle melting, which correspond to the highest primitive mantle-normalized B/Nb, B/Th, U/Th, Sb/Ce, Sr/Nd and Li/Y among subducted lithologies of the oceanic lithosphere (serpentinites, sediments and altered igneous oceanic crust). Among the elements showing relative enrichment, Cl and B are by far the most abundant with bulk concentrations mostly above 1000 mu g g(-1) and 30 mu g g(-1), respectively. All other trace elements showing relative enrichments are generally present in low concentrations (mu g g(-1) level), except Sr in carbonate-bearing serpentinites (thousands of mu g g(-1)). In situ data indicate that concentrations of Cl, B, Sr, U, Sb, Rb and Cs are, and that of Li can be, increased by serpentinization. These elements are largely hosted in serpentine (lizardite and chrysotile, but not antigorite). Aragonite precipitation leads to significant enrichments in Sr, U and B, whereas calcite is important only as an Sr host. Commonly observed brucite is trace element-poor. The overall enrichment patterns are comparable among serpentinites from mid-ocean ridges, passive margins and fore-arcs, whereas the extents of enrichments are often specific to the geodynamic setting. Variability in relative trace element enrichments within a specific setting (and locality) can be several orders of magnitude. Mid-ocean ridge serpentinites ... Article in Journal/Newspaper Newfoundland Queensland University of Technology: QUT ePrints Journal of Petrology 53 2 235 270 |
institution |
Open Polar |
collection |
Queensland University of Technology: QUT ePrints |
op_collection_id |
ftqueensland |
language |
unknown |
topic |
Deep Sea Drilling Project Geochemistry and Geophysics Ocean Drilling Program abyssal peridotites continent transition feather river ophiolite field gamma activation-analysis lithospheric mantle logatchev hydrothermal mgo-sio2-h2o mid-atlantic ridge serpentinite subduction system trace elements trace-elements upper-mantle |
spellingShingle |
Deep Sea Drilling Project Geochemistry and Geophysics Ocean Drilling Program abyssal peridotites continent transition feather river ophiolite field gamma activation-analysis lithospheric mantle logatchev hydrothermal mgo-sio2-h2o mid-atlantic ridge serpentinite subduction system trace elements trace-elements upper-mantle Kodolanyi, Janos Pettke, Thomas Spandler, Carl Kamber, Balz Gmeling, Katalin Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones |
topic_facet |
Deep Sea Drilling Project Geochemistry and Geophysics Ocean Drilling Program abyssal peridotites continent transition feather river ophiolite field gamma activation-analysis lithospheric mantle logatchev hydrothermal mgo-sio2-h2o mid-atlantic ridge serpentinite subduction system trace elements trace-elements upper-mantle |
description |
Free to read at publisher's site. We provide new insights into the geochemistry of serpentinites from mid-ocean ridges (Mid-Atlantic Ridge and Hess Deep), passive margins (Iberia Abyssal Plain and Newfoundland) and fore-arcs (Mariana and Guatemala) based on bulk-rock and in situ mineral major and trace element compositional data collected on drill cores from the Deep Sea Drilling Project and Ocean Drilling Program. These data are important for constraining the serpentinite-hosted trace element inventory of subduction zones. Bulk serpentinites show up to several orders of magnitude enrichments in Cl, B, Sr, U, Sb, Pb, Rb, Cs and Li relative to elements of similar compatibility during mantle melting, which correspond to the highest primitive mantle-normalized B/Nb, B/Th, U/Th, Sb/Ce, Sr/Nd and Li/Y among subducted lithologies of the oceanic lithosphere (serpentinites, sediments and altered igneous oceanic crust). Among the elements showing relative enrichment, Cl and B are by far the most abundant with bulk concentrations mostly above 1000 mu g g(-1) and 30 mu g g(-1), respectively. All other trace elements showing relative enrichments are generally present in low concentrations (mu g g(-1) level), except Sr in carbonate-bearing serpentinites (thousands of mu g g(-1)). In situ data indicate that concentrations of Cl, B, Sr, U, Sb, Rb and Cs are, and that of Li can be, increased by serpentinization. These elements are largely hosted in serpentine (lizardite and chrysotile, but not antigorite). Aragonite precipitation leads to significant enrichments in Sr, U and B, whereas calcite is important only as an Sr host. Commonly observed brucite is trace element-poor. The overall enrichment patterns are comparable among serpentinites from mid-ocean ridges, passive margins and fore-arcs, whereas the extents of enrichments are often specific to the geodynamic setting. Variability in relative trace element enrichments within a specific setting (and locality) can be several orders of magnitude. Mid-ocean ridge serpentinites ... |
format |
Article in Journal/Newspaper |
author |
Kodolanyi, Janos Pettke, Thomas Spandler, Carl Kamber, Balz Gmeling, Katalin |
author_facet |
Kodolanyi, Janos Pettke, Thomas Spandler, Carl Kamber, Balz Gmeling, Katalin |
author_sort |
Kodolanyi, Janos |
title |
Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones |
title_short |
Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones |
title_full |
Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones |
title_fullStr |
Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones |
title_full_unstemmed |
Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones |
title_sort |
geochemistry of ocean floor and fore-arc serpentinites: constraints on the ultramafic input to subduction zones |
publisher |
Oxford University Press |
publishDate |
2012 |
url |
https://eprints.qut.edu.au/126218/ |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Journal of Petrology |
op_relation |
doi:10.1093/petrology/egr058 Kodolanyi, Janos, Pettke, Thomas, Spandler, Carl, Kamber, Balz, & Gmeling, Katalin (2012) Geochemistry of ocean floor and fore-arc serpentinites: Constraints on the ultramafic input to subduction zones. Journal of Petrology, 53(2), pp. 235-270. https://eprints.qut.edu.au/126218/ Science & Engineering Faculty |
op_rights |
Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.1093/petrology/egr058 |
container_title |
Journal of Petrology |
container_volume |
53 |
container_issue |
2 |
container_start_page |
235 |
op_container_end_page |
270 |
_version_ |
1799484113979179008 |