Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75
Formation of the Cretaceous Caribbean plateau, including the komatiites of Gorgona, has been linked to the currently active Galápagos hotspot. We use Hf-Nd isotopes and trace element data to characterise both the Caribbean plateau and the Galápagos hotspot, and to investigate the relationship betwee...
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Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
2003
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Online Access: | https://dx.doi.org/10.1594/pangaea.725469 https://doi.pangaea.de/10.1594/PANGAEA.725469 |
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ftdatacite:10.1594/pangaea.725469 |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label AGE Sample code/label Samarium Neodymium Samarium-147/Neodymium-144 ratio Neodymium-143/Neodymium-144 ε-Neodymium T Lutetium Hafnium Lutetium-176/Hafnium-177 ε-Hafnium Drilling/drill rig DSDP/ODP/IODP sample designation ICP-MS, Inductively coupled plasma - mass spectrometry Mass spectrometer Finnigan MAT 262 Leg15 Glomar Challenger Deep Sea Drilling Project DSDP |
spellingShingle |
Event label AGE Sample code/label Samarium Neodymium Samarium-147/Neodymium-144 ratio Neodymium-143/Neodymium-144 ε-Neodymium T Lutetium Hafnium Lutetium-176/Hafnium-177 ε-Hafnium Drilling/drill rig DSDP/ODP/IODP sample designation ICP-MS, Inductively coupled plasma - mass spectrometry Mass spectrometer Finnigan MAT 262 Leg15 Glomar Challenger Deep Sea Drilling Project DSDP Thompson, Patricia M E Kempton, Pamela D White, Rosalind V Kerr, Andrew C Tarney, J Saunders, Andrew D Fitton, J Godfrey McBirney, A Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75 |
topic_facet |
Event label AGE Sample code/label Samarium Neodymium Samarium-147/Neodymium-144 ratio Neodymium-143/Neodymium-144 ε-Neodymium T Lutetium Hafnium Lutetium-176/Hafnium-177 ε-Hafnium Drilling/drill rig DSDP/ODP/IODP sample designation ICP-MS, Inductively coupled plasma - mass spectrometry Mass spectrometer Finnigan MAT 262 Leg15 Glomar Challenger Deep Sea Drilling Project DSDP |
description |
Formation of the Cretaceous Caribbean plateau, including the komatiites of Gorgona, has been linked to the currently active Galápagos hotspot. We use Hf-Nd isotopes and trace element data to characterise both the Caribbean plateau and the Galápagos hotspot, and to investigate the relationship between them. Four geochemical components are identified in the Galápagos mantle plume: two 'enriched' components with epsilon-Hf and epsilon-Nd similar to enriched components observed in other mantle plumes, one moderately enriched component with high Nb/Y, and a fourth component which most likely represents depleted MORB source mantle. The Caribbean plateau basalt data form a linear array in Hf-Nd isotope space, consistent with mixing between two mantle components. Combined Hf-Nd-Pb-Sr-He isotope and trace element data from this study and the literature suggest that the more enriched Caribbean end member corresponds to one or both of the enriched components identified on Galápagos. Likewise, the depleted end member of the array is geochemically indistinguishable from MORB and corresponds to the depleted component of the Galápagos system. Enriched basalts from Gorgona partially overlap with the Caribbean plateau array in epsilon-Hf vs. epsilon-Nd, whereas depleted basalts, picrites and komatiites from Gorgona have a high epsilon-Hf for a given epsilon-Nd, defining a high-epsilon-Hf depleted end member that is not observed elsewhere within the Caribbean plateau sequences. This component is similar, however, in terms of Hf-Nd-Pb-He isotopes and trace elements to the depleted plume component recognised in basalts from Iceland and along the Reykjanes Ridge. We suggest that the Caribbean plateau represents the initial outpourings of the ancestral Galápagos plume. Absence of a moderately enriched, high Nb/Y component in the older Caribbean plateau (but found today on the island of Floreana) is either due to changing source compositions of the plume over its 90 Ma history, or is an artifact of limited sampling. The high-epsilon-Hf depleted component sampled by the Gorgona komatiites and depleted basalts is unique to Gorgona and is not found in the Caribbean plateau. This may be an indication of the scale of heterogeneity of the Caribbean plateau system; alternatively Gorgona may represent a separate oceanic plateau derived from a completely different Pacific plume, such as the Sala y Gomez. |
format |
Dataset |
author |
Thompson, Patricia M E Kempton, Pamela D White, Rosalind V Kerr, Andrew C Tarney, J Saunders, Andrew D Fitton, J Godfrey McBirney, A |
author_facet |
Thompson, Patricia M E Kempton, Pamela D White, Rosalind V Kerr, Andrew C Tarney, J Saunders, Andrew D Fitton, J Godfrey McBirney, A |
author_sort |
Thompson, Patricia M E |
title |
Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75 |
title_short |
Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75 |
title_full |
Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75 |
title_fullStr |
Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75 |
title_full_unstemmed |
Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75 |
title_sort |
isotope ratios and trace element concentrations of basalts from dsdp leg 15 sites (appendix 1), supplement to: thompson, patricia m e; kempton, pamela d; white, rosalind v; kerr, andrew c; tarney, j; saunders, andrew d; fitton, j godfrey; mcbirney, a (2003): hf-nd isotope constraints on the origin of the cretaceous caribbean plateau and its relationship to the galápagos plume. earth and planetary science letters, 217(1-2), 59-75 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2003 |
url |
https://dx.doi.org/10.1594/pangaea.725469 https://doi.pangaea.de/10.1594/PANGAEA.725469 |
long_lat |
ENVELOPE(-58.795,-58.795,-62.196,-62.196) ENVELOPE(65.633,65.633,-70.433,-70.433) ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-45.316,-45.316,-60.700,-60.700) |
geographic |
Gomez Kerr Pacific Reykjanes Saunders |
geographic_facet |
Gomez Kerr Pacific Reykjanes Saunders |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://dx.doi.org/10.1016/s0012-821x(03)00542-9 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.725469 https://doi.org/10.1016/s0012-821x(03)00542-9 |
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1766043757359136768 |
spelling |
ftdatacite:10.1594/pangaea.725469 2023-05-15T16:53:15+02:00 Isotope ratios and trace element concentrations of basalts from DSDP Leg 15 sites (Appendix 1), supplement to: Thompson, Patricia M E; Kempton, Pamela D; White, Rosalind V; Kerr, Andrew C; Tarney, J; Saunders, Andrew D; Fitton, J Godfrey; McBirney, A (2003): Hf-Nd isotope constraints on the origin of the Cretaceous Caribbean plateau and its relationship to the Galápagos plume. Earth and Planetary Science Letters, 217(1-2), 59-75 Thompson, Patricia M E Kempton, Pamela D White, Rosalind V Kerr, Andrew C Tarney, J Saunders, Andrew D Fitton, J Godfrey McBirney, A 2003 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.725469 https://doi.pangaea.de/10.1594/PANGAEA.725469 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/s0012-821x(03)00542-9 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label AGE Sample code/label Samarium Neodymium Samarium-147/Neodymium-144 ratio Neodymium-143/Neodymium-144 ε-Neodymium T Lutetium Hafnium Lutetium-176/Hafnium-177 ε-Hafnium Drilling/drill rig DSDP/ODP/IODP sample designation ICP-MS, Inductively coupled plasma - mass spectrometry Mass spectrometer Finnigan MAT 262 Leg15 Glomar Challenger Deep Sea Drilling Project DSDP Supplementary Dataset dataset Dataset 2003 ftdatacite https://doi.org/10.1594/pangaea.725469 https://doi.org/10.1016/s0012-821x(03)00542-9 2021-11-05T12:55:41Z Formation of the Cretaceous Caribbean plateau, including the komatiites of Gorgona, has been linked to the currently active Galápagos hotspot. We use Hf-Nd isotopes and trace element data to characterise both the Caribbean plateau and the Galápagos hotspot, and to investigate the relationship between them. Four geochemical components are identified in the Galápagos mantle plume: two 'enriched' components with epsilon-Hf and epsilon-Nd similar to enriched components observed in other mantle plumes, one moderately enriched component with high Nb/Y, and a fourth component which most likely represents depleted MORB source mantle. The Caribbean plateau basalt data form a linear array in Hf-Nd isotope space, consistent with mixing between two mantle components. Combined Hf-Nd-Pb-Sr-He isotope and trace element data from this study and the literature suggest that the more enriched Caribbean end member corresponds to one or both of the enriched components identified on Galápagos. Likewise, the depleted end member of the array is geochemically indistinguishable from MORB and corresponds to the depleted component of the Galápagos system. Enriched basalts from Gorgona partially overlap with the Caribbean plateau array in epsilon-Hf vs. epsilon-Nd, whereas depleted basalts, picrites and komatiites from Gorgona have a high epsilon-Hf for a given epsilon-Nd, defining a high-epsilon-Hf depleted end member that is not observed elsewhere within the Caribbean plateau sequences. This component is similar, however, in terms of Hf-Nd-Pb-He isotopes and trace elements to the depleted plume component recognised in basalts from Iceland and along the Reykjanes Ridge. We suggest that the Caribbean plateau represents the initial outpourings of the ancestral Galápagos plume. Absence of a moderately enriched, high Nb/Y component in the older Caribbean plateau (but found today on the island of Floreana) is either due to changing source compositions of the plume over its 90 Ma history, or is an artifact of limited sampling. The high-epsilon-Hf depleted component sampled by the Gorgona komatiites and depleted basalts is unique to Gorgona and is not found in the Caribbean plateau. This may be an indication of the scale of heterogeneity of the Caribbean plateau system; alternatively Gorgona may represent a separate oceanic plateau derived from a completely different Pacific plume, such as the Sala y Gomez. Dataset Iceland DataCite Metadata Store (German National Library of Science and Technology) Gomez ENVELOPE(-58.795,-58.795,-62.196,-62.196) Kerr ENVELOPE(65.633,65.633,-70.433,-70.433) Pacific Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Saunders ENVELOPE(-45.316,-45.316,-60.700,-60.700) |