Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213
This study presents a high-resolution record of osmium and thallium isotopes in a ferro-manganese (Fe-Mn) crust from the Indian Ocean, Antipode 109D-C. These results, when combined with additional new Os isotope data from ODP Hole 756B in the southeast Indian Ocean, define a new best estimate for th...
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ftdatacite:10.1594/pangaea.817623 2023-05-15T17:13:55+02:00 Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213 Nielsen, Sune G Gannoun, Abdelmouhcine Marnham, Charles Burton, Kevin W Halliday, Alex N Hein, James R 2011 application/zip https://dx.doi.org/10.1594/pangaea.817623 https://doi.pangaea.de/10.1594/PANGAEA.817623 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2010pa002003 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Dredge Leg121 ANTIPODE Joides Resolution Melville Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 2011 ftdatacite https://doi.org/10.1594/pangaea.817623 https://doi.org/10.1029/2010pa002003 2022-02-08T16:24:46Z This study presents a high-resolution record of osmium and thallium isotopes in a ferro-manganese (Fe-Mn) crust from the Indian Ocean, Antipode 109D-C. These results, when combined with additional new Os isotope data from ODP Hole 756B in the southeast Indian Ocean, define a new best estimate for the age at the base of this crust of ~6.5 Ma, which is significantly different from a previous estimate of ~15 Ma based on Co-flux modeling. The Tl isotope record obtained for the Indian Ocean resembles that for the Pacific Ocean with a small but well-defined increase occurring over the last ~5 Myr. This contrasts with two records from the Atlantic Ocean which do not have resolvable variations. Ocean basin-scale Tl isotope variation may be inconsistent with the inferred modern marine residence time for Tl of ~20 kyr but could be explained by an increase in ocean crust production rates in the Pacific and Indian oceans since ~10 Ma. The improved age model for 109D-C reveals that the Hf isotope composition of Indian Ocean bottom waters has remained homogenous over the last ~6 Myr. Thus, this isotope system does not bear any evidence that the influence of North Atlantic Deep Water in the formation of Indian Ocean bottom waters has changed during that time. However, because of the lack of knowledge about Hf isotopes as a tracer of ocean circulation, we cannot conclude that export of NADW decreased over the last 6 Myr. Article in Journal/Newspaper NADW North Atlantic Deep Water North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Pacific Indian Burton ENVELOPE(166.733,166.733,-72.550,-72.550) Ferro ENVELOPE(16.233,16.233,66.717,66.717) Halliday ENVELOPE(-128.617,-128.617,54.476,54.476) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Dredge Leg121 ANTIPODE Joides Resolution Melville Ocean Drilling Program ODP |
spellingShingle |
Drilling/drill rig Dredge Leg121 ANTIPODE Joides Resolution Melville Ocean Drilling Program ODP Nielsen, Sune G Gannoun, Abdelmouhcine Marnham, Charles Burton, Kevin W Halliday, Alex N Hein, James R Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213 |
topic_facet |
Drilling/drill rig Dredge Leg121 ANTIPODE Joides Resolution Melville Ocean Drilling Program ODP |
description |
This study presents a high-resolution record of osmium and thallium isotopes in a ferro-manganese (Fe-Mn) crust from the Indian Ocean, Antipode 109D-C. These results, when combined with additional new Os isotope data from ODP Hole 756B in the southeast Indian Ocean, define a new best estimate for the age at the base of this crust of ~6.5 Ma, which is significantly different from a previous estimate of ~15 Ma based on Co-flux modeling. The Tl isotope record obtained for the Indian Ocean resembles that for the Pacific Ocean with a small but well-defined increase occurring over the last ~5 Myr. This contrasts with two records from the Atlantic Ocean which do not have resolvable variations. Ocean basin-scale Tl isotope variation may be inconsistent with the inferred modern marine residence time for Tl of ~20 kyr but could be explained by an increase in ocean crust production rates in the Pacific and Indian oceans since ~10 Ma. The improved age model for 109D-C reveals that the Hf isotope composition of Indian Ocean bottom waters has remained homogenous over the last ~6 Myr. Thus, this isotope system does not bear any evidence that the influence of North Atlantic Deep Water in the formation of Indian Ocean bottom waters has changed during that time. However, because of the lack of knowledge about Hf isotopes as a tracer of ocean circulation, we cannot conclude that export of NADW decreased over the last 6 Myr. |
format |
Article in Journal/Newspaper |
author |
Nielsen, Sune G Gannoun, Abdelmouhcine Marnham, Charles Burton, Kevin W Halliday, Alex N Hein, James R |
author_facet |
Nielsen, Sune G Gannoun, Abdelmouhcine Marnham, Charles Burton, Kevin W Halliday, Alex N Hein, James R |
author_sort |
Nielsen, Sune G |
title |
Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213 |
title_short |
Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213 |
title_full |
Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213 |
title_fullStr |
Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213 |
title_full_unstemmed |
Os and Tl isotope measurements from 109D-C and ODP Hole 121-756B, supplement to: Nielsen, Sune G; Gannoun, Abdelmouhcine; Marnham, Charles; Burton, Kevin W; Halliday, Alex N; Hein, James R (2011): New age for ferromanganese crust 109D-C and implications for isotopic records of lead, neodymium, hafnium, and thallium in the Pliocene Indian Ocean. Paleoceanography, 26(2), PA2213 |
title_sort |
os and tl isotope measurements from 109d-c and odp hole 121-756b, supplement to: nielsen, sune g; gannoun, abdelmouhcine; marnham, charles; burton, kevin w; halliday, alex n; hein, james r (2011): new age for ferromanganese crust 109d-c and implications for isotopic records of lead, neodymium, hafnium, and thallium in the pliocene indian ocean. paleoceanography, 26(2), pa2213 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2011 |
url |
https://dx.doi.org/10.1594/pangaea.817623 https://doi.pangaea.de/10.1594/PANGAEA.817623 |
long_lat |
ENVELOPE(166.733,166.733,-72.550,-72.550) ENVELOPE(16.233,16.233,66.717,66.717) ENVELOPE(-128.617,-128.617,54.476,54.476) |
geographic |
Pacific Indian Burton Ferro Halliday |
geographic_facet |
Pacific Indian Burton Ferro Halliday |
genre |
NADW North Atlantic Deep Water North Atlantic |
genre_facet |
NADW North Atlantic Deep Water North Atlantic |
op_relation |
https://dx.doi.org/10.1029/2010pa002003 |
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.817623 https://doi.org/10.1029/2010pa002003 |
_version_ |
1766071110139379712 |