Eintrag weiter verarbeiten
Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach
Gespeichert in:
| Zeitschriftentitel: | Climate of the Past |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | Climate of the Past, 15, 2019, 2, S. 635-646 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Copernicus GmbH
|
| Schlagwörter: |
| author_facet |
Taylor, Holly L. Duivestein, Isaac J. Kell Farkas, Juraj Dietzel, Martin Dosseto, Anthony Taylor, Holly L. Duivestein, Isaac J. Kell Farkas, Juraj Dietzel, Martin Dosseto, Anthony |
|---|---|
| author |
Taylor, Holly L. Duivestein, Isaac J. Kell Farkas, Juraj Dietzel, Martin Dosseto, Anthony |
| spellingShingle |
Taylor, Holly L. Duivestein, Isaac J. Kell Farkas, Juraj Dietzel, Martin Dosseto, Anthony Climate of the Past Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach Paleontology Stratigraphy Global and Planetary Change |
| author_sort |
taylor, holly l. |
| spelling |
Taylor, Holly L. Duivestein, Isaac J. Kell Farkas, Juraj Dietzel, Martin Dosseto, Anthony 1814-9332 Copernicus GmbH Paleontology Stratigraphy Global and Planetary Change http://dx.doi.org/10.5194/cp-15-635-2019 <jats:p>Abstract. Lithium (Li) isotopes in marine carbonates have considerable potential as a proxy to constrain past changes in silicate weathering fluxes and improve our understanding of Earth's climate. To date the majority of Li isotope studies on marine carbonates have focussed on calcium carbonates. The determination of the Li isotope fractionation between dolomite and a dolomitizing fluid would allow us to extend investigations to deep times (i.e. Precambrian) when dolostones were the most abundant marine carbonate archives. Dolostones often contain a significant proportion of detrital silicate material, which dominates the Li budget; thus, pretreatment needs to be designed so that only the isotope composition of the carbonate-associated Li is measured. This study aims to serve two main goals: (1) to determine the Li isotope fractionation between Ca–Mg carbonates and solution, and (2) to develop a method for leaching the carbonate-associated Li out of dolostone while not affecting the Li contained within the detrital portion of the rock. We synthesized Ca–Mg carbonates at high temperatures (150 to 220 ∘C) and measured the Li isotope composition (δ7Li) of the precipitated solids and their respective reactive solutions. The relationship of the Li isotope fractionation factor with temperature was obtained: 103lnαprec-sol=-(2.56±0.27)106(1)/T2+(5.8±1.3) Competitive nucleation and growth between dolomite and magnesite were observed during the experiments; however, there was no notable effect of their relative proportion on the apparent Li isotope fractionation. We found that Li isotope fractionation between the precipitated solid and solution is higher for Ca–Mg carbonates than for Ca carbonates. If the temperature of a precipitating solution is known or can be estimated independently, the above equation could be used in conjunction with the Li isotope composition of dolostones to derive the composition of the solution and hence make inferences about the past Li cycle. In addition, we also conducted leaching experiments on a Neoproterozoic dolostone and a Holocene coral. Results show that leaching with 0.05 M hydrochloric acid (HCl) or 0.5 % acetic acid (HAc) at room temperature for 60 min releases Li from the carbonate fraction without a significant contribution of Li from the siliciclastic detrital component. These experimental and analytical developments provide a basis for the use of Li isotopes in dolostones as a palaeo-environmental proxy, which will contribute to further advance our understanding of the evolution of Earth's surface environments. </jats:p> Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach Climate of the Past |
| doi_str_mv |
10.5194/cp-15-635-2019 |
| facet_avail |
Online Free |
| finc_class_facet |
Geographie Geologie und Paläontologie Physik |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9jcC0xNS02MzUtMjAxOQ |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9jcC0xNS02MzUtMjAxOQ |
| institution |
DE-105 DE-14 DE-Ch1 DE-L229 DE-D275 DE-Bn3 DE-Brt1 DE-Zwi2 DE-D161 DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 |
| imprint |
Copernicus GmbH, 2019 |
| imprint_str_mv |
Copernicus GmbH, 2019 |
| issn |
1814-9332 |
| issn_str_mv |
1814-9332 |
| language |
English |
| mega_collection |
Copernicus GmbH (CrossRef) |
| match_str |
taylor2019technicalnotelithiumisotopesindolostoneasapalaeoenvironmentalproxyanexperimentalapproach |
| publishDateSort |
2019 |
| publisher |
Copernicus GmbH |
| recordtype |
ai |
| record_format |
ai |
| series |
Climate of the Past |
| source_id |
49 |
| title |
Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_unstemmed |
Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_full |
Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_fullStr |
Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_full_unstemmed |
Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_short |
Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_sort |
technical note: lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| topic |
Paleontology Stratigraphy Global and Planetary Change |
| url |
http://dx.doi.org/10.5194/cp-15-635-2019 |
| publishDate |
2019 |
| physical |
635-646 |
| description |
<jats:p>Abstract. Lithium (Li) isotopes in marine carbonates have considerable
potential as a proxy to constrain past changes in silicate weathering fluxes
and improve our understanding of Earth's climate. To date the majority of Li
isotope studies on marine carbonates have focussed on calcium carbonates.
The determination of the Li isotope fractionation between dolomite and a
dolomitizing fluid would allow us to extend investigations to deep times
(i.e. Precambrian) when dolostones were the most abundant marine carbonate
archives. Dolostones often contain a significant proportion of detrital
silicate material, which dominates the Li budget; thus, pretreatment needs to
be designed so that only the isotope composition of the carbonate-associated
Li is measured. This study aims to serve two main goals: (1) to determine the
Li isotope fractionation between Ca–Mg carbonates and solution, and (2) to
develop a method for leaching the carbonate-associated Li out of dolostone
while not affecting the Li contained within the detrital portion of the rock.
We synthesized Ca–Mg carbonates at high temperatures (150 to 220 ∘C)
and measured the Li isotope composition (δ7Li) of the precipitated
solids and their respective reactive solutions. The relationship of the Li
isotope fractionation factor with temperature was obtained: 103lnαprec-sol=-(2.56±0.27)106(1)/T2+(5.8±1.3) Competitive nucleation and growth between dolomite and magnesite were
observed during the experiments; however, there was no notable effect of their
relative proportion on the apparent Li isotope fractionation. We found that
Li isotope fractionation between the precipitated solid and solution is higher
for Ca–Mg carbonates than for Ca carbonates. If the temperature of a
precipitating solution is known or can be estimated independently, the above
equation could be used in conjunction with the Li isotope composition of
dolostones to derive the composition of the solution and hence make inferences about the
past Li cycle. In addition, we also conducted leaching experiments on a
Neoproterozoic dolostone and a Holocene coral. Results show that leaching
with 0.05 M hydrochloric acid (HCl) or 0.5 % acetic acid (HAc) at room temperature for 60 min
releases Li from the carbonate fraction without a significant contribution of
Li from the siliciclastic detrital component. These experimental and
analytical developments provide a basis for the use of Li isotopes in
dolostones as a palaeo-environmental proxy, which will contribute to further
advance our understanding of the evolution of Earth's surface environments.
</jats:p> |
| container_issue |
2 |
| container_start_page |
635 |
| container_title |
Climate of the Past |
| container_volume |
15 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792347987948601356 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T18:04:02.019Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=Technical+note%3A+Lithium+isotopes+in+dolostone+as+a+palaeo-environmental+proxy+%E2%80%93+an+experimental+approach&rft.date=2019-04-04&genre=article&issn=1814-9332&volume=15&issue=2&spage=635&epage=646&pages=635-646&jtitle=Climate+of+the+Past&atitle=Technical+note%3A+Lithium+isotopes+in+dolostone+as+a+palaeo-environmental+proxy+%E2%80%93+an+experimental+approach&aulast=Dosseto&aufirst=Anthony&rft_id=info%3Adoi%2F10.5194%2Fcp-15-635-2019&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792347987948601356 |
| author | Taylor, Holly L., Duivestein, Isaac J. Kell, Farkas, Juraj, Dietzel, Martin, Dosseto, Anthony |
| author_facet | Taylor, Holly L., Duivestein, Isaac J. Kell, Farkas, Juraj, Dietzel, Martin, Dosseto, Anthony, Taylor, Holly L., Duivestein, Isaac J. Kell, Farkas, Juraj, Dietzel, Martin, Dosseto, Anthony |
| author_sort | taylor, holly l. |
| container_issue | 2 |
| container_start_page | 635 |
| container_title | Climate of the Past |
| container_volume | 15 |
| description | <jats:p>Abstract. Lithium (Li) isotopes in marine carbonates have considerable potential as a proxy to constrain past changes in silicate weathering fluxes and improve our understanding of Earth's climate. To date the majority of Li isotope studies on marine carbonates have focussed on calcium carbonates. The determination of the Li isotope fractionation between dolomite and a dolomitizing fluid would allow us to extend investigations to deep times (i.e. Precambrian) when dolostones were the most abundant marine carbonate archives. Dolostones often contain a significant proportion of detrital silicate material, which dominates the Li budget; thus, pretreatment needs to be designed so that only the isotope composition of the carbonate-associated Li is measured. This study aims to serve two main goals: (1) to determine the Li isotope fractionation between Ca–Mg carbonates and solution, and (2) to develop a method for leaching the carbonate-associated Li out of dolostone while not affecting the Li contained within the detrital portion of the rock. We synthesized Ca–Mg carbonates at high temperatures (150 to 220 ∘C) and measured the Li isotope composition (δ7Li) of the precipitated solids and their respective reactive solutions. The relationship of the Li isotope fractionation factor with temperature was obtained: 103lnαprec-sol=-(2.56±0.27)106(1)/T2+(5.8±1.3) Competitive nucleation and growth between dolomite and magnesite were observed during the experiments; however, there was no notable effect of their relative proportion on the apparent Li isotope fractionation. We found that Li isotope fractionation between the precipitated solid and solution is higher for Ca–Mg carbonates than for Ca carbonates. If the temperature of a precipitating solution is known or can be estimated independently, the above equation could be used in conjunction with the Li isotope composition of dolostones to derive the composition of the solution and hence make inferences about the past Li cycle. In addition, we also conducted leaching experiments on a Neoproterozoic dolostone and a Holocene coral. Results show that leaching with 0.05 M hydrochloric acid (HCl) or 0.5 % acetic acid (HAc) at room temperature for 60 min releases Li from the carbonate fraction without a significant contribution of Li from the siliciclastic detrital component. These experimental and analytical developments provide a basis for the use of Li isotopes in dolostones as a palaeo-environmental proxy, which will contribute to further advance our understanding of the evolution of Earth's surface environments. </jats:p> |
| doi_str_mv | 10.5194/cp-15-635-2019 |
| facet_avail | Online, Free |
| finc_class_facet | Geographie, Geologie und Paläontologie, Physik |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9jcC0xNS02MzUtMjAxOQ |
| imprint | Copernicus GmbH, 2019 |
| imprint_str_mv | Copernicus GmbH, 2019 |
| institution | DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1 |
| issn | 1814-9332 |
| issn_str_mv | 1814-9332 |
| language | English |
| last_indexed | 2024-03-01T18:04:02.019Z |
| match_str | taylor2019technicalnotelithiumisotopesindolostoneasapalaeoenvironmentalproxyanexperimentalapproach |
| mega_collection | Copernicus GmbH (CrossRef) |
| physical | 635-646 |
| publishDate | 2019 |
| publishDateSort | 2019 |
| publisher | Copernicus GmbH |
| record_format | ai |
| recordtype | ai |
| series | Climate of the Past |
| source_id | 49 |
| spelling | Taylor, Holly L. Duivestein, Isaac J. Kell Farkas, Juraj Dietzel, Martin Dosseto, Anthony 1814-9332 Copernicus GmbH Paleontology Stratigraphy Global and Planetary Change http://dx.doi.org/10.5194/cp-15-635-2019 <jats:p>Abstract. Lithium (Li) isotopes in marine carbonates have considerable potential as a proxy to constrain past changes in silicate weathering fluxes and improve our understanding of Earth's climate. To date the majority of Li isotope studies on marine carbonates have focussed on calcium carbonates. The determination of the Li isotope fractionation between dolomite and a dolomitizing fluid would allow us to extend investigations to deep times (i.e. Precambrian) when dolostones were the most abundant marine carbonate archives. Dolostones often contain a significant proportion of detrital silicate material, which dominates the Li budget; thus, pretreatment needs to be designed so that only the isotope composition of the carbonate-associated Li is measured. This study aims to serve two main goals: (1) to determine the Li isotope fractionation between Ca–Mg carbonates and solution, and (2) to develop a method for leaching the carbonate-associated Li out of dolostone while not affecting the Li contained within the detrital portion of the rock. We synthesized Ca–Mg carbonates at high temperatures (150 to 220 ∘C) and measured the Li isotope composition (δ7Li) of the precipitated solids and their respective reactive solutions. The relationship of the Li isotope fractionation factor with temperature was obtained: 103lnαprec-sol=-(2.56±0.27)106(1)/T2+(5.8±1.3) Competitive nucleation and growth between dolomite and magnesite were observed during the experiments; however, there was no notable effect of their relative proportion on the apparent Li isotope fractionation. We found that Li isotope fractionation between the precipitated solid and solution is higher for Ca–Mg carbonates than for Ca carbonates. If the temperature of a precipitating solution is known or can be estimated independently, the above equation could be used in conjunction with the Li isotope composition of dolostones to derive the composition of the solution and hence make inferences about the past Li cycle. In addition, we also conducted leaching experiments on a Neoproterozoic dolostone and a Holocene coral. Results show that leaching with 0.05 M hydrochloric acid (HCl) or 0.5 % acetic acid (HAc) at room temperature for 60 min releases Li from the carbonate fraction without a significant contribution of Li from the siliciclastic detrital component. These experimental and analytical developments provide a basis for the use of Li isotopes in dolostones as a palaeo-environmental proxy, which will contribute to further advance our understanding of the evolution of Earth's surface environments. </jats:p> Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach Climate of the Past |
| spellingShingle | Taylor, Holly L., Duivestein, Isaac J. Kell, Farkas, Juraj, Dietzel, Martin, Dosseto, Anthony, Climate of the Past, Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach, Paleontology, Stratigraphy, Global and Planetary Change |
| title | Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_full | Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_fullStr | Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_full_unstemmed | Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_short | Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_sort | technical note: lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| title_unstemmed | Technical note: Lithium isotopes in dolostone as a palaeo-environmental proxy – an experimental approach |
| topic | Paleontology, Stratigraphy, Global and Planetary Change |
| url | http://dx.doi.org/10.5194/cp-15-635-2019 |