Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption
Chemical weathering of silicate rocks is a key control on the long-term climate, via drawdown of atmospheric CO2. Magnesium isotopes are increasingly being used to trace weathering, but are often complicated by several coincident fractionating processes. Here we examine Mg isotope ratios of waters s...
Published in: | Frontiers in Earth Science |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media
2019
|
Subjects: | |
Online Access: | https://eprints.bbk.ac.uk/id/eprint/26099/ https://eprints.bbk.ac.uk/id/eprint/26099/1/Eyjafjallajokull%20Mg%20resubmission.pdf https://eprints.bbk.ac.uk/id/eprint/26099/6/26099.pdf https://doi.org/10.3389/feart.2019.00006 |
id |
ftbirkbeckcoll:oai:eprints.bbk.ac.uk.oai2:26099 |
---|---|
record_format |
openpolar |
spelling |
ftbirkbeckcoll:oai:eprints.bbk.ac.uk.oai2:26099 2023-05-15T16:09:27+02:00 Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption Pogge von Strandmann, Philip A.E. Olsson, J. Luu, T.-H. Gislason, S. Burton, K. 2019-02-01 text https://eprints.bbk.ac.uk/id/eprint/26099/ https://eprints.bbk.ac.uk/id/eprint/26099/1/Eyjafjallajokull%20Mg%20resubmission.pdf https://eprints.bbk.ac.uk/id/eprint/26099/6/26099.pdf https://doi.org/10.3389/feart.2019.00006 en eng Frontiers Media https://eprints.bbk.ac.uk/id/eprint/26099/1/Eyjafjallajokull%20Mg%20resubmission.pdf https://eprints.bbk.ac.uk/id/eprint/26099/6/26099.pdf Pogge von Strandmann, Philip A.E. and Olsson, J. and Luu, T.-H. and Gislason, S. and Burton, K. (2019) Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption. Frontiers in Earth Science 7 (6), ISSN 2296-6463. cc_by_4 CC-BY Earth and Planetary Sciences Article PeerReviewed 2019 ftbirkbeckcoll https://doi.org/10.3389/feart.2019.00006 2022-01-09T09:04:35Z Chemical weathering of silicate rocks is a key control on the long-term climate, via drawdown of atmospheric CO2. Magnesium isotopes are increasingly being used to trace weathering, but are often complicated by several coincident fractionating processes. Here we examine Mg isotope ratios of waters stemming from beneath lava flows from the 2010 Eyjafjallajökull eruption. Travertine calcite was observed directly precipitating from these high-TDS (total dissolved solids) waters, and were also sampled. This system therefore provides the opportunity to study natural Mg isotope fractionation by calcite. Riverine δ26Mg increase from −2.37 to +0.43% with flow distance, as isotopically light travertine precipitates (δ26Mg = −3.38 to −3.94%). The solution Mg isotope ratios also co-vary with pH, calcite saturation indices and Sr/Ca ratios, strongly indicating that they are dominantly controlled by carbonate precipitation. Using experimental isotopic fractionation factors and the measured δ26Mg values, we can predict the compositions of the precipitated travertines that are within uncertainty of the directly measured travertines. Hence, in some systems, Mg isotopes can be used to quantify carbonate precipitation. Article in Journal/Newspaper Eyjafjallajökull BIROn - Birkbeck Institutional Research Online (Birkbeck University of London) Frontiers in Earth Science 7 |
institution |
Open Polar |
collection |
BIROn - Birkbeck Institutional Research Online (Birkbeck University of London) |
op_collection_id |
ftbirkbeckcoll |
language |
English |
topic |
Earth and Planetary Sciences |
spellingShingle |
Earth and Planetary Sciences Pogge von Strandmann, Philip A.E. Olsson, J. Luu, T.-H. Gislason, S. Burton, K. Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption |
topic_facet |
Earth and Planetary Sciences |
description |
Chemical weathering of silicate rocks is a key control on the long-term climate, via drawdown of atmospheric CO2. Magnesium isotopes are increasingly being used to trace weathering, but are often complicated by several coincident fractionating processes. Here we examine Mg isotope ratios of waters stemming from beneath lava flows from the 2010 Eyjafjallajökull eruption. Travertine calcite was observed directly precipitating from these high-TDS (total dissolved solids) waters, and were also sampled. This system therefore provides the opportunity to study natural Mg isotope fractionation by calcite. Riverine δ26Mg increase from −2.37 to +0.43% with flow distance, as isotopically light travertine precipitates (δ26Mg = −3.38 to −3.94%). The solution Mg isotope ratios also co-vary with pH, calcite saturation indices and Sr/Ca ratios, strongly indicating that they are dominantly controlled by carbonate precipitation. Using experimental isotopic fractionation factors and the measured δ26Mg values, we can predict the compositions of the precipitated travertines that are within uncertainty of the directly measured travertines. Hence, in some systems, Mg isotopes can be used to quantify carbonate precipitation. |
format |
Article in Journal/Newspaper |
author |
Pogge von Strandmann, Philip A.E. Olsson, J. Luu, T.-H. Gislason, S. Burton, K. |
author_facet |
Pogge von Strandmann, Philip A.E. Olsson, J. Luu, T.-H. Gislason, S. Burton, K. |
author_sort |
Pogge von Strandmann, Philip A.E. |
title |
Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption |
title_short |
Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption |
title_full |
Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption |
title_fullStr |
Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption |
title_full_unstemmed |
Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption |
title_sort |
using mg isotopes to estimate natural calcite compositions and precipitation rates during the 2010 eyjafjallajökull eruption |
publisher |
Frontiers Media |
publishDate |
2019 |
url |
https://eprints.bbk.ac.uk/id/eprint/26099/ https://eprints.bbk.ac.uk/id/eprint/26099/1/Eyjafjallajokull%20Mg%20resubmission.pdf https://eprints.bbk.ac.uk/id/eprint/26099/6/26099.pdf https://doi.org/10.3389/feart.2019.00006 |
genre |
Eyjafjallajökull |
genre_facet |
Eyjafjallajökull |
op_relation |
https://eprints.bbk.ac.uk/id/eprint/26099/1/Eyjafjallajokull%20Mg%20resubmission.pdf https://eprints.bbk.ac.uk/id/eprint/26099/6/26099.pdf Pogge von Strandmann, Philip A.E. and Olsson, J. and Luu, T.-H. and Gislason, S. and Burton, K. (2019) Using Mg Isotopes to estimate natural Calcite compositions and precipitation rates during the 2010 Eyjafjallajökull eruption. Frontiers in Earth Science 7 (6), ISSN 2296-6463. |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2019.00006 |
container_title |
Frontiers in Earth Science |
container_volume |
7 |
_version_ |
1766405341808951296 |