Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands

Opfergelt, S.; Williams, H.M.; Cornelis, J.T.; Guicharnaud, R.A.; Georg, R.B.; Siebert, C.; Gislason, S.R.; Halliday, A.N.; Burton, K.W.

doi:10.1016/j.gca.2017.08.033

Mantle depletion recorded by olivine and plagioclase megacrysts in oceanic basalts (2024)
Journal Article
Burton, K., Parkinson, I., & Neave, D. (in press). Mantle depletion recorded by olivine and plagioclase megacrysts in oceanic basalts. Geochemical perspectives letters, 29, 9-13. https://doi.org/10.7185/geochemlet.2405

Earth’s oceanic crust is largely formed by melting of the upper mantle where it upwells beneath mid-ocean ridges, providing a geographically widespread elemental and isotopic ‘sample’ of Earth’s interior. Radiogenic isotope variations in oceanic basa... Read More about Mantle depletion recorded by olivine and plagioclase megacrysts in oceanic basalts.

Rhenium elemental and isotopic variations at magmatic temperatures (2024)
Journal Article
Wang, W., Dickson, A., Stow, M., Dellinger, M., Burton, K., Savage, P., …Prytulak, J. (2024). Rhenium elemental and isotopic variations at magmatic temperatures. Geochemical perspectives letters, 28, 48-53. https://doi.org/10.7185/geochemlet.2402

Recent analytical advances in the measurement of rhenium (Re) isotope ratios allow its potential as a palaeoredox and chemical weathering proxy to be explored. However, a successful isotopic proxy must be grounded by an understanding of its compositi... Read More about Rhenium elemental and isotopic variations at magmatic temperatures.

Assessing hydrological controls on the lithium isotope weathering tracer (2023)
Journal Article
Pogge von Strandmann, P. A., Cosford, L. R., Liu, C., Liu, X., Krause, A. J., Wilson, D. J., …Burton, K. W. (2023). Assessing hydrological controls on the lithium isotope weathering tracer. Chemical Geology, 642, Article 121801. https://doi.org/10.1016/j.chemgeo.2023.121801

To investigate the impact of riverine discharge and weathering intensity on lithium isotopes (δ7Li) in a mono-lithological terrain, this study examines the dissolved load and leached suspended load (exchangeable, oxide, and clay fractions) from Icela... Read More about Assessing hydrological controls on the lithium isotope weathering tracer.

Decoupling of inorganic and organic carbon during slab mantle devolatilisation (2022)
Journal Article
Bouilhol, P., Debret, B., Inglis, E., Warembourg, M., Grocolas, T., Rigaudier, T., …Burton, K. (2022). Decoupling of inorganic and organic carbon during slab mantle devolatilisation. Nature Communications, 13(1), Article 308. https://doi.org/10.1038/s41467-022-27970-0

Serpentinites are an important sink for both inorganic and organic carbon, and their behavior during subduction is thought to play a fundamental role in the global cycling of carbon. Here we show that fluid-derived veins are preserved within the Zerm... Read More about Decoupling of inorganic and organic carbon during slab mantle devolatilisation.

Fossil records of early solar irradiation and cosmolocation of the CAI factory: A reappraisal (2021)
Journal Article
Bekaert, D. V., Auro, M., Shollenberger, Q. R., Liu, M., Marschall, H., Burton, K. W., …Nielsen, S. G. (2021). Fossil records of early solar irradiation and cosmolocation of the CAI factory: A reappraisal. Science Advances, 7(40), Article eabg8329. https://doi.org/10.1126/sciadv.abg8329

Calcium-aluminum–rich inclusions (CAIs) in meteorites carry crucial information about the environmental conditions of the nascent Solar System prior to planet formation. Based on models of 50V–10Be co-production by in-situ irradiation, CAIs are consi... Read More about Fossil records of early solar irradiation and cosmolocation of the CAI factory: A reappraisal.

The lithium isotope response to the variable weathering of soils in Iceland (2021)
Journal Article
Pogge von Strandmann, P. A., Burton, K. W., Opfergelt, S., Genson, B., Guicharnaud, R. A., & Gislason, S. R. (2021). The lithium isotope response to the variable weathering of soils in Iceland. Geochimica et Cosmochimica Acta, 313, 55-73. https://doi.org/10.1016/j.gca.2021.08.020

This study has analysed Li isotopes ratios from well-studied soil and pore water profiles from Iceland that have the same parent material but have experienced different degrees of chemical weathering. Thus, from least to most weathered, we have analy... Read More about The lithium isotope response to the variable weathering of soils in Iceland.

Ge and Si isotope behavior during intense tropical weathering and ecosystem cycling (2020)
Journal Article
Baronas, J. J., West, A. J., Burton, K. W., Hammond, D. E., Opfergelt, S., Pogge von Strandmann, P. A., …Rouxel, O. J. (2020). Ge and Si isotope behavior during intense tropical weathering and ecosystem cycling. Global Biogeochemical Cycles, 34(8), Article e2019GB006522. https://doi.org/10.1029/2019gb006522

Chemical weathering of volcanic rocks in warm and humid climates contributes disproportionately to global solute fluxes. Geochemical signatures of solutes and solids formed during this process can help quantify and reconstruct weathering intensity in... Read More about Ge and Si isotope behavior during intense tropical weathering and ecosystem cycling.

Hydrothermal and Cold Spring Water and Primary Productivity Effects on Magnesium Isotopes: Lake Myvatn, Iceland (2020)
Journal Article
Pogge von Strandmann, P. A., Burton, K. W., Opfergelt, S., Eiríksdóttir, E. S., Murphy, M. J., Einarsson, A., & Gislason, S. R. (2020). Hydrothermal and Cold Spring Water and Primary Productivity Effects on Magnesium Isotopes: Lake Myvatn, Iceland. Frontiers in Earth Science, 8, Article 109. https://doi.org/10.3389/feart.2020.00109

Lake Myvatn, Iceland, is one of the most biologically productive lakes in the northern hemisphere, despite seasonal ice cover. Hydrothermal and groundwater springs make up the dominant source to this lake, and we investigate their Mg isotope ratio to... Read More about Hydrothermal and Cold Spring Water and Primary Productivity Effects on Magnesium Isotopes: Lake Myvatn, Iceland.

The neodymium stable isotope composition of the oceanic crust: Reconciling the mismatch between erupted mid-ocean ridge basalts and lower crustal gabbros (2020)
Journal Article
McCoy-West, A. J., Millet, M., & Burton, K. W. (2020). The neodymium stable isotope composition of the oceanic crust: Reconciling the mismatch between erupted mid-ocean ridge basalts and lower crustal gabbros. Frontiers in Earth Science, 8, Article 25. https://doi.org/10.3389/feart.2020.00025

The trace element and isotopic compositions of mid-ocean ridge basalts (MORB) provide an important cornerstone for all studies seeking to understand mantle evolution. Globally there is a significant over-enrichment in the incompatible trace element c... Read More about The neodymium stable isotope composition of the oceanic crust: Reconciling the mismatch between erupted mid-ocean ridge basalts and lower crustal gabbros.

Release of oxidizing fluids in subduction zones recorded by iron isotope zonation in garnet (2019)
Journal Article
Gerrits, A. R., Inglis, E., Dragovic, B., Starr, P. G., Baxter, E. F., & Burton, K. (2019). Release of oxidizing fluids in subduction zones recorded by iron isotope zonation in garnet. Nature Geoscience, 12, 1029-1033. https://doi.org/10.1038/s41561-019-0471-y

Subduction zones are key regions of chemical and mass transfer between the Earth’s surface and mantle. During subduction, oxidized material is carried into the mantle and large amounts of water are released due to the breakdown of hydrous minerals su... Read More about Release of oxidizing fluids in subduction zones recorded by iron isotope zonation in garnet.

Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes (2019)
Journal Article
McCoy-West, A. J., Chowdhury, P., Burton, K. W., Sossi, P., Nowell, G. M., Fitton, J. G., …Williams, H. M. (2019). Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes. Nature Geoscience, 12, 946-951. https://doi.org/10.1038/s41561-019-0451-2

Estimates of the volume of the earliest crust based on zircon ages and radiogenic isotopes remain equivocal. Stable isotope systems, such as molybdenum, have the potential to provide further constraints but remain underused due to the lack of complem... Read More about Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes.

Controlling Mechanisms for Molybdenum Isotope Fractionation in Porphyry Deposits: The Qulong Example (2019)
Journal Article
Li, Y., McCoy-West, A. J., Zhang, S., Selby, D., Burton, K. W., & Horan, K. (2019). Controlling Mechanisms for Molybdenum Isotope Fractionation in Porphyry Deposits: The Qulong Example. Economic geology and the bulletin of the Society of Economic Geologists, 114(5), 981-992. https://doi.org/10.5382/econgeo.4653

Molybdenite-bearing porphyry deposits are the predominant supplier of molybdenum to industrialized society and one of the main hosts of Mo in the upper continental crust. The Mo isotope compositions (δ98/95Mo, normalized to NIST3134 equals 0‰) of mol... Read More about Controlling Mechanisms for Molybdenum Isotope Fractionation in Porphyry Deposits: The Qulong Example.

Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes (2019)
Journal Article
Pogge von Strandmann, P. A., Burton, K. W., Snæbjörnsdóttir, S. O., Sigfússon, B., Aradóttir, E. S., Gunnarsson, I., …Gislason, S. R. (2019). Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes. Nature Communications, 10(1), Article 1983. https://doi.org/10.1038/s41467-019-10003-8

The engineered removal of atmospheric CO2 is now considered a key component of mitigating climate warming below 1.5 °C. Mineral carbonation is a potential negative emissions technique that, in the case of Iceland’s CarbFix experiment, precipitates di... Read More about Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes.

Using Mg Isotopes to Estimate Natural Calcite Compositions and Precipitation Rates During the 2010 Eyjafjallajökull Eruption (2019)
Journal Article
Pogge von Strandmann, P. A., Olsson, J., Luu, T., Gislason, S. R., & Burton, K. W. (2019). Using Mg Isotopes to Estimate Natural Calcite Compositions and Precipitation Rates During the 2010 Eyjafjallajökull Eruption. Frontiers in Earth Science, 7, Article 6. https://doi.org/10.3389/feart.2019.00006

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 proces... Read More about Using Mg Isotopes to Estimate Natural Calcite Compositions and Precipitation Rates During the 2010 Eyjafjallajökull Eruption.

The primordial He budget of the Earth set by percolative core formation in planetesimals (2019)
Journal Article
Roth, A., Liebske, C., Maden, C., Burton, K., Schönbächler, M., & Busemann, H. (2019). The primordial He budget of the Earth set by percolative core formation in planetesimals. Geochemical perspectives letters, 9, 26-31. https://doi.org/10.7185/geochemlet.1901

The primordial He budget of the Earth’s interior is commonly thought to have been set by full liquid metal-silicate equilibration in a terrestrial magma ocean. However, incomplete metal-silicate equilibration during accretion will have a substantial... Read More about The primordial He budget of the Earth set by percolative core formation in planetesimals.

Tracing the impact of coastal water geochemistry on the Re-Os systematics of macroalgae: Insights from the basaltic terrain of Iceland (2018)
Journal Article
Sproson, A. D., Selby, D., Gannoun, A., Burton, K. W., Dellinger, M., & Lloyd, J. M. (2018). Tracing the impact of coastal water geochemistry on the Re-Os systematics of macroalgae: Insights from the basaltic terrain of Iceland. Journal of Geophysical Research: Biogeosciences, 123(9), 2791-2806. https://doi.org/10.1029/2018jg004492

This study presents rhenium (Re) and osmium (Os) elemental and isotope data for macroalgae, dissolved load and bed load from Icelandic coastal and/or river waters, an environment adjacent to predominantly basaltic terrains, ranging in age from histor... Read More about Tracing the impact of coastal water geochemistry on the Re-Os systematics of macroalgae: Insights from the basaltic terrain of Iceland.

Molybdenum isotope behaviour in groundwaters and terrestrial hydrothermal systems, Iceland (2018)
Journal Article
Neely, R. A., Gislason, S. R., Ólafsson, M., McCoy-West, A. J., Pearce, C. R., & Burton, K. W. (2018). Molybdenum isotope behaviour in groundwaters and terrestrial hydrothermal systems, Iceland. Earth and Planetary Science Letters, 486, 108-118. https://doi.org/10.1016/j.epsl.2017.11.053

Molybdenum (Mo) isotopes have proved useful in the reconstruction of paleoredox conditions. Their application generally relies upon a simplified model of ocean inputs in which rivers dominate Mo fluxes to the oceans and hydrothermal fluids are consid... Read More about Molybdenum isotope behaviour in groundwaters and terrestrial hydrothermal systems, Iceland.

Mountain glaciation drives rapid oxidation of rock-bound organic carbon (2017)
Journal Article
Horan, K., Hilton, R., Selby, D., Ottley, C., Gröcke, D., Hicks, M., & Burton, K. (2017). Mountain glaciation drives rapid oxidation of rock-bound organic carbon. Science Advances, 3(10), Article e1701107. https://doi.org/10.1126/sciadv.1701107

Over millions of years, the oxidation of organic carbon contained within sedimentary rocks is one of the main sources of carbon dioxide to the atmosphere, yet the controls on this emission remain poorly constrained. We use rhenium to track the oxidat... Read More about Mountain glaciation drives rapid oxidation of rock-bound organic carbon.

Stable strontium isotopic heterogeneity in the solar system from double-spike data (2017)
Journal Article
Charlier, B., Parkinson, I., Burton, K., Grady, M., Wilson, C., & Smith, E. (2017). Stable strontium isotopic heterogeneity in the solar system from double-spike data. Geochemical perspectives letters, 4, 35-40. https://doi.org/10.7185/geochemlet.1733

Strontium isotopic anomalies in meteorites are important in assessing nucleosynthetic sources to, and measuring the timing of, early solar system processes. However, conventional use of a constant 88Sr/86Sr value in correcting for instrumental mass f... Read More about Stable strontium isotopic heterogeneity in the solar system from double-spike data.

Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands (2017)
Journal Article
Opfergelt, S., Williams, H., Cornelis, J., Guicharnaud, R., Georg, R., Siebert, C., …Burton, K. (2017). Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands. Geochimica et Cosmochimica Acta, 217, 273-291. https://doi.org/10.1016/j.gca.2017.08.033

Incipient warming of peatlands at high latitudes is expected to modify soil drainage and hence the redox conditions, which has implications for Fe export from soils. This study uses Fe isotopes to assess the processes controlling Fe export in a range... Read More about Iron and silicon isotope behaviour accompanying weathering in Icelandic soils, and the implications for iron export from peatlands.

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