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A depositional model for spherulitic carbonates associated with alkaline, volcanic lakes (2017)
Journal Article
Mercedes-Martín, R., Brasier, A. T., Rogerson, M., Reijmer, J. J., Vonhof, H., & Pedley, M. (2017). A depositional model for spherulitic carbonates associated with alkaline, volcanic lakes. Marine and Petroleum Geology, 86, 168-191. https://doi.org/10.1016/j.marpetgeo.2017.05.032

The South Atlantic Aptian ‘Pre-salt’ reservoirs are formed by a combination of spherulitic carbonates and Mg-rich clays accumulated in volcanic alkaline lake settings with exotic chemistries. So far, outcrop analogues characterised by metre-thick suc... Read More about A depositional model for spherulitic carbonates associated with alkaline, volcanic lakes.

Are spherulitic lacustrine carbonates an expression of large-scale mineral carbonation? A case study from the East Kirkton Limestone, Scotland (2017)
Journal Article
Rogerson, M., Mercedes Martín, R., Brasier, A. T., McGill, R. A. R., Prior, T. J., Vonhof, H., …Pedley, H. M. (2017). Are spherulitic lacustrine carbonates an expression of large-scale mineral carbonation? A case study from the East Kirkton Limestone, Scotland. Gondwana Research, 48, 101-109. https://doi.org/10.1016/j.gr.2017.04.007

Lacustrine carbonate deposits with spherulitic facies are poorly understood, but are key to understanding the economically important “Pre-Salt” Mesozoic strata of the South Atlantic. A major barrier to research into these unique and spectacular facie... Read More about Are spherulitic lacustrine carbonates an expression of large-scale mineral carbonation? A case study from the East Kirkton Limestone, Scotland.

Growing spherulitic calcite grains in saline, hyperalkaline lakes: experimental evaluation of the effects of Mg-clays and organic acids (2016)
Journal Article
Mercedes-Martín, R., Rogerson, M., Brasier, A., Vonhof, H., Prior, T., Fellows, S., …Pedley, H. (2016). Growing spherulitic calcite grains in saline, hyperalkaline lakes: experimental evaluation of the effects of Mg-clays and organic acids. Sedimentary Geology, 335, 93-102. https://doi.org/10.1016/j.sedgeo.2016.02.008

The origin of spherical-radial calcite bodies - spherulites - in sublacustrine, hyperalkaline and saline systems is unclear, and therefore their palaeoenvironmental significance as allochems is disputed. Here, we experimentally investigate two hypoth... Read More about Growing spherulitic calcite grains in saline, hyperalkaline lakes: experimental evaluation of the effects of Mg-clays and organic acids.

Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects (2014)
Journal Article
Saunders, P., Rogerson, M., Wadhawan, J., Greenway, G., & Pedley, H. (2014). Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects. Geochimica et cosmochimica acta, 147, 107-118. https://doi.org/10.1016/j.gca.2014.10.014

The ratio of magnesium to calcium (Mg/Ca) in carbonate minerals in an abiotic setting is conventionally assumed to be predominantly controlled by (Mg/Ca)solution and a temperature dependant partition coefficient. This temperature dependence suggests... Read More about Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects.

Linking mineralisation process and sedimentary product in terrestrial carbonates using a solution thermodynamic approach (2014)
Journal Article
Rogerson, M., Pedley, H. M., Kelham, A., & Wadhawan, J. D. (2014). Linking mineralisation process and sedimentary product in terrestrial carbonates using a solution thermodynamic approach. Earth surface dynamics European Geosciences Union, 2(1), 197-216. https://doi.org/10.5194/esurf-2-197-2014

Determining the processes which generate terrestrial carbonate deposits (tufas, travertines and to a lesser extent associated chemical sediments such as calcretes and speleothems) is a long-standing problem. Precipitation of mineral products from sol... Read More about Linking mineralisation process and sedimentary product in terrestrial carbonates using a solution thermodynamic approach.

New insights into biological influence on the geochemistry of freshwater carbonate deposits (2008)
Journal Article
Rogerson, M., Pedley, H. M., Wadhawan, J. D., & Middleton, R. (2008). New insights into biological influence on the geochemistry of freshwater carbonate deposits. Geochimica et cosmochimica acta, 72(20), 4976-4987. https://doi.org/10.1016/j.gca.2008.06.030

Ambient temperature freshwater carbonates ("tufas") have outstanding potential as palaeoclimate archives. However, it has proven difficult to constrain the behaviour of the geochemical parameters on which important proxy systems rely. Current thinkin... Read More about New insights into biological influence on the geochemistry of freshwater carbonate deposits.