All Outputs (38)

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., Fellows, S. M., Reijmer, J. J. G., McClymont, E., Billing, I., Matthews, A., & 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.

Removal and recovery of vanadium from alkaline steel slag leachates with anion exchange resins (2016)
Journal Article
Gomes, H. I., Jones, A., Rogerson, M., Greenway, G. M., Lisbona, D. F., Burke, I. T., & Mayes, W. M. (2017). Removal and recovery of vanadium from alkaline steel slag leachates with anion exchange resins. Journal of environmental management, 187, 384-392. https://doi.org/10.1016/j.jenvman.2016.10.063

© 2016 The Author(s) Leachable vanadium (V) from steel production residues poses a potential environmental hazard due to its mobility and toxicity under the highly alkaline pH conditions that characterise these leachates. This work aims to test the e... Read More about Removal and recovery of vanadium from alkaline steel slag leachates with anion exchange resins.

Timing and causes of North African wet phases during the last glacial period and implications for modern human migration (2016)
Journal Article
Hoffmann, D. L., Rogerson, M., Spötl, C., Luetscher, M., Vance, D., Osborne, A. H., Fello, N. M., & Moseley, G. E. (2016). Timing and causes of North African wet phases during the last glacial period and implications for modern human migration. Scientific reports, 6(1), Article ARTN 36367. https://doi.org/10.1038/srep36367

We present the first speleothem-derived central North Africa rainfall record for the last glacial period. The record reveals three main wet periods at 65-61 ka, 52.5-50.5 ka and 37.5-33 ka that lead obliquity maxima and precession minima. We find add... Read More about Timing and causes of North African wet phases during the last glacial period and implications for modern human migration.

Vanadium removal and recovery from bauxite residue leachates by ion exchange (2016)
Journal Article
Gomes, H. I., Jones, A., Rogerson, M., Burke, I. T., & Mayes, W. M. (2016). Vanadium removal and recovery from bauxite residue leachates by ion exchange. Environmental science and pollution research, 23(22), 23034-23042. https://doi.org/10.1007/s11356-016-7514-3

Bauxite residue is an important by-product of the alumina industry, and current management practices do not allow their full valorisation, especially with regard to the recovery of critical metals. This work aims to test the efficiency of ion exchang... Read More about Vanadium removal and recovery from bauxite residue leachates by ion exchange.

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., Reijmer, J., Billing, I., & 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.

A test of the biogenicity criteria established for microfossils and stromatolites on quaternary tufa and speleothem materials formed in the “Twilight zone” at Caerwys, UK (2015)
Journal Article
Brasier, A. T., Rogerson, M. R., Mercedes-Martin, R., Vonhof, H. B., & Reijmer, J. J. G. (2015). A test of the biogenicity criteria established for microfossils and stromatolites on quaternary tufa and speleothem materials formed in the “Twilight zone” at Caerwys, UK. Astrobiology, 15(10), 883-900. https://doi.org/10.1089/ast.2015.1293

© 2015, Mary Ann Liebert, Inc. The ability to distinguish the features of a chemical sedimentary rock that can only be attributed to biology is a challenge relevant to both geobiology and astrobiology. This study aimed to test criteria for recognizin... Read More about A test of the biogenicity criteria established for microfossils and stromatolites on quaternary tufa and speleothem materials formed in the “Twilight zone” at Caerwys, UK.

Alkaline residues and the environment: a review of impacts, management practices and opportunities (2015)
Journal Article
Gomes, H. I., Mayes, W. M., Rogerson, M., Stewart, D. I., & Burke, I. T. (2016). Alkaline residues and the environment: a review of impacts, management practices and opportunities. Journal of cleaner production, 112(4), 3571-3582. https://doi.org/10.1016/j.jclepro.2015.09.111

Around two billion tonnes of alkaline residues are produced globally each year by industries such as steel production, alumina refining and coal-fired power generation, with a total production estimate of 90 billion tonnes since industrialisation. Th... Read More about Alkaline residues and the environment: a review of impacts, management practices and opportunities.

Zinc Uptake from Circumneutral Mine Drainage in Freshwater Biofilms: New Insights from In Vitro Experiments (2015)
Journal Article
Jones, A., Rogerson, M., Greenway, G., & Mayes, W. M. (2015). Zinc Uptake from Circumneutral Mine Drainage in Freshwater Biofilms: New Insights from In Vitro Experiments. Mine Water and the Environment, 34(3), 295-307. https://doi.org/10.1007/s10230-015-0325-9

© 2015, Springer-Verlag Berlin Heidelberg. We present results from in vitro flask and flume experiments using freshwater biofilms sourced and cultivated from a mine-impacted stream in North Yorkshire, UK. Flask experiments showed rapid uptake of Zn f... Read More about Zinc Uptake from Circumneutral Mine Drainage in Freshwater Biofilms: New Insights from In Vitro Experiments.

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.

Were rivers flowing across the Sahara during the last interglacial? Implications for human migration through Africa. (2013)
Journal Article
Coulthard, T. J., Ramirez, J. A., Barton, N., Rogerson, M., & Brücher, T. (2013). Were rivers flowing across the Sahara during the last interglacial? Implications for human migration through Africa. PLoS ONE, 8(9), 0-0. https://doi.org/10.1371/journal.pone.0074834

Human migration north through Africa is contentious. This paper uses a novel palaeohydrological and hydraulic modelling approach to test the hypothesis that under wetter climates c.100,000 years ago major river systems ran north across the Sahara to... Read More about Were rivers flowing across the Sahara during the last interglacial? Implications for human migration through Africa..

Mine water geochemistry and metal flux in a major historic Pb-Zn-F orefield, the Yorkshire Pennines, UK (2013)
Journal Article
Jones, A., Rogerson, M., Greenway, G., Potter, H. A., & Mayes, W. M. (2013). Mine water geochemistry and metal flux in a major historic Pb-Zn-F orefield, the Yorkshire Pennines, UK. Environmental science and pollution research, 20(11), 7570-7581. https://doi.org/10.1007/s11356-013-1513-4

Recent studies have shown up to 6 % of rivers in England and Wales to be impacted by discharges from abandoned metal mines. Despite the large extent of impacts, there are still many areas where mine water impact assessments are limited by data availa... Read More about Mine water geochemistry and metal flux in a major historic Pb-Zn-F orefield, the Yorkshire Pennines, UK.

Vertical density gradient in the eastern North Atlantic during the last 30,000 years (2011)
Journal Article
Rogerson, M., Bigg, G. R., Rohling, E. J., & Ramirez, J. (2012). Vertical density gradient in the eastern North Atlantic during the last 30,000 years. Climate Dynamics, 39(3-4), 589-598. https://doi.org/10.1007/s00382-011-1148-4

Past changes in the density and momentum structure of oceanic circulation are an important aspect of changes in the Atlantic Meridional Overturning Circulation and consequently climate. However, very little is known about past changes in the vertical... Read More about Vertical density gradient in the eastern North Atlantic during the last 30,000 years.

Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz (2010)
Journal Article
Rogerson, M., Schönfeld, J., & Leng, M. J. (2011). Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz. Marine Geology, 280(1-4), 150-167. https://doi.org/10.1016/j.margeo.2010.12.008

Palaeoceanography relies on the assumption that parameters measureable in sediment cores correlate reliably to hydrographic parameters. Areas of dynamic watermass mixing, which generally have steep hydrographic gradients, therefore provide both a tem... Read More about Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz.

A humid corridor across the Sahara for the migration of early modern humans out of Africa 120,000 years ago (2008)
Journal Article
Osborne, A. H., Vance, D., Rohling, E. J., Barton, N., Rogerson, M., & Fello, N. (2008). A humid corridor across the Sahara for the migration of early modern humans out of Africa 120,000 years ago. Proceedings of the National Academy of Sciences of the United States of America, 105(43), 16444-16447. https://doi.org/10.1073/pnas.0804472105

It is widely accepted that modern humans originated in sub-Saharan Africa ≈150-200 thousand years ago (ka), but their route of dispersal across the currently hyperarid Sahara remains controversial. Given that the first modern humans north of the Saha... Read More about A humid corridor across the Sahara for the migration of early modern humans out of Africa 120,000 years ago.

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.

A dynamic explanation for the origin of the western Mediterranean organic-rich layers (2008)
Journal Article
Rogerson, M., Cacho, I., Jimenez-Espejo, F., Reguera, M. I., Sierro, F. J., Martinez-Ruiz, F., Frigola, J., & Canals, M. (2008). A dynamic explanation for the origin of the western Mediterranean organic-rich layers. Geochemistry, Geophysics, Geosystems, 9(7), n/a-n/a. https://doi.org/10.1029/2007gc001936

The eastern Mediterranean sapropels are among the most intensively investigated phenomena in the paleoceanographic record, but relatively little has been written regarding the origin of the equivalent of the sapropels in the western Mediterranean, th... Read More about A dynamic explanation for the origin of the western Mediterranean organic-rich layers.