All Outputs (28)

A combined Y/Ho, high field strength element (HFSE) and Nd isotope perspective on basalt weathering, Deccan Traps, India (2014)
Journal Article
Babechuk, M. G., Widdowson, M., Murphy, M., & Kamber, B. S. (2015). A combined Y/Ho, high field strength element (HFSE) and Nd isotope perspective on basalt weathering, Deccan Traps, India. Chemical Geology, 396, 25-41. https://doi.org/10.1016/j.chemgeo.2014.12.017

High-precision high field strength element (HFSE: Zr, Hf, Nb, Ta, Th, U, W, Mo), Y/Ho, and Nd isotope chemostratigraphy of two contrasting Deccan Traps weathering profiles - an ancient, deeply weathered laterite, and a younger (Quaternary), more mode... Read More about A combined Y/Ho, high field strength element (HFSE) and Nd isotope perspective on basalt weathering, Deccan Traps, India.

A common parentage for Deccan Continental Flood Basalt and Central Indian Ocean Ridge Basalt? A geochemical and isotopic approach (2013)
Journal Article
Ray, D., Misra, S., Widdowson, M., & Langmuir, C. H. (2014). A common parentage for Deccan Continental Flood Basalt and Central Indian Ocean Ridge Basalt? A geochemical and isotopic approach. Journal of Asian Earth Sciences, 84, 188-200. https://doi.org/10.1016/j.jseaes.2013.12.015

A comparison of geochemical and Sr-Nd-Pb isotopic compositions for Deccan Continental Flood Basalts (CFBs) and Central Indian Ridge (CIR) Basalts is presented: these data permit assessment of possible parental linkages between the two regions, and co... Read More about A common parentage for Deccan Continental Flood Basalt and Central Indian Ocean Ridge Basalt? A geochemical and isotopic approach.

Quantifying chemical weathering intensity and trace element release from two contrasting basalt profiles, Deccan Traps, India (2013)
Journal Article
Babechuk, M. G., Widdowson, M., & Kamber, B. S. (2014). Quantifying chemical weathering intensity and trace element release from two contrasting basalt profiles, Deccan Traps, India. Chemical Geology, 363, 56-75. https://doi.org/10.1016/j.chemgeo.2013.10.027

Weathering profiles developed on basalt substrate contain information relevant to climate, atmospheric composition and evolution, nutrient release into the hydrosphere, and understanding Martian regolith. In this study, the chemical compositions of t... Read More about Quantifying chemical weathering intensity and trace element release from two contrasting basalt profiles, Deccan Traps, India.

An immense shield volcano within the Shatsky Rise oceanic plateau, northwest Pacific Ocean (2013)
Journal Article
Sager, W. W., Zhang, J., Korenaga, J., Sano, T., Koppers, A. A. P., Widdowson, M., & Mahoney, J. J. (2013). An immense shield volcano within the Shatsky Rise oceanic plateau, northwest Pacific Ocean. Nature Geoscience, 6(11), 976-981. https://doi.org/10.1038/ngeo1934

Most oceanic plateaux are massive basaltic volcanoes. However, the structure of these volcanoes, and how they erupt and evolve, is unclear, because they are remote and submerged beneath the oceans. Here we use multichannel seismic profiles and rock s... Read More about An immense shield volcano within the Shatsky Rise oceanic plateau, northwest Pacific Ocean.

Variety and origin of magmas on Shatsky Rise, northwest Pacific Ocean (2012)
Journal Article
Sano, T., Shimizu, K., Ishikawa, A., Senda, R., Chang, Q., Kimura, J. I., …Sager, W. W. (2012). Variety and origin of magmas on Shatsky Rise, northwest Pacific Ocean. Geochemistry, geophysics, geosystems G³, 13(8), Article Q08010. https://doi.org/10.1029/2012GC004235

Shatsky Rise consists of thick (∼30km maximum) basaltic crust with various geochemical compositions. Geochemistry data indicate that four magma types exist on the plateau; namely normal, low-Ti, high-Nb, and U1349 types. The normal type is the most a... Read More about Variety and origin of magmas on Shatsky Rise, northwest Pacific Ocean.

Response to Baksi, A., 2012, 'New 40Ar/ 39Ar dating of the Grande Ronde lavas, Columbia River Basalts, USA: Implications for duration of flood basalt eruption episodes' by Barry et al., 2010-Discussion' (2012)
Journal Article
Barry, T. L., Self, S., Kelley, S. P., Reidel, S., Hooper, P., & Widdowson, M. (2012). Response to Baksi, A., 2012, 'New 40Ar/ 39Ar dating of the Grande Ronde lavas, Columbia River Basalts, USA: Implications for duration of flood basalt eruption episodes' by Barry et al., 2010-Discussion'. Lithos, 146-147, 300-303. https://doi.org/10.1016/j.lithos.2012.04.011

Baksi (2012) claims that a number of radiometric ages presented in Barry et al. (2010) are statistically invalid and that many of the samples were altered, thus not able to date the eruptions, and that there is no compelling evidence for a limited du... Read More about Response to Baksi, A., 2012, 'New 40Ar/ 39Ar dating of the Grande Ronde lavas, Columbia River Basalts, USA: Implications for duration of flood basalt eruption episodes' by Barry et al., 2010-Discussion'.

Climate model predictions for the latest Cretaceous: An evaluation using climatically sensitive sediments as proxy indicators (2011)
Journal Article
Craggs, H. J., Valdes, P. J., & Widdowson, M. (2012). Climate model predictions for the latest Cretaceous: An evaluation using climatically sensitive sediments as proxy indicators. Palaeogeography, palaeoclimatology, palaeoecology, 315-316, 12-23. https://doi.org/10.1016/j.palaeo.2011.11.004

To date, many general circulation model (GCM) experiments have failed to reproduce the warm, high latitude temperatures suggested for the Cretaceous by geological proxy climate indicators, especially for the Northern Hemisphere and within continental... Read More about Climate model predictions for the latest Cretaceous: An evaluation using climatically sensitive sediments as proxy indicators.

Volcanism, mass extinction, and carbon isotope fluctuations in the Middle Permian of China (2009)
Journal Article
Wignall, P. B., Sun, Y., Bond, D. P. G., Izon, G., Newton, R. J., Védrine, S., …Bottrell, S. H. (2009). Volcanism, mass extinction, and carbon isotope fluctuations in the Middle Permian of China. Science, 324(5931), 1179-1182. https://doi.org/10.1126/science.1171956

The 260-million-year-old Emeishan volcanic province of southwest China overlies and is interbedded with Middle Permian carbonates that contain a record of the Guadalupian mass extinction. Sections in the region thus provide an opportunity to directly... Read More about Volcanism, mass extinction, and carbon isotope fluctuations in the Middle Permian of China.