All Outputs (32)

Preliminary Characterization of Submarine Basalt Magnetic Mineralogy Using Amplitude-Dependence of Magnetic Susceptibility (2024)
Journal Article
Yang, H., Tikoo, S. M., Carvallo, C., Bilardello, D., Solheid, P., Gaastra, K. M., …Widdowson, M. (2024). Preliminary Characterization of Submarine Basalt Magnetic Mineralogy Using Amplitude-Dependence of Magnetic Susceptibility. Geochemistry, geophysics, geosystems G³, 25(2), Article e2023GC011222. https://doi.org/10.1029/2023GC011222

The past ∼200 million years of Earth's geomagnetic field behavior have been recorded within oceanic basalts, many of which are only accessible via scientific ocean drilling. Obtaining the best possible paleomagnetic measurements from such valuable sa... Read More about Preliminary Characterization of Submarine Basalt Magnetic Mineralogy Using Amplitude-Dependence of Magnetic Susceptibility.

3D Seismic reflection evidence for lower crustal intrusions beneath the Faroe–Shetland Basin, NE Atlantic Margin (2023)
Journal Article
Layfield, L. K., Schofield, N., Watson, D., Holford, S. P., Jolley, D. W., Kilhams, B. A., Muirhead, D. K., Roberts, A. M., Alvey, A. D., Ellwood, A., & Widdowson, M. (2023). 3D Seismic reflection evidence for lower crustal intrusions beneath the Faroe–Shetland Basin, NE Atlantic Margin. Journal of the Geological Society, 180(5), Article jgs2022-172. https://doi.org/10.1144/jgs2022-172

Lower crustal intrusion is considered to be a common process along volcanic or magma-rich passive margins, including the NE Atlantic Margin, where it is thought to have occurred during phases of Paleogene magmatism, both prior to and during continent... Read More about 3D Seismic reflection evidence for lower crustal intrusions beneath the Faroe–Shetland Basin, NE Atlantic Margin.

Relicts of Neo-Tethyan mantle wedge in the Indo-Burma Range, India: Record of carbonate metasomatism and Neo-Tethyan mantle evolution (2023)
Journal Article
Kingson, O., Liu, Y., Bhutani, R., & Widdowson, M. (in press). Relicts of Neo-Tethyan mantle wedge in the Indo-Burma Range, India: Record of carbonate metasomatism and Neo-Tethyan mantle evolution. Results in Earth Sciences, Article 100001. https://doi.org/10.1016/j.rines.2023.100001

Several different geochemical signatures, i.e., mid-oceanic ridge (MOR) and supra subduction zone (SSZ), are frequently reported from ophiolite belts. Such bi-modal geochemical signatures are generally interpreted in terms of formation in two contras... Read More about Relicts of Neo-Tethyan mantle wedge in the Indo-Burma Range, India: Record of carbonate metasomatism and Neo-Tethyan mantle evolution.

Expedition 391 Preliminary Report : Walvis Ridge Hotspot: drilling Walvis Ridge, Southeast Atlantic Ocean, to test models of ridge hotspot interaction, isotopic zonation, and the hotspot reference frame (2022)
Report
Widdowson, M., Sager, W., Hoernle, K., Höfig, T. W., Avery, A. J., Bhutani, R., …Tshiningayamwe, M. (2022). Expedition 391 Preliminary Report : Walvis Ridge Hotspot: drilling Walvis Ridge, Southeast Atlantic Ocean, to test models of ridge hotspot interaction, isotopic zonation, and the hotspot reference frame. International Ocean Discovery Program (IODP)

Hotspot tracks (quasilinear chains of seamounts, ridges, and other volcanic structures) provide important records of plate motions, as well as mantle geodynamics, magma flux, and mantle source compositions. The Tristan-Gough-Walvis Ridge (TGW) hotspo... Read More about Expedition 391 Preliminary Report : Walvis Ridge Hotspot: drilling Walvis Ridge, Southeast Atlantic Ocean, to test models of ridge hotspot interaction, isotopic zonation, and the hotspot reference frame.

New mammals from the Naskal intertrappean site and the age of India's earliest eutherians (2022)
Journal Article
Wilson Mantilla, G. P., Renne, P. R., Samant, B., Mohabey, D. M., Dhobale, A., Tholt, A. J., …Wilson Mantilla, J. A. (2022). New mammals from the Naskal intertrappean site and the age of India's earliest eutherians. Palaeogeography, palaeoclimatology, palaeoecology, 591, Article 110857. https://doi.org/10.1016/j.palaeo.2022.110857

The first Cretaceous mammals described from India were recovered from the Naskal locality, on the southeastern edge of the Deccan Traps Volcanic Province (DTVP), where it is preserved between two basalt flows. Because the DTVP eruptions spanned the C... Read More about New mammals from the Naskal intertrappean site and the age of India's earliest eutherians.

New early oligocene zircon U-Pb dates for the ‘Miocene’ Wenshan Basin, Yunnan, China: Biodiversity and paleoenvironment (2021)
Journal Article
Tian, Y., Spicer, R. A., Huang, J., Zhou, Z., Su, T., Widdowson, M., …Zhang, S. (2021). New early oligocene zircon U-Pb dates for the ‘Miocene’ Wenshan Basin, Yunnan, China: Biodiversity and paleoenvironment. Earth and planetary science letters, 565, Article 116929. https://doi.org/10.1016/j.epsl.2021.116929

The sedimentary basins of Yunnan, Southwest China, record detailed histories of Cenozoic paleoenvironmental change. They track regional tectonic and palaeobiological evolution, both of which are critically important for the development of modern flor... Read More about New early oligocene zircon U-Pb dates for the ‘Miocene’ Wenshan Basin, Yunnan, China: Biodiversity and paleoenvironment.

The role of pedogenesis and natural fertiliser as vectors for essential metal content in agricultural topsoils, Central India (2021)
Journal Article
Suhr, N., Widdowson, M., & Kamber, B. S. (2021). The role of pedogenesis and natural fertiliser as vectors for essential metal content in agricultural topsoils, Central India. SN Applied Sciences, 3(1), Article 40. https://doi.org/10.1007/s42452-020-03982-7

© 2021, The Author(s). Essential trace metals are well known for their environmental toxicity and for being part of complex bio-chemical cycles. Their role as critical micronutrients, delivering vital health benefits, is less widely discussed and und... Read More about The role of pedogenesis and natural fertiliser as vectors for essential metal content in agricultural topsoils, Central India.

A Middle Eocene lowland humid subtropical "Shangri-La" ecosystem in central Tibet (2020)
Journal Article
Su, T., Spicer, R. A., Wu, F. X., Farnsworth, A., Huang, J., Del Rio, C., Deng, T., Ding, L., Deng, W. Y. D., Huang, Y. J., Hughes, A., Jia, L. B., Jin, J. H., Li, S. F., Liang, S. Q., Liu, J., Liu, X. Y., Sherlock, S., Spicer, T., Srivastava, G., …Zhou, Z. K. (2020). A Middle Eocene lowland humid subtropical "Shangri-La" ecosystem in central Tibet. Proceedings of the National Academy of Sciences of the United States of America, 117(52), 32989-32995. https://doi.org/10.1073/pnas.2012647117

Copyright © 2020 the Author(s). Published by PNAS. Tibet's ancient topography and its role in climatic and biotic evolution remain speculative due to a paucity of quantitative surface-height measurements through time and space, and sparse fossil reco... Read More about A Middle Eocene lowland humid subtropical "Shangri-La" ecosystem in central Tibet.

The composition of the middle Miocene (15 Ma) Namling paleoflora, South Central Tibet, in the context of other Tibetan and Himalayan Floras (2019)
Journal Article
Shuang-Xing, G., Spicer, R. A., Widdowson, M., Herman, A. B., & Domogatskaya, K. V. (2019). The composition of the middle Miocene (15 Ma) Namling paleoflora, South Central Tibet, in the context of other Tibetan and Himalayan Floras. Review of palaeobotany and palynology, 271, Article 104088. https://doi.org/10.1016/j.revpalbo.2019.06.011

Molecular phylogeneticists often find that a diversification of western Chinese plant taxa took place in the Miocene and link this to the Neogene uplift of the Tibetan Plateau. This link is made despite abundant geological evidence showing that a hig... Read More about The composition of the middle Miocene (15 Ma) Namling paleoflora, South Central Tibet, in the context of other Tibetan and Himalayan Floras.

Cu and Zn isotope fractionation during extreme chemical weathering (2019)
Journal Article
Little, S. H., Munson, S., Prytulak, J., Coles, B. J., Hammond, S. J., & Widdowson, M. (2019). Cu and Zn isotope fractionation during extreme chemical weathering. Geochimica et cosmochimica acta, 263, 85-107. https://doi.org/10.1016/j.gca.2019.07.057

Copper and Zn are trace metal micronutrients whose stable isotope systematics are receiving increasing attention as possible paleoenvironmental tracers. However, to realise this potential, their behaviour during chemical weathering must be better con... Read More about Cu and Zn isotope fractionation during extreme chemical weathering.

Mercury chemostratigraphy across the Cambrian Series 2 – Series 3 boundary: evidence for increased volcanic activity coincident with extinction? (2019)
Journal Article
Faggetter, L. E., Wignall, P. B., Pruss, S. B., Jones, D. S., Grasby, S., Widdowson, M., & Newton, R. J. (2019). Mercury chemostratigraphy across the Cambrian Series 2 – Series 3 boundary: evidence for increased volcanic activity coincident with extinction?. Chemical Geology, 510, 188-199. https://doi.org/10.1016/j.chemgeo.2019.02.006

Flood basalt volcanism represented by the Kalkarindji Province (Australia) is temporally associated with a trilobite mass extinction at the Cambrian Series 2 – Series 3 boundary, providing one of the oldest potential links between volcanism and bioti... Read More about Mercury chemostratigraphy across the Cambrian Series 2 – Series 3 boundary: evidence for increased volcanic activity coincident with extinction?.

New 40Ar/39Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province (2018)
Journal Article
Marshall, P. E., Halton, A. M., Kelley, S. P., Widdowson, M., & Sherlock, S. C. (2018). New 40Ar/39Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province. Journal of the Geological Society, 175(6), 974-985. https://doi.org/10.1144/jgs2018-035

The Kalkarindji flood basalt province of northern Australia erupted in the mid-Cambrian. Today, the province consists of scattered volcanic and intrusive suites, the largest being the Antrim Plateau Volcanics (APV) in Northern Territory. Accurate dat... Read More about New 40Ar/39Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province.

Thallium concentration and thallium isotope composition of lateritic terrains (2018)
Journal Article
Howarth, S., Prytulak, J., Little, S. H., Hammond, S. J., & Widdowson, M. (2018). Thallium concentration and thallium isotope composition of lateritic terrains. Geochimica et cosmochimica acta, 239, 446-462. https://doi.org/10.1016/j.gca.2018.04.017

Continental weathering plays a key role in modifying the geochemical budget of terrestrial reservoirs. Laterites are the products of extreme sub-aerial continental weathering. This study presents the first investigation of thallium (Tl) abundances an... Read More about Thallium concentration and thallium isotope composition of lateritic terrains.

Th/U and U series systematics of saprolite: importance for the oceanic 234U excess (2018)
Journal Article
Suhr, N., Widdowson, M., McDermott, F., & Kamber, B. S. (2018). Th/U and U series systematics of saprolite: importance for the oceanic 234U excess. Geochemical Perspectives Letters, 6, 17-22. https://doi.org/10.7185/geochemlet.1803

The presence of excess 234U in seawater is a compelling argument for active delivery of solutes from the continents to the oceans. Previous studies found, however, that the complementary 234U deficit on the continents is surprisingly modest, which wo... Read More about Th/U and U series systematics of saprolite: importance for the oceanic 234U excess.

Elemental and isotopic behaviour of Zn in Deccan basalt weathering profiles: Chemical weathering from bedrock to laterite and links to Zn deficiency in tropical soils (2017)
Journal Article
Suhr, N., Schoenberg, R., Chew, D., Rosca, C., Widdowson, M., & Kamber, B. S. (2018). Elemental and isotopic behaviour of Zn in Deccan basalt weathering profiles: Chemical weathering from bedrock to laterite and links to Zn deficiency in tropical soils. The Science of the total environment, 619-620, 1451-1463. https://doi.org/10.1016/j.scitotenv.2017.11.112

Zinc (Zn) is a micronutrient for organisms and essential for plant growth, therefore knowledge of its elemental cycling in the surface environment is important regarding wider aspects of human nutrition and health. To explore the nature of Zn cycling... Read More about Elemental and isotopic behaviour of Zn in Deccan basalt weathering profiles: Chemical weathering from bedrock to laterite and links to Zn deficiency in tropical soils.

Silicon and chromium stable isotopic systematics during basalt weathering and lateritisation: A comparison of variably weathered basalt profiles in the Deccan Traps, India (2017)
Journal Article
Wille, M., Babechuk, M. G., Kleinhanns, I. C., Stegmaier, J., Suhr, N., Widdowson, M., Kamber, B. S., & Schoenberg, R. (2018). Silicon and chromium stable isotopic systematics during basalt weathering and lateritisation: A comparison of variably weathered basalt profiles in the Deccan Traps, India. Geoderma, 314, 190-204. https://doi.org/10.1016/j.geoderma.2017.10.051

Global biomass production is fundamentally affected by the hydrological cycling of elements at the Earth's surface. Continental weathering processes are the major source for most bio-essential elements in marine environments and therefore affect prim... Read More about Silicon and chromium stable isotopic systematics during basalt weathering and lateritisation: A comparison of variably weathered basalt profiles in the Deccan Traps, India.

Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland (2016)
Journal Article
FAGGETTER, L. E., WIGNALL, P. B., PRUSS, S. B., RAINE, R. J., NEWTON, R. J., JOACHIMSKI, M. M., SMITH, P. M., WIDDOWSON, M., Faggetter, L., Joachimski, M., Pruss, S., Raine, R., Smith, P., SUN, Y., & Wignall, P. B. (2018). Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland. Geological magazine, 155(04), 1-13. https://doi.org/10.1017/s0016756816000947

Globally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions. Here we examine the sedimentology, sequence stratigraphy and carbon isotope record of this... Read More about Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland.

Submarine palaeoenvironments during Emeishan flood basalt volcanism, SW China: Implications for plume-lithosphere interaction during the Capitanian, Middle Permian ('end Guadalupian') extinction event (2015)
Journal Article
Jerram, D. A., Widdowson, M., Wignall, P. B., Sun, Y., Lai, X., Bond, D. P., & Torsvik, T. H. (2016). Submarine palaeoenvironments during Emeishan flood basalt volcanism, SW China: Implications for plume-lithosphere interaction during the Capitanian, Middle Permian ('end Guadalupian') extinction event. Palaeogeography, palaeoclimatology, palaeoecology, 441(1), 65-73. https://doi.org/10.1016/j.palaeo.2015.06.009

Plume-induced lithospheric uplift and erosion are widely regarded as key features of large igneous province (LIP) emplacement, as is the coincidence of LIP eruption with major extinction and oceanic anoxic events (OAE). The Emeishan LIP, which erupte... Read More about Submarine palaeoenvironments during Emeishan flood basalt volcanism, SW China: Implications for plume-lithosphere interaction during the Capitanian, Middle Permian ('end Guadalupian') extinction event.

The Giant Lavas of Kalkarindji: Rubbly pāhoehoe lava in an ancient continental flood basalt province (2015)
Journal Article
Marshall, P. E., Widdowson, M., & Murphy, D. T. (2016). The Giant Lavas of Kalkarindji: Rubbly pāhoehoe lava in an ancient continental flood basalt province. Palaeogeography, palaeoclimatology, palaeoecology, 441(1), 22-37. https://doi.org/10.1016/j.palaeo.2015.05.006

The Kalkarindji continental flood basalt province of northern Australia erupted in the mid Cambrian (c. 511-505Ma). It now consists of scattered basaltic lava fields, the most extensive being the Antrim Plateau Volcanics (APV) - a semi-continuous out... Read More about The Giant Lavas of Kalkarindji: Rubbly pāhoehoe lava in an ancient continental flood basalt province.

The early Danian hyperthermal event at Boltysh (Ukraine): Relation to Cretaceous-Paleogene boundary events (2014)
Book Chapter
Gilmour, I., Jolley, D., Kemp, D., Kelley, S., Gilmour, M., Daly, R., & Widdowson, M. (2014). The early Danian hyperthermal event at Boltysh (Ukraine): Relation to Cretaceous-Paleogene boundary events. In G. Keller, & A. C. Kerr (Eds.), Volcanism, Impacts, and Mass Extinctions: Causes and Effects (133-146). Geological Society of America. https://doi.org/10.1130/2014.2505%2806%29

The Boltysh meteorite impact crater formed in the Ukrainian Shield on the margin of the Tethys Ocean a few thousand years before the Cretaceous-Paleogene boundary and was rapidly filled by a freshwater lake. Sediments filling the lake vary from early... Read More about The early Danian hyperthermal event at Boltysh (Ukraine): Relation to Cretaceous-Paleogene boundary events.