Paleogene carbon isotope excursions in the Bunkers Hill borehole: Hampshire Basin, UK |
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| Authors: | Emma Hodgson Stephen T Grimes Gregory D Price Meriel EJ Fitzpatrick Malcolm B Hart Melanie J Leng |
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| Institution: | aSchool of Geography, Earth and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, UK;bNERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, Nottingham NG12 5GG, UK |
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| Abstract: | This study demonstrates that the Bunkers Hill borehole, which is located within the Hampshire Basin, contains a carbon isotope excursion (CIE) in the Upnor Formation followed by a positive recovery from another CIE within the overlying Reading Formation. This study has also shown that the CIE in the Upnor Formation predates the Paleocene/Eocene Thermal Maximum (PETM), while the carbon isotope recovery at the base of the Reading Formation is most likely related to it. The positive carbon isotope trend, before a return to more negative values, seen throughout the majority of the Reading Formation can also be seen in coeval deposits in the Jubilee 404T borehole in the London Basin and in the Tienen Formation in the Doel and Kallo boreholes from the Belgium Basin. This indicates that this post-PETM carbon isotope signal may, therefore, be regional if not global in nature. |
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| Keywords: | Paleocene/Eocene Thermal Maximum Carbon isotopes Oxygen isotopes Climate change Palynology |
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