Sam Royle Email & Phone Number

London, Gb

London, United Kingdom

Reserach Associate in organic matter and the minerals of Mars. Trying to find a work-around for the problem of carbon in organic matter oxidising when heated in the presence of various minerals during analysis by pyrolysis. In aid of improving the chances of detecting organic matter on Mars.

Thesis title: THE CORAL CLADOCORA CAESPITOSA AS A HIGH RESOLUTION PALAEOCLIMATE ARCHIVEAbstract: High resolution proxy data (stable isotopes, trace elements) from coral skeletons is an established method to reconstruct seawater growth temperatures for palaeoenvironmental studies. In this work the temperate, colonial, Mediterranean scleractinian coral Cladocora caespitosa was investigated. First modern Adriatic corals from Mljet (Croatia) where growth temperatures were known were studied. A clear sinusoidal cyclicity is present in both the δ18O and trace element (Sr, Mg, U, etc.) composition of the modern coral skeletons. Cyclicity approximately matches the number of seasonal growth band pairs in each corallite, implying a genetic link between these cycles and factors that determine seasonal growth band development, in this case mainly water temperature. It is found that C. caespitosa do not calcify in equilibrium with seawater in respect to any of the proxies analysed. Much intra-site variation is observed in trace element composition between coral colonies so this is not useful for production of a reliable palaeothermometer. For δ18O and ∆47 however, the offset, from what would be expected for aragonite precipitated in equilibrium with water, appears constant and so it was possible to derive a species-specific δ18O-temperature calibration equation, although more work needs to be done on ∆47. The δ18O-temperature calibration equation was applied to well-preserved corals collected from late Pleistocene deposits, MIS 1, 5, 7, in central Greece. The fossils contain ‘similar to modern’ δ18O values and variability in all proxies preserving growth environment seasonal signatures. MIS 5e, which has the best supporting contextual palaeoclimatic information, was found to be the warmest period studied with a lower than modern seasonal temperature range.

Working on new research on the level of disequilibrium in clumped isotope composition of corals and pecten. Finishing off papers related to my PhD thesis.

Doctor Of Philosophy - Phd, Geochemistry

Activities and Societies: Fell and Mountaineering Club Climbing ClubThesis title: THE CORAL CLADOCORA CAESPITOSA AS A HIGH RESOLUTION.

Combined Bachelors (Hon.S) And Masters Of Earth Science (M.Esci.), Geology, First

4 year Geology degree with combined Bachelors with honours (Geological Society of London accredited). Course covered all aspects.

Education record