PAIRED ORGANIC AND CARBONATE CARBON ISOTOPE CHEMOSTRATIGRAPHY OF THE MULDE EXCURSION FROM THE ALTAJME CORE, GOTLAND, SWEDEN
To test this synchronicity, a core (Altajme) was drilled from the Swedish island of Gotland that contains more than 180 meters of Homerian strata. Over 300 samples were taken for organic carbon isotope analysis for this project and compared with greater than 500 carbonate carbon samples from the same core. This provided the ability to demonstrate small scale variations in the onset and end of the Mulde positive carbon isotope excursion at the highest resolution ever produced for this interval. What was demonstrated is that there is indeed a small offset in the onset of the excursion in the carbonate versus organic carbon isotope records, indicating they are not precisely synchronous. The ∆13C record also demonstrates a series of transitions during the first peak of the Mulde Excursion. In order to determine if these are global signals, additional data at similar resolution from other sections will be required.