Biomarkers for understanding paleoclimate and organic matter inputs in the Southern Ocean ...
The opening of the Tasmanian Gateway around the Eocene/Oligocene boundary is a crucial evolution stage for the formation of the Antarctic Circumpolar Current, and plays a pivotal role in global ocean circulation, regional climate, and terrestrial vegetation variations. Multiple proxies such as micro...
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| Format: | Thesis |
| Language: | unknown |
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Macquarie University
2024
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| Online Access: | https://dx.doi.org/10.25949/26793580 https://figshare.mq.edu.au/articles/thesis/Biomarkers_for_understanding_paleoclimate_and_organic_matter_inputs_in_the_Southern_Ocean/26793580 |
| Summary: | The opening of the Tasmanian Gateway around the Eocene/Oligocene boundary is a crucial evolution stage for the formation of the Antarctic Circumpolar Current, and plays a pivotal role in global ocean circulation, regional climate, and terrestrial vegetation variations. Multiple proxies such as microfossils or terrestrial palynomorphs, have been used to study Paleogene tectonic, climatic, oceanographic, and vegetation evolution in the Tasmanian Gateway. However, except for glycerol dialkyl glycerol tetraethers (GDGTs) and alkenones, which contain water temperature information, biomarkers have rarely been studied in ODP Leg 189 samples. Nevertheless, they could provide useful information about organic matter input and depositional environment. This PhD thesis provides the first detailed organic geochemical analysis of hydrocarbons and biomarkers in four cores (1168, 1170, 1171, 1172) from the early Paleogene interval of Ocean Drilling Program (ODP) Leg 189 in the Tasmanian Gateway region to the south of ... |
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