(Table 1) TOC content, BIT, TEX86 and UK'37 indices, and sea surface temperature reconstruction for the middle Miocene to Pliocene of ODP Hole 175-1085A ...

• Main Authors: Rommerskirchen, Florian, Condon, Tegan, Mollenhauer, Gesine, Dupont, Lydie M, Schefuß, Enno
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Sample code/label; Sample thickness; DEPTH, sediment/rock; Depth, composite; AGE; Carbon, organic, total; Alkenone, unsaturation index UK'37; Alkenone, unsaturation index UK37, standard deviation; Sea surface temperature, annual mean; Sea surface temperature, annual mean, standard deviation; Branched and isoprenoid tetraether index; Branched and isoprenoid tetraether index, standard deviation; Tetraether index of 86 carbon atoms; Tetraether index of 86 carbon atoms, standard deviation; Drilling/drill rig; DSDP/ODP/IODP sample designation; Intercore correlation; Element analyser CHN-O Rapid, Heraeus; High Performance Liquid Chromatography coupled mass spectrometer HPLC-MS; Calculated from UK'37 Müller et al, 1998; Calculated from TEX86 Kim et al., 2010; Leg175; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctic; Ice Sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.770426; https://doi.pangaea.de/10.1594/PANGAEA.770426

The initiation of the Benguela upwelling has been dated to the late Miocene, but estimates of its sea surface temperature evolution are not available. This study presents data from Ocean Drilling Program (ODP) Site 1085 recovered from the southern Cape Basin. Samples of the middle Miocene to Pliocene were analyzed for alkenone-based (UK'37, SSTUK) and glycerol dialkyl glycerol tetraether (GDGT) based (TEX86, TempTEX) water temperature proxies. In concordance with global cooling during the Miocene, SSTUK and TempTEX exhibit a decline of about 8°C and 16°C, respectively. The temperature trends suggest an inflow of cold Antarctic waters triggered by Antarctic ice sheet expansion and intensification of Southern Hemisphere southeasterly winds. A temperature offset between both proxies developed with the onset of upwelling, which can be explained by differences in habitat: alkenone-producing phytoplankton live in the euphotic zone and record sea surface temperatures, while GDGT-producing Thaumarchaeota are ... : Sediment depth is given in mbsf. Age is after Berger et al. (2002, doi:10.2973/odp.proc.sr.175.235.2002), Vidal et al. (2002, doi:10.1016/S0025-3227(01)00206-7), and Westerhold et al. (2005, doi:10.1016/j.palaeo.2004.12.001). ...