XRF iron (Fe) counts of ODP Hole 171-1050A and 171-1051A ...

• Main Authors: Röhl, Ursula, Norris, Richard D, Ogg, James G
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2003
• Subjects: Ocean Drilling Program ODP; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.816488; https://doi.pangaea.de/10.1594/PANGAEA.816488

Upper Paleocene to lower Eocene sediments drilled at Ocean Drilling Program (ODP) Site 1051 (Blake Nose, off Florida) display well-defined orbital cycles, a detailed magnetic stratigraphy, and a suite of planktonic foraminiferal datums. We derived a cyclostratigraphy by using spectral analysis of high-resolution records of elemental concentrations obtained by an X-ray fluorescence (XRF) Core Scanner. XRF counts of iron serve as a proxy for the relative amount of terrestrial material. Sliding-window spectral analysis, bandpass filtering, and direct counting of precession and obliquity cycles yield minimum durations for magnetic polarity chrons C22 to C26 (~49 to ~61 Ma), calculations of sediment accumulation rates, as well as constraints on the timing of biostratigraphic and climatological events in the vicinity of the Initial Eocene Thermal Maximum (IETM).Durations of polarity chrons as represented in sediments drilled at Site 1051 were estimated using a conservative assignment of 41 k.y. for obliquity ... : Supplement to: Röhl, Ursula; Norris, Richard D; Ogg, James G (2003): Cyclostratigraphy of upper Paleocene and late Eocene sediments at Blake Nose Site 1051 (western North Atlantic). In: Gingerich, P, Schmitz, B, Thomas, E, & Wing, S (eds.) Causes and Consequences of Globally Warm Climates in the Early Paleogene, Geological Society of America (GSA) Special Paper Series, 369, 567-588 ...