(Table T2) Remanent anomaly and Koenigsberger ratio of ODP holes ...

• Main Authors: Williams, Trevor J, Louvel, Véronique, Lauer-Leredde, C
• Format: Dataset
• Language: English
• Published: PANGAEA 2002
• Subjects: Event label; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Petrography description; Remanent anomaly; Remanent anomaly, standard deviation; Koenigsberger ratio; Drilling/drill rig; Leg145; Leg162; Leg178; Leg188; Joides Resolution; Ocean Drilling Program ODP; Antarctic; The Antarctic; Antarctic Peninsula; Ramsay; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.142421; https://doi.pangaea.de/10.1594/PANGAEA.142421

Magnetic field strength and magnetic susceptibility were logged with the geological high-resolution magnetic tool (GHMT) at three of the holes drilled during Ocean Drilling Program Leg 178 to the west of the Antarctic Peninsula. Polarity stratigraphies derived from the GHMT logs bear close resemblance to the polarities determined from core paleomagnetism at two of the holes and were used for magnetostratigraphic dating, especially in intervals where no core was recovered.Polarity is determined in the following way. First, the susceptibility log is used to determine the induced magnetization of the sediment. Then the background field, the field of the metal drill pipe, and the field anomaly of the sediment's induced magnetization are removed from the measured total field to leave the downhole anomaly of the sediment's remanent magnetization. The sign (positive or negative) of this anomaly gave a good polarity stratigraphy for Holes 1095B and 1096C, which are located in sediment drifts. A further step, ... : Supplement to: Williams, Trevor J; Louvel, Véronique; Lauer-Leredde, C (2002): Magnetic polarity stratigraphy from downhole logs, West Antarctic Peninsula, ODP Leg 178. In: Barker, PF; Camerlenghi, A; Acton, GD; Ramsay, ATS (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 178, 1-23 ...