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doi:10.2204/iodp.proc.303306.208.2010

Introduction

Holes U1312A (42°50.2040′N, 23°5.2506′W; water depth = 3522 m) and U1312B (42°50.2150′N, 23°5.2652′W; water depth = 3523 m) were cored to reoccupy Deep Sea Drilling Project Hole 608 during Integrated Ocean Drilling Program Expedition 306 on the southern King’s Trough, which is located northeast of the Azores Islands (Fig. F1). A continuous paleoceanographic record at this site is fundamental to understanding Quaternary–Miocene sea-surface temperature (SST) temporal variations, which are needed to achieve the expedition objectives. Site U1312 occupies the key geographical position in this theme because the region between 40° and 50°N is considered to have been sensitive to SST changes in the North Atlantic through geologic time. One of the most important issues to be established in this project is construction of a detailed age model at a sub-Milankovitch scale. δ¹⁸O and relative paleomagnetic intensity (RPI) studies were assigned as stratigraphic templates for this purpose. We measured and analyzed the magnetization of sediments from Site U1312 to acquire paleomagnetic data and assess whether the quality of magnetic data is suitable for RPI study.

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