(Table 1) δ¹⁸O of interstitial waters at DSDP Sites 87-582, 87-583, and 87-584@en

In the present paper, we report preliminary results on the 18O/16O ratios of the interstitial waters of the DSDP cores taken from subduction-related trenches near Japan: Sites 582 and 583 at the Nankai Trough off southwestern Japan, and Site 584 at the Japan Trench off northern Honshu, where thick piles of young sediments have accumulated. Special attention was paid to any differences in isotopic behavior of interstitial waters with different surrounding lithoiogy, the details of isotopic variation of interstitial waters in young, unconsolidated sediments, and the effects of sedimentary structural disturbance on interstitial waters.本研究报道了取自日本附近俯冲相关海沟的深海钻探计划（Deep Sea Drilling Project, DSDP）岩芯孔隙水的¹⁸O/¹⁶O比值初步结果，所涉岩芯来自两处海沟：位于日本西南近海南海海沟的582号和583号钻探站位，以及本州北部近海日本海沟的584号钻探站位，上述区域均堆积有厚层年轻沉积物。本研究特别关注了不同围岩岩性条件下孔隙水的同位素行为差异、年轻未固结沉积物中孔隙水同位素变化的细节，以及沉积构造扰动对孔隙水的影响。