(Table 1) Concentrations of CaCO3 and organic carbon, organic matter atomic C/N ratios and delta13C values of sediment samples from Site DSDP 594

CaCO3 and total organic carbon concentrations, organic matter C/N and carbon isotope ratios, and sediment accumulation rates in late Quaternary sediments from DSDP Site 594 provide information about glacial–interglacial variations in the delivery of organic matter to the Chatham Rise offshore of southeastern New Zealand. Low C/N ratios and nearly constant organic delta13C values of ?23‰ indicate that marine production dominates organic matter supply in both glacial and interglacial times during oxygen isotope stages 1 through 6 (0–140 ka) and 17 through 19 (660–790 ka). Increased organic carbon mass accumulation rates in isotope stages 2, 4, 6, and 18 record enhanced marine productivity during glacial maxima. Excursions of organic delta13C values to ca. ?29‰ in portions of isotope stage 2 suggest that the local concentration of dissolved CO2 was occasionally elevated during the last glacial maximum, probably as a result of short periods of lowered sea-surface temperature. Dilution of carbonates by clastic continental sediment generally increases at this location during glacial maxima, but enhanced delivery of land-derived organic matter does not accompany the increased accumulation of clastic sediments.

取自深海钻探计划（Deep Sea Drilling Project, DSDP）594站位的晚第四纪沉积物中，碳酸钙（CaCO₃）与总有机碳浓度、有机质碳氮比（C/N）及碳同位素比值，以及沉积物堆积速率，可为新西兰东南部近海查塔姆海隆（Chatham Rise）区域的有机质输入量的冰期-间冰期变化提供研究数据支撑。
在氧同位素阶段1至6（0~140 ka）与17至19（660~790 ka）期间，无论是冰期还是间冰期，较低的C/N比值以及近乎恒定的-23‰有机碳δ¹³C值均表明，海洋生产作用是该区域有机质供给的主导来源。
氧同位素阶段2、4、6与18期的有机碳质量堆积速率升高，记录了冰盛期海洋生产力的增强。
在氧同位素阶段2的部分层位中，有机碳δ¹³C值偏移至约-29‰，这表明末次冰盛期期间局部溶解二氧化碳浓度曾间歇性升高，其成因大概率为海表温度短期降低所引发。
冰盛期期间，该站位陆源碎屑沉积物对碳酸盐的稀释作用通常会增强，但陆源有机质的输入量并未随碎屑沉积物堆积量的增加而同步提升。