Organic carbon burial in the Songliao paleo-lake facilitated global climate cooling during the early Late Cretaceous

These are supplementary tables for the paper "The organic carbon burial in the Songliao Paleo-lake promoted the global cooling in the early period of the Late Cretaceous" by Zhang et al. (2025).<b>Table S1</b> includes coordinates for 120 drilling sites used in this study.<b>Table S2</b> presents the evaluation of lower (25th percentile), median (50th percentile), and upper (75th percentile) values of total organic carbon (TOC), stratigraphic thickness, shale/mudstone proportion, thermal maturity (Ro), and organic richness (K).<b>Table S3</b> includes the lower (25th percentile) estimates of mass accumulation rate (MAR) values for the Quantou Member 4, Qingshankou Member 1, Qingshankou Members 2–3, Yaojia Member 1, Yaojia Members 2–3, Nenjiang Member 1, and Nenjiang Member 2.<b>Table S4</b> includes the median (50th percentile) estimates of MAR values for the same stratigraphic intervals.<b>Table S5</b> includes the upper (75th percentile) estimates of MAR values for the same stratigraphic intervals.<b>Table S6</b> summarizes the lower, median, and upper estimates of organic carbon burial rates and atmospheric pCO₂ sequestration rates in the Early Late Cretaceous Songliao paleo-lake.<b>Table S7</b> provides the stratigraphic time framework adopted in this study.<b>Table S8</b> compiles TOC, δ¹³C, and δ¹⁸O data from the SK1-s borehole, along with global marine δ¹³C and δ¹⁸O reference records.

本数据集为Zhang等人（2025）发表的论文《松辽古湖有机碳埋藏促进晚白垩世早期全球降温》的补充附表。补充表S1包含本研究所用120个钻探点位的坐标信息。补充表S2展示了总有机碳（total organic carbon, TOC）、地层厚度、页岩/泥岩占比、热成熟度（Ro）以及有机质丰度（K）的下四分位数（25th百分位）、中位数（50th百分位）和上四分位数（75th百分位）统计值。补充表S3包含泉头组四段、青山口组一段、青山口组二-三段、姚家组一段、姚家组二-三段、嫩江组一段以及嫩江组二段的质量堆积速率（mass accumulation rate, MAR）下四分位数估算值。补充表S4给出了上述同一地层单元的MAR值中位数估算结果。补充表S5提供了上述地层单元的MAR值上四分位数估算结果。补充表S6汇总了晚白垩世早期松辽古湖的有机碳埋藏速率以及大气CO₂分压（atmospheric pCO₂）固存速率的下、中、上三分位数估算结果。补充表S7给出了本研究采用的地层年代框架。补充表S8整合了SK1-s钻孔的总有机碳、碳同位素δ¹³C及氧同位素δ¹⁸O数据，同时附带全球海相δ¹³C与δ¹⁸O参考记录。