Lake Towuti is located on central Sulawesi/Indonesia, within the Indo Pacific Warm Pool, a globally important region for atmospheric heat and moisture budgets. In 2015 the Towuti Drilling Project recovered more than 1000 m of drill core from the lake, along with downhole geophysical logging data from two drilling sites. The cores constitute the longest continuous lacustrine sediment succession from the Indo Pacific Warm Pool. We combined lithological descriptions with borehole logging data and used multivariate statistics to better understand the cyclic sequence, paleoenvironments, and geochronology of these sediments. Accurate chronologies are crucial to analyze and interpret paleoclimate records. Astronomical tuning can help build age-depth models and fill gaps between age control points. Cyclostratigraphic investigations were conducted on a downhole magnetic susceptibility log from the lacustrine facies (10–98 m below lake floor) from a continuous record of sediments in Lake Towuti. This study provides insights into the sedimentary history of the basin between radiometric ages derived from dating a tephra layer (~ 797 ka) and C¹⁴-ages (~ 45 ka) in the cores. We derived an age model that spans from late marine isotope stage (MIS) 23 to late MIS 6 (903 ± 11 to 131 ± 67 ka). Although uncertainties caused by the relatively short record and the small differences in the physical properties of sediments limited the efficacy of our approach, we suggest that eccentricity cycles and/or global glacial-interglacial climate variability were the main drivers of local variations in hydroclimate in central Indonesia. We generated the first nearly complete age-depth model for the lacustrine facies of Lake Towuti and examined the potential of geophysical downhole logging for time estimation and lithological description. Future lake drilling projects will benefit from this approach, since logging data are available just after the drilling campaign, whereas core descriptions, though more resolved, only become available months to years later.

Towuti湖位于印度尼西亚苏拉威西岛中部，在印度洋太平洋暖池内，该池是全球重要的大气热量和湿度预算地区。2015年，Towuti钻探项目从湖中回收了1000 m以上的钻芯，并从两个钻探地点获得了井下地球物理测井数据。岩心构成了来自印度洋太平洋暖池的最长的连续湖泊沉积物演替。我们将岩性描述与钻孔测井数据相结合，并使用多元统计数据来更好地了解这些沉积物的循环序列，古环境和年代学。准确的时间顺序对于分析和解释古气候记录至关重要。天文调整可以帮助建立年龄深度模型并填补年龄控制点之间的空白。从Towuti湖沉积物的连续记录，对湖相岩相（湖底以下10-98 m）的井下磁化率测井进行了旋回地层学调查。这项研究提供了从底特弗层（〜797 ka）和C年代测算的辐射年龄之间盆地沉积历史的见解。¹⁴年龄（〜45 ka）。我们推导了一个年龄模型，其范围从海洋同位素晚期（MIS）23到MIS 6晚期（903±11至131±67 ka）。尽管由相对较短的记录和沉积物的物理特性差异引起的不确定性限制了我们方法的有效性，但我们建议偏心周期和/或全球冰川-冰川间气候变化是中部地区水文气候局部变化的主要驱动力印度尼西亚。我们为Towuti湖的湖相生成了第一个几乎完整的年龄深度模型，并研究了地球物理井下测井的潜力，以进行时间估算和岩性描述。未来的湖泊钻探项目将受益于这种方法，因为在钻探活动结束后即可获得测井数据，而核心描述，