Cyclostratigraphy and paleoenvironmental inference from downhole logging of sediments in tropical Lake Towuti, Indonesia
Cyclostratigraphy and paleoenvironmental inference from downhole logging of sediments in tropical Lake Towuti, Indonesia
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印度尼西亚热带托乌提湖沉积物井下测井的旋回地层学和古环境推断
DOI：
10.1007/s10933-020-00171-9
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发表时间：
2021
影响因子：
2.1
通讯作者：
Bijaksana
中科院分区：
文献类型：
--
作者：
Ulfers;Zeeden;Russell;Bijaksana
托乌提湖位于印度尼西亚苏拉威西岛中部，位于印度太平洋暖池内，是全球重要的大气热量和湿度预算区域。 2015 年，Towuti 钻探项目从湖中回收了超过 1000 米的钻芯，以及来自两个钻探地点的井下地球物理测井数据。这些岩心构成了印度太平洋暖池最长的连续湖泊沉积物序列。我们将岩性描述与钻孔测井数据相结合，并使用多元统计来更好地了解这些沉积物的旋回序列、古环境和地质年代学。准确的年表对于分析和解释古气候记录至关重要。天文调谐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。根据托乌提湖沉积物的连续记录，对湖相（湖底以下 10-98 m）的井下磁化率测井进行了旋回地层调查。这项研究深入了解了盆地在火山灰层（~ 797ka）和岩心 C14 年龄（~ 45ka）测年得出的辐射年龄之间的沉积历史。我们得出了一个年龄模型，涵盖从海洋同位素阶段晚期 (MIS) 23 到 MIS 6 晚期（903 ± 11 到 131 ± 67 ka）。尽管相对较短的记录和沉积物物理性质的微小差异造成的不确定性限制了我们方法的有效性，但我们认为偏心率循环和/或全球冰期-间冰期气候变化是印度尼西亚中部水文气候局部变化的主要驱动因素。我们为托乌提湖湖相生成了第一个近乎完整的年龄深度模型，并研究了地球物理井下测井在时间估计和岩性描述方面的潜力。未来的湖泊钻探项目将受益于这种方法，因为测井数据在钻探活动结束后即可获得，而岩心描述虽然更加明确，但只有在数月至数年后才能获得。
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.
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距今 53,000 年以来印度尼西亚苏拉威西中部植被和水文变化的化合物特定碳同位素记录
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
S. Wicaksono;J. Russell;S. Bijaksana
通讯作者：
S. Bijaksana
影响因子：
1.2
作者：
J. Russell;S. Bijaksana;H. Vogel;M. Melles;J. Kallmeyer;D. Arizteguí;S. Crowe;S. J. Fajar;A. Hafidz;D. Haffner;Ascelina K. M. Hasberg;S. Ivory;C. Kelly;J. King;Kartika Hajar Kirana;Marina A. Morlock;A. Noren;Ryan O’Grady;Luis Ordóñez;J. Stevenson;T. Rintelen;A. Vuillemin;I. Watkinson;N. Wattrus;S. Wicaksono;T. Wonik;K. Bauer;A. Deino;A. Friese;C. Henny;Imran;R. Marwoto;L. Ngkoimani;S. Nomosatryo;L. O. Safiuddin;R. Simister;G. Tamuntuan
通讯作者：
J. Russell;S. Bijaksana;H. Vogel;M. Melles;J. Kallmeyer;D. Arizteguí;S. Crowe;S. J. Fajar;A. Hafidz;D. Haffner;Ascelina K. M. Hasberg;S. Ivory;C. Kelly;J. King;Kartika Hajar Kirana;Marina A. Morlock;A. Noren;Ryan O’Grady;Luis Ordóñez;J. Stevenson;T. Rintelen;A. Vuillemin;I. Watkinson;N. Wattrus;S. Wicaksono;T. Wonik;K. Bauer;A. Deino;A. Friese;C. Henny;Imran;R. Marwoto;L. Ngkoimani;S. Nomosatryo;L. O. Safiuddin;R. Simister;G. Tamuntuan
影响因子：
5.2
作者：
Vuillemin A;Friese A;Alawi M;Henny C;Nomosatryo S;Wagner D;Crowe SA;Kallmeyer J
通讯作者：
Kallmeyer J
过去约 29 kyr BP 期间印度尼西亚托乌提湖的沉积模式和湖水位变化
影响因子：
2.1
作者：
H. Vogel;J. Russell;S. Y. Cahyarini;S. Bijaksana;N. Wattrus;J. Rethemeyer;M. Melles
通讯作者：
M. Melles
影响因子：
56.9
作者：
Melles, Martin;Brigham-Grette, Julie;Wagner, Bernd
通讯作者：
Wagner, Bernd