Development of an orbitally tuned Late Miocene time scale (5-12 Ma)

轨道调谐晚中新世时间尺度（5-12 Ma）的开发

• 批准号: 5435127
• 负责人: Professor Dr. Ralf Tiedemann
• 金额: --
• 依托单位: Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5435127?language=en
• 关键词: Development; orbitally; tuned; Late; Miocene

The astronomical tuning technique is at present the most accurate absolute dating method for sediment records spanning the time interval of the last 35 Ma for which astronomers provide a valid and precise orbital solution for variations in Earth's orbital parameters... The orbitally tuned geological time scale already became the standard chronology for the Pleistocene and Pliocene... Our goal is to expand and to astronomically calibrate the 'Magnetic Polarity Time Scale', the oxygen isotope stratigraphy and biostratigraphy to 12 Ma at South Pacific Site 1237 (Leg 202). So far, this is the only marine site that meets nearly all critera of providing a complete Neogene reference section by integrating the excellent framework of both magnetostratigraphy into an orbitally tuned oxygen isotope stratigraphy. This proposal is embedded into a joint effort with DFG project Ku 649/18 and Ti 240/13 to develop a 'Magnetic Polarity Time Scale' and oxygen isotope stratigraphy for the entire Neogene.

天文调谐技术是目前对过去35 Ma期间的沉积物记录进行最准确的绝对测年的方法，天文学家为地球轨道参数的变化提供了有效和精确的轨道解决方案。轨道调整的地质年表已经成为更新世和上新世的标准年表。我们的目标是将南太平洋第1237站(202段)的‘磁极时标’、氧同位素地层学和生物地层学扩展到12 Ma，并进行天文校准。到目前为止，这是唯一一个几乎符合所有标准的海洋遗址，通过将这两个磁性地层学的优秀框架整合到轨道调谐的氧同位素地层学中，提供了一个完整的新近纪参考剖面。这一建议被嵌入到DFG项目Ku 649/18和Ti240/13的联合工作中，以开发整个新近纪的“磁极时标”和氧同位素地层学。