(GRGC) Collaborative Research: Measuring Middle Cretaceous Global Change in Northeastern Mexican Sections

9313915赫伯特在这项合作的跨学科研究中，PIS将研究墨西哥东北部中白垩世海相层序的生物地层学、磁性地层学、旋回地层学和稳定的同位素地层学，该层序代表着全球快速变化的时代。需要解决的问题包括：1)相关海洋缺氧事件的存在，2)该序列氧最小区域模型的适用性，3)富有机沉积与海平面波动的潜在关联，4)有机碳埋藏事件与碳同位素记录的关系，5)这段时间内短暂磁逆的意义，6)这个序列中记录的轨道周期吗？7)旋回性的表达是如何沿着盆地边缘变化的？8)这段时间浮游有孔虫的演化时间，超小型浮游生物和浮游有孔虫对这一时期发生的事件有何反应？将评估Apticore/Albiore的潜在钻探地点。***

9313915 Herbert In this collaborative, interdisciplinary study, PIs will investigate biostratigraphy, magnetostratigraphy, cyclostratigraphy and stable isotope stratigraphy of a middle Cretaceous marine sequence in northeastern Mexico, representing a time of rapid global change. Issues to be addressed include: 1) presence of correlative oceanic anoxic events, 2) appropriateness of an oxygen- minimum-zone model for this sequence, 3) potential correlation of organic-rich sedimentation with sea-level fluctuations, 4) relationship of organic-carbon burial events to record of carbon isotopes, 5) significance of a brief magnetic reversal during this time, 6) are orbital periodicities recorded in this sequence?, 7) how does the expression of cyclicity change along the basin margin?, 8) timing of evolution of planktonic forams during this time, and 9) how do nannoplankton and planktonic forams respond to events around this time period? Potential drilling sites for Apticore/Albicore will be evaluated. ***