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

在这项跨学科的合作研究中，pi将研究墨西哥东北部中白垩世海相层序的生物地层学、磁地层学、旋回地层学和稳定同位素地层学，这代表了全球快速变化的时期。需要解决的问题包括：1)相关海洋缺氧事件的存在，2)该层序氧最小带模型的适用性，3)富有机质沉积与海平面波动的潜在相关性，4)有机碳埋藏事件与碳同位素记录的关系，5)这一时期短暂磁极反转的意义，6)该层序是否记录了轨道周期？7)旋回性在盆地边缘如何变化？8)浮游有孔虫在这一时期的进化时间，9)纳米浮游生物和浮游有孔虫是如何对这一时期的事件做出反应的？将对Apticore/Albicore的潜在钻井地点进行评估。＊＊＊

9313914 Longoria 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. ***