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

9305272 布拉洛尔 在这项跨学科的合作研究中，PI将调查墨西哥东北部中白垩纪海洋序列的生物地层学，磁性地层学，旋回地层学和稳定同位素地层学，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）该序列的氧最小区模型的适当性，3）富含有机物的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）在此期间短暂磁反转的意义，6）轨道周期是否记录在这个序列中？7)旋回性的表现是如何沿沿着盆地边缘变化的？8)浮游有孔虫在这段时间内的进化时间，以及9）微型浮游生物和浮游有孔虫如何对这一时期的事件作出反应？ 将评估Apticore/Albicore的潜在钻井地点。 ***

9305272 Bralower 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. ***