COLLABORATIVE RESEARCH: Model-Assisted Comparative Sequence Stratigraphy

合作研究：模型辅助比较层序地层学

• 批准号: 9117648
• 负责人: Robley Matthews
• 金额: $ 10.09万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-02-01 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117648&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Model; Assisted; Comparative

One of the most intriguing aspects of the geologic record of global change is the role of orbital forcing in ice volume fluctuations. While the variation in solar insolation resulting from perturbations in the Earth's orbit are relatively small and average out over the year, their effect on global ice volume is quite large. The Miocene is an especially interesting period of global change. Early Miocene oceanic deep water temperatures were much warmer than today. The middle to late Miocene encompasses a major transition toward conditions more like today. Recent studies indicate the mechanism linking Miocene deep water temperatures and global ice volume were quite different from the late Pleistocene. Collaborative research shall achieve an integrated, internally consistent interpretation regarding orbital forcing of Miocene eustasy and resulting sequence stratigraphy of the Baltimore Canyon Trough and the Northwest Gulf of Mexico Basin. Central to this undertaking is the STRATA-various computer program, which has been developed specifically to perform two- and three-dimensional forward modeling of clastic sedimentation within the context of high-frequency glacioeustatic sea level fluctuations. The Miocene sequences of the Baltimore Canyon Trough and the Northwest Gulf of Mexico Basin offer differing and complementary challenges and opportunities. The former is a thinner section, offering better resolution in higher frequency seismic data whereas the latter is thicker, more complete, and has a higher density of well log information available. Both sequences must be affected by the same Miocene glacioeustasy. Can stratigraphy be resolved down to the 10,000 year event level predicted by orbital forcing? More precise and quantitative solutions to stratigraphic problems shall create the framework within which to document the geologic record of global change.

地质记录中最有趣的一个方面是 全球变化是轨道强迫在冰量中的作用 波动 太阳辐射的变化 在地球轨道上的扰动相对较小， 平均下来，它们对全球冰量的影响是 相当大。 中新世是一个特别有趣的时期， 全球变化 早中新世海洋深水温度 比今天暖和多了。 中新世中晚期包括一个 向更像今天的情况的重大转变。 最近的研究 揭示了中新世深水温度与 全球冰量与晚更新世有很大不同。 合作研究应实现一个综合的，内部 中新世轨道强迫的一致解释 巴尔的摩峡谷层序地层学 海槽和西北墨西哥湾盆地。 这方面的核心 承担的是STRATA-各种计算机程序，已被 专门开发用于执行二维和三维 碎屑沉积的正演模拟 冰川海平面高频波动。 中新世 巴尔的摩峡谷海槽和西北湾的层序 墨西哥盆地提供不同和互补的挑战， 机会 前者是较薄的部分，提供更好的 分辨率在较高的频率地震数据，而后者是 测井曲线较厚、较完整、密度较高 information available. 这两个序列必须受到相同的影响 中新世冰河时期 地层学是否可以分解到 1万年事件水平预测轨道强迫？ 更精确 地层学问题的定量解决方案 在这个框架内，记录了 全球变化