RAPID: Astrochronology of the Middle to Late Devonian platform margin strata from the Canning Basin, Australia and implications for timing of Middle-Late Devonian events

RAPID：澳大利亚坎宁盆地中晚泥盆世台缘地层的天文年代学及其对中晚泥盆世事件时间的影响

• 批准号: 0956563
• 负责人: Jessica Whiteside
• 金额: $ 1.5万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0956563&HistoricalAwards=false
• 关键词: RAPID; Astrochronology; Middle; Late; Devonian

RAPID: Astrochronology of the Middle to Late Devonian platform marginstrata from the Canning Basin, Australia and implications for timingof Middle-Late Devonian eventsJessica WhitesideBrown UniversityEAR-0956563ABSTRACTMiddle-Late Devonian age strata in the Canning Basin reef complex, northwestern Australia, record numerous lithological cycles and an extensive extinction among reef formers and invertebrates across the Givetian/ Frasnian boundary. This proposal seeks to develop a geochemical proxy set consisting of 13Corg and biomarker lipids from two locales along the Lennard Shelf with organic rich-facies to assess the timing and duration of this mass extinction. The goals of this research are three-fold:1. Assess the detailed Milankovitchian characters of Menyous Gap and within the Pillara Quarry with respect to modern astronomical theory and to discuss the results with respect to timing of the coral extinction events: Was this extinction protracted or relatively sudden?2. Reconstruct paleoenvironmental change in marine productivity (13Corg) and terrestrial ecosystem conditions (leaf wax-derived n-alkanes).3. Produce better correlation both within the basin and to similarly aged strata elsewhere using secular trends and low-frequency orbital cycles in 13Corg and n-alkanes. This research is urgent because of the limited time left within the existing larger Canning Project that combines magnetostratigraphy, conodont biostratigraphy, conodont Sr isotope chronostratigraphy, and biomarker analysis to investigate Middle-Late Devonian paleoenvironmental and biotic change. Gathering these data adds a new dimension (cyclostratigraphy) outside the scope of, but complementary to the existing Canning Project.

快速：澳大利亚坎宁盆地中期到晚期的泥盆纪平台边缘的天体人数及其对中段泥盆纪事件的影响，伊斯兰大学 - 0956565636363ABSTRACTMIDDLE-LATE-LATE-LATE-LATE-LATE-LATE LATE泥盆纪泥盆纪的年龄阶层，包括澳大利亚的canning盆地繁殖和许多人的经验，并记录了许多LICH，并记录了许多LICHESTER，其中包括许多LITHCELSIDER，其中包括许多LITHCEL，其中包括许多LiThologicy cyfress cyef and cyef and cyef cyerbress cyef and sefters cyfress cyef and cyef Givetian/ Frasnian边界。该提案旨在开发一个地球化学代理集，该集合由沿着Lennard架子的两个地区的13Corg和生物标志物脂质组成，具有有机丰富的面，以评估这种质量灭绝的时间和持续时间。这项研究的目标是三个方面：1。在现代天文学理论方面，评估详细的Milankovitchian特征以及在Pillara Quarry中，并讨论有关珊瑚灭绝事件的时间的结果：是这种灭绝是长时间的还是相对突然的？2。重建海洋生产率（13corg）和陆地生态系统条件（叶蜡衍生的N-Alkanes）的古环境变化。3。在13corg和N-Alkanes中，使用世俗趋势和低频轨道循环在盆地内部和类似年龄的地层内产生更好的相关性。这项研究很紧迫，因为在现有的较大罐头项目中剩下的时间有限，该项目结合了磁层，牙形牙齿生物地层学，牙形氏菌SR同位素年度地层学和生物标志物分析，以研究中勒的泥盆纪中比特泥盆纪古环境和生物变化。收集这些数据在范围之外增加了一个新的维度（环地层学），但与现有罐头项目的补充。