High-Resolution of Geomagnetic Reversals from Plio-Pleistocene Sediments in Southern California

南加州上皮奥-更新世沉积物的高分辨率地磁反转

• 批准号: 9019289
• 负责人: Joseph Kirschvink
• 金额: $ 17.78万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019289&HistoricalAwards=false
• 关键词: Resolution; Geomagnetic; Reversals; Plio; Pleistocene

Previous magnetostratigraphic work has (1) located the upper and lower boundaries of the Olduvai magnetic Chron in lake sediments from Southern Death Valley, (2) found similar boundaries of what is probably the Jaramillo Chron in ancient lake Manix near Barstow in the Mojave desert, and (3) located what may be the Mammoth and Kaena events in the Pico formation of the Ventura Basin. The PI will sample these reversal horizons in high resolution to determine their temporal, chemical,a nd geomagnetic characteristics. High-fidelity records of the field are present, apparently including secular variations and geomagnetic reversals.

先前的磁地层学工作（1）在南部死亡谷的湖泊沉积物中定位了奥杜瓦伊磁性Chron的上边界和下边界，（2）在莫哈韦沙漠巴斯托附近的古马尼克斯湖中发现了可能是Jaramillo Chron的类似边界，以及（3）在文图拉盆地的Pico地层中找到了可能是Mammoth和Kaena事件的边界。 PI 将以高分辨率对这些反转层进行采样，以确定它们的时间、化学和地磁特征。 存在高保真度的磁场记录，显然包括长期变化和地磁反转。