Radiometric and Paleomagnetic Constraints on Late QuaternaryHolocene Volcanic Evolution of the Central American Arc in Guatemala

危地马拉中美洲弧晚第四纪全新世火山演化的辐射和古地磁约束

• 批准号: 9017821
• 负责人: Jimmy Diehl
• 金额: $ 6.03万
• 依托单位: Michigan Technological University
• 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: 1991-03-15 至 1995-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017821&HistoricalAwards=false
• 关键词: Radiometric; Paleomagnetic; Constraints; Late; QuaternaryHolocene

This project will: 1) Determine repose periods and frequency of eruptions at large silicic centers by dating key stratigraphic units by 40Ar/39Ar method. 2) Provide insight into the nature and timing of overlapping volcanic activity at Quaternary- Holocene stratovolcanoes using 14C and paleomagnetic secular variation. 3) Establish the nature and geometry of a paleomagnetic excursion previously reported at Santa Maria. 4) Evaluate the long-term statistical behavior of geomagnetic secular variation at low latitudes. In addition, the PIs plan to develop long-term volcanic hazard assessment and hazard zonation maps.

该项目将：1）确定休息时间和频率 通过测定关键地层的年代， 40 Ar/39 Ar法测定。 2)提供对自然的洞察 第四纪火山活动重叠的时间- 使用14 C和古地磁长期的全新世成层火山 变化量 3)建立的性质和几何形状， 在圣玛利亚先前报道的古地磁漂移。 4)评估地磁的长期统计行为 低纬度的长期变化。 此外，PI计划开发长期火山灾害 评估和危险区划图。