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

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)提供对自然的洞察力 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。

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.