Internal Structure of an Endogenous Andesitic/Dacitic Dome Complex--Augustine Volcano

内生安山岩/英安岩穹丘杂岩的内部结构--奥古斯丁火山

• 批准号: 9405471
• 负责人: Juergen Kienle
• 金额: $ 10.8万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9405471&HistoricalAwards=false
• 关键词: Internal; Structure; Endogenous; Andesitic; Dacitic

9405471 Kienle Thousands of people around the world live at the bases of active silicic domes and dome complexes. This project is to develop a quantitative three-dimensional interior view of an actively growing endogenous dome complex. The PIs plan to tomographically image P-wave velocities through the central dome complex of Augustine Volcano. The volume to be sampled with some 7,000 seismic rays is about 1km3 (500 m radius) around the vent. The experimental design afforded by working near the summit of a volcano is unique in the world of geotomography, and the suite of illumination angles to be acquired is more similar to those employed in medical tomography than those generally used in geophysics. Expected resolution will less than fifty meters. This is a first attempt in the U.S. to gain detailed knowledge of the interior structure and growth processes of a readily accessible and active endogenous dome complex.

9405471 Kienle世界各地有成千上万的人生活在活性硅圆顶和圆顶建筑群的基地。这个项目是开发一个活跃生长的内源性穹顶复合体的定量三维内部视图。pi计划通过奥古斯丁火山的中央圆顶建筑群对纵波速度进行层析成像。大约7000条地震射线的采样体积约为1km3（500米半径）。在火山山顶附近工作所提供的实验设计在地质层析成像界是独一无二的，所获得的一组照明角度更类似于医学层析成像中使用的角度，而不是地球物理学中通常使用的角度。预计分辨率将低于50米。这是美国首次尝试获得易于接近和活跃的内源性穹顶复合体的内部结构和生长过程的详细知识。