Volcanological Investigations of a Superfast-Spreading Mid-Ocean Ridge

超快速扩张的洋中脊的火山学调查

• 批准号: 9633398
• 负责人: John Sinton
• 金额: $ 45.21万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633398&HistoricalAwards=false
• 关键词: Volcanological; Investigations; Superfast; Spreading; Mid

9633398 Sinton The East Pacific Rise near 17 S is the fastest mid-ocean spreading ridge, but the thickness of volcanic rocks appears to be the same as on slowly spreading ridges. Magma must be supplied from the mantle, therefore, at a much greater rate than at other ridges. This aspect suggests that there must be numerous eruptions and a nearly constant source of magma storage. The frequent eruptions and rapid sedimentation rate in this area make it possible to determine relative ages of frequent eruptions. The Pis wish to determine the frequency and size of lava flows, which could help to determine the rate at which magma is supplied to the surface.

9633398辛顿 南纬17度附近的东太平洋海隆是洋中扩张最快的海脊，但火山岩的厚度似乎与缓慢扩张的海脊相同。因此，岩浆必须以比其他海脊更快的速度从地幔中供给。这一相位意味着一定有无数的喷发和几乎恒定的岩浆储存源。该地区火山喷发频繁，沉积速率快，因此有可能确定频繁喷发的相对年龄。Pis希望确定熔岩流的频率和大小，这可能有助于确定岩浆供应到地表的速度。