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Volcanological Investigations of a Superfast-Spreading Mid-Ocean Ridge

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:
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
项目状态:
已结题
起止时间:
1998-09-15 至 2004-08-31

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中文摘要
翻译
9633398 S附近的东太平洋隆起是大洋中最快的扩张海脊,但火山岩的厚度似乎与缓慢扩张的海脊相同。因此,岩浆必须以比其他山脊快得多的速度从地幔中提供。这一方面表明,一定有多次喷发和几乎不间断的岩浆储存来源。该地区频繁的喷发和快速的沉积速度使得确定频繁喷发的相对年龄成为可能。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。
英文摘要
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.
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