The Ridge Magmatic Regime, Crystal Size Distributions, and Theory and Observation

山脊岩浆体系、晶体尺寸分布、理论和观测

• 批准号: 9711575
• 负责人: Bruce Marsh
• 金额: $ 12.26万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-11-15 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9711575&HistoricalAwards=false
• 关键词: Ridge; Magmatic; Regime; Crystal; Size

Beneath the mountainous ocean ridges lies a ribbon-like vat of magma from which tectonic plates are made. The existence of this magma is known from the lavas erupted onto the seafloor and from seismic studies of this region. The eruptive behavior and rate of cooling of this magma is recorded in the numbers and sizes of crystals contained by the lavas. This research involves measuring the distribution of crystal sizes in rocks from the East Pacific Rise and the Mid-Atlantic Ridge to discern the individual styles of magmatism at these ridges. Because the separation rate differs significantly between these ridges, a marked difference in the crystal size distributions is expected. This work will contribute to understanding the fundamental process by which Earth evolves as a planet.

在多山的洋脊之下，存在着一个带状的岩浆池，构造板块就是由这些岩浆形成的。 这种岩浆的存在是从喷发到海底的熔岩和对该地区的地震研究中得知的。 这些岩浆的喷发行为和冷却速度记录在岩浆中所含晶体的数量和大小中。 熔岩 这 研究 涉及 测量 东太平洋海隆和中大西洋海岭岩石中晶体尺寸的分布，以辨别这些海岭的岩浆活动的不同风格。 由于这些脊之间的分离速率显著不同，因此预期晶体尺寸分布的显著差异。 这项工作将有助于理解地球作为一个行星演变的基本过程。