Eruptive History of the Western Volcanic Zone, Iceland

P.I.：辛顿提案编号： 98-11276 机构：夏威夷大学题目：冰岛西部火山区的喷发历史 这项工作的目的是通过绘制熔岩流图，确定其喷发量和包括化学成分在内的其他特征，以确定冰岛西部火山区暴露的约170公里大西洋中脊的喷发历史。 对单次喷发产物的详细研究将确定喷发口的物理性质、熔岩流形态、裂缝长度和喷发量，以及与这些特征有关的化学变化。 西部火山区所有火山爆发的综合数据将构成一个前所未有的综合数据库，其中包括沿着大洋中脊很大一部分地区火山爆发的频率、数量、化学变化和空间分布。 研究结果将被用来推断这个缓慢扩张但岩浆供应量高的洋中脊的次火山岩浆库的性质、规模和过程。

P.I.: Sinton Proposal Number: 98-11276 Institution: University of Hawaii Title: Eruptive history of the Western Volcanic Zone, Iceland The objective of this work is to determine the eruptive history of ~170 km of Mid-Atlantic Ridge exposed in the Western Volcanic Zone of Iceland by mapping of lava flows, determining their eruptive volumes and other characteristics including chemical composition. Detailed study of the products of single eruptions will determine the physical nature of eruptive vents, lava flow morphologies, fissure lengths, and eruptive volumes, as well as the chemical variations associated with these features. The combined data for all eruptions within the Western Volcanic Zone will constitute an unprecedented composite of the frequency, volumes, chemical variability and spatial distribution of volcanic eruptions occurring along a significant portion of mid-ocean ridge. The results will be used to infer the nature, size, and processes occurring in subvolcanic magma reservoirs for this slow spreading but high magma supply mid- ocean ridge.