Analysis of Data Collected During the Loihi Seamount Survey,10/31/86 - 11/4/86

了解大洋盆地中的火山过程对地球科学中的几个主要研究领域至关重要。大多数活火山活动发生在大洋中脊，由于地壳板块的分离，地幔物质在那里上升并融化。远离这些板块边界，可以形成海山和海洋岛屿，尽管在这种环境中形成岩浆的过程鲜为人知。本项目将研究夏威夷岛链东南部最近形成的海山Loihi的地震数据。目前关于这一火山活动地貌起源的模型表明，它是或将是夏威夷山脊上的一个新的火山岛或海山。夏威夷火山显然是由地幔岩浆产生的，因为太平洋板块漂移到固定的岩浆源上方。该项目的总体目标是查明洛伊希地震的震源和深度，并将其与这些海山的火山演化模型联系起来。此外，该项目将提供限制，以便更好地从夏威夷群岛的陆地台定位未来的地震。该项目的数据是在一次由大学赞助的研究巡航中收集的。

Understanding volcanic processes in the ocean basins is critical to several major research areas in the geosciences. Most active volcanism occurs at mid-ocean ridges where mantle material upwells and melts as a result of the separation of crustal plates. Away from these plate boundaries seamounts and oceanic islands can form, though the processes which form magmas in this environment are poorly understood. The present project will examine seismic data from a recently formed seamount, Loihi, to the southeast of the Hawaiian Island chain. Current models for the origin of this volcanically active feature indicate that it is, or will be, a new volcanic island or seamount along the Hawaiian ridge. Hawaiian volcanoes are apparently produced by magma from the mantle as the Pacific Plate drifts over a fixed magma source. Overall objectives of the project are to identify the source and depth of earthquakes in Loihi and to relate these to models of the volcanic evolution of such seamounts. Additionally, the project will provide constraints to allow better location of future earthquakes from land stations on the Hawaiian Islands. Data for the project were collected on a university sponsored research cruise.