Hawaiian Plume Structure and Magmatic Processes Revealed by Submarine Landslides on Mauna Loa Volcano, Hawaii

P.I. Garcia提案编号：9729894 机构名称：夏威夷大学夏威夷Mauna Loa火山海底滑坡揭示的Haaiian地幔柱结构和岩浆过程地幔柱的解剖和其中的熔融过程，仍然是谜和有争议的问题，尽管许多人试图调查他们。 了解羽流的主要障碍是我们过去在探测羽流时采用的二维方法。 在莫纳罗亚山两侧发现的巨大滑坡提供了一个机会，在第三个维度上对羽流过程的产物进行采样。 这项研究将扩展我们对世界上最大的火山莫纳罗亚火山的岩浆历史的认识，大约20万年，应该为热点生成的火山的发展提供基本的见解，并澄清有关夏威夷羽流结构和动力学的长期争议。 我们还将研究以下假设：夏威夷火山来自1亿年来爆发的一些最热的岩浆，海洋岛屿火山主要由碎片熔岩而不是枕状熔岩组成（这对所有海洋岛屿的地质灾害都有影响）。

P.I. GarciaProposal Number: 9729894 Institution: University of HawaiiTitle: Haaiian plume structure and magmatic processes revealed by submarine landslides on Mauna Loa Volcano, HawaiiThe anatomy of mantle plumes, and melting processes within them, remain enigmatic and controversial issues despite numerous attempts to investigate them. The main obstacle to understanding plumes has been our past two-dimensional approach in exmining them. The discovery of giant landslides on the flanks of Mauna Loa provides an opportunity to sample the products of plume processes in the third dimension. This study will extend our knowledge the magmatic history Mauna Loa's, the world's largest volcano, by -200,000 years, should provide fundamental insights into the development of hotspot-generated volcanoes and clarify longstanding controversies concerning the structure and dynamics of the Hawaiian plume. We will also examine the following hypotheses: Hawaiian volcanoes were derived from some of the hottest magmas erupted in the 100 million years and oceanic island volcanoes are dominantly comprised of fragmental lava rather than pillow lava (which has implications for the geologic hazards on all oceanic islands).