MACQUARIE ISLAND: A UNIQUE WINDOW INTO THE OCEAN BASEMENT AND THE LINK BETWEEN OCEAN RIDGES AND OPHIOLITES

麦夸里岛：一个独特的窗口，进入海洋基底和海洋山脊和蛇绿岩之间的联系。由于无法进入深海海底，对海洋地壳的组成和结构的了解有限。麦夸里岛是世界上唯一露出海面的洋壳和地幔碎片，为就地研究洋底生成过程提供了一个独特的机会。我们的项目将对该岛的下地壳和地幔部分进行详细的测绘，然后对样品进行综合的显微结构，岩石学和地质年代学分析。这种调查可能导致在了解洋中脊扩张中心洋壳的形成、变形和就位方面取得根本性进展。

MACQUARIE ISLAND: A UNIQUE WINDOW INTO THE OCEAN BASEMENT AND THE LINK BETWEEN OCEAN RIDGES AND OPHIOLITES. Knowledge about the composition and structure of the oceanic crust is limited due to the inaccessibility of the deep-ocean floor. Macquarie Island is the only fragment of ocean crust and mantle exposed above sea-level in the world, providing a unique opportunity to study processes of oceanic floor generation in-situ. Our project will carry out detailed mapping of the lower crust and mantle sections on the island, followed by an integrated microstructural, petrological, and geochronological analysis of samples. Such investigations may lead to fundamental advances in the understanding of formation, deformation, and emplacement of oceanic crust at mid-ocean ridge spreading centres.