Collaborative Research: Structure and Composition of Fast-Spread EPR (East Pacific Rise) Oceanic Crust Exposed at Pito Deep

在这次合作调查中，将对位于EPR复活节微板块东北边缘的Pito Deep暴露上大洋地壳的主要裂谷悬崖进行嵌套规模的调查和取样。 主要的断层陡坎沿着复活节微板块的东北边缘沿着扩展的裂谷切割深海丘陵线性构造和磁性异常，形成海洋地壳的自然横截面。 将使用DSL-120侧扫声纳定位露头区域，并使用ALVIN和Jason II进行观测。 这项调查的基本原理是扩大对上洋壳内部结构和组成的了解，并由此推断出超快速扩张脊的过程。

In this collaborative investigation, a nested-scale survey of major rift escarpments that expose the upper oceanic crust at Pito Deep, located on the northeast edge of the Easter microplate on the EPR will be surveyed and sampled. Major fault scarps bounding a propagating rift along the NE edge of the Easter Microplate cut abyssal hill lineaments and magnetic anomalies at right angles creating a natural cross section of the oceanic crust. Outcrop areas would be located using DSL-120 sidescan sonar, and observed using ALVIN and Jason II. The rationale for this investigation is to extend knowledge of the internal structure and composition of the upper oceanic crust, and by inference, processes at superfast spreading ridges.