Collaborative Research: Integrated Geological Interpretationof Deep-Tow Sonar, Submersible, and Petrological Observations of the Upper and Lower Oceanic Crust

9317611德莱尼这个项目是为了分析在大西洋中部海脊凯恩断裂带最近研究期间收集的深度拖曳侧扫声纳数据。德莱尼(华盛顿大学)和他的同事卡森(杜克大学)建议将凯恩断裂带的研究结果与太平洋布兰科断裂带的类似侧扫声纳数据以及两个地区的潜水观测和岩石样本相结合。该项目的总体目标是破译下部(凯恩)和上部(Blanco)洋壳的形成所涉及的结构和岩石类型，这些地壳由于其构造环境而暴露在这些地点。拟议的工作建立在之前观察的基础上，包括在这些调查人员和法国同事的合作下，在七年时间里进行了四个独立的实地项目(法国潜水器Nautile用于两个潜水项目)。根据JOIDES决议，凯恩断裂带地区的研究与最近在该地区进行的大洋钻探计划钻探相结合，并提供了解释这些钻探岩芯的区域背景。这两个方案都提供了一个独特的机会，可以在沿着海底陡峭的悬崖裸露的区域内检查海洋地壳结构的连续性和细节。这为研究地壳建造的构造和壳内岩石学过程的空间和时间连续性提供了机会，这是使用钻探或地震反射剖面法的“标准”技术无法达到此处提出的详细程度的。***

9317611 Delaney This project is to analyse deeply-towed side-scan sonar data collected during recent studies in the Kane Fracture Zone on the Mid-Atlantic Ridge. Delaney (University of Washington) and his colleague Karson (Duke University) propose to integrate the results of the Kane Fracture Zone study with similar side-scan sonar data from Blanco Fracture Zone in the Pacific, as well as submersible observations and rock samples from both areas. The overall goal of the project is to decipher the structure and rock types involved in the formation of lower (Kane) and upper (Blanco) ocean crust, which are exposed at these sites due to their tectonic settings. The proposed work builds on previous observations, including four separate field programs over seven years, collaborative among these investigators and French colleagues (the French submersible Nautile was used for the two diving programs). Studies in the Kane Fracture Zone region integrate with recent Ocean Drilling Program drilling in this area by JOIDES Resolution, and provide a regional context in which to interpret these drilling cores. Both programs provide a unique opportunity to examine the continuity and detail of ocean crustal structure in a region where it is exposed along steep cliffs at the sea floor. This provides an opportunity to investigate both spatial and temporal continuity of tectonic and intracrustal petrologic processes of crustal formation, which is not possible to the level of detail proposed here using the "standard" techniques of drilling or seismic reflection profiling. ***