Collaborative: Geophysical Investigation of the Gulf of Aden: Determining How Hotspot Proximity Affects Tectonic, Magmatic and Stratigraphic Development of Conjugate Margin

OCE99-11877Driscol奖是对亚丁湾西部和中部共轭大陆边缘的地球物理研究，以确定世界上一个关键地区的构造、地层和岩浆发展，以了解大陆裂谷的启动过程。将收集深穿透、多通道反射和海底地震仪(OBS)折射数据、带状水深对称、磁力和重力数据来支持这些目标，这些数据的中心是确定阿法尔地幔羽流如何影响亚丁湾地区大陆解体和裂谷侧翼结构的发展。具体地说，在重建共轭边缘演化的过程中，将研究应变分配、岩浆作用和地壳结构随到阿法尔柱的距离的变化而发生的变化。这项工作还将作为支持ODPPRE建议528-PRE的现场调查，并解决ODP长期计划的一个重要目标，即了解早期共轭边缘发展和大陆-海洋过渡。

OCE 99-11877DriscollAward is for a geophysical study of the western and central Gulf of Aden conjugate continental margins to define the tectonic, stratigraphic, and magmatic development of one of the world's key areas for understanding how the initiation of continental rifting proceeds. Deep-penetration, multi-channel reflection and Ocean Bottom Seismometer (OBS) refraction data, swath bathymmetry, magnetic, and gravity data will be collected in support of the objectives, which are centered around determining how the Afar mantle plume has affected the development of continental breakup and rift-flank structural development in the Gulf of Aden area. Specifically, variation of strain partitioning, magmatism, and crustal structure with variation of distance from the Afar plume will be examined in the course of reconstructing conjugate margin evolution. This work will also serve as a site survey in support of the ODP pre-proposal 528-Pre, and addresses an important goal of the ODP Long Range Plan, that of understanding early conjugate-margin development and continent-ocean transitions.