In this paper we present and analyze spreading-parallel seismic transects that image the oceanic crust in the eastern Gulf of Aden, from the Oman to the Socotra margins, across the active Sheba mid-oceanic ridge and between the Socotra-Hadbeen and Eastern Gulf of Aden Fracture Zones. The correlation of potential field data sets and gravity modelling allow us to document the spreading history of this oceanic basin from the onset of seafloor spreading ~16 Ma-ago to the present. Two main oceanic sub-domains display distinct structural characteristics associated with different magmatic budgets at this mid-ocean ridge. In addition, we document the occurrence of a magmatic pulse at the Sheba Ridge around 11 Ma leading to the construction of a magmatic plateau in the western part of the studied area. This event led to substantial deformation and additional magmatism in previously formed oceanic crust. It could be related to an off-axis magmatic event previously identified in the adjacent Sheba segment, itself possibly related to the Afar plume.

中文翻译：

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亚丁湾东部的边缘到边缘海底扩张：来自地震反射、重力和磁性数据的 16 Ma 长的变形和岩浆作用历史

在本文中，我们介绍并分析了对亚丁湾东部、从阿曼到索科特拉岛边缘、穿过活跃的示巴洋中脊以及索科特拉-哈德宾湾和东部海湾之间的洋壳进行成像的扩展平行地震断面。亚丁断裂带。势场数据集和重力模型的相关性使我们能够记录这个大洋盆地从大约 16 Ma 年前海底扩张开始到现在的扩张历史。两个主要的海洋子域显示出与该洋中脊不同岩浆收支相关的不同结构特征。此外，我们记录了 11 Ma 左右在示巴山脊发生岩浆脉冲，导致研究区西部岩浆高原的形成。这一事件导致了先前形成的洋壳中的大量变形和额外的岩浆活动。它可能与先前在相邻示巴段中发现的离轴岩浆事件有关，其本身可能与阿法尔羽流有关。