Little is known about the geological history of the Glorieuses seamount including basic information about its age and origin related to the regional evolution of the southern tip of the Somali Basin. This study focused on describing and reconstructing the long-term stratigraphic evolution of the Glorieuses seamount (SW Indian Ocean) to identify the mechanisms that have occurred through time to finally shape the emerged modern islands. Distinct terrace levels, currently submerged along the flanks of the seamount and surrounding seamounts, have already been interpreted as resulting from successive carbonate development and back-stepping episodes over the last 62 Myr. New isotopic and biostratigraphic dating on the flanks of the seamount, coupled with sequence stratigraphic interpretation of seismic profiles acquired in the adjacent basin, provide new constraints for the Late Cretaceous and Cenozoic vertical evolution of the seamount topped by carbonate platforms and sedimentation in the surrounding deep basin. Even if starved steep slopes prevent a straightforward source-to-sink continuity between the platform and the basin domains, our findings propose a consistent chronostratigraphic framework for the identified seismic markers and sequences in the deep basin, and discuss a long-term geological model that includes the main driving factors behind deposition (volcanic events, subsidence vs uplift phases, climate and hydro-dynamism changes) and their quantitative impact on the evolution of the isolated carbonate sedimentary system. Our results show that: (i) the Glorieuses volcanic seamount emerged from two successive Late Cretaceous magmatic pulses, firstly during the Turonian, then during the Maastrichtian (ii) at least two potential uplift phases are recognized during the Tertiary (Paleogene and/or the Eocene and Tortonian); (iii) basinal sedimentation recorded an abrupt change probably related to major regional hydro-dynamical changes in Late Eocene times in the Western Indian Ocean; (iv) the export of sediments from the platform towards the basin (numerous gravity flow processes) is strongly enhanced after the Mid Miocene, and is probably linked to the onset of the Asian monsoon winds and bipolar circulation. Finally, the Glorieuses seamount, although located in the vicinity of the Comoros islands, appears to have a much longer history and is geologically more comparable to the nearby Seychelles. This long-term study has enabled us to associate the Glorieuses seamount with the SSE-NNW Madagascar-Seychelles alignment rather than with the Comoro hot spot evolution.

关于Glorieuses海山的地质历史知之甚少，包括有关其年龄和起源的基本信息，这些信息与索马里盆地南端的区域演化有关。这项研究的重点是描述和重建Glorieuses海山（西南印度洋）的长期地层演化，以确定随着时间的流逝最终形成新兴岛屿的机制。目前沿着海山和周围海山的侧面淹没的不同阶地水平，已经解释为是由于最近62迈尔的连续碳酸盐岩发育和后退事件引起的。海山侧面新的同位素和生物地层测年，以及对相邻盆地采集的地震剖面的层序地层解释，为海山的晚白垩纪和新生代垂直演化提供了新的限制，其顶部是碳酸盐台地和周围深盆地的沉积。即使饥饿的陡坡阻止了平台与盆地域之间直接的源-汇连续性，我们的发现也为深层盆地中识别出的地震标志和层序提出了一致的年代地层框架，并讨论了长期地质模型包括沉积背后的主要驱动因素（火山事件，沉陷与隆升阶段，气候和水动力变化）及其对孤立的碳酸盐沉积系统演化的定量影响。我们的结果表明：（i）Glorieuses火山海山是由两个连续的晚白垩纪岩浆脉冲形成的，首先是在土伦时期，然后在马斯特里赫特（ii）的第三纪（古近纪和/或始新世和托土纪）至少识别出两个潜在的隆升阶段；（iii）盆地沉积录得突然变化，可能与西印度洋始新世晚期的主要区域水动力变化有关；（iv）中新世中期以后，沉积物从平台向盆地的出口（大量重力流过程）得到了极大的增强，这可能与亚洲季风和双极环流的爆发有关。最后，尽管格洛列厄斯海山位于科摩罗群岛附近，但它的历史似乎要长得多，并且在地质上与附近的塞舌尔群岛具有可比性。