Sedimentological characterization and provenance analysis of the pre-collisional Betic & Rif turbidite systems

贝特-里夫造山带是西地中海阿尔卑斯链造山带的最西段。南伊比利亚和北非古边缘的汇聚导致地壳变形和Alborán域的西移是该区地质演化的主要原因。这两个过程导致沉积在马格里布盆地的深海演替被抬升和推覆到伊比利亚和非洲边缘。这些沉积物出现在西班牙西南部的Campo de Gibraltar地区，也可以向东追溯至Dinarides。因此，贝特-裂谷系统是我们了解马格里布盆地和西地中海发展过程中发生的地球动力学过程的关键区域。Campo de Gibraltar地区包含多种岩性单元，主要有三个地层单元，即Algeciras、Aljibe和Bolonia单元。这些地层在地中海的摩洛哥一侧也有相同之处。来自各种砂岩体的岩石学和物源信息是缺乏的，第一个目的是利用各种岩石学、地球化学和同位素分析来纠正这一点。第二，对我们了解马格里布盆地西部的演化具有根本重要性的直布罗陀Campo de Gibraltar内的沉积演替记录很少。对这些演替的高分辨率调查将为我们提供更好地理解该地区区域和局部地球动力学事件的原因和后果的工具。

The Betic-Rif orogenic system is the westernmost segment of the Western Mediterranean Alpine Chains orogenic belt. The geological evolution of the region resulted from the convergence of the S Iberian and N African palaeomargins leading to crustal deformation, and the westward movement of the Alborán Domain. These two processes resulted in the uplift and thrusting of deep-marine successions, which had been deposited in the Maghrebian Basin, onto the Iberian and African margins. These sediments, cropping out in the Campo de Gibraltar region of SW Spain, can also be traced eastwards as far as the Dinarides. The Betic-Rif system, therefore, is a key area for our understanding of the geodynamic processes which took place during the development of the Maghrebian Basin, as well as the western Mediterranean.The Campo de Gibraltar region contains a variety of lithological units, with three main stratigraphic units recognized, namely, Algeciras, Aljibe and Bolonia units. These have stratigraphic equivalents on the Moroccan side of the Mediterranean. Petrological and provenance information from the various sandstone bodies is lacking and the first aim is to rectify this using a variety of petrological, geochemical and isotopic analyses. Secondly, the sedimentary successions within the Campo de Gibraltar, which are of fundamental importance to our understanding of the evolution of the western part of the Maghrebian Basin, are poorly documented. High-resolution investigation of these successions will provide us with the tools to better understand the causes and consequences of the regional and local geodynamic events in this area.