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首页> 外文OA文献 >The stratigraphic setting of continental shelves of southern Italy investigated through seismic stratigraphy: techniques, methodologies and case studies from Campania and Basilicata offshore (southern Tyrrhenian sea)
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The stratigraphic setting of continental shelves of southern Italy investigated through seismic stratigraphy: techniques, methodologies and case studies from Campania and Basilicata offshore (southern Tyrrhenian sea)

机译：地震地层大陆架的地层背景：海洋坎帕尼亚和巴西利卡塔（第勒尼安海南部）的技术，方法和案例研究

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摘要

The stratigraphic setting of continental shelves of Southern Italy is here studied and discussed through seismo-stratigraphic techniques and methodologies, focussing on case histories located in Campania and Basilicata offshore (Southern Tyrrhenian sea, Italy). Seismo-stratigraphic techniques and methodologies are examined, referring, in particular, to the Naples, Agropoli and Maratea areas (Campania and Basilicata regions). udIn the Campania offshore the stratigraphic architecture of the volcaniclastic basins of the Volturno Basin, Ischia offshore and Naples Bay is shown in detail and interpreted through the concepts of seismic stratigraphy. Regional geological concepts have also been utilized for a better land-sea interpretation of the seismic units filling the observed sedimentary basins. udA correlation with land geology of Southern Apennines has been attempted to obtain a better geological comprehension of the interpreted structures. udIn the Volturno Basin (northern Campania) the trending of the seismic units is controlled by the Massico structural high, bounding the basin towards the north-west and controlling depositional geometries typical of a NE-SW striking fan complex. Deep litho-stratigraphic well data tied to the seismic lines have highlighted the pyroclastic layers and the conglomeratic strata of the lagoon and delta environments, evolving upwards towards marine sediments. Complex strata patterns have been revealed by seismic data in the Quaternary basin filling, overlying the Meso-Cenozoic carbonatic basement and the related flysch deposits. udSeismo-stratigraphic evidence on buried volcanic structures and overlying Quaternary marine deposits are here presented to reconstruct the stratigraphic setting of the south-eastern continental shelf of the Ischia island (Naples Bay) and to draw attention to new implications on the marine geophysics and volcanology of the volcanic complex. In the eastern Ischia offshore relic volcanic edifices, representing the remnants of hydro-magmatic volcanic vents, mostly formed by hialoclastites and indicating an emplacement in a subaqueous environment have been investigated through high resolution seismics. udThe stratigraphic architecture of the Capri Basin and the Salerno Valley, tectonically-controlled and located southwards of the Capri-Sorrento master fault, strongly down throwing the Meso-Cenozoic carbonates cropping out in the Sorrento Peninsula has been studied in detail. The Capri Basin is a deep basin located southwards of the Naples Bay, filled by Pleistocenic-Holocenic sediments overlying Meso-Cenozoic carbonates. The Salerno Valley is a half-graben filled by three seismic units corresponding to Quaternary marine deposits, overlying Miocene siliciclastic chaotic sequences. udThe stratigraphic setting of the Quaternary marine successions of the Agropoli continental shelf, located offshore the Punta Licosa morpho-structural high, characterized by wide outcrops of rocky acoustic substratum and resulting from the seaward prolongation of the structural-stratigraphic units cropping out onshore in the adjacent emerged sector of the Cilento Promontory has been studied. udIn conclusion, the example of the continental shelf and slope off the Maratea Valley has been investigated. The relationships between the geological and structural settings on land and the seismic stratigraphy in the surrounding offshore have been examined. The geological framework of the Maratea Valley is connected with the late Pleistocene and Holocene geologic evolution on the shelf and slope, mainly in terms of late Quaternary sea level glacio-eustatic fluctuations.
机译：本文通过地震地层技术和方法论研究和讨论了意大利南部大陆架的地层环境，重点是位于坎帕尼亚和巴西利卡塔近海（意大利第勒尼安海）的案例历史。对地震地层技术和方法进行了研究，特别是那不勒斯，阿格罗波利和马拉泰亚地区（坎帕尼亚和巴斯利卡塔地区）。 在坎帕尼亚（Campania）海上，详细显示了Volturno盆地，伊斯基亚（Ischia）海上和那不勒斯湾（Naples Bay）火山碎屑盆地的地层结构，并通过地震地层学的概念对其进行了解释。区域地质概念也已被用来更好地解释填满观察到的沉积盆地的地震单元的陆海解释。 ud已尝试与南亚平宁山脉的土地地质联系起来，以更好地理解所解释的构造。 ud在Volturno盆地（坎帕尼亚北部），地震单元的走向受Massico构造高层控制，该盆地向西北方向界定，并控制了NE-SW打击扇群的典型沉积几何形状。与地震线相关的深层岩石地层井数据突出显示了泻湖和三角洲环境的火山碎屑层和砾岩层，并向上演化为海洋沉积物。第四纪盆地充填的地震数据揭示了复杂的地层模式，覆盖了中新生代碳酸盐岩基底和相关的飞石沉积。此处提供了有关地下火山构造和上覆第四纪海洋沉积物的地震地层学证据，以重建伊斯基亚岛（那不勒斯湾）东南大陆架的地层环境，并提请注意对海洋地球物理学和火山学的新影响火山综合体。在伊斯基亚州东部，代表海底岩浆火山喷口残留物的近海遗物火山大厦已通过高分辨率地震进行了调查，这些火山岩火山口主要是由破石碎屑岩形成的，并表明了其在水下环境中的位置。 ud对卡普里盆地和萨勒诺河谷的地层构造进行了构造控制，并位于卡普里-索伦托主断裂的南侧，强烈向下倾倒了索伦托半岛的中新生代碳酸盐岩。卡普里盆地是那不勒斯湾以南的一个深盆地，被中新生代碳酸盐岩覆盖的更新世-全新世沉积物所填充。萨勒诺河谷是一个半岩，由三个与第四纪海洋沉积物相对应的地震单元填充，覆盖在中新世硅质碎屑混沌序列上。 ud Agropoli大陆架第四纪海相演替的地层环境，位于蓬塔利科萨形态构造高点的海上，其特征是岩石声学基底的露头较宽，并且是由于构造地层单元向海延伸而形成的研究了奇伦托海角的邻近新兴地区。 ud最后，对马拉泰亚河谷大陆架和斜坡的例子进行了研究。考察了陆地的地质和构造环境与周围海上地震地层之间的关系。马拉泰亚河谷的地质框架与陆架和斜坡上的晚更新世和全新世地质演化有关，主要体现在第四纪晚期海平面冰川-欧几巴的波动。

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    Aiello Gemma; Marsella Ennio;

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  • 年度 2012
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  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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