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Multiproxy study of cores from the Garigliano Plain: An insight into the Late Quaternary coastal evolution of Central-Southern Italy
Palaeogeography, Palaeoclimatology, Palaeoecology ( IF 3 ) Pub Date : 2021-02-13 , DOI: 10.1016/j.palaeo.2021.110298
Giuseppe Aiello , Vincenzo Amato , Pietro P.C. Aucelli , Diana Barra , Giuseppe Corrado , Paola Di Leo , Halinka Di Lorenzo , Brian Jicha , Gerardo Pappone , Roberta Parisi , Paola Petrosino , Elda Russo Ermolli , Marcello Schiattarella

Two boreholes, both about 16 m-deep, have been drilled in the Garigliano Plain, a coastal-alluvial plain located at the boundary between southern Latium and northern Campania, Italy. The drill holes have been planned and carried out in the southern part of the plain, near to the bordering ridge of Mount Massico. The multidisciplinary analyses performed on sediment samples from both cores revealed the presence of several marine and continental sedimentation environments, transitional facies and volcanic rocks. All these data, together with the stratigraphic correlation between the two logs, allowed the reconstruction of the sedimentary and morphological evolution of the plain during the Late Quaternary. Further, such an evolutionary sequence has been used as a comparison scheme with regard to other coastal plains of the Tyrrhenian side of central and southern Italy to stress similar or different behaviours among them on a distance of about 400 km of coastal belt. Some remarkable differences have been actually enlighten, with particular reference to the MIS 5.5 and the Holocene.

The occurrence in both cores of products of the Campanian Ignimbrite – a ~ 40 ka pyroclastic unit – and associated reworked deposits (about five metres-thick in both cases), has been here reported for the first time in the subsurface of the southern part of the Garigliano Plain. In addition, a tephra layer has been detected at −14.50 m of depth (i.e. 13.50 m a.s.l.) in the northernmost core. This layer has been 40Ar/39Ar dated at 124.5 ± 0.5 ka. In the upper part of the same drill core, deposits interpreted as lagoonal-swamp facies have been recognized. On the basis of 14C dating, we can attribute the starting stage of such a sedimentation to the effects induced by the Post-glacial sea-level rise at about 8000 yr BP. These chronological constraints permitted us to obtain from the paleoecological, palynological, and granulometric analyses of the sampled successions helpful and precise information about sea-level changes along that coastal belt.



中文翻译:

加里利亚诺平原岩心的多代理研究:对意大利中南部晚期第四纪沿海演化的认识

Garigliano平原已经钻了两个约16 m深的钻孔,Garigliano平原是一个沿海冲积平原,位于意大利南部Latium和北部Campania之间的边界。在平原的南部,靠近马西科山的山脊,已经计划并实施了钻孔。对来自两个岩心的沉积物样品进行的多学科分析表明,存在几种海洋和大陆沉积环境,过渡相和火山岩。所有这些数据,加上两个测井曲线之间的地层相关性,可以重建第四纪晚期的平原沉积和形态演化。进一步,对于意大利中部和南部第勒尼安河沿岸的其他沿海平原,这种演化序列已被用作比较方案,以在距海岸带约400 km的距离上强调它们之间相似或不同的行为。实际上已经启迪了一些显着的差异,特别是MIS 5.5和全新世。

坎帕尼Ignimbrite(约40 ka的火山碎屑单元)及其相关的返工矿床(在两种情况下均约5米厚)的两个核心产品中均已发现,这是该地区南部地下的首次报道。加里利亚诺平原。此外,在最北端的岩心中,在-14.50 m的深度(即13.50 m asl)处发现了特非拉层。该层为40 Ar / 39 Ar,日期为124.5±0.5 ka。在同一钻芯的上部,已识别出被解释为泻湖沼泽相的沉积物。在14的基础上C测年,我们可以将这种沉积的开始阶段归因于大约8000年BP后冰期后海平面上升引起的影响。这些按时间顺序排列的限制条件使我们能够从采样演替的古生态学,古生物学和粒度分析中获得有关该沿海带海平面变化的有用且精确的信息。

更新日期:2021-02-21
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