沿达尔马提亚型海岸(亚得里亚海,洛希尼海峡)第四纪古环境的高分辨率地震记录

IF 2.6 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY Marine Geology Pub Date : 2024-05-25 DOI:10.1016/j.margeo.2024.107325
Dea Brunović , Ozren Hasan , Slobodan Miko , Nikos Georgiou , Maria Geraga , Dimitris Christodoulou , Xenofon Dimas , Nikolina Ilijanić , George Papatheodorou
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引用次数: 0

摘要

沿海系统因第四纪冰川-间冰期的变化而发生了巨大变化。在此,我们首次对亚得里亚海洛希尼海峡的地貌特征和第四纪晚期沉积动力学进行了详细评估。本研究试图在沉积岩芯数据的基础上,利用高分辨率地震记录来解析复杂的环境演变。在这个沿海岩溶盆地内,第四纪期间积累了大量沉积物。值得注意的是,我们发现了几种突出的侵蚀和沉积环境。我们区分了可能自海洋同位素阶段(MIS)6 以来反复出现的河流-湖泊沉积和海洋沉积。保存下来的记录包括冰川期的侵蚀特征和近平行及斜反射体(地震单元 SU-II、SU-IV 和 SU-V)。间冰期单元在声学上是半透明的,一般没有反射(地震单元 SU-I 和 SU-III)。海平面和气候变化、岩屑深度和岩溶水文的相互影响促成了 Lošinj 海峡的环境变化。事实证明,该地区对第四纪研究非常重要,因为它包含至少跨越中更新世和晚更新世以及全新世的漫长沉积物演替。我们的研究对评估类似海岸环境的长期古环境演变和重建区域古地理学具有重要意义,而区域古地理学又对了解史前人类的占领和/或迁移至关重要。这是亚得里亚海为数不多的保存完好的记录之一,有助于深入了解自倒数第二个冰期以来的水下地貌和海平面。
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High-resolution seismic record of the Quaternary palaeoenvironments along a Dalmatian-type coast (Lošinj Channel, Adriatic Sea)

Coastal systems have changed considerably in response to Quaternary glacial–interglacial variability. Here, we offer the first detailed assessment of geomorphic features and late Quaternary sedimentation dynamics in the Lošinj Channel in the Adriatic Sea. The present study attempts to resolve the complex evolution of the environments by applying high-resolution seismic records that build upon sediment core data. Within this coastal karst basin, a significant amount of sediment accumulated during the Quaternary. Notably, the existence of several prominent erosional and depositional environments was revealed. We distinguished recurrent episodes of fluvio-lacustrine and marine sedimentation that probably occurred since Marine Isotope Stage (MIS) 6. The preserved record consists of erosional features and subparallel and oblique reflectors attributed to glacial periods (Seismic Units SU-II, SU-IV, and SU-V). Interglacial units are acoustically semitransparent and generally reflection-free (Seismic Units SU-I and SU-III). The mutual influence of sea level and climate change, sill depth, and karst hydrology enabled environmental changes in the Lošinj Channel. The area proves to be important for Quaternary studies because it contains a long sediment succession spanning at least the middle and late Pleistocene and Holocene. Our study has implications for the assessment of the long-term palaeoenvironmental evolution of similar coastal settings and reconstruction of the regional palaeogeography which is in turn crucial for understanding prehistoric human occupation and/or dispersal. This is one of the few well-preserved records in the Adriatic Sea that provides insight into submerged landscapes and sea levels since the penultimate glacial.

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来源期刊
Marine Geology
Marine Geology 地学-地球科学综合
CiteScore
6.10
自引率
6.90%
发文量
175
审稿时长
21.9 weeks
期刊介绍: Marine Geology is the premier international journal on marine geological processes in the broadest sense. We seek papers that are comprehensive, interdisciplinary and synthetic that will be lasting contributions to the field. Although most papers are based on regional studies, they must demonstrate new findings of international significance. We accept papers on subjects as diverse as seafloor hydrothermal systems, beach dynamics, early diagenesis, microbiological studies in sediments, palaeoclimate studies and geophysical studies of the seabed. We encourage papers that address emerging new fields, for example the influence of anthropogenic processes on coastal/marine geology and coastal/marine geoarchaeology. We insist that the papers are concerned with the marine realm and that they deal with geology: with rocks, sediments, and physical and chemical processes affecting them. Papers should address scientific hypotheses: highly descriptive data compilations or papers that deal only with marine management and risk assessment should be submitted to other journals. Papers on laboratory or modelling studies must demonstrate direct relevance to marine processes or deposits. The primary criteria for acceptance of papers is that the science is of high quality, novel, significant, and of broad international interest.
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