The Structural Features and Development of the Marine Accumulative Terrace in Avachinsky Gulf near the Prilivnaya River (Kamchatka)

IF 0.9 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Journal of Volcanology and Seismology Pub Date : 2026-02-16 DOI:10.1134/S0742046325700502

F. I. Batanov, O. V. Bergal-Kuvikas, A. L. Khomchanovsky, S. E. Borisovskiy, D. R. Lukashenko

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Abstract

The structure of a marine accumulative terrace has been studied and the stages of its Holocene development have been reconstructed. The approximate age of the beach ridges and their average rates of accumulation (progradation) in the Prilivnaya River valley have been determined. The tephrochronological scale for the study area has been refined: tephra layers were identified and correlated within the peat-pyroclastic cover. In addition to regional marker horizons (KSht₃, OP, and KS₁), layers associated with eruptions of Avachinsky Volcano were identified based on chemical analysis. The oldest tephra layer is approximately 5400 years old. Geological evidence of an ancient strong subduction earthquake was discovered, manifested as a buried erosional scarp no older than 1400 years. Mathematical models of the morpholithodynamics of the Avachinsky Gulf coast were developed. The modern sedimentation parameters of the coastal zone were established. The proximity to Petropavlovsk-Kamchatsky, the area’s popularity, and the presence of a tsunami hazard zone underscore the relevance of this study.

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堪察加半岛priilivnaya河附近Avachinsky湾海相堆积阶地的构造特征及发育

研究了海相堆积阶地的构造，重建了其全新世发育阶段。已经确定了普利里夫纳亚河流域海滩山脊的大致年龄及其平均堆积（进积）速度。对研究区域的泥层年代学尺度进行了细化：在泥炭-火山碎屑盖层内确定了泥层并进行了对比。除了区域标志层（KSht3， OP和KS1）外，还通过化学分析确定了与阿瓦钦斯基火山喷发有关的层。最古老的热层大约有5400年的历史。发现了古强俯冲地震的地质证据，表现为距今不超过1400年的埋藏侵蚀陡坡。建立了阿瓦钦斯基湾海岸形态岩石动力学的数学模型。建立了近岸带现代沉积参数。邻近堪察加彼得罗巴甫洛夫斯克，该地区的知名度，以及海啸危险区的存在强调了这项研究的相关性。

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来源期刊

Journal of Volcanology and Seismology 地学-地球化学与地球物理

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Volcanology and Seismology publishes theoretical and experimental studies, communications, and reports on volcanic, seismic, geodynamic, and magmatic processes occurring in the areas of island arcs and other active regions of the Earth. In particular, the journal looks at present-day land and submarine volcanic activity; Neogene–Quaternary volcanism; mechanisms of plutonic activity; the geochemistry of volcanic and postvolcanic processes; geothermal systems in volcanic regions; and seismological monitoring. In addition, the journal surveys earthquakes, volcanic eruptions, and techniques for predicting them.