Mud volcanism and diapirism along the Japan Trench axis: evidence for a complex earthquake plumbing system on the down-going plate

IF 3.6 2区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Marine and Petroleum Geology Pub Date : 2025-09-05 DOI:10.1016/j.marpetgeo.2025.107597

Myra Keep , Troy Rasbury , Cecilia McHugh , Michael Strasser , Ken Ikehara , Charlotte Pizer , Yasuyuki Nakamura

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引用次数: 0

Abstract

Mud volcanoes occur in a variety of geodynamic settings, and are common in subduction zones, usually within the accretionary prism. Although mud volcanism occurs along the Ryukyu Trench in southern Japan, no such activity has been documented along the Japan Trench. Sub-bottom profile data from International Ocean Discovery Program Expedition 386 show acoustically anomalous features in the basin-fill stratigraphy consistent with mud diapirism and mud volcanism along the Japan Trench. Unusually these features occur in basins along the trench axis itself, and not primarily as part of the accretionary complex. We present evidence for diapirism along ∼600 km of the Japan Trench and for mud volcanoes in the central and northern part of the trench. Mud diapirism and nearby igneous volcanic activity shows close spatial relationships to flexural faults on the down-going plate, which may provide the plumbing system for mobile muds to reach the surface.

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沿日本海沟轴线的泥火山作用和底辟作用：下行板块上复杂地震管道系统的证据

泥火山发生在各种地球动力学环境中，在俯冲带中很常见，通常在增生棱镜内。虽然在日本南部的琉球海沟有泥火山活动，但在日本海沟没有记录到这样的活动。国际海洋发现计划（International Ocean Discovery Program Expedition 386）的海底剖面资料显示，日本海沟沿岸盆地充填地层的声学异常特征与泥底辟作用和泥火山作用一致。不同寻常的是，这些特征出现在沿海沟轴线本身的盆地中，而不是主要作为增生复合体的一部分。我们提供了沿日本海沟约600公里的底辟作用和海沟中部和北部泥火山的证据。泥浆底辟作用和附近火成岩火山活动与下行板块上的弯曲断裂有密切的空间关系，这可能为流动泥浆到达地表提供了管道系统。

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来源期刊

Marine and Petroleum Geology 地学-地球科学综合

CiteScore

8.80

自引率

14.30%

发文量

475

审稿时长

63 days

期刊介绍： Marine and Petroleum Geology is the pre-eminent international forum for the exchange of multidisciplinary concepts, interpretations and techniques for all concerned with marine and petroleum geology in industry, government and academia. Rapid bimonthly publication allows early communications of papers or short communications to the geoscience community. Marine and Petroleum Geology is essential reading for geologists, geophysicists and explorationists in industry, government and academia working in the following areas: marine geology; basin analysis and evaluation; organic geochemistry; reserve/resource estimation; seismic stratigraphy; thermal models of basic evolution; sedimentary geology; continental margins; geophysical interpretation; structural geology/tectonics; formation evaluation techniques; well logging.