Syn-rift deep-water muds and mudstones preserve a relatively complete stratigraphic record of tectonic and climatic events. This paper investigates mud-dominated deposits and stratigraphy using core from International Ocean Discovery Program (IODP) Expedition 381 sites M0078 and M0079 in the Gulf of Corinth, Greece. Millimetre-scale logging defined several bed types: homogeneous and laminated mud beds, bioturbated beds, a variety of graded beds, and rare matrix-supported conglomerates and slumps. Homogeneous muds and light grey to black laminated muds record deposition from distal, waning low density turbidity currents and terminal mud-rich quasi-laminar or laminar plug flows. Graded beds, interpreted as turbidites, range from beds several millimetre to a few centimetres of mud with silt to fine sand bases, to metre-scale mud beds with coarser sand and pebble bases. Conglomerate and slumped beds record cohesive debris flows, transitional flows and slope failure. Three stratal package types are distinguished: bioturbated, bedded and laminated, recording distinct hydrological conditions. Bioturbated packages record interglacial marine conditions with well oxygenated waters. Bedded packages record hemipelagic processes and low energy density underflows in a mainly dysoxic, stratified, lacustrine setting (glacial phases). In laminated packages, white mm-scale laminae of calcite or aragonite from varved, hemipelagic sediments demonstrating seasonal variability in a dysoxic non-marine or transitional setting. Rift stratigraphy is linked to eustatically controlled connections to the global ocean across rift segment boundaries. The ca. 780 to 330 ka succession is dominated by laminated packages with thin bioturbated packages and distinct conglomerates and slumps, suggesting high sills, making ocean connections brief and transitional to lacustrine conditions prolonged. The ca. 330 ka to present succession shows well developed bioturbated and bedded packages, separated by thin laminated packages, suggesting brief transitions and well-developed marine conditions due to lower sills. Results indicate that structurally controlled rift segment boundaries exert a first-order control on syn-rift stratigraphic evolution, with fault segment growth and linkage driving intra-rift facies and sequence variability.

中文翻译：

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希腊科林斯湾晚第四纪泥浆为主的盆底沉积：对深水沉积过程的意义和对同裂谷沉积的控制

同裂谷深水泥浆和泥岩保存了较为完整的构造和气候事件的地层记录。本文使用来自希腊科林斯湾的国际海洋发现计划 (IODP) 远征 381 地点 M0078 和 M0079 的岩心研究以泥浆为主的矿床和地层学。毫米级测井定义了几种床类型：均质和层状泥床、生物扰动床、各种梯度床，以及稀有的基质支撑砾岩和坍塌。均质泥浆和浅灰色至黑色层状泥浆记录了从远端、减弱的低密度浊流和末端富含泥浆的准层流或层流塞流的沉积。分级床层，被解释为浊积岩，范围从几毫米到几厘米的淤泥与细砂基的泥浆，到米级的泥层，沙子和卵石基层较粗。砾岩和坍塌床记录粘性泥石流、过渡流和斜坡破坏。区分了三种地层包类型：生物扰动、层状和层状，记录不同的水文条件。生物扰动包装记录间冰期海洋条件与充氧水。床层包记录了主要是缺氧、分层、湖泊环境（冰期）中的半远洋过程和低能量密度下溢。在层压包装中，方解石或霰石的白色毫米级薄片来自于瓦状的半远洋沉积物，显示出在缺氧的非海洋或过渡环境中的季节性变化。裂谷地层学与跨越裂谷段边界与全球海洋的海流控制连接有关。约。780 至 330 ka 连续以层压包装为主，具有薄的生物扰动包装和明显的砾岩和坍落，表明高地基，使海洋连接短暂，过渡到湖泊条件延长。约。330 ka 到现在的演替显示发育良好的生物扰动和层状包裹，由薄层压包裹隔开，表明由于较低的门槛，短暂的过渡和发达的海洋条件。结果表明，结构控制的裂谷段边界对同裂谷地层演化具有一级控制作用，断层段的生长和连接驱动了裂谷内相和层序变异。使海洋连接变得短暂，并延长了向湖泊条件的过渡。约。330 ka 到现在的演替显示发育良好的生物扰动和层状包裹，由薄层压包裹隔开，表明由于较低的门槛，短暂的过渡和发达的海洋条件。结果表明，结构控制的裂谷段边界对同裂谷地层演化具有一级控制作用，断层段的生长和连接驱动了裂谷内相和层序变异。使海洋连接变得短暂，并延长了向湖泊条件的过渡。约。330 ka 到现在的演替显示发育良好的生物扰动和层状包裹，由薄层压包裹隔开，表明由于较低的门槛，短暂的过渡和发达的海洋条件。结果表明，结构控制的裂谷段边界对同裂谷地层演化具有一级控制作用，断层段的生长和连接驱动了裂谷内相和层序变异。