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首页> 外文学位 >Upper middle to upper Miocene seismic sequences, New Jersey middle to outer continental shelf.
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Upper middle to upper Miocene seismic sequences, New Jersey middle to outer continental shelf.

机译：中新世上至中新世地震序列，新泽西中到外大陆架。

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摘要

The Miocene stratigraphic succession on the middle to outer continental shelf off New Jersey, immediately south of the Hudson Canyon, is examined using high-resolution 2D multichannel seismic (MCS) and log data to evaluate sequence stratigraphic models, aided by results of Integrated Ocean Drilling Program (IODP) Expedition 313. High sedimentation, associated with extensive progradation and aggradation, provides a higher resolution record in this region than elsewhere on the shelf. The study of 29 MCS profiles and 4 gamma-ray logs identified and loop- correlated 14 Miocene sequences. Based on log interpretations, highstand systems tracts are associated with most of these 14 sequences; only 3 (sequences A, C, D) exhibit lowstand and transgressive systems tracts.;Topset and foreset deposits on the middle to outer continental shelf are thicker than those on the inner shelf due to pronounced aggradation and progradation. This pattern is attributed to middle to late Miocene deltaic progradation and migration combined with sediment compaction and loading that created the accommodation space for these especially thick shallow-marine deposits.;Seismic profiles provide a means of anticipating sedimentary facies based on the vertical and lateral arrangement of reflectors within sequences, even in the absence of geologic samples and wireline log measurements. This study evaluates models of sequence stratigraphic evolution by utilizing high sedimentation rates, gamma-ray logs and seismic profiles available in this area. Sequence A shows the importance of drill site data. Using cores and logs, IODP Exp313 showed the maximum flooding surface is the first major downlap surface within sequence A, implying this interval is dominated by thick highstand deposits. By contrast, the widely cited Exxon model predicts that this and all sequences have thick lowstand units containing multiple flooding surfaces, overlain by comparatively thin highstand deposits. Furthermore, the present study showed not all sequences are alike. Shell-632 gamma-ray data reveals thick lowstand and transgressive strata in sequence D, and thin highstand strata consistent with the Exxon model. In contrast, many other sequences examined here have thin lowstand and transgressive systems tracts either below seismic resolution or absent, and thick highstand systems tracts that agree with the model built on Expedition 313 studies.
机译：利用高分辨率二维多通道地震（MCS）和测井数据，在综合海洋钻探结果的辅助下，对位于哈德逊峡谷以南的新泽西州中部至外陆架的中新世地层演替进行了研究。方案（IODP）远征313.与广泛的蓄积和积聚有关的高沉降，在该地区比在架子上其他地方的分辨率更高。对29个MCS剖面和4个伽马射线测井的研究确定并与环相关的14个中新世序列。根据测井解释，高架系统域与这14个序列中的大多数相关联。仅3个（A，C，D序列）表现出低位和海侵系统道段;中部至外大陆架的顶部和前兆沉积物比内陆架的要厚，这是由于明显的积聚和增生所致。这种模式可归因于中新世中晚期到晚期的三角洲发育和迁移，加上泥沙的压实和载荷，为这些特别厚的浅海沉积物提供了容纳空间。地震剖面提供了一种基于垂直和横向排列来预测沉积相的手段。甚至在没有地质样品和电缆测井测量的情况下，也可以在序列中测量反射器。这项研究通过利用该地区的高沉积速率，伽马射线测井和地震剖面评估了层序地层演化模型。顺序A显示了钻探现场数据的重要性。 IODP Exp313使用岩心和测井资料显示，最大的淹水面是序列A中的第一个主要下沉面，这意味着该区间主要由厚的高架沉积物主导。相比之下，被广泛引用的埃克森（Exxon）模型预测，该序列和所有层序均具有较厚的低位单元，其中包含多个泛洪面，并被相对较薄的高位沉积物所覆盖。此外，本研究表明并非所有序列都是相似的。 Shell-632的伽玛射线数据揭示了层序D中厚的低层和海侵层，以及与埃克森美孚模型一致的薄高层。相比之下，此处检查的许多其他序列具有低于地震分辨率或不存在的薄低位和海侵系统道，并且厚厚的高位系统道与基于Expedition 313研究建立的模型一致。

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  • 作者

    Degirmenci, Tuce.;

  • 作者单位

    Rutgers The State University of New Jersey - New Brunswick.;

  • 授予单位 Rutgers The State University of New Jersey - New Brunswick.;
  • 学科 Geology.
  • 学位 M.S.
  • 年度 2014
  • 页码 122 p.
  • 总页数 122
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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