Collaborative Research: Community-Based 3D Imaging That Ties Clinoform Geometry to Facies Successions and Neogene Sea-Level Change

该项目的主要目标是约束将边缘地层记录的演化和保存与基准面变化联系起来的复杂强迫函数。这些过程包括海水沉降、气候和古海洋变化、构造作用、压实作用和沉积物供应速率。现有钻孔数据将提供岩石地层学、地质年代学和古水深测量。水平切片（以及其他3D成像工具）揭示的地貌学将识别诊断特征，如河流系统、海岸线、三角洲通道、沉积物破坏疤痕等，这些特征都无法在现有的2D地震数据中得到解决，无法在倾斜地形翻滚附近绘制移动的浅水沉积环境。为了广大用户群体的整体利益，pi将在R/V Marcus Langseth上协调并获取包括新泽西州（NJ）大陆边缘内中部大陆架上三个IODP钻井点的3D地震数据。数据将提供给参与的科学界，作为后续的基础，PI驱动的建议，特别是提高对形成新泽西边缘的因素的理解，以及对大陆边缘沉积记录的影响。3D地震成像技术现在可以应用于NJ边缘，将这些采样记录置于空间精确、地层学有意义的环境中。这样的图像将使研究人员能够以以前无法达到的分辨率和信心绘制钻探地点周围的序列，并分析其空间/时间演变。目标包括：1)确定已知冰库基准面变化对地层记录的影响；2)进一步了解近岸环境对全球海平面高度变化的响应（特别是与当前持续上升有关）；3)确定中新生代全球海平面变化的幅度/时间，这将有助于人类将人为基准面变化置于适当的长期背景下。该项目将协同科学界参与，并为所有用户生成可广泛获取的数据。学生和早期职业科学家将指导和参与巡航。这些pi将制作由罗格斯地质博物馆主办的展览和/或讲座。由于新泽西州近海沉积记录的来源向墨西哥湾提供了类似的沉积物脉冲，因此增加对新泽西州陆架演化的了解可能有助于改进墨西哥湾的油气勘探策略。

The primary goal of this project is to constrain the complex forcing functions tying evolution and preservation of the margin stratigraphic record to base-level changes. These processes include eustasy, climatic and paleooceanographic variations, tectonism, compaction and rates of sediment supply. Existing borehole data will provide lithostratigraphy, geochronology and paleobathymetry. Geomorphology revealed by horizontal slices (among other 3D imaging tools) will identify diagnostic features such as river systems, shorelines, delta channels, sediment failure scars, etc., none of which can be resolved in existing 2D seismic data to the degree required to map shifting shallow-water depositional settings in the vicinity of clinoform rollovers. For the general benefit of a broad user community the PIs will coordinate and acquire a 3D seismic data encompassing the three IODP drillsites on the inner-middle shelf of the New Jersey (NJ) continental margin on R/V Marcus Langseth. Data will be made available to the engaged scientific community to use as the foundation of follow-on, PI- driven proposals that improve understanding of factors shaping the NJ margin in particular, and that imprint the sedimentary record at continental margins in general. 3D seismic imaging can now be applied to the NJ margin to put these sampled records in a spatially accurate, stratigraphically meaningful context. Such imagery will allow researchers to map sequences around drill sites with a resolution and confidence previously unattainable, and to analyze their spatial/temporal evolution. Objectives include: 1) establishing the impact of known Ice House base-level changes on the stratigraphic record; 2) providing greater understanding of the response of near-shore environments to changes in elevation of global sea level (with special relevance to the current relentless rise), and 3) determining the amplitudes/timing of global sea-level changes during the mid-Cenozoic, which should help humanity put anthropogenic base-level change in a proper long-term context. Broader Impacts The project will collaboratively engage the scientific community and generate widely accessible data for all users. Students and early-career scientists will be mentored and involved in the cruise. The PIs will produce exhibits and/or lectures hosted by the Rutgers Geology Museum. Since the source of the sedimentary record offshore New Jersey fed a similar pulse of sediments into the Gulf of Mexico, increasing knowledge of the evolution of the NJ shelf may help improve strategies for hydrocarbon exploration in the Gulf.