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

这个项目的主要目标是限制复杂的强制功能绑定的演变和保存的边缘地层记录基准面的变化。这些过程包括地壳运动、气候和古海洋学变化、构造作用、压实作用和沉积物供应速率。现有的钻孔数据将提供岩石地层学、地质年代学和古水深测量。通过水平切片（以及其他3D成像工具）揭示的地貌将识别诊断特征，如河流系统、海岸线、三角洲河道、沉积物破坏疤痕等，在现有的2D地震数据中，没有一个可以被解析到绘制在斜坡翻转附近的移动浅水沉积环境所需的程度。为了广大用户群体的整体利益，PI将协调和采集三维地震数据，包括R/V Marcus Langseth上新泽西（NJ）大陆边缘中内陆架上的三个IODP钻探点。将向参与的科学界提供数据，以作为后续、PI驱动的建议的基础，这些建议将提高对特别是影响新泽西边缘的因素的理解，并在大陆边缘留下一般沉积记录的印记。三维地震成像现在可以应用于新泽西州的边缘，把这些采样记录在空间上准确，地层意义的背景下。这种图像将使研究人员能够以以前无法达到的分辨率和置信度绘制钻井现场周围的序列，并分析其空间/时间演变。目标包括：1）确定已知冰室基准面变化对地层记录的影响; 2）更好地了解近岸环境对全球海平面升高的反应（与当前的持续上升特别相关），以及3）确定新生代中期全球海平面变化的幅度/时间，这应该有助于人类把人为的基准变化放在一个适当的长期背景下。更广泛的影响该项目将与科学界合作，为所有用户提供可广泛获取的数据。学生和早期职业科学家将得到指导，并参与巡航。PI将制作由罗格斯地质博物馆主办的展览和/或讲座。由于新泽西近海沉积记录的来源向墨西哥湾注入了类似的沉积物脉冲，因此增加对新泽西陆架演变的了解可能有助于改善墨西哥湾油气勘探的策略。

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.