Quantitative Analysis of Turbidites and Related Sediment Gravity Flow Deposits

浊积岩及相关沉积物重力流沉积物的定量分析

• 批准号: 9506574
• 负责人: John Grotzinger
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506574&HistoricalAwards=false
• 关键词: Quantitative; Analysis; Turbidites; Related; Sediment

Grotzinger 9506574 One year of funding is requested in order to support a pilot project designed to conduct quantitative tests of the scaling relationships of sediment gravity flow deposits. The plan is to test the hypothesis that the statistical distribution of bed thicknesses of subaqueous sediment gravity flow deposits with minimal erosional truncation and amalgamation should obey the power law N(h) h-B where N(h) is the number of layers of thickness greater than h and B is the scaling exponent (as suggested by Rothman et al, 1994). This indicates that, at least in some cases, sediment gravity flow deposition is scale invariant (fractal). We will determine (or at least devise a strategy for future research) whether power-law scaling for sediment gravity flow deposits represents an intrinsic dynamical property of the depositional system itself (e.g. self-organized criticality), or whether it indirectly reflects the power-law scaling of external, causal mechanisms (e.g. earthquakes, floods). Furthermore, if it can be demonstrated (regardless of its cause) that the sediment gravity flow triggering and deposition process is indeed scale invariant, then departures of bed thickness statistics from the predicted power law may possibly be interpreted as quantitative evidence of erosional and/or non-depositional processes that influence completeness of the stratigraphic record. The research effort itself will consist of a close collaboration between the PI's whose backgrounds are widely divergent, and a graduate research assistant. Several recently obtained data sets will be analyzed. Additional data will be collected that pertains specifically to the temporal scaling of sediment gravity flow deposits. Finally, data collection will proceed in parallel with development of new, physically-based theory that relates bed thickness, volume, and geometry. The results of this research will be of broad interest to members of the physics as well as earth science communities. Additionally, the rese arch has clear relevance to the petroleum industry where there is growing evidence that thin-bedded turbidite reservoirs may be of great economic importance.

Grotzinger 9506574要求提供一年的资金，以支持一个试点项目，旨在对沉积物重力流量沉积的缩放关系进行定量测试。 该计划是为了检验以下假设，即具有最小的侵蚀性截断和合并的底层沉积物重力流量沉积物的床厚度的统计分布应遵守功率n（h）H-b，其中n（h）是大于h和b的层层的数量，大于h，b是缩放指数（如Rothman Et，1994年ROTH MATH ETARING EDEMONEND（如Roth Et al，1994年）所建议的。 这表明至少在某些情况下，沉积物重力流量沉积是尺度不变（分形）。 我们将确定（或至少制定一种未来研究的策略），用于沉积物重力流量沉积物的幂律缩放是否代表沉积系统本身的固有动力学特性（例如自组织的关键性），还是间接反映了外部，因果机制的幂律缩放（例如地震，地震，洪水）。 此外，如果可以证明它（无论其原因如何），那么沉积物重力流触发和沉积过程确实是规模不变的，那么床厚度统计数据的偏离可能会被解释为影响曲层和/或非沉积过程的定量证据，这些证据影响了地层记录的完整性。 研究工作本身将包括PI的背景广泛不同的PI与研究生研究助理之间的密切合作。 将分析一些最近获得的数据集。 将收集其他数据，这些数据特别与沉积物重力流量沉积物的时间缩放有关。 最后，数据收集将与与床厚度，体积和几何形状相关的新的，物理的理论的发展并行进行。 这项研究的结果将引起物理成员以及地球科学社区的广泛关注。此外，Rese Arch与石油行业具有明显的相关性，在越来越多的证据表明，薄层的浑浊的水库可能具有很大的经济意义。