Experimental Analysis of Foraminiferal Taphonomy: Implications for the Formation of Foraminiferal Assemblages: Collaborative Research

全新世碳酸盐陆架和盆地环境中有孔虫组合的死后蚀变将通过耐磨性、溶蚀性和输运性的实验分析来检验。此外，诸如生物侵蚀等生物过程的影响程度将通过分析它们沿水深梯度发生的频率来确定。这种分析将能够确定在特定环境制度下积累的组合中应该占主导地位的测试形态。这些数据将与以前沿陆上和海上穿越收集的数据进行比较，从而允许开发有孔虫岩相模型。结合现存物种的相对丰度和试验产量数据，这些结果将更好地阐明种群动态和地学过程对有孔虫沉积物组合形成的相对影响。基于试验形态而非单个物种确定有孔虫的锥相，适用于不同环境和时间间隔的有孔虫组合的古环境解释。本研究建立的深相模型将应用于更新世碳酸盐岩，从而为模型的检验和深相特征的可保存性的确定提供依据。

Post-mortem alteration of Holocene foraminiferal assemblages from carbonate shelf and basinal environments will be examined through experimental analyses of test resistance to abrasion, dissolution and transport. In addition, the magnitude of the effect of biotic processes, such as bioerosion, will be determined through analysis of the frequency of their occurrence along a bathymetric gradient. Such analyses will enable the determination of test morphotypes which should predominate within assemblages accumulating under particular environmental regimes. These data will be compared to collections made previously alongonshore to offshore traverses, thereby allowing the development of foraminiferal taphofacies models. When combined with data on the relative abundances of living species and test production rates, these results will better enable the elucidation of the relative effects of population dynamics and taphonomic processes in the formation of sediment assemblages of foraminifera. The determination of foraminiferal taphofacies based on test morphotypes, not individual species, has application to the paleoenvironmental interpretation of foraminiferal assemblages from different environments and time intervals. Taphofacies models developed by this study will be applied to Pleistocene carbonates, thereby providing tests of the models and the determination of the preservability of taphonomic signatures.