Cyclic Carbonates and Vail-Sequences on Carbonate Platforms:A Field and Modelling Study

我们将详细记录，并测试证据， 旋回性、晚寒武世经典地层剖面 和密西西比州的美国西部，我们将研究如何1 到10M周期可以封装成更大规模（1到10M. Y.）。 持续时间）维尔型序列，利用一个新的应用程序， Fischer（1964年）首次使用该技术来定义短期 相对海平面的变化。 该技术提供了一种 定义海平面与下沉的强大、客观的方法 1至10百万年的影响规模，并允许识别序列 环状碳酸盐的边界。 我们将运行一维 计算机模拟的地层序列记录在 场和二维模拟，以生成地层 可与实际横截面进行比较的横截面 显示了岩石的米级、垂直和横向变化 类型 我们的模型能够利用复杂的海平面 曲线生成均衡平衡，模拟 显示岩石变化的地层剖面和横剖面. 这是研究碳酸盐循环所必需的米级尺度。 我们 将对深水相进行光谱分析， 以确定是否有米兰科维奇的记录 深水相的气候变化。 计算机 模拟将受到地质数据的约束。 这 这种方法应该让我们更坚定地理解 碳酸盐岩旋回如何在碳酸盐岩台地上排列， 它们被包装在Vail序列中，以及各种类型的 异环和自环机制控制着它们的发育， 古生代 研究将记录气候变化的影响 和海平面变化对沉积岩堆积的影响。

We will to log in detail, and test for evidence of cyclicity, classic stratigraphic sections in the Late Cambrian and Mississippian of the western U.S. We will examine how the 1 to 10 m cycles may be packaged into larger scale (1 to 10 m.y. duration) Vail-type sequences, utilizing a new application of a technique first used by Fischer (1964), to define short term changes in relative sea level. The technique provides a powerful, objective method of defining eustatic vs. subsidence effects at 1 to 10 m.y. scale, and allows recognition of sequence boundaries in cyclic carbonates. We will run 1-dimensional computer simulations of the stratigraphic sequences logged in the field, and 2-dimensional simulations to generate stratigraphic cross-sections that may be compared with actual cross-sections showing meter scale, vertical as well as lateral changes in rock types. Our models are capable of utilizing complex sea level curves to generate isostatically balanced, simulated stratigraphic sections and cross-sections showing rock changes at the meter-scale, necessary for a study of carbonate cycles. We will perform spectral analysis on deeper water facies in the sequences to determine if there is any record of Milankovitch climatic changes in the deeper water facies. The computer simulations will be constrained with geological data. This approach should provide us with a much firmer understanding of how carbonate cycles are arranged on carbonate platforms, how they are packaged in Vail-sequences, and how the various types of allocyclic and autocyclic mechanisms control their development in the Paleozoic. Research will document the effects of climatic and sea level change on the accumulation of sedimentary rocks.