Comparative Diagenetic Analysis of Cambrian and Ordovician Sequences: Understanding Controls on the Pathway of Diagenesis Within Sequence-Stratigraphic Framework

将对两个大型层序的成岩作用进行研究， 田纳西州东部：1）一个沉积在斜坡设置期间， 中部文石/高镁方解石易化时间 晚寒武世，2）一个沉积在一个边缘平台， 中奥陶世为低镁方解石易化期。 对成岩历史与 层序地层格架的建立主要包括：1）进一步 两个层序中出现的相似岩性的比较（例如， （2）对一个或多个岩石独特的成岩研究， 其他序列（例如，潮下带“扁平卵石”砾岩 寒武纪），3）通过测量分析成岩历史 两个序列的部分。 薄片岩相学（极化 光和阴极发光），再加上分析，以及 成岩相微量样品（0.3-0.6 mg）同位素分析 和其他岩石成分将用于所有部分的 research. 地球化学数据将用于模拟质量转移 化学成分，以帮助了解流体流动过程中， 成岩作用 长期目标是建立成岩作用 格架（地层+成岩作用+时间）可比 详细介绍了古环境和层序地层 框架以前开发，并确定如何成岩 大规模层序的历史因背景而异， 地质年代

Diagenesis will be examined for two large scale sequences in eastern Tennessee: 1) one deposited in a ramp setting during a time of aragonite/high-magnesian-calcite facilitation in the Middle to Late Cambrian, and 2) one deposited on a rimmed platform during a time of low-magnesian calcite facilitation in Middle Ordovician. An understanding of the relationship between diagenetic history and sequence-stratigraphic framework will be developed by: 1) further comparison of similar lithologies occurring in both sequences (eg. oolite), 2) diagenetic studies of lithologies unique to one or the other sequence (eg. subtidal "flat-pebble" conglomerates of the Cambrian), and 3) analyses of diagenetic history through measured sections of both sequences. Thin-section petrography (polarized light and cathodoluminescent), coupled with analyses, as well as isotopic analysis of microsamples (0.3-0.6 mg) of diagenetic phases and other rock components will be used in all parts of the research. The geochemical data will be used to model mass transfer of chemical components to aid in understanding fluid flow during diagenesis. The long-term objective is to establish a diagenetic framework (stratigraphy + diagenetic processes + time) comparable in detail to the paleoenvironmental and sequence-stratigraphic framework previously developed, and to determine how the diagenetic history of large scale sequences differ depending on setting and geologic age.