COLLABORATIVE RESEARCH: Integrated Paleoceanographic Analysis of the Late Paleozoic Midcontinent Sea

合作研究：晚古生代中大陆海洋的综合古海洋学分析。美国辛辛那提大学thomas Algeo，德克萨斯理工大学james Barrick，宾夕法尼亚州立大学bernd Haupt，[摘要]由于古代环境条件和古地理背景的不同，一些过去的沉积环境没有很好的现代相似物。例如，以前对黑页岩沉积环境条件的解释集中于应用现代海岸上升流或？黑海类型?盆地地形。然而，最近提出了一种超河口环流模式来解释北美大陆中部丰富而广泛的古生代黑色页岩沉积。本研究项目的目的是使用跨学科的方法来调查北美大陆中部宾夕法尼亚环流沉积期间的古海洋学条件，并测试？超级河口循环假说？这项工作是一项全面的数据模型综合研究，地球化学指标（生物磷灰石的锶和氧同位素、大量主要和微量元素丰度数据、TOC-TIC-S浓度和岩石学数据）将与生物相分布模式和数值海洋环流模型的结果进行比较。资金为几所大学的本科生提供研究机会，并将支持一篇博士论文。

COLLABORATIVE RESEARCH: Integrated Paleoceanographic Analysis of the Late Paleozoic Midcontinent SeaAchim Herrmann, Arizona State University. EAR-1052988Thomas Algeo, Univ. Cincinnatti, EAR-1053449James Barrick, Texas Tech University, EAR-1053042Bernd Haupt, Penn State University, EAR-1052998ABSTRACTDue to different environmental conditions and paleogeographic settings of ancient times, some past sedimentary environments have no good modern analogues. For instance, previous interpretations of environmental conditions of black shale deposition centered on applying modern analogs of coastal upwelling or ?Black-Sea type? silled basin topographies. However, a superestuarine circulation model has been proposed recently to explain the abundant and widespread Paleozoic black shale deposits of Midcontinent North America. It is the purpose of this research project to use an interdisciplinary approach to investigate paleoceanographic conditions during the deposition of Pennsylvanian cyclothems of Midcontinent North America and to test the ?superestuarine circulation hypothesis?. This work is a comprehensive data-model synthesis study and geochemical proxies (strontium and oxygen isotopes of biogenic apatite; bulk major- and trace-element abundance data, TOC-TIC-S concentrations, and petrographic data) will be compared to biofacies distribution patterns and to results of numerical ocean circulation models. Funding provides research opportunities for undergraduates at several universities and will support one PhD thesis.