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

合作研究：亚利桑那州立大学阿希姆·赫尔曼晚古生代中大陆海洋的综合古海洋学分析。EAR-1052988托马斯·阿尔乔，大学Cincinnatti，EAR-1053449美国德克萨斯理工大学James Barrick，EAR-1053042 Bernd Haupt，宾夕法尼亚州立大学EAR-1052998由于古代不同的环境条件和古地理环境，一些过去的沉积环境没有良好的现代相似性。例如，以前对黑色页岩沉积环境条件的解释集中在应用现代海岸上升流或黑海型？有窗槛的盆地地形。然而，最近提出了一个河口上环流模型来解释北美中大陆丰富而广泛的古生代黑色页岩矿床。这项研究的目的是用跨学科的方法研究北美中大陆宾夕法尼亚旋回沉积过程中的古海洋条件，并检验河口上环流假说。这项工作是一项综合性的数据模型综合研究，并将地球化学指标(生物成因磷灰石的锶和氧同位素；大量常量和微量元素丰度数据、总有机碳-总有机碳-S浓度和岩石学数据)与生物相分布模式和海洋环流数值模型的结果进行比较。基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.