Diagenesis of Sandstones and Limestones in the Foreland Shelf of Kansas

宾夕法尼亚纪和二叠纪期间，伴随着沃希托造山运动，加热的盐水进入美国中部大陆的前陆陆架沉积物。 水同时带来热量和可能的其他成分，促进前陆地区的成岩作用，并有助于石油和矿藏的形成。 涉及浅层热水横向运动的成岩作用场景与大多数模型不同。 这项研究将试图确定这种区域加热对于堪萨斯州东南部宾夕法尼亚中晚期砂岩和石灰岩的重要性。 早期的研究表明，那里的石灰岩和砂岩在晚期成岩作用过程中分别起作用，由不同来源的成分形成巴洛克白云石状胶结物。 拟议的研究将为小型试验区开发成岩模型。 该模型将评估区域事件和局部控制对该地区成岩作用的重要性，并将整合成岩作用、砂岩和石灰岩。 研究将包括光学、阴极发光和背散射电子显微镜，以研究成岩阶段和胶结物地层学的关系。 流体包裹体、同位素和微量元素数据将确定成岩作用和成分来源的条件。

Entry of heated brines into foreland shelf sediments of the US Midcontinent accompanied the Ouachita orogeny during the Pennsylvanian and Permian. The water brought heat and possibly other constituents at the same time to promote diagenesis in foreland areas and contributed to formation of oil and mineral deposits. A diagenetic scenario involving lateral motion of hot water at shallow depths differs from most models. This research will attempt to establish the importance of this regional heating for Middle and Late Pennsylvanian sandstones and limestones in southeastern Kansas. Earlier work has shown that limestones and sandstones there acted separately during late diagenesis, forming baroque dolomite-like cements from constituents derived from different sources. The proposed research will develop a diagenetic model for a small pilot area. The model will assess the importance of regional events and local controls in diagenesis of the area and will integrate diagenesis and sandstones and limestones. Research will include optical, cathodoluminescence, and back- scattered electron microscopy to investigate relations of diagenetic phases and stratigraphy of the cements. Fluid inclusion, isotope, and trace-element data will establish conditions of diagenesis and sources of constituents.