Diagenesis of Sandstones and Limestones in the Foreland Shelf of Kansas

加热盐水进入美国中部大陆前陆陆架沉积物伴随着宾夕法尼亚和二叠纪的瓦希托造山运动。水同时带来了热量和可能的其他成分，促进了前陆地区的成岩作用，并有助于形成石油和矿藏。涉及浅层热水横向运动的成岩情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堪萨斯州东南部宾夕法尼亚州中晚期砂岩和石灰石的重要性。早期的研究表明，石灰岩和砂岩在晚期成岩作用中分别作用，形成了来自不同来源的巴洛克白云岩状胶结物。拟议的研究将在一个小的试点地区建立一个成岩模型。该模型将评估区域事件和局部控制在该地区成岩作用中的重要性，并将成岩作用与砂岩和灰岩相结合。研究将包括光学、阴极发光和背散射电子显微镜来研究胶结物的成岩阶段与地层的关系。流体包裹体、同位素和微量元素数据将确定成岩作用条件和成分来源。

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.