Physical Rock Properties and the Geothermal Field of the Chesapeake Bay Impact Structure

在切萨皮克湾（Chesapeake Bay）撞击构造的盆地内部，对岩心密集取样的各种岩石物理性质进行广泛的实验室测量，并在钻孔中进行高分辨率温度测量，这一联合方法将有助于更好地了解撞击对岩石物理性质以及对地热和水力场的影响。在矿物学和结构分析的支持下，实验岩石物理数据将通过数值模拟和不同参数之间的相关性来解释岩石的内部结构，并用于校准和控制地球物理钻孔测井，以及对地球物理解释和冲击结构建模的约束。通过密集测量的热导率，将确定热流密度及其垂直变化，并根据传导和对流热传输来解释。瞬态条件下的井眼温度测井将提供有关裂缝带的信息，有助于研究冲击结构的水力状态。

A joint approach of extensive laboratory measurements of various physical rock properties on densely sampled cores and high resolution temperature measurements in the borehole, drilled in the inner basin of the Chesapeake Bay impact structure, will contribute to a better understanding of the influence of the impact on the petrophysical properties and on the geothermal and hydraulic fields. The experimental petrophysical data, supported by mineralogical and structural analysis, will be interpreted with respect to the internal structure of rocks by numerical modeling and by correlations between different parameters and used for calibration and control of geophysical borehole logs, as well as for constraints to geophysical interpretation and modeling of the impact structure. By means of densely measured thermal conductivity the heat flow density and its vertical variations will be determined and interpreted in terms of conductive and advective heat transport. Borehole temperature logs during transient conditions will provide information about fracture zones, contributing to the study of the hydraulic regime of the impact structure.