Collaborative Research: Heat Flow and Hydrothermal Transport in the Panama Basin Linked with Geophysical and Oceanographic Data

研究哥斯达黎加裂谷轴和海洋钻探方案504b孔之间地壳和海洋之间的热液热流和物质通量旨在帮助开发一个综合的地壳-热液-海洋环流模型。将沿着一条300公里长的走廊测量热流，作为一个大型多学科、多机构项目的组成部分，该项目名为OSCAR(轴向山脊热液热液散热和蚀变的海洋和地震特征)。结合将指导评估扩张轴上的热液通量的海洋羽流测绘，新的热流结果将显示传导通量如何随着板块的老化而变化，特别是在哪里发生从聚焦的高流速流动向扩散的低通量循环的转变。这是大洋中脊研究中一个长期存在的问题。将评估被破坏的地下室结构对当地热流的影响。美国科学家将与领导主要项目的英国和德国同事密切合作。增加热流采集能够解决海脊间第三个十年计划的一个主要主题--地壳和深海之间的热量和化学交换。主要培训是分析建模的女研究生将获得海上数据采集的经验，接触国际科学家，并深入了解仅使用表面数据来约束地下水流模型的优势和局限性。

Investigation of hydrothermal heat and mass flux between the crust and the ocean between the Costa Rica Rift axis and Ocean Drilling Program Hole 504B is designed to aid in development of an integrated crust-hydrothermal-ocean circulation model. Heat flow will be measured along a 300 km long corridor as an integral component of a large multi-disciplinary, multi-institutional project called OSCAR (Oceanographic and Seismic Characterization of heat dissipation and alteration by hydrothermal fluids at an Axial Ridge). In combination with oceanographic plume mapping that will guide assessment of hydrothermal flux at the spreading axis, the new heat flow results will show how conductive flux varies as the plate ages, in particular where the transition from focused, high rate flow to diffuse, lower flux circulation occurs. This is a long-standing question in mid-ocean ridge studies. The influence of disrupted basement structure on local heatflow will be assessed.US scientists will work closely with UK and German colleagues that lead the main project. Addition of the heat flow acquisition enables addressing a main theme of the InterRidge Third Decade plan- heat and chemical exchange between the crust and the deep ocean. A female graduate student whose main training is in analytical modeling will gain experience in seagoing data acquisition, exposure to international scientists, and insight into the advantages and limitations of having surface-only data to constrain a subsurface flow model.