A Petrologic and Geochemical Study of Fluid Flow, Diagenesisand Deformation in the Frontal Region of the Cascadia Accretionary Wedge

了解循环流体在控制收敛边缘沉积性质中的作用已成为海洋地球科学的一个高度优先的研究目标。在许多地区，可以直接取样排出的流体，并对循环深度、与周围沉积物的相互作用以及沉积物理参数的改变程度作出推断。海底沉积物取样和随后的分析可以检验环流系统的历史。该奖项将支持对俄勒冈州边缘由循环流体沉积的碳酸盐沉积物的岩石学和地球化学进行研究。样品将于1990年9月由潜水器回收。将分析样品的主要元素化学和同位素组成。

Understanding the role of circulating fluids in controlling sedimentary properties along convergent margins has become a high priority research objective in the marine geosciences. In a number of areas the discharging fluid can be sampled directly and inferences made about the depth of circulation, interaction with surrounding sediments, and degree of modification of sedimentary physical parameters. Sampling of sea-floor sediments and subsequent analysis can allow the history of circulation systems to be examined. This award will support an examination of the petrography and geochemistry of carbonate sediments that have been deposited by circulating fluids along the Oregon margin. Samples will be recovered by submersible in September of 1990. Samples will be analyzed for their major element chemistry and isotope composition.