Composition and Origin of Fluids in Convergent Margins

通过对会聚边缘的地球化学、同位素和矿物学研究，可以推断增生杂岩中流体和成岩固体的性质和来源。本项目研究的巴巴多斯海脊、秘鲁边缘、南开海槽和新赫布里底斯岛弧在构造、热体制、沉积学和地球化学等方面存在差异。该项目的目标是在这四个不同的环境中限制流体-岩石的相互作用，并量化水和溶质通过吸积棱镜的流动。从这种环境中排出的流体在控制这些边缘的变形、热和地球化学演化方面发挥了关键作用。流体系统的综合将对规划未来在沉积楔形中的ODP型钻井非常重要。

The nature and origin of fluids and digenetic solids in accretionary complexes can be inferred from geochemical, isotopic and mineralogical studies of convergent margins. The Barbados Ridge, Peru margin, Nankai Trough and New Hebrides island arc to be studied in this project are different in structure, thermal regime, sedimentology and geochemistry. The objective of the project is to constrain the fluid-rock interactions in these four contrasting settings and to quantify the flow of water and solutes through the accretionary prism. Fluids being expelled from such settings play a key role in controlling the deformational, thermal, and geochemical evolution of these margins. A synthesis of the fluid systems will be important in planning future ODP drilling in accretionary wedges.