Magmatic and Tectonic Segmentation of the Mid-Atlantic Ridge30 Degrees to 34 Degrees North, A U.S. - Soviet Cooperative Study

私家调查局建议继续一项美俄合作项目（始于1989年），研究海耶斯和亚特兰蒂斯转换之间MAR的地球化学、构造和构造分段。俄罗斯船只Boris Petrov将用于全面的地球物理和水深测量，而ALVIN将用于在较短的波长范围内对脊段进行采样。目的是评价在脊分割的所有尺度上观测到的地球化学和构造变化的成因过程（地幔源变化、熔融深度、晶体分馏、岩浆混合等）。

The P.I. proposes to continue a U.S.-Russian collaborative project (started in 1989) to study geochemical, tectonic, and structural segmentations along the MAR between Hayes and Atlantis Transforms. The Russian vessel Boris Petrov will be used for overall geophysical and bathymetric surveys and ALVIN will be used to sample ridge segments at shorter wavelength intrasegement scale. The goal is to evaluate the petrogenetic processes (mantle source variations, depth of melting, crystal fractionation, magma mixing etc.) that are responsible for the observed geochemical and tectonic variations at all scales of ridge segmentation.