Annotated record of the detailed examination of Mn deposits observed Mid-Atlantic Ridge at 45°N

Diorites, associated with basalts, basalt breccias, and serpentinized peridotites, occur in situ on the faulted scarps of two seamounts from the western High Fractured Plateau of the Mid-Atlantic Ridge at 45°N.

闪长岩（Diorites）与玄武岩、玄武角砾岩及蛇纹石化橄榄岩伴生，原位赋存于北纬45°处大西洋中脊西部高断裂高原两座海山的断裂陡坡之上。