The potash feldspar orebodies are discovered in a slightly-weathered zone of megaporphyritic medium-coarse-grain hornblende biotite adamellite. 矿体赋存于巨斑状中粗粒角闪黑云二长花岗岩弱风化带中。
Such low velocities are usually seen only near the surface in a zone called the weathered layer or the low-velocity layer. 这样低的速度通常只在地表附近称为风化层或低速层的地带中见到。
