本文利用扫描电镜对冲绳海槽沉积物中火山型石英颗粒表面的微结构进行了研宄。发现此类石英颗粒具有明显的火山作用痕迹;如有结晶良好的六方双锥状高温β-石英晶体,有被高温熔蚀成卵形的石英颗粒,有的石英颗粒表面粘附着火山玻璃,有的在火山玻璃气泡内壁存在大小不等的熔蚀坑。上述各种火山型石英的出现,再次证明了冲绳海槽存在着火山沉积作用。 In this paper, the microstructure of the surface of volcanic quartz particles in the sediments of the Okinawa Trough was studied by scanning electron microscopy. Found that such quartz particles have obvious traces of volcanic action; if well-crystallized hexagonal biconical high-temperature β-quartz crystal, there are high-temperature erosion into oval quartz particles, and some quartz particles adhere to the surface of volcanic glass, Some exist in the volcanic glass bubble wall corrosion pits of varying sizes. The emergence of various volcanic quartz above again proved that there is volcanic sedimentation in the Okinawa Trough.