论文部分内容阅读
研究样品由“向阳红16号”于1992年6～7月间取自冲绳海槽中部。对表层沉积物中>63μm粒级的石榴石和磁铁矿进行显微镜、扫描电镜能谱分析以及人工神经网络(B-P网络)的应用。研究表明,陆架边缘和槽坡的石榴石、磁铁矿主要来源于东海大陆架;槽底的石榴石部分来源于槽坡,部分属于海底火山或海底热液成因;槽底中北部的磁铁矿主要来源于火山活动,槽底南部的磁铁矿则可能主要来自于岛坡。
The study sample was taken from the middle of the Okinawa Trough from June 16 to July 1992 by “Xiangyang Hong 16”. Microscopy, scanning electron microscopy (SEM) analysis and artificial neural network (B-P) applications of garnet and magnetite> 63 μm in surface sediments were performed. The results show that the garnet and magnetite from the edge of the shelf and the slope are mainly derived from the continental shelf of the East China Sea. The garnet at the bottom of the trench is partly derived from the fluvial slope, partly due to the hydrothermal origin of the seabed volcano or the seafloor. The magnetite The main source of volcanic activity, south of the bottom of the magnetite may be mainly from the island slope.