jgg     2007 27 (6):  28-32    ISSN: 0412-1961  CN: 21-1139/TG ＯＣＥＡＮＴＩＤＥＬＯＡＤＩＮＧＣＯＲＲＥＣＴＩＯＮＯＮＬＯＮＧＰＥＲＩＯＤＥＡＲＴＨ ＴＩＤＡＬＧＲＡＶＩＴＹＯＢＳＥＲＶＡＴＩＯＮＡＴＷＵＨＡＮＳＴＡＴＩＯＮ ＺｈｏｕＪｉａｎｇｃｕｎ１，２;ａｎｄＳｕｎＨｅｐｉｎｇ１ １）ＫｅｙＬａｂｏｒａｔｏｒｙｏｆＤｙｎａｍｉｃａｌＧｅｏｄｅｓｙ，ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｄｅｓｙａｎｄＧｅｏｐｈｙｓｉｃｓ，ＣＡＳ，Ｗｕｈａｎ　４３００７７ ２）ＧｒａｄｕａｔｅＵｎｉｖｅｒｓｉｔｙｏｆＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ，Ｂｅｉｊｉｎｇ 　１０００４９ Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null