jgg     2007 27 (6):  61-64    ISSN: 0412-1961  CN: 21-1139/TG ＯＮＰＯＳＩＴＩＯＮＩＮＧＷＡＹＦＯＲＡＲＲＡＹＭＩＣＲＯＴＲＥＭＯＲＯＢＳＥＲＶＡＴＩＯＮ ＬｉａｏＣｈｅｎｇｗａｎｇ １，２;ＤｅｎｇＴａｏ １，２;ＤｉｎｇＷｅｉ １，２;ＷａｎｇＨａｏ １，２;ＴａｎＹａｏｙｉｎ １，２;ＣｈｅｎＷｅｉｍｉｎ １，２ １）ＩｎｓｔｉｔｕｔｅｏｆＳｅｉｓｍｏｌｏｇｙ，ＣＥＡ，Ｗｕｈａｎ　４３００７１ ２）ＣｒｕｓｔａｌＭｏｖｅｍｅｎｔＬａｂｏｒａｌｏｒｙ，Ｗｕｈａｎ ４３００７１ Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null