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一、引言荥经—马边—盐津断裂带位于凉山断块活动构造区的东边界,四川盆地西缘斜坡地带(图1,2)；属于向南南东运动的川滇菱形断块与四川盆地的过渡区。断裂带北起天全,
I. INTRODUCTION The Yingjing-Mabian-Yanjin fault zone is located on the eastern boundary of the active structural zone of the Liangshan fault block and on the western margin of the Sichuan Basin (Figures 1 and 2). The Sichuan-Yunnan rhombic fault blocks that belong to the south- Sichuan Basin transition zone. Fault zone sky from heaven,