The secondary fissure, located on the upfaulted block of the major fissure, has the normal fault property with north dip and north downthrown, and merges into the major fissure with Y-shaped distribution at depth 300-500m in Quaternary system.
次缝位于主缝上盘,具有北倾北降的正断裂性质,并与主缝断裂呈丫字型构造,在深度300~500m处的第四系内与主缝汇合。
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