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TheJinchuanultramaficintrusionislocatedintheLongshoushanUpliftonthesouthwesternmarginoftheAlxaBlock,tothenorthoftheNorthernQilianOrogenicBelt(Fig.1).Itisbroadlydyke-like,andwasintrudedintoaPaleoproterozoicsequenceofmigmatites,gneissesandmarbles(Baijiazhui