The Mesozoic Cenozoic Tectonic stress Fields of Shanmen Silver Ore Deposit,Siping,Jinlin Province and Its research Significance

In this paper,the Mesozoic Cenozoic tectonic stress fields of Shanmen silver mining area are divided into three tectonic stages, i e the Jurassic stage,Cretaceous stage and Tertiary stage The maximum principal axis of compressive stress in Jurassic trends NW SE,in Cretaceous it is NNE SSW,and that in Tertiary is EW The average value of differential stress in the Jurassic stage in 106 1 Mpa,and that in Cretaceous is 101 7 Mpa On the basis of tectonic stress field mathematical simulation integrated with geophysical and geo chemistry data,three minerogenetic provinces are regionalized