Tectonic Facies Characteristics Of Coarse-grained Granodic Granites In Luanjiahe Type In Jiaodong Northwestern

Luanjiahe granite is an important part of exquisite complex of Jiaodong agglomerate.Due to its close relationship with large-scale gold mineralization in Jiaodong,the granite in Jiaodong area has done a lot of research.It is believed that the granite According to the obvious difference between the tectonic stress field,the three main types can be divided into three main types: Linglong-Kunyushan type mime-like coarse grained biotite granite,Luanjiahe-Weideshan type coarse grains Granite,Guojialing type patchy granodiorite.The Luanjiahe-Weideshan granite is mainly divided into Luanjiahe rock mass,Guojiadian rock mass and BiGuo rock body in the northwest of Jiaodong.In this paper,the Luanjiahe granite in the northwest of Jiaodong is selected as the object of study,which is based on the three-dimensional study and deep prediction of the geochemical method of the deep prospecting geochemical method in the northwest of the Jiaodong gold mine.And the relationship between the tectonic differential stress and strain in different faulted structural alteration granites is analyzed.The relationship between the tectonic differential stress and strain is analyzed.The following conclusions are drawn:1,the catching body in the Luanjiahe rock mass is measured,and the average final shape axis ratio Rf range is 2.1 ~ 2.6.The logarithmic morphological method is used to obtain the The average original axis ratio Ri = 1.73,the average strain ratio is Rs = 1.35.There is no obvious deformation in the granite body of the granite,and the rock is in the process of displacement.2,Luanjiahe type granite granite has a typical granite structure.Feldspar account of the alteration of the phenomenon are not developed.Rock non-directional structure,even the late formation of quartz,nor as exquisite granite and Guojialing granite diorite rock as plastic elongated,but more stable and not strong directional external force products The This is the characteristic of the facies of the fractured zone.3,The maximum axial ratio of quartzite particles in the Guojiadian rock mass is1.3 ~ 1.4,there is no deformation structure,and there is no obvious strain law in the area.4,The difference of rock differential stress in different alteration zones is determined by quartz dislocation density method.The difference of stress is the largest in the strong potash granite belt,which is changed from ductile deformation to brittle deformation.In the process,the differential stress value becomes smaller,and the yellow iron sericite belt is less than the strong potash zone due to the stress release caused by the rock fracture.