The Study Of Linglong Gneissic Granite Tectonic Rocks Phase And Deep Metallogenic Prediction Of Linglong Gold Deposit

The Mesozoic granites,which are closely related to the formation of gold deposits,are widely exposed in the northwestern part of Jiaodong.At present,the geological workers who research on metallogenic granites mainly rest on the idea of unit-superunit.With the advance of prospecting for deep ore and the trend of structural geology in northwest Jiaodong,This paper is based on the view of granite tectonic rocks phase,we choose the Linglong Gneissic Granite as the research object,and study the microstructure geometry of the granite with the idea of granite tectonic rocks phase,and mainly study the foliation texture and S-C structure of and the structure of the mirror and the specimen specimen geometry of rock mass.Which provides geological basis for stress analysis of tectonic phase and has important application value and geological significance of gold exploration.Through a 5km2 regional geological survey,The foliation and tectonic phenomena of the rock mass in the study area are systematically observed and I have got a lot of measured data and pictures.Draw up the foliation distribution track;collect the standard directional sample at the good observation point of the outcrop,and carry on the microscopic structure observation of the room,I have emphatically analyzed the geometrical characteristics of gneissic granite,and choose the 48 and 50 vein as the object of study,Based on the analysis of rock geochemical tests,the geological characteristics and deep metallogenic regularities of the deposit are summarized,and the deep mineralization of the ore body is carried out.On the basis of these work,the target area of deep concealed orebody is put forward.Main conclusions obtained are as follows:1.The rock foliation distribution trajectory shows that in the middle of the rock,the foliation is roughly circular or oval distribution,further validation of this kind of rock magma by regional compressive shear stress formed "magmatic core complex" in the process of invasion uplift.2.The finite element strain analysis of the three-dimensional geometrical structure of the shear phase gneissic granite is carried out.The K value is 1.54 by using the Flynn diagram,and the magma is in the NW-SE extensional environment background cooling solidified diagenesis,the largest principal stress orientation is near the horizontal.3.The fluid inclusion homogenization temperature,salinity test results show that the ore-forming fluid has the characteristics of low temperature,low salinity,and temperature andsalinity are positively correlated;inclusion pressure calculation results show that stress in the alteration of a strong parts is smaller than that in weak parts.4.Establishing deep ore prediction index,determining the distance between the deep gold ore enrichment zone is about 200 m.A sketch map of two deep vein metallogenic prediction models is established.The prediction of depth of vein 50 ore bodies in the deep exploration in the area of approximately in 840 m ~ 1450 m,and predict the depth of vein 48 ore bodies in the deep exploration in the area of approximately in 1000 m ~ 1400 m.