The Study Of Epidotization And Hydrothermal Process Of Paleoproterozoic Volcanic Rocks In Lincheng Area,Hebei Province

“The study of epidotization and Hydrothermal Process of Paleoproterozoic Volcanic Rocks in Lincheng area,Hebei Province” is a special study on the project of "Qishan Lincheng Lake practice base construction",which is based on the Hebei geological university.The location of the study area in Lincheng County of Xingtai City,Hebei P-rovin ce,Located in the Taihang Mountain mountains in the middle east.The geotectonic position belongs to the two tectonic units of North China platform anteclise in eastern Shanxi platform.Through the study of the Paleoproterozoic Hutuo Systerm of Gantaohe Group Nansi Formation and Nansizhang Formation volcano rock epidotization can identify hydrothermal stages and activities in this area,abundant information,lay the foundation for further exploration of mineral resources.This paper is based on the analysis of previous data and research results,using the research methods of field geological survey and indoor rock testing combination,on the Nansi group and Nansizhang group volcano rock features,epidote and quartz vein characteristics,rock type,fluid inclusions,rock geochemistry etc to a systematic study was carried out to obtain the following understanding;(1)Through field geological investigation and petrographic analysis,theNansi group and Nansizhang group palm volcano rock influenced by hydrothermal activity and tectonic movement,no volcano rock appearance,were altered to chlorite schist,amphibole schist,epidote amphibolite facies,only local residual basaltic Ayama Iiwa and metamorphic andesite;(2)Through geochemical analysis,the South Temple group and South Temple palm metamorphic volcano rock overall group with high aluminum,potassium sodium,low TiO2,high Fe2O3/FeO value,speculated that the tectonic environment of island arc or active continental margin environment;(3)Through fluid inclusion analysis,it can be known that the hydrothermal environment of volcanic rock is a low temperature and low pressure environment,and the influence of the structure of the volcanic rock is the characteristics of the medium temperature and medium temperature;(4)The study and analysis of the system can be divided into three stages: hydrothermal solution,hydrothermal solution and the effect of the brittle deformation hydrothermal solution in Yanshan during the late 3 stages.