Microstructural and geochemical analysis on limit of time series of mineralization in Susong metamorphic phosphorous deposit, western Anhui Province

摘要

There are a series of medium and small metamorphic phosphorous deposits distributed from Zhangchun and Huangmei counties of Hubei Province through Susong and Feidong counties of Anhui Province to Donghai County of Jiangsu Province, which are named Haizhou-type phosphorous deposit. Based on the study of the microstructures, ultra-microstructures and geochemistry in Susong phosphorous belt located in the southeastern part of the Dabie Mountains, the authors have presented the principle of studying mineralization period by using the time series of the deformation, that is, by using the microstructural and ultra-microstructural methods to calculate the differential paleo-stress and strain rate in the tectonic deformation belt, using iso-concentration diagram to calculate volume factors in the phosphorous deformed belt, using the ratio of linear compression to rheological rate to manifest the time series limit of the deformation and then using it to represent the mineralization period of the phosphorous deposit.