Mineralization Of Tectono-magmatic Upheaval-hydrothermal Alteration In Detachment Zone And The Study Of Typical Ore Deposit, Jiaodong Peninsula

Jiaodong gold clusters is the most important gold-producing area, and Jiaojiagold mine is the18th in the world. There are different points about the gold deposit’smetallogenic model, which is of great significance to deposit-study and deepperiphery prospecting. My Mineralization of Tectono-Magmatic Upheaval-Hydrothermal Alteration in Detachment Zone and The Study of Typical Ore Deposit,Jiaodong Peninsula has important value of study and application.With the idea on the tectonic-altered lithofacies, I have completed the1:250000tectonic-altered lithofacies regional geological mapping and7sections. I mainlystudied the regional metallogenic model and made detailed analysis onDayingezhuang gold deposits. I got the follow conclusions:1. Presented “Mineralization of Tectono-Magmatic Upheaval-Hydrothermal Alteration in Detachment Zone”.In the circumstances of counterclockwise shearing structures, the NEmantlebulge from the change of deep crust-mantle structure caused by New Huaxiatectonic stress field, is the main area of alteration-remelted magmatic development.Linglong dome shape granite body made by magmatic thermal uplift, have gneissicstructure which develops at shear-fault zone between metamorphic strata and thegranite body, the shear-fault zone is in the case of relax-tensional fracture in the lateperiod. Post-magmatic hydrothermal got many times and large-scalereplacement-alterations at detachment zone, especially at the granite body, anddeveloped the main gold industrial ore body.2. Revealde the process of Dayingezhuang gold deposit’stectonic-geochemical and tectonic-physicochemical interaction in tectonicalteration mineralization.1）The alteration zone is1.5km width at fault footwall. Summed up the faultalteration zoning characteristics as follows: beresite-cataclastic rock�'Sericitization potassic granitic altered rock�'strong potassic granitic altered rock�'weak potassicgranitic altered rock. The gold body develops in the beresite-cataclastic rock.2）The gold deposit alteration show characteristics of tectonic-physicochemicalinteraction: far away gold body alteration zone�'beresite zone, paleotectonic stressvalue presents the change tendency of from small to large, fluid inclusionshomogenization temperature and salinity shows the tendency of increase. Thehomogenization temperature range from230.56to308.0（℃）, and the salinity rangefrom7.83to9.35%（NaCl Wt%）. Anion is given priority to with sulfide in the ores,followed by fluoride, cation is given priority to with Na+、Ca2+. The gas phasecomposition is rich in CO2and H2O.3）The gold deposit alteration show characteristics of tectonic-geochemical: faraway gold body alteration zone�'beresite zone, CaO、Na2O、P2O5has been generallyin a state of emigration, SiO2、Fe2O3、K2O in a state of moving in. Elements of theoverall content change lightly from no-alteration to weak potassic stage, weight fromstrong potassic to beresite stage, suggested that hydrothermal activation is morestrong in bigger differential stress value area, and the tensile space produced by rockcrushing is easy to enrichment.