Tectonic Altered Rock Distribution And Deep Forecast Of Eastern Linglong Gold Ore-Field

The Linglong gold field has large altered rock type and quartz vein type gold deposit.The eastern part will be the major gold mining sector in the future. The sector is a complex with multi-stage, multi-direction and multi-zone mineralization,the deep mineralization is complex and exploration effect needs to be improved. This paper aims to carry out the metallogenic law and the deep mineralization prediction by the prediction method of tectonic altered rock facies. This paper has important significance and a guide deep prospecting Value.During Master’s study, I have participated Shandong gold Exploration project “three-dimensional study of tectonic altered rock and deep forecast of eastern Linglong gold ore-field”and “No. 50 and 48 veins comprehensive geological study and deep prognosis of Jiaojia gold ore-field”etc. Relying on these projects,we carried out Tectonic altered rock mapping forecast in the four mines, summarying the spatial distribution characteristics of altered rocks.Given priority to Dongfeng gold mine, I have studied the geochemical characteristics of each eclipsing rock band and estimated the depth of mineralization. My master’s thesis completed on time and this paper has made the following research results:1. Apply for the structural alteration phase method,the section can be divided unaltered granite belt, weak potassic alteration rock band, strong potassic rock band alteration, pyrite phyllic; Revising the 1: 10000 structural alteration facies maps of eastern Linglong Gold.The structural alteration facies distribution show,the altered rock′s scale gradually increased from north to south;2. On the basis of the 48 and 171 Vein altered rock zonation mapping, I have drawed the 30, 48 and 171 vein sectional view of prospecting line,the Ore control regularity show, the strong potassic alteration zone rock scale enhanced and the weak potassic alteration rock zone scale reduced from northwest to southeast;3. Establishing a spatial distribution model,the structural alteration lithofacies′Spatial distribution characteristics show that fracture altered rock zoning characteristics control GOLD type and fracture altered rocks zone scale control deposit type.4. Studying the geochemical characteristics and fluid inclusions characteristics of Dongfeng Mine, I have summarized the following features:(1) Structural alteration lithofacies′geochemical tests show that Fe2O3 、K2OandNa2O is closely related with the mineralization element transport; Au、Ag、W、Pb、Cu、As increase, Au、Ag have identical changes; pyrite phyllic phase is the element main precipitation stage in the entire altered process;(2)Analysising fluid inclusions′homogenization temperature and salinity,I found that forming fluids belong to the category of low salinity; At the same salinity and temperature show a positive correlation characteristics;5. Using the tectonic stress correction method, I estimate the depth of Dongfeng mine: 2554.89~3519.61km; And combined with the existing mineralization depth measurement data, I summed up the broken green tectonic rock zone mineralization depth range of 2.002 ~ 3.5km.