工程地质学报2016，Vol.24Issue(5)：907-914,8.DOI:10.13544/j.cnki.jeg.2016.05.021
石英－绿帘石化的蚀变特征及工程特性研究
ANALYSIS ON PROPERTY OF QUARTZ -EPIDOTIZATION ALTERATION AND ITS ENGINEERING CHARACTERISTICS
摘要
Abstract
Quartz-epidotization alteration is an important geological problem in Dagangshan hydropower station . Taking into account the advantage of geological survey and laboratory experiment,this paper analyses its geological distribution,mineralogical and structural characteristics and physical and mechanical properties.The study reveals that ranite in SN /E∠1 7°~26°low-angle shearing belts often develops quartz-epidotization alteration formed by the dynamic metamorphism,which always grows scratches and order step.Alteration produces sericite,chlorite, epidote and calcite weak mineral content of about 1 8%.Chemical analysis shows little change in its composition. Physical and mechanical tests show that the physical and water properties and strength characteristics of altered rock have a certain degree of weakening,natural and saturated compressive strength loss rate of 8.3% and 5.9%.Quartz and epidote produced by alteration have an impact on the shear strength of the structure.In-situ direct shear tests show shear intensity decreases.Research has some innovative,can be a reference on engineering impact and process of quartz-epidotization alteration.关键词
石英-绿帘石化/蚀变特征/工程特性/蚀变矿物学特征/物理力学特性Key words
Quartz-epidotization/Alteration characteristics/Engineering characteristics/Mineralogical characteristics/Physical and mechanical properties分类
天文与地球科学引用本文复制引用
苗朝,沈军辉,石胜伟..石英－绿帘石化的蚀变特征及工程特性研究[J].工程地质学报,2016,24(5):907-914,8.基金项目
国家自然科学基金项目（41572308）资助． （）
