摘要
对河北邯郸涉县产出的绿帘石进行了成分特征、环带结构和红外光谱的分析,据此讨论了其成因。研究发现符山产出的绿帘石颗粒粗大,颜色主要为墨绿色,黄绿色,其颜色深浅受Fe的含量控制;晶体多为柱状,纵纹发育,以半透明-不透明居多,裂隙发育;折射率为1. 741～1. 774,密度为3. 38～3. 49 g/cm^3。镜下多为不规则粒状,多发育环带。化学成分以SiO_2,Al2O_3,CaO以及Fe_2O_3为主,环带的形成主要是由于Fe与Al元素分布不均匀所导致,其核部的XFe值小于边部;红外光谱特征与绿帘石的理论值相符,其中水的吸收峰明显。符山绿帘石为岩浆热液交代成因,其形成过程中物理化学条件变化较大,区域构造应力发育,这是造成其广泛发育环带和裂隙的原因。
The composition characteristics,zoning texture and infrared spectrum of epidote in Shexian County,Handan City,Hebei Province were analyzed,and the genesis were discussed.Epidote shows blackish-green,yellowish-green color,which is controlled by the content of Fe elements.The crystal is mostly columnar,and the longitudinal stripe is developed with translucent and opaque,and the fissure is developed.It is reflective index of 1.741-1.774,specific gravity of 3.38-3.49 g/cm^3.Under microscope,epidote is irregular grainy with zoning.Meanwhile,The main chemical composition of epidote are SiO2,Al2O3,CaO and Fe2O3.The formation of the chemical zoning is mainly due to the uneven distribution of Fe and Al elements,and the X Fe value of its core is less than that of the edge.The peaks of infrared spectrum are consistent with the theoretical values of epidote.The infrared spectra show the presence of water.The epidote is formed by magmatic hydrothermal metasomatism.During its formation,the physical and chemical conditions change greatly,and the regional tectonic stress is strong.This is the reason for the widespread development of the zoning texture and fissures.
作者
王一奇
张聚全
王礼胜
高新宇
孙天琦
赵改超
王琳萱
李亚琦
徐翠
WANG Yi-qi;ZHANG Ju-quan;WANG Li-sheng;GAO Xin-yu;SUN Tian-qi;ZHAO Gai-chao;WANG Lin-xuan;LI Ya-qi;XU Cui(College of Resource,Hebei GEO University,Shijiazhuang 050031,China;School of Gemology and Materials Technology,Hebei GEO University,Shijiazhuang 050031,China;Hebei Institute of Geology and Mineral Resources Survey,Langfang 065000,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第1期143-147,共5页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金青年基金(41602028)
河北省教育厅自然科学青年项目(QN2017025)
河北地质大学青年项目(QN201708)
河北地质大学博士科研启动基金(BQ201609)
关键词
绿帘石
符山
环带结构
矿物成因
epidote
fushan
zoning texture
mineral genesis
