磁绿泥石成分、结构及其形成环境研究进展  

Chemical Constituent,Structure and Formation Environment of Berthierine

作　　者：李晓光[1] 刘钦甫[1] 程宏飞[1] 康艳霞[1] 孙波[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《矿物岩石地球化学通报》2014年第1期116-123,共8页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(41072119);中国博士后科学基金资助项目(2011M500034)

摘　　要：磁绿泥石化学成分类似于绿泥石,但属于蛇纹石结构。研究中常将其误认为是高岭石或鲕绿泥石,国内相关研究极为有限。作者综述了各地发现的磁绿泥石及其形成环境特点,将其形成环境分为两类:①海相环境,常在海相鲕粒铁质岩中以鲕粒形式产出,海相磁绿泥石多指示温暖、富铁且为还原环境的海域;②非海相环境,在北极荒漠土、煤炭沼泽、红土带、淡-半咸水的河漫滩和河口湾、火山成因块状硫化物矿床、三角洲、燧石黏土、花岗岩和变质岩中产出,多由海绿石、绿泥石、高岭石、钛云母、或红土转化形成。对磁绿泥石进行矿物学以及成因环境研究,有助于黏土矿物学研究的完善,对磁绿泥石产区的古环境分析也将大有裨益。Berthierine is a kind of clay mineral that similar to chlorite, having the serpentine-type structure. It was often mistaken for kaolinite or chamosite in former studies. This paper discussed the characteristics of berthierine formation in different environments around the world. The formation environment of berthierine can be divided into two categories：①marine environment, in which berthierine often has a relationship with marine oolitic ironstones. It can be authigenic as spherical particles in tropical waters. Berthierine often indicates a reducing marine environment of warm and Fe-rich. ②non-marine environment including arctic desert soil, coal swamp, laterite, fresh to brackish floodplain and estuarine, massive sulfide deposit, delta, flint clay, exhalative-sedimentary ores and granitic pegmatite. These kinds of berthierine can be transformed from glauconite, chlorite, kaolinite, odinite or laterite. It is of great significance for the study of clay mineralogy and paleoenvironmental analysis of the research area to study the mineralogy characteristics and forming environment of berthierine.

关 键 词：磁绿泥石 0.7nm绿泥石 化学组成 结构 形成环境 

分 类 号：P571[天文地球—矿物学] P575[天文地球—地质学]