白云石化作用及白云岩问题研究述评

近年来,关于白云石化作用及白云岩问题,取得了更深层次的发展。从白云石化作用入手,介绍根据古代白云岩的成因所建立的五个主要成因模式:蒸发作用模式、渗流-回流模式、混合白云石化模式、埋藏白云石化模式及海水白云石化模式,并介绍了国内外最新研究进展和成果。认为利用染色薄片鉴定、阴极发光显微镜观察、微量元素分析、碳氧稳定同位素测定及包裹体测温等综合手段进一步研究,最终将解决这些问题。

Current Topics about Dolomitization and the Problem of Dolostones

Nowadays,the progress of research about dolomitization and the issue of dolostone has been acquired.The paper introduces some of hot-topics about dolomitization and the problem of dolomitite,including five genetic classification of dolomitization: 1.supratidal sabkha dolomitization with an origin of penecontemporaneous;2..seepage-reflux dolomitization during the penecontemporaneous or early diagenetic stages;3.mixing-water dolomitization during the penecontemporaneous or early diagenetic stages;4.dolomites resulted from the burial dolomitization during the late diagenetic stages;5.deep-sea water dolomitization.This article also point out that there are still many problems about dolomitite which need to be studied further.Some of preblems will be accounted by means of stained thin section microscopic identification,catholuminescence microscopic observation,trace elent analysis,carbon and oxgen isotope geochemistry,and fluid inclusion analysis.