Fig. 5
From: Hydrothermal-sedimentary dolomite — a case from the Middle Permian in eastern Junggar Basin, China
Typical photographs of the buddingtonite-albite dolostone (BAD) of the Middle Permian Lucaogou Formation in Well J174 at 3126.5 m, Jimusar Sag, Junggar Basin. a Photograph of the BAD; b Thin-section photomicrograph of the BAD consisting of dolomite microlites and albites, in which authigene lath-shaped albites present, under cross-polarized light; c Thin-section photomicrograph of the dolomitic-albite buddingtonite rock, in which dolomites and albites filled the holes between black spherulites under cross-polarized light; d Thin-section photomicrograph of the lower part of the dolomitic-albite buddingtonite rock, in which black spherulites are bigger, under cross-polarized light; e Back-scattering image showing the dolomite spherulites being cemented by albites; f Back-scattering image of black spherulites consisting of buddingtonites and holes, between which are dolomites and albites; g Back-scattering image of authigene lath-shaped albites; h Scanning electron microscope image of the authigenic albites. The red points in e represent the electronic probe analysis locations. Ab = Albite; Bdt = Buddingtonite; Dol = Dolomite