Fig. 4
From: Hydrothermal-sedimentary dolomite — a case from the Middle Permian in eastern Junggar Basin, China
Typical photographs of the silicic dolostone (SD) of the Middle Permian Lucaogou Formation in Well J37 at 2863.6 m, Jimusar Sag, Junggar Basin. a Photograph of the SD; b Thin-section photomicrograph showing the brown dolomite spherulites (Dol), between which are chalcedony (Q), in the SD under cross-polarized light; c Thin-section photomicrograph of the SD under cross-polarized light; d Back-scattering image of the SD; e Back-scattering image of the SD; f Back-scattering image showing the dolomite spherulites in which zonal structure develops due to varying iron content. The red points represent the electronic probe analysis locations. Dol = Dolomite; Q = Quartz