To evaluate the effects of quartz precipitation on abundance and preservation organic matter pores in marine shale reservoirs, type authigenic source silica, as well corresponding relation Lower Cambrian Shuijingtuo Formation South China were investigated. Quartz occurs four different types: detrital quartz, replacement biosiliceous debris, euhedral filled interparticle pores, microquartz dispe...

On the example of estuary Mius River - mouth River, estuary, Taganrog Bay Azov Sea, a complex chemical and instrumental methods was applied, including those developed by authors. This made it possible to study physicochemical parameters, content total hydrogen sulphide, form occurrence sulfides, iron their behavior in bottom sediments early diagenesis. Bottom were formed at negative Eh values. ...

Abstract Diagenesis can have a major impact on sedimentary mineralogy. Primary magnetic mineral assemblages be modified significantly by dissolution or formation of new minerals during early late diagenesis. At International Ocean Discovery Program Site C0023, which was drilled in the protothrust zone Nankai Trough Expedition 370, offshore Shikoku Island, Japan, non‐steady state conditions prod...

Abstract Palaeozoic stromatoporoids, throughout their 100-million + year history (Middle Ordovician to Late Devonian and rare Carboniferous), are better preserved than originally aragonite molluscs, but less well-preserved low magnesium-calcite brachiopods, bryozoans, trilobites corals. However, the original mineralogy of stromatoporoids remains unresolved, details diagenesis patchy. This study...