Natural fractures are widespread in shales in sedimentary basins and can significantly
increase the bulk permeability and enhance fluid flow, which are thereby considered to be a …

Authigenic calcite abundantly forms during various diagenesis stages of shales. It
meticulously records information on diagenetic fluid (organic/inorganic) migration and fluid …

Outcrop studies are essential for understanding subsurface fractures, because some key
attributes such as length and height distribution cannot be measured using wellbores …

Recent advances in fracture-timing techniques have led to new insights about sequences
and mechanisms of fracture formation in mudrocks. Methods to constrain fracture timing in …

The bedding-parallel fibrous calcite veins in black shales are common in sedimentary
basins and retain significant information about shale diagenesis and organic matter …

The mechanisms leading to the formation of bedding-parallel calcite beef veins have been
widely debated, with discussions centered on timing or burial depth of vein generation …

Natural fractures within tight reservoirs form preferred pathways for hydrocarbon charge and
provide space for hydrocarbon preservation. However, the mechanism that controls the …

This study examines sealed fractures in core samples from the Paleocene organic-rich
lacustrine shales of the Gaoyou Depression, Subei Basin, China, using a multi-pronged …

To date, few isotope age constraints on primary oil migration have been reported. Here we
present U-Pb dating and characterization of two fracture-filling, oil inclusion-bearing calcite …

Between the end-Triassic mass extinction and the Toarcian Oceanic Anoxic Event, the Early
Jurassic witnessed important changes in carbon burial, palaeogeography and …