Geofluids / 2017 / Article / Tab 3

Research Article

The Early Cambrian Mianyang-Changning Intracratonic Sag and Its Control on Petroleum Accumulation in the Sichuan Basin, China

Table 3

Differential diagenesis of Early Cambrian Longwangmiao Formation across the intracratonic sag.


LocationWestern margin of sagCenter of sagEastern margin
LithologyCrystalline dolomiteDolomitic grainstone, crystalline dolomiteDolomitic grainstone
Mudstone recrystallizationNoWeakWeak
Freshwater karstificationWeakModerateStrong
Compaction, pressure solutionModerateModerateModerate
Epigenic karstificationWeakModerate to strongModerate
Hydrothermal dolomiteModerateStrongModerate
First charging of hydrocarbon and bitumenNoModerateStrong
Second charging of hydrocarbonsNoModerateStrong

(For locations, see Figure 1.)

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