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→Nontectonic fracture families
==Nontectonic fracture families==
==Nontectonic fracture families==
A wide variety of nontectonic elements have been interpreted to cause fractures and fracture traps. The more common ones include salt solution, piercement by mobile cores, meteorite impact, compaction drape, shrinkage due to cooling or diagenesis, pore-fluid overpressuring, erosional uplift and unloading, and hydrothermal fracturing. Each of these can be used as nontectonic fracture trap families. Where necessary, subfamilies and varieties can be created for any of these families. The outline below shows the order and some definitions for these traps.
A wide variety of nontectonic elements have been interpreted to cause fractures and fracture traps. The more common ones include salt solution, piercement by mobile cores, meteorite impact, compaction drape, shrinkage due to cooling or diagenesis, pore-fluid overpressuring, erosional uplift and unloading, and hydrothermal fracturing. Each of these can be used as nontectonic fracture trap families. Where necessary, subfamilies and varieties can be created for any of these families. The outline below shows the order and some definitions for these traps.
{| class = wikitable
|-
! Regime || Superclass || Class || Superfamily || Family || Subfamily
|-
| rowspan = 12 | Fracture || rowspan = 12 | Extension fractures || colspan = 4 | Parallel
|-
| rowspan = 11 | Intersecting || rowspan = 11 | Nontectonic fracture trap; Fractures generated by nontectonic stresses, e.g., salt solution, piercement, shrinkage, and over pressuring. || colspan = 2 | Solution collapse
|-
| colspan = 2 | Piercement
|-
| colspan = 2 | Impact
|-
| colspan = 2 | Compaction drape
|-
| rowspan = 2 | Shrinkage || Chert diagenesis
|-
| Cooling joints
|-
| rowspan = 3 | Overpressuring || Source rock maturation
|-
| Geothermal pressuring
|-
| Clay dewatering
|-
| colspan = 2 | Unloading
|-
| colspan = 2 | Hydrothermal
|}
'''Superclass:''' Extension fractures
'''Superclass:''' Extension fractures