Clastic Dikes
Type Sedimentary (Clastic)
Essential mineral(s) {{{Essential mineral(s)}}}
Accessory mineral(s) {{{Accessory mineral(s)}}}

Clastic Dikes are a kind of dike that is sedimentary in origin, as opposed to igneous. Sometimes reffered to as 'sandstone dikes', these dikes are most commonly found within another sedimentary unit, as a form of soft sediment deformation. More uncommonly, clastic dikes can be basement hosted - that is, the sedimentary dike is found within an igneous or metamorphic mass, such as a batholith or a pluton.

Sedimentary Hosted Clastic DikesEdit

Clastic dikes hosted within sediment are generally believed to be formed in the following manner:

  1. An initial layer of sediment is deposited
  2. While still partially unlithified and somewhat saturated, more lower porosity sediment is deposited on top.
  3. If the pore water pressure in the underlying sediment exceeds the lithostatic pressure of the sediment above, the underlying sediment will fracture the upper and inject material into the unit above, forming the dike.

Seismogenic events (earthquakes) can often facilitate this process, as can other catastrophic events such as turbidites.

Basement Hosted Clastic DikesEdit

Much more rare and not well understood

Case StudiesEdit

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