Description
Diapirism is the process of piercing or rupturing of domed or uplifted rocks by mobile core material, such as magma, salt or clay. In this context it refers only to clay diapirism, since the effects of magma are considered elsewhere in the FEP list and salt does not occur in the region of interest.
Category
Category of FEP
Sub-category
Sub-category of FEP
Ondraf Niras FEP Number
Ondraf Niras FEP Number
FEP Effects
Description of FEP Effects
Changing stability; changes in the stress field; pushing the waste upwards. Changes in host rock pore structure (fracturing, creation of preferential pathway). Dilution capacity of aquifer changes.
Plastic deformation may change shape of host rock layer and its physical properties such as density, preferred orientation of host rock minerals and porosity.
Reference(s)
References Relevant to FEP
ER-184_I2 RD&D Plan
NEA TN2 IFEP Reference(s)
Related IFEPs from the NEA TN2 List of Proposed IFEP Revisions [NEA/RWM/R(2013)8]