Assertion: sericitic alteration | /r/HasProperty | due
Facets:
value: essentially
type: DEGREE
Source sentences:
text: Sericitic alteration is essentially due to the destabilisation of feldspars by hydrolysis (H ion metasomatism) in the presence of OH, K and S, to form quartz, sericite (fine-grained white mica), pyrite, chlorite, and some chalcopyrite (sulphide content can be up to 20% by volume).