Search results
Results from the WOW.Com Content Network
Mineral alteration refers to the various natural processes that alter a mineral's chemical composition or crystallography. [1]Mineral alteration is essentially governed by the laws of thermodynamics related to energy conservation, relevant to environmental conditions, often in presence of catalysts, the most common and influential being water (H 2 O).
Silica alteration zone, found in the most intensely altered examples, resulting in complete silica replacement of the host rocks, and associated with chalcopyrite-pyrite stringer zones. Chlorite zone, found in nearly all examples, consisting of chlorite ± sericite ± silica. Often the host rock is entirely replaced by chlorite, which may ...
For example, S sounds can imply danger or make the audience feel as if they are being deceived. [37] Other sounds can likewise generate positive or negative responses. [38] Alliteration serves to "intensify any attitude being signified". [39]: 6–7 An example is in John F. Kennedy's Inaugural Address, in which he uses alliteration 21 times.
Metasomatism (from the Greek μετά metá "change" and σῶμα sôma "body") is the chemical alteration of a rock by hydrothermal and other fluids. [1] It is traditionally defined as metamorphism which involves a change in the chemical composition, excluding volatile components. [2]
Iron oxide copper gold (IOCG) deposits are considered to be metasomatic expressions of large crustal-scale alteration events driven by intrusive activity. The deposit type was first recognised by discovery and study of the supergiant Olympic Dam copper-gold-uranium deposit (Olympic Dam mine), and South American examples.
However, this term has filtered into the field of anthropology, archaeology and paleontology to describe the changes and alterations that take place on skeletal (biological) material. Specifically, diagenesis "is the cumulative physical, chemical, and biological environment; these processes will modify an organic object's original chemical and ...
Labiaplasty – alteration (removal, reduction, enhancement, or creation) of the labia; Circumcision – the partial or full removal of the foreskin, sometimes also the frenulum; Foreskin restoration – techniques for attempting the restoration of the foreskin; Emasculation – complete removal of the male genitalia (orchiectomy plus penectomy)
An example of a phonologically conditioned alternation is the English plural marker commonly spelled s or es. [1] This morpheme is pronounced /s/, /z/, or /ᵻz/, [note 1] depending on the nature of the preceding sound.