xenothermal

xenothermal

[¦zēn·ə¦thər·məl]
(mineralogy)
Pertaining to a mineral deposit formed at high temperature but at shallow to moderate depth.
References in periodicals archive ?
Llallagua is a classic example of a "telescoped" deposit, in which high-temperature minerals (especially cassiterite and pyrrhotite) have been deposited in a low pressure, near-surface (xenothermal) environment.
The northern portion of the belt hosts primarily hypothermal and mesothermal deposits, whereas the southern and central sections are characterized by xenothermal mineralization, of which Cerro Rico is a prime example.
The early stages of deposition have been characterized as xenothermal, although part of the later stages appear to be the near-surface equivalent of mesothermal (i.e., kryptothermal), while the sulfosalts of the upper stage were probably deposited in the epithermal range.