Department
of Earth Science |
Northeastern
Illinois University
Aqueous Geochemistry
Earth Science 406
Fall 2002
Department
of Earth Science |Northeastern
Illinois University
Conference Presentation Abstract
Journal Article: "Hydrogeochemistry of the Hypergenesis zone". S.L. Shvartsev. Geochemistry International. Vol 38. Suppl. 2, 2000, p. S260-S276.
Abstract written by Manuel de la Fuente
Many processes occur on the Earth's crust or hypergenesis zone with
the water as an active element. In many cases, water defines the
chemistry of these processes. The studied article gives a brief consideration
of new aspects of geochemical evolution of the water-rock system in the
hypergenesis zone, assuming that there is no influence of the human being.
Among the many aspects of this problems this paper specially emphasizes
on the equilibrium conditions between ground waters and rocks during the
weathering process. The opinion that due to a low solubility of most of
minerals their interaction with water leads to a rapid saturation of the
solution and to the stop of the dissolution of the mineral prevailed for
a long time. Using the new thermodinamics methods, computer and mathematical
programs and other modeling sources, the author states that ground waters
in the water-rock system are at the same time, in disequilibrium with respect
to the primary minerals and in equilibrium with respect to the compounds
formed out of the solution. This conclusion affects the opinion that
weathering and hydrothermal transformations of minerals take place in a
solid state, reinforcing the theory of transformation of primary minerals
through a transition liquid stage.
Last updated December 3, 2002