- 作者: CHII SHANG, WEN-SHENG LIN, AND CHEN-WUING LIU
- 中文摘要: A simplified simulation of copper precipitation during supergene enrichment processes was carried out to study the feedback behaviors of geochemical reaction and groundwater flow. Reevaluation of the pattern of formation was studied by means of the HYDROGEOCHEM code, wherein redox half reactions of covellite and chalcocite as reactants as well as precipitation reactions to form covellite and chalcocite were considered. The results indicate that the precipitation pattern is attributable to the redox-controlled process, wherein the electron potential is the key parameter for forming such a pattern. The quantities of precipitation are also related to the time span and initial aqueous copper ion concentration. This finding is in good agreement with field observations and gives a more physically-meaningful explanation of such phenomena compared to the non-selective equilibrium and/or kinetic controlled approaches reported in the literature.
- 英文摘要: --
- 中文關鍵字: precipitation, reactive transport, redox half reactions, supergene enrichment
- 英文關鍵字: --