pyritization

pyritization

[‚pī‚rīd·ə′zā·shən]
(geology)
A common process of hydrothermal alteration involving introduction of or replacement by pyrite.
References in periodicals archive ?
3b) and gold mineralization mainly occurs with silicification and pyritization. Altered rock type is strongly associated with intense silicification, pyritization, chloritization and illitization and its protolith are commonly volcanic breccia and tuff (Fig.
During the early stage of the diagenetic period, recrystallization of quartz and extensive pyritization took place and the purple sandstone was discolored and changed into the light grey sandstone zone in the red-bed type copper deposits, Chuxiong basin.
Crystallographic and chemical variations during pyritization in the upper Barremian and lower Aptian dark claystones from the Lower Saxonian Basin (NW Germany): Sedimentology, 37, pp.
From microstructural observation, it can be inferred that the post-depositional and diagenetic history of the La Luna Formation included episodes of calcite cementation, pyritization of organic matter and illitization of smectite.
Pyritization of the coastal sediments in the Kelantan plains in the Malay peninsula during the Holocene.
Volcanic tuffs also show alterations and plant remains show pyritization. At the site of uranium mineralization no color or mineral change occurs[4].
These facies revealed the signs of diagenetic alteration caused by the micritization dissolution cementation pyritization recrystallization physical and chemical compaction and fracturing.
Huerta-Diaz MA, Morse JW (1992) Pyritization of trace metals in anoxic marine sediments.
The mineralizations are silicification, ferritization, pyritization, malachitization, and chalcopyritization.
Pyritization of a thick zone that has taken place beneath an erosion surface may represent a significant hiatus associated with the erosion event [33].
Roychoudhury AN, Kostka JE, Van Cappellen P (2003) Pyritization: a palaeoenvironmental and redox proxy reevaluated.