A half-century of environmental mineral formation on a pyrite-bearing waste dump in the mátra mountains, Hungary

Izabella M. Farkas, Tamás G. Weiszburg, Péter Pekker, E. Kuzmann

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Intensive Zn-Pb-Cu mining took place for about 40 years in the Gyöngyösoroszi-Mátraszentimre region, Mátra Mountains, Hungary. The last mine was closed in 1986 without remediation. In 2006, a large-scale project was launched for the complete remediation of the waste dumps (more than 20 sites) and for the proper sealing of the abandoned shafts and adits still releasing acid mine-drainage owing to the large amount of oxidizing pyrite in the walls. During the remediation, full profiles (up to 5-10 m) of old dumps were created, offering a unique opportunity for the systematic sampling of the products of mine-waste altera- tions. One of these accessible "natural laboratories", recording 40 years of environmental mineral formation, is the Bányabérc waste dump. Its volume reached 26, 000 m3, and its bulk pH was around 3.7. We carried out XRD, SEM-EDX and Mössbauer spectroscopic (room temperature, liquid nitrogen) analysis of the minerals present in the altering waste-dump material. Minerals found are pyrite, gypsum, jarosite, hydroniumjarosite, plumbojarosite, anglesite, quartz, the feldspars, goethite, hematite, picker- ingite, alunogen, epsomite, hexahydrite, a smectite-group phase, galena, sphalerite, and trace calcite. Rhomboclase and copiapite were identified by XRD in only one

Original languageEnglish
Pages (from-to)509-524
Number of pages16
JournalCanadian Mineralogist
Volume47
Issue number3
DOIs
Publication statusPublished - Jun 2009

Fingerprint

Bearings (structural)
Minerals
pyrite
remediation
Remediation
mountain
mineral
X-ray diffraction
jarosite
mine waste
acid mine drainage
mountain region
galena
sphalerite
sealing
goethite
Calcium Sulfate
smectite
shaft
hematite

Keywords

  • Bányabérc
  • Environmental mineralogy
  • Gyöngyösoroszi
  • Hungary
  • Jarosite-group minerals
  • Pyrite oxidation
  • Secondary sulfates

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

A half-century of environmental mineral formation on a pyrite-bearing waste dump in the mátra mountains, Hungary. / Farkas, Izabella M.; Weiszburg, Tamás G.; Pekker, Péter; Kuzmann, E.

In: Canadian Mineralogist, Vol. 47, No. 3, 06.2009, p. 509-524.

Research output: Contribution to journalArticle

Farkas, Izabella M. ; Weiszburg, Tamás G. ; Pekker, Péter ; Kuzmann, E. / A half-century of environmental mineral formation on a pyrite-bearing waste dump in the mátra mountains, Hungary. In: Canadian Mineralogist. 2009 ; Vol. 47, No. 3. pp. 509-524.
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