Geochemistry of supergene manganese oxide deposits, Groote Eylandt, Australia

B. Pracejus, B. R. Bolton

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Some 20 different supergene Mn oxide ores and associated secondary rocks from the Groote Eylandt manganese deposit were analyzed for their major, minor, and trace element content. It is possible to correlate groups of trace elements to individual minerals using a quantitative normalization technique that determines the mineralogical composition of the samples. Members of these groups tend to be elements with specific ionic radii, contained in the following host phases: pyrolusite (~0.4 Å and ≥1 Å), cryptomelane and todorokite (~0.7 Å), romanechite (no signficant correlation detected), kaolinite (~0.6, 0.8 and 1.0 Å), and goethite (~0.4 Å). Generally, distinctive supergene horizons, enriched in certain elements (eg Zn, Sr) and minerals, develop within the stratigraphic section. -from Authors

Original languageEnglish
Pages (from-to)1310-1335
Number of pages26
JournalEconomic Geology
Volume87
Issue number5
DOIs
Publication statusPublished - 1992

Fingerprint

Geochemistry
manganese oxides
manganese oxide
Trace Elements
geochemistry
Minerals
Manganese deposits
deposits
minerals
trace element
todorokite
manganese deposit
Kaolin
trace elements
mineral
goethite
Oxides
Ores
kaolinite
Rocks

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Geochemistry of supergene manganese oxide deposits, Groote Eylandt, Australia. / Pracejus, B.; Bolton, B. R.

In: Economic Geology, Vol. 87, No. 5, 1992, p. 1310-1335.

Research output: Contribution to journalArticle

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