Rare element pegmatites GSOD20 Feb20 96x200 · 2020. 3. 16. · ŸRare-element pegmatites have...
Transcript of Rare element pegmatites GSOD20 Feb20 96x200 · 2020. 3. 16. · ŸRare-element pegmatites have...
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www.dmirs.wa.gov.au Geological Survey ofWestern AustraliaGovernment of Western AustraliaDepartment of Mines, Industry Regulation and Safety
RARE-ELEMENTPEGMATITES
FEBRUARY 2020
Rare-element pegmatites are a new addition to the GSWA Mineral Systems AtlasŸThis poster provides a mineral systems analysis for rare-element pegmatitesŸ
IntroductionRare-element pegmatites are important hosts for Li, Cs, and Ta mineralization in Western Australia, with examples including the Greenbushes, Pilgangoora, and Wodgina deposits.
What are rare-element pegmatites?
They are further divided into:Ÿ¡ Lithium–Cesium–Tantalum (LCT) pegmatites
The simplest classification scheme divides granitic pegmatites Ÿinto common pegmatites and rare-element pegmatites
¡ Niobium–Yttrium–Fluorine (NYF) pegmatites
Rare-element pegmatites have anomalous contents of Be, Li, ŸTa, Sn, and Cs
Pegmatite occurrences in the WAROX field observational Ÿdatabase show their wide distribution and correspondence to greenstone belts (Fig. 1)
Rare-element pegmatites represent