Cassiterite; potential for direct dating of mineral deposits and a precise age for the Bushveld Complex granites

U-Pb and Pb isotopic measurements of cassiterite from the ∼200 Ma tin deposits of Belitung, Indonesia, and ∼2100 Ma Zaaiplaats deposit in South Africa demonstrate that cassiterite can be used to directly date mineral deposits, rather than associated minerals such as zircon and rutile. A precise U-Pb...

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Bibliographic Details
Published in:Geology (Boulder) 1992-04, Vol.20 (4), p.355-358
Main Authors: Gulson, Brian L, Jones, Melvyn T
Format: Article
Language:English
Subjects:
absolute age
Africa
Asia
Billiton
Bushveld Complex
Carbon dating
cassiterite
dates
Economic geology
Far East
geochronology
Geology
granites
igneous and metamorphic rocks
igneous rocks
Indonesia
Jurassic
Mesozoic
metal ores
mineral deposits, genesis
Minerals
oxides
Pb/Pb
Petrology
plutonic rocks
Precambrian
Proterozoic
South Africa
Southern Africa
tin ores
Transvaal region
Transvaal South Africa
U/Pb
upper Precambrian
Zaaiplaats
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Summary:U-Pb and Pb isotopic measurements of cassiterite from the ∼200 Ma tin deposits of Belitung, Indonesia, and ∼2100 Ma Zaaiplaats deposit in South Africa demonstrate that cassiterite can be used to directly date mineral deposits, rather than associated minerals such as zircon and rutile. A precise U-Pb age of 2099 ±3 Ma has been determined for cassiterites hosted in granites from the Bushveld Complex. On conventional 207Pb/204Pb-206Pb/204Pb plots, the data for the Indonesian deposits give an age apparently older than that obtained from U-Pb plots, perhaps indicative of inheritance of Pb from an older source.
ISSN:0091-7613
1943-2682
DOI:10.1130/0091-7613(1992)020<0355:CPFDDO>2.3.CO;2