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Parent Paper: A cryptic Mesoarchaean terrane in the basement to the Central African Copperbelt

Appearing in Journal of the Geological Society, Vol. 160, Part 1, January 2003, pp. 11-15

SHRIMP data are provided as two comma-delimited files. To view a file, click on the link. To download a file, right-click and select 'Save target as...'.
  • Table 1: Summary of SHRIMP U-Th-Pb zircon results for sample MVQ1
  • Table 2: Summary of SHRIMP U-Th-Pb zircon results for sample S11
Analytical techniques. U-Pb analyses were performed on the SHRIMP I and II ion microprobes at the Australian National University, Canberra. The separation of zircons was carried out at the Hugh Allsopp Laboratory, Johannesburg, using conventional techniques. The SHRIMP analytical procedure used in this study is similar to that described by Claoué-Long et al. (1995). Age calculations and plotting were done using Isoplot/Ex (Ludwig 2000) and all ages are quoted with errors at 1 sigma level. Zircons from sample MVQ1 were randomly selected for analysis; in sample S11, more than 80% of all available zircons were analysed. In the following age interpretations only isotopic ratios that are 10% or less discordant were considered as reliable age indicators.

Claoué-Long, J. C., Compston, W., Roberts, J. & Fanning, C. M. 1995. Two carboniferous ages: a comparison of SHRIMP zircon dating with conventional zircon ages and 40Ar/39Ar analysis. In: Geochronology Time Scales and Global Stratigraphic Correlation. SEPM Special Publications, 54, 1-21.

Ludwig, K. R. 2000. Users Manual for Isoplot/Ex version 2.3, a geochronological toolkit for Microsof Excel. Berkeley Geochronology Center, Special Publications No. 1a.