Motoyoshi, Yoichi; Hokada, Tomokazu; Shiraishi, Kazuyuki (2007): Age determination on monazite from Forefinger Point granulites, East Antarctica (Table 2.6-1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.605212, Supplement to: Motoyoshi, Y et al. (2006): Electron micoprobe (EMP) dating on monazite from Forefinger Point granulites, East Antarctica: Implication for Pan-African overprint. In: Fütterer, D K, Damaske, D, Kleinschmidt, G, Miller, H & Tessensohn, F (eds.), Antarctica: contributions to global earth sciences, Springer, Berlin, Heidelberg, New York, 63-68, hdl:10013/epic.26796.d001
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Abstract:
Electron microprobe (EMP) dating on monazite in granulite- facies rocks from Forefinger Point, East Antarctica, yielded dominant ages of 500 Ma on matrix monazites.They are associated with secondary cordierite, biotite and sapphirine, formed during nearly isothermal decompression after the high P-T assemblages involving garnet, orthopyroxene and sillimanite. Older ages around 750-1000 Ma are detected in monazite cores and in monazite inclusions in garnet porphyroblast. Combining the available age data and the reaction textures, it becomes evident that the Forefinger Point granulites have been overprinted by a granulite-facies decompressional event of Pan-African age. Moreover, EMP monazite dating imply that the Forefinger Point granulites have experienced at least two stages of metamorphic evolution.
Coverage:
Latitude: -67.500000 * Longitude: 48.000000
Minimum ORDINAL NUMBER: 1 * Maximum ORDINAL NUMBER: 101
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | ORDINAL NUMBER | Ord No | Geocode | |||
| 2 | Sample code/label | Sample label | Motoyoshi, Yoichi | |||
| 3 | Uranium dioxide | UO2 | % | Motoyoshi, Yoichi | Electron microprobe (EMP) | |
| 4 | Thorium oxide | ThO2 | % | Motoyoshi, Yoichi | Electron microprobe (EMP) | |
| 5 | Thorium oxide | ThO2 | % | Motoyoshi, Yoichi | Electron microprobe (EMP) | Sum of measured ThO2 and ThO2 equivalent of the measured UO2 |
| 6 | Lead oxide | PbO | % | Motoyoshi, Yoichi | Electron microprobe (EMP) | |
| 7 | Age, dated | Age dated | ka | Motoyoshi, Yoichi | ||
| 8 | Age, error | Age e | ± | Motoyoshi, Yoichi |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
707 data points