Mikhalsky, Evgeny V; Belyatsky, Boris V; Roland, Norbert W (2009): Tab. 1: U-Pb analyses of zircons from rock samples in MT. Newton and Cumpston Massif, East Antarctica [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.754607, Supplement to: Mikhalsky, EV et al. (2009): New evidence for palaeoproterozoic tectono-magmatic activities in the southern Prince Charles Mountains, East Antarctica. Polarforschung, 78(3), 85-94, hdl:10013/epic.33326.d001
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Abstract:
We present new U-Pb zircon (SHRIMP) data on rocks from Mt Newton and Cumpston Massif in the southern Prince Charles Mountains. Our data demonstrate that Mt Newton was affected by a newly proposed Palaeoproterozoic "Newton" Orogeny at c. 2100-2200 Ma. Sedimentation, felsic volcanism (c. 2200 Ma), metamorphism and folding, followed by granite intrusion (c. 2100 Ma), suggest development of a trough or aulacogene in the area during the early Palaeoproterozoic. An orthogneiss from Cumpston Massif yielded an age of c. 3180 Ma for granitic protolith emplacement, which is in good agreement with many U-Pb zircon ages from similar rocks in the southern Mawson Escarpment. A syn- to late-tectonic muscovite-bearing pegmatite from Cumpston Massif yielded a c. 2500 Ma date of emplacement, which indicates early Palaeoproterozoic activity in this block, probably in response to a tectono-magmatic episode in the Lambert Terrane bordering the Ruker Terrane in the northeast. The correlation of tectono-magmatic events in both the Ruker and Lambert terranes of the southern Prince Charles Mountains provides evidence for their common evolution during the Proterozoic.
Coverage:
Median Latitude: -73.775000 * Median Longitude: 66.095000 * South-bound Latitude: -73.950000 * West-bound Longitude: 65.300000 * North-bound Latitude: -73.550000 * East-bound Longitude: 67.000000
Minimum ORDINAL NUMBER: 1.1 * Maximum ORDINAL NUMBER: 12.1
Event(s):
48140-1 * Latitude: -73.650000 * Longitude: 66.680000 * Location: Cumpston Massif, Prince Charles Mountains, East Antarctica * Campaign: PCMEGA (Prince Charles Mountains Expeditin of Germany and Australia) * Basis: Sampling on land * Method/Device: Geological sample (GEOS)
48145-2 * Latitude: -73.950000 * Longitude: 65.300000 * Location: Mt. Newton, Prince Charles Mountains, East Antarctica * Campaign: PCMEGA (Prince Charles Mountains Expeditin of Germany and Australia) * Basis: Sampling on land * Method/Device: Geological sample (GEOS)
48148-6 * Latitude: -73.950000 * Longitude: 65.400000 * Location: Mt. Newton, Prince Charles Mountains, East Antarctica * Campaign: PCMEGA (Prince Charles Mountains Expeditin of Germany and Australia) * Basis: Sampling on land * Method/Device: Geological sample (GEOS)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | ORDINAL NUMBER | Ord No | Geocode | |||
| 3 | Material | Material | Mikhalsky, Evgeny V | |||
| 4 | Lead-206 | 206Pb | mg/kg | Mikhalsky, Evgeny V | common portion | |
| 5 | Uranium | U | mg/kg | Mikhalsky, Evgeny V | ||
| 6 | Thorium | Th | mg/kg | Mikhalsky, Evgeny V | ||
| 7 | Thorium-232/Uranium-238 ratio | 232Th/238U | Mikhalsky, Evgeny V | |||
| 8 | Lead-206 | 206Pb | mg/kg | Mikhalsky, Evgeny V | radiogenic portion | |
| 9 | Age, dated | Age dated | ka | Mikhalsky, Evgeny V | Age, 238U/206Pb Uranium-Lead | |
| 10 | Discordance | D | % | Mikhalsky, Evgeny V | D=100*{[age(207/206)]/[age(206/238)]-1} | |
| 11 | Lead-207/Uranium-235 ratio | 207Pb/235U | Mikhalsky, Evgeny V | |||
| 12 | Lead-207/Uranium-235, error | 207Pb/235U e | ± | Mikhalsky, Evgeny V | 1 sigma | |
| 13 | Lead-206/Uranium-238 ratio | 206Pb/238U | Mikhalsky, Evgeny V | |||
| 14 | Lead-206/Uranium-238, error | 206Pb/238U e | ± | Mikhalsky, Evgeny V | 1 sigma | |
| 15 | Error correction | E cor | Mikhalsky, Evgeny V |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
451 data points