Kaiser, Knut; Miehe, Georg; Barthelmes, Alexandra; Ehrmann, Otto; Scharf, Andreas; Schult, Manuela; Schlütz, Frank; Adamczyk, Sonja; Frenzel, Burkhard (2008): (Table 3) AMS radiocarbon datings of soil profiles obtained in the Nagqu area [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.787163, In supplement to: Kaiser, K et al. (2008): Turf-bearing topsoils on the central Tibetan Plateau, China: Pedology, botany, geochronology. CATENA, 73(3), 300-311, https://doi.org/10.1016/j.catena.2007.12.001
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Coverage:
Median Latitude: 31.633020 * Median Longitude: 92.314945 * South-bound Latitude: 31.316220 * West-bound Longitude: 91.482640 * North-bound Latitude: 31.862970 * East-bound Longitude: 93.091690
Minimum DEPTH, sediment/rock: 0.040 m * Maximum DEPTH, sediment/rock: 0.290 m
Event(s):
Comment:
All macroremain samples from the Nagqu area yielded negative radiocarbon ages. The atmospheric nuclear weapon tests in the 1950s and early 1960s caused a steep increase of atmospheric 14C production to nearly double the natural value in 1963, leading to 'hyper-modern' 14C contents in naturally produced organic material, thus to highly negative radiocarbon ages. Thus the radiocarbon ages of the macroremains analysed can be clearly identified as modern (after 1950).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Depth, top/min | Depth top | m | Kaiser, Knut | ||
| 6 | Depth, bottom/max | Depth bot | m | Kaiser, Knut | ||
| 7 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 8 | Age, dated material | Dated material | Kaiser, Knut | |||
| 9 | Sample ID | Sample ID | Kaiser, Knut | |||
| 10 | Carbon-14 | 14C | % | Kaiser, Knut | in % modern, see dataset comment for further details | |
| 11 | Carbon-14 concentration, standard deviation | 14C conc std dev | ± | Kaiser, Knut | ||
| 12 | δ13C | δ13C | ‰ PDB | Kaiser, Knut | ||
| 13 | Age, dated | Age dated | ka BP | Kaiser, Knut | Age, 14C AMS | ka BP, see dataset comment for explanation of negative ages |
| 14 | Age, dated standard deviation | Age dated std dev | ± | Kaiser, Knut | ||
| 15 | Age | Age | a AD/CE | Kaiser, Knut | Age, 14C calibrated | |
| 16 | Age | Age | a AD/CE | Kaiser, Knut | Age, 14C calibrated | range min |
| 17 | Vegetation type | Vegetation type | Kaiser, Knut | present sedge species |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
114 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Depth top [m] | 6 Depth bot [m] | 7 Depth sed [m] | 8 Dated material | 9 Sample ID | 10 14C [%] (in % modern, see dataset comm...) | 11 14C conc std dev [±] | 12 δ13C [‰ PDB] | 13 Age dated [ka BP] (ka BP, see dataset comment fo...) | 14 Age dated std dev [±] | 15 Age [a AD/CE] (Age, 14C calibrated) | 16 Age [a AD/CE] (range min, Age, 14C calibrated) | 17 Vegetation type (present sedge species) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NAQ_3 | 31.7646 | 92.6299 | 4572 | 0.02 | 0.06 | 0.040 | Macroremains | 8060 | 107.71 | 0.67 | -25.3 | -0.597 | 0.050 | >1958 | Kobresia pygmaea | |
| NAQ_3 | 31.7646 | 92.6299 | 4572 | 0.16 | 0.18 | 0.170 | Humin fraction | 8066 | 79.11 | 0.49 | -26.4 | 1.882 | 0.050 | 21 | 242 | Kobresia pygmaea |
| NAQ_7 | 31.8630 | 93.0917 | 4484 | 0.02 | 0.06 | 0.040 | Macroremains | 8061 | 110.15 | 0.56 | -26.3 | -0.777 | 0.041 | >1958 | Kobresia pygmaea | |
| NAQ_7 | 31.8630 | 93.0917 | 4484 | 0.13 | 0.15 | 0.140 | Humin fraction | 8067 | 91.39 | 0.56 | -26.3 | 0.723 | 0.049 | 1214 | 1389 | Kobresia pygmaea |
| NAQ_22 | 31.3162 | 92.0556 | 4446 | 0.02 | 0.06 | 0.040 | Macroremains | 8064 | 124.56 | 0.67 | -25.4 | -1.764 | 0.043 | >1960 | Kobresia pygmaea | |
| NAQ_22 | 31.3162 | 92.0556 | 4446 | 0.09 | 0.12 | 0.105 | Macroremains | 8065 | 123.88 | 0.64 | -25.8 | -1.720 | 0.041 | >1960 | Kobresia pygmaea | |
| NAQ_22 | 31.3162 | 92.0556 | 4446 | 0.13 | 0.15 | 0.140 | Humin fraction | 8069 | 95.20 | 0.63 | -26.8 | 0.395 | 0.053 | 1431 | 1634 | Kobresia pygmaea |
| NAQ_18 | 31.5883 | 91.4826 | 4568 | 0.02 | 0.08 | 0.050 | Macroremains | 8062 | 125.54 | 0.64 | -28.0 | -1.827 | 0.041 | >1962 | Kobresia schoenoides | |
| NAQ_18 | 31.5883 | 91.4826 | 4568 | 0.13 | 0.17 | 0.150 | Macroremains | 8063 | 119.28 | 3.61 | -26.8 | -1.416 | 0.243 | >1958 | Kobresia schoenoides | |
| NAQ_18 | 31.5883 | 91.4826 | 4568 | 0.28 | 0.30 | 0.290 | Humin fraction | 8068 | 90.55 | 0.47 | -28.1 | 0.798 | 0.042 | 1165 | 1279 | Kobresia schoenoides |