K Van Der Borg
Biographic Data
| ID | 5598637 |
|---|---|
| NAME | K Van Der Borg |
| GIVEN NAMES | K |
| FAMILY NAME | Van Der Borg |
| SIGNATURE | VAN DER BORG K |
| VERIFIED | No |
| TOTAL WORKS | 11 |
| TOTAL CITATIONS | 12 |
| WORKS AS AUTHOR | 11 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1983 |
| LATEST PUBLICATION YEAR | 2007 |
| H-INDEX | 2 |
Solar-forced 2600 BP and Little Ice Age highstands of the Caspian Sea
A Novel Approach for Developing High-Resolution Sub-Fossil Peat Chronologies with 14 C Dating
Sub-fossil sections from a Florida wetland were accelerator mass spectrometry (AMS) dated and the sedimentological conditions were determined. 14 C data were calibrated using a combined wiggle-match and 14 C bomb-pulse approach. Repeatable results were obtained providing accurate peat chronologies for the last 130 calendar yr. Assessment of the different errors involved led to age models with 3–5 yr precision. This allows direct calibration of pa…
On the Erosive Trail of A 14Th and 15Th Century Hurricane in Connecticut (Usa) Salt Marshes
This paper examines if an erosive hiatus found in the peat stratigraphy and marsh-accumulation record from northwest Hammock River Marsh (HRM), Connecticut (CT) can be attributed to a 14th or a 15th century hurricane, each documented by a radiocarbon-dated overwash fan in Succotash Marsh (SM) (Rhode Island) about 90 km to the east. Given that (i) the best estimate age range for the 15th century overwash deposit in SM (1400–1440 cal AD, 2 σ) overl…
Near-Zero Δ 14 C Values at 32 kyr cal BP Observed in the High-Resolution 14 C Record from U-Th Dated Sediment of Lake Lisan
A high-resolution atmospheric radiocarbon record has been obtained for the interval of 17–36 kyr from U/Th-dated aragonite sediment of Lake Lisan. Reservoir age corrections were applied with reservoir ages of 200, 1250, and 2000 yr, which correlate with the different water levels of the lake. The present 14 C record for Lake Lisan shows near resemblance with that of Lake Suigetsu: both converge to the value of Δ 14 C ∼0‰ at 32 kyr cal BP. Both al…
The Late Quaternary Sedimentary Record of Reykjanes Ridge, North Atlantic
Variability in surface and deep ocean circulation in the North Atlantic is inferred from grain-size characteristics and the composition of terrigenous sediments from a deep-sea core taken on Reykjanes Ridge, south of Iceland. End-member modeling of grain size data shows that deep-ocean circulation in this area decreased significantly during periods of maximum iceberg discharge. The episodes of reduced circulation correlate with the cold and abrup…
C Wiggle-Match Dating in High-Resolution Sea-Level Research
Comparison of two sets of marsh-accumulation records from each of three Connecticut (USA) salt marshes, one based on individually calibrated dates and the other on wiggle-match dating of the same series of dates, shows that wiggle-match dating results in more precise and objective reconstructions of longer-term (10 2 –10 3 yr) changes in accumulation rate. On (sub-)century time scales, wiggle-match dating can reveal steps in the calibrated marsh-…
In-Situ Radiocarbon Production by Neutrons and Muons in an Antarctic Blue Ice Field at Scharffenbergbotnen
In the radiocarbon accelerator mass spectrometry ( 14 C AMS) analysis of gases obtained in a dry extraction from a 52–m Antarctic ice core, we observed 14 CO 2 and 14 CO concentrations decreasing with depth. The concentrations are explained in terms of in-situ production by neutrons and captured muons in ablating ice. The ratio of the 14 CO2 concentration to that of 14 CO has been found to be constant at 1.9 ± 0.3. The ablation rates obtained of …
Abstracts of the 7th International AMS Conference
The AMS program at the S. Paulo 9MV Tandem accelerator has been initiated with major emphasis on projects based on the determination of 10Be, 26Al and 36C1 concentrations
A Method for Quantifying Deep-Sea Carbonate Dissolution Using 14 C Dating
We quantified the rate of carbonate dissolution with increasing water depth by taking the difference in the carbonate mass accumulation rate of deep (3393–4375 m) core top sediments from the shallowest one (3208 m), which we assumed was unaffected by dissolution. This method depends on high quality 14 C dates that we calibrated to calendar years for calculating sedimentation rates. Our results show low (ranging from 0 to 0.3 g cm −2 ka −1 ) and h…
Aridity in Equatorial Africa During the Last 225,000 Years
Maps of accumulation rates of freshwater diatoms and opal phytoliths in the surface sediments of the Zaire fan show that both types of microfossils were supplied to the ocean floor by the Zaire River, and that opal phytoliths also have a southern source, probably the region of the Namibian desert. The PhFD ratio, of opal phytoliths to freshwater diatoms, can be regarded as an aridity index for equatorial Africa, and probably for large parts of th…
Radiocarbon Dating with the Utrecht Tandem Accelerator
In 1979 when accelerator mass spectrometry was started in the Netherlands, Gove (1978) and Litherland (1980) demonstrated that a tandem accelerator is eminently suited for this work. Isotope ratios below 10 −15 could be determined and applications were stimulated on numerous fields of research. 14 C dating in particular would become an important application because smaller samples could be employed and more complex dating problems could be attack…
Near-Zero Δ 14 C Values at 32 kyr cal BP Observed in the High-Resolution 14 C Record from U-Th Dated Sediment of Lake Lisan
A high-resolution atmospheric radiocarbon record has been obtained for the interval of 17–36 kyr from U/Th-dated aragonite sediment of Lake Lisan. Reservoir age corrections were applied with reservoir ages of 200, 1250, and 2000 yr, which correlate with the different water levels of the lake. The present 14 C record for Lake Lisan shows near resemblance with that of Lake Suigetsu: both converge to the value of Δ 14 C ∼0‰ at 32 kyr cal BP. Both al…
C Wiggle-Match Dating in High-Resolution Sea-Level Research
Comparison of two sets of marsh-accumulation records from each of three Connecticut (USA) salt marshes, one based on individually calibrated dates and the other on wiggle-match dating of the same series of dates, shows that wiggle-match dating results in more precise and objective reconstructions of longer-term (10 2 –10 3 yr) changes in accumulation rate. On (sub-)century time scales, wiggle-match dating can reveal steps in the calibrated marsh-…
A Novel Approach for Developing High-Resolution Sub-Fossil Peat Chronologies with 14 C Dating
Sub-fossil sections from a Florida wetland were accelerator mass spectrometry (AMS) dated and the sedimentological conditions were determined. 14 C data were calibrated using a combined wiggle-match and 14 C bomb-pulse approach. Repeatable results were obtained providing accurate peat chronologies for the last 130 calendar yr. Assessment of the different errors involved led to age models with 3–5 yr precision. This allows direct calibration of pa…
Abstracts of the 7th International AMS Conference
The AMS program at the S. Paulo 9MV Tandem accelerator has been initiated with major emphasis on projects based on the determination of 10Be, 26Al and 36C1 concentrations
Radiocarbon Dating with the Utrecht Tandem Accelerator
In 1979 when accelerator mass spectrometry was started in the Netherlands, Gove (1978) and Litherland (1980) demonstrated that a tandem accelerator is eminently suited for this work. Isotope ratios below 10 −15 could be determined and applications were stimulated on numerous fields of research. 14 C dating in particular would become an important application because smaller samples could be employed and more complex dating problems could be attack…
Aridity in Equatorial Africa During the Last 225,000 Years
Maps of accumulation rates of freshwater diatoms and opal phytoliths in the surface sediments of the Zaire fan show that both types of microfossils were supplied to the ocean floor by the Zaire River, and that opal phytoliths also have a southern source, probably the region of the Namibian desert. The PhFD ratio, of opal phytoliths to freshwater diatoms, can be regarded as an aridity index for equatorial Africa, and probably for large parts of th…
A Method for Quantifying Deep-Sea Carbonate Dissolution Using 14 C Dating
We quantified the rate of carbonate dissolution with increasing water depth by taking the difference in the carbonate mass accumulation rate of deep (3393–4375 m) core top sediments from the shallowest one (3208 m), which we assumed was unaffected by dissolution. This method depends on high quality 14 C dates that we calibrated to calendar years for calculating sedimentation rates. Our results show low (ranging from 0 to 0.3 g cm −2 ka −1 ) and h…
Abstracts of the 7th International AMS Conference
The AMS program at the S. Paulo 9MV Tandem accelerator has been initiated with major emphasis on projects based on the determination of 10Be, 26Al and 36C1 concentrations
The Late Quaternary Sedimentary Record of Reykjanes Ridge, North Atlantic
Variability in surface and deep ocean circulation in the North Atlantic is inferred from grain-size characteristics and the composition of terrigenous sediments from a deep-sea core taken on Reykjanes Ridge, south of Iceland. End-member modeling of grain size data shows that deep-ocean circulation in this area decreased significantly during periods of maximum iceberg discharge. The episodes of reduced circulation correlate with the cold and abrup…
C Wiggle-Match Dating in High-Resolution Sea-Level Research
Comparison of two sets of marsh-accumulation records from each of three Connecticut (USA) salt marshes, one based on individually calibrated dates and the other on wiggle-match dating of the same series of dates, shows that wiggle-match dating results in more precise and objective reconstructions of longer-term (10 2 –10 3 yr) changes in accumulation rate. On (sub-)century time scales, wiggle-match dating can reveal steps in the calibrated marsh-…
In-Situ Radiocarbon Production by Neutrons and Muons in an Antarctic Blue Ice Field at Scharffenbergbotnen
In the radiocarbon accelerator mass spectrometry ( 14 C AMS) analysis of gases obtained in a dry extraction from a 52–m Antarctic ice core, we observed 14 CO 2 and 14 CO concentrations decreasing with depth. The concentrations are explained in terms of in-situ production by neutrons and captured muons in ablating ice. The ratio of the 14 CO2 concentration to that of 14 CO has been found to be constant at 1.9 ± 0.3. The ablation rates obtained of …
A Novel Approach for Developing High-Resolution Sub-Fossil Peat Chronologies with 14 C Dating
Sub-fossil sections from a Florida wetland were accelerator mass spectrometry (AMS) dated and the sedimentological conditions were determined. 14 C data were calibrated using a combined wiggle-match and 14 C bomb-pulse approach. Repeatable results were obtained providing accurate peat chronologies for the last 130 calendar yr. Assessment of the different errors involved led to age models with 3–5 yr precision. This allows direct calibration of pa…
On the Erosive Trail of A 14Th and 15Th Century Hurricane in Connecticut (Usa) Salt Marshes
This paper examines if an erosive hiatus found in the peat stratigraphy and marsh-accumulation record from northwest Hammock River Marsh (HRM), Connecticut (CT) can be attributed to a 14th or a 15th century hurricane, each documented by a radiocarbon-dated overwash fan in Succotash Marsh (SM) (Rhode Island) about 90 km to the east. Given that (i) the best estimate age range for the 15th century overwash deposit in SM (1400–1440 cal AD, 2 σ) overl…
Near-Zero Δ 14 C Values at 32 kyr cal BP Observed in the High-Resolution 14 C Record from U-Th Dated Sediment of Lake Lisan
A high-resolution atmospheric radiocarbon record has been obtained for the interval of 17–36 kyr from U/Th-dated aragonite sediment of Lake Lisan. Reservoir age corrections were applied with reservoir ages of 200, 1250, and 2000 yr, which correlate with the different water levels of the lake. The present 14 C record for Lake Lisan shows near resemblance with that of Lake Suigetsu: both converge to the value of Δ 14 C ∼0‰ at 32 kyr cal BP. Both al…
Solar-forced 2600 BP and Little Ice Age highstands of the Caspian Sea
Geology (10 works) · Geology and Paleoclimatology Research (10 works) · Paleontology (10 works) · Radiocarbon dating (9 works) · Oceanography (8 works) · Geography (7 works) · Archaeology (6 works) · Archaeology and ancient environmental studies (5 works) · Chemistry (5 works) · Physical geography (5 works)