Uranium-series dating of corals in situ using laser-ablation MC-ICPMS

2005 ◽  
Vol 240 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Emma-Kate Potter ◽  
Claudine H. Stirling ◽  
Uwe H. Wiechert ◽  
Alex N. Halliday ◽  
Christoph Spötl
Keyword(s):  
Laser Ablation ◽  
Uranium Series ◽  
Uranium Series Dating

Dating of impure carbonates – Utilizing laser ablation MC-ICPMS to reconstruct initial 230Th/232Th ratios

2020 ◽  
Author(s):  
Julius Förstel ◽  
Sophie Warken ◽  
Andrea Schröder-Ritzrau ◽  
Norbert Frank
Keyword(s):  
Laser Ablation ◽  
Correction Term ◽  
Age Determination ◽  
Systematic Errors ◽  
Individual Measurement ◽  
Uranium Series ◽  
Heterogeneous Samples ◽  
Uranium Series Dating ◽  
Measurement Laser

<p><span>Uranium series dating is a valuable and well-established tool for age determination of carbonates in paleoclimatology. However, detrital contamination can alter results. A correctional term is commonly used to account for additional Th introduced into the sample material as detritus. </span><span>This correction requires to make assumptions about the initial </span><sup><span>230</span></sup><span>Th/</span><sup><span>232</span></sup><span>Th ratio of the detrital material, since it is not possible to extract it from an individual measurement. Laser ablation multi collector ICPMS equipped with multiple ion counting detectors offers the possibility to use an isochrone technique to extract the initial </span><sup><span>230</span></sup><span>Th/</span><sup><span>232</span></sup><span>Th value from heterogeneous samples with a high detrital content. This decreases systematic errors and uncertainties introduced by the detrital correction term and therefore improves the possibility of dating impure carbonates.</span></p>

Radiometric dating of hillslope calcrete in the Negev Desert, Israel

2008 ◽  
Vol 104 (11/12) ◽  
Author(s):  
J.C. Vogel ◽  
M.A. Geyh
Keyword(s):  
Open System ◽  
Negev Desert ◽  
Radiometric Dating ◽  
Jordan Valley ◽  
Partial Recrystallization ◽  
Uranium Series ◽  
Uranium Series Dating

The radiometric dating of calcrete is often problematical because impurities and open system conditions affect the apparent ages obtained. By applying both radiocarbon and uranium-series dating to calcrete in colluvium, it is shown that such conditions can be identified. In correlation with the stratigraphy, it is found that partial recrystallization severely decreases the radiocarbon ages of the upslope and shallower samples further down, whereas incorporation of limestone fragments from bedrock significantly increases the apparent ages of some of the uranium-series samples. It is concluded that the hillslope calcrete at the study site near Sede Beker in the Negev Desert, Israel, mainly developed shortly after 40 kyr ago, at a time when the Jordan Valley was being inundated to form the fossil Lake Lisan. Since their formation would have required higher rainfall than today, the results provide further evidence that the whole region was experiencing an increase in precipitation.

scholarly journals Oldest cave art found in Sulawesi

2021 ◽  
Vol 7 (3) ◽  
pp. eabd4648
Author(s):  
Adam Brumm ◽  
Adhi Agus Oktaviana ◽  
Basran Burhan ◽  
Budianto Hakim ◽  
Rustan Lebe ◽  
...  
Keyword(s):  
Rock Art ◽  
Karst Area ◽  
Uranium Series ◽  
Island Southeast Asia ◽  
South Sulawesi ◽  
Figurative Painting ◽  
Uranium Series Dating ◽  
Cave Paintings ◽  
Minimum Age ◽  
Cave Art

Indonesia harbors some of the oldest known surviving cave art. Previously, the earliest dated rock art from this region was a figurative painting of a Sulawesi warty pig (Sus celebensis). This image from Leang Bulu’ Sipong 4 in the limestone karsts of Maros-Pangkep, South Sulawesi, was created at least 43,900 years ago (43.9 ka) based on Uranium-series dating. Here, we report the Uranium-series dating of two figurative cave paintings of Sulawesi warty pigs recently discovered in the same karst area. The oldest, with a minimum age of 45.5 ka, is from Leang Tedongnge. The second image, from Leang Balangajia 1, dates to at least 32 ka. To our knowledge, the animal painting from Leang Tedongnge is the earliest known representational work of art in the world. There is no reason to suppose, however, that this early rock art is a unique example in Island Southeast Asia or the wider region.

scholarly journals In-situ determination of antimony isotope ratios in Sb minerals by femtosecond LA-MC-ICP-MS

2021 ◽  
Author(s):  
Andreas Benjamin Kaufmann ◽  
Marina Lazarov ◽  
Stefan Kiefer ◽  
Juraj Majzlan ◽  
Stefan Weyer
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Isotope Ratios ◽  
Icp Ms

Here we present a method for in-situ determination of stable antimony (Sb) isotope compositions by ultraviolet (UV)-femtosecond-laser-ablation-multi-collector-ICP-MS (fs-LA-MC-ICP-MS). Metallic antimony and a number of Sb minerals (stibnite, senarmontite, chalcostibite, tetrahedrite,...

In situ deposition of ErNi2B2C films by pulsed laser ablation technique

1998 ◽  
Vol 299 (1-2) ◽  
pp. 15-22 ◽  
Author(s):  
A Canesi ◽  
M.R Cimberle ◽  
C Ferdeghini ◽  
A Diaspro ◽  
P Guasconi ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Ablation Technique ◽  
In Situ Deposition ◽  
Laser Ablation Technique

Accuracy of laser-ablation (LA)-MC-ICPMS Sr isotope analysis of (bio)apatite – a problem reassessed

2016 ◽  
Vol 31 (1) ◽  
pp. 259-269 ◽  
Author(s):  
Wolfgang Müller ◽  
Robert Anczkiewicz
Keyword(s):  
Laser Ablation ◽  
Isotope Analysis ◽  
Sr Isotope ◽  
Plasma Laser ◽  
Interference Correction

Accurate in situ Sr isotope analysis of (bio)apatite via ‘robust-plasma’ laser-ablation MC-ICPMS with negligible 40Ca31P16O and reliable 87Rb interference correction.

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