Apatite U-Th/He Dating
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U-Th-He dating of apatite: A potential thermochronometer . . .
Apatite (U-Th)/He - dating
(U-Th)/He dating of apatite as a thermal history tool
Apatite (U-Th-Sm)/He date dispersion: First insights from . . .
(U-Th)/He dating of apatite - Geotrack
U-Th-He dating of apatite: A potential thermochronometer . . .
MK-1 Apatite: A New Potential Reference Material for (U-Th . . .
PDF A measurement method for U-Th-Sm/He dating of apatite by . . .
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Printed in U .S .A . LETTER U-Th-He dating of apatite : A potential thermochrononieter P . K . ZEITLER, A . L . HERCZEG, I . MCDOUGALL and M . HONDA Research School of Earth Sciences, Australian National University, GPO Box 4, Canberra, A .C .T . 2601, Australia (Received May 20, 1987; accepted m revised form September 4, 1987) Abstracte found a gem quality . . .
thermo-archaeo .uni-hd .de › research_me_2 .html
Apatite ( U -Th-Sm)/He - dating During the last 10 years the understanding of the diffusion behavior of He in apatite has been increased (Lippolt et al ., 1994; Wolf et al ., 1996, 1998, Farley, 2000) .
www .geotrack .com .au › uthhe › u-th-he-techinfo .htm
( U-Th)/He dating of apatite as a thermal history tool . 1 . Overview . Helium is produced within apatite grains as a result of alpha decay from uranium and thorium isotopes, present as impurities at ppm levels . As reviewed by Lippolt et al . (1994), this process formed the basis of the first attempts at geochronology (Rutherford, 1907a) .
1 . Introduction . Low temperature apatite ( U -Th-Sm)/He (AHe) thermochronology is widely used in Earth Sciences in order to reconstruct the thermal history of rocks, and to quantify uplift and erosion rates in mountain belts and sedimentary basins (e .g . Valla et al ., 2011; Ault et al ., 2019) .However, interpretation of AHe dates may not be straightforward, especially when the thermal history is . . .
( U-Th)/He dating of apatite . Improved resolution of thermal history reconstruction at low temperatures . Geotrack International, in association with CSIRO Division of Petroleum Resources, Sydney, is pleased to announce this new addition to our range of thermal history reconstruction (THR) services . . . .
U-Th-He dating of apatite : A potential thermochronometer . We found a gem quality crystal of Durango fluorapatite to have a 4 He content consistent with complete retention of radiogenic helium since its formation at about 31 Ma . Isothermal heating and step-heating analysis reveal 4 He loss to occur systematically by volume diffusion at low . . .
In this study, we presented dating results of 191 apatite fragments in six different laboratories, which showed highly reproducible dates and Th/U ratios, with an average date of 18 .01 ± 0 .37 Ma . . .
Thermochronology is1 a useful tool for dating thermal evolution of rocks in the upper 2 crust . Thermochronometers have the ability to record the cooling of a rock through varying 3 temperature windows . The apatite U-Th/He system is one of the low-temperature thermochronological systems that records cooling temperatures from4 45-80°C . Apatite U . . .
www .usu .edu › geo › luminlab › Thermochron .pdf
The primary control on He diffusion, T C, and ( U-Th)/He dates in the apatite , zircon, and titanite systems is radiation damage accumulation from actinide decay . This effect is magnified in slow cooling scenarios and results in distinct correlations between individual date and effective U concentration (eU = [ U ] + 0 .235*[Th]) . Date-eU . . .
Figure 1: Conceptual diagram of the pairwise dating method . Age calculation involves the following steps: a . Measure the Th/U-ratio of a standard of known U-Th-He age t s, and calculate the corresponding normalised U , Th, and He abundances (star), where U+Th+He=1; b .Compare the raw mass spectrometer signals (relative to 29 Si for the ICP-MS measurements) of the standard with the corresponding . . .
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Apatite U-Th/He Dating
