U-th he dating

An in situ que for U–Th–Sm/He and U–Pb double dating.

Auscope Geo History Facility, John de Laeter Centre, The Institute for Geoscience Research (Te R), Applied Geology/Applied Physics, Curtin University, Perth, WA, Australia.

U,Th-He dating of gold - TK Asian Antiquities

The increased productivity (less time required to generate an age relative to conventional methods), ability to circumvent the multiple-handling steps previously required for double dating (SHRIMP/LA-ICP-MS U–Pb and conventional (U–Th–Sm)/He), (U–Th–Sm)/He and U–Pb ( trace elements) single crystal double dating of zircon and other U-rich accessory phases.

U,Th-He <i>dating</i> of gold - TK Asian Antiquities

ARHDL He Dating

Zircon grains of known and unknown age (‘standards’ and ‘unknowns’, respectively) were arranged in a grid on Kapton polyimide film on a clean glass thin section slide and firmly pressed into a 25 mm round piece of Teflon (Du Pont PFA, Type 6000LP) preheated on a hot plate at 230 °C until softened.

Helium, uranium and thorium analyses of ancient and modern gold.

We found that this type of Teflon does not excessively degas and allows us to reach the desired ultra-hh vacuum pressure ( mbar) after 8 hours of pumping (usually overnht).U-Th/He Lab U-Th/He and U-Pb Geo-Thermochronometry Lab

U-th he dating:

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