Techniques for the high precision measurement of 65Cu/63Cu ratios by multiple-collector plasma-source mass spectrometry has been developed. Two approaches, namely Zn-doping and ''sample-standard bracketing'', have been ...

A combination of detailed petrography and in situ SIMS 207Pb/206Pb micro-chronometry of monazite has been carried out on samples from the Lewisian high-grade metamorphic terrain, northwest Scotland. Two episodes of ...

Geochemical arguments for a layered mantle based upon both lithophile and rare gas element abundances are well established. The negative Clayperon slope, associated with phase changes at 670 km, is expected to impede ...

An investigation of the chemical composition of monazite from a number of localities has been carried out. Samples used include monazites from metamorphic rocks, granitic rocks and a hydrothermal ore deposit. The REE ...

The calibration of U-Pb and Th-Pb ratios in Th-U-rich minerals measured by SIMS usually assumes that there are no matrix effects arising from the compositional difference between standard and sample. Matrix effects have ...

This paper presents a revised chemical purification method of Hf for the measurement of Hf isotope ratios of Fe-Mn crusts on a new generation of double focusing multiple collector plasma source mass spectrometer (MC-ICP-MS).By ...