Trace element and isotopic composition of GJ-red zircon standard by laser ablation

Geochemistry, zircon U–Pb ages and Hf isotopes of the Paleozoic volcanic rocks in the northwestern Chinese Altai: Petrogenesis and tectonic implications

“…Zircon GJ1 was used as the reference standard, with a weighted mean 176 Hf/ 177 Hf ratio of 0.282007 ± 0.00008 (2r, n = 19) during our routine analyses. It is in agreement with the recommended weighted mean 176 Hf/ 177 Hf ratio of 0.282013 ± 19 (2r) of the GJ1 (Elhlou et al, 2006). The measured 176 Lu/ 177 Hf ratios and the 176 Lu decay constant of 1.867 Â 10 À11 yr À1 reported by Soderlund et al (2004) Bouvier et al (2008) were used for the calculation of e Hf (t) values.…”

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

“…Zircon 91500 was used as the reference standard for calibration and controlling the condition of analytical instrumentation (Woodhead et al, 2004). The obtained 176 Hf/ 177 Hf ratio was 0.282296 ± 0.000050 (2r) for 91500 and 0.282019 ± 15 (2r) for GJ-1, which is in good agreement with the recommended 176 Hf/ 177 Hf ratios of 0.2823075 ± 0.0000058 (2r) for 91500 and 0.282015 ± 0.000019 (2r) for GJ-1 (Elhlou et al, 2006;Wu et al, 2006).…”

A ∼2.5 Ga magmatic event at the northern margin of the Yangtze craton: Evidence from U-Pb dating and Hf isotope analysis of zircons from the Douling Complex in the South Qinling orogen

“…Helium was used as a carrier gas to provide efficient aerosol delivered to the torch. The instrumental conditions and data acquisition have been comprehensively described by Hou et al [32] Zircon GJ1 was used as the reference standard during our routine analyses, with a weighted mean 176 Hf/ 177 Hf ratio of 0.281996 ± 1 (2SD, n = 12), which is in good agreement with the previously reported data within errors [35,36]. We chose two-stage Hf model age (T Hf2 ) for tracing material source [37].…”