2005), named after Adak Island in the Aleutians, are also high-Mg andesites, but unlike boninites, they are very LREE enriched (normalized La/Yb > 40), contain high Sr (> 400 ppm), high Sr/Y values, low initial [sup.87]Sr/[sup.86]Sr and low ratios of radiogenic
to non-radiogenic Pb.
The concentration of radiogenic
[sup.40]Ar is calculated from argon isotope ratios that are measured by mass spectrometry.
Heat Production of Granites and Potential for Hot Dry Rock Geothermal Resource in Guangdong Province, Southern China," in Proceedings of the Proceedings World Geothermal Congress, Melbourne, Australia, 2015.
The Sr, Nd, and Pb radiogenic
isotopes have been used to understand magma petrogenesis and also to define the composition of basement rocks through which the magmas raised to the upper crust (Kistler and Peterman, 1973; DePaolo, 1981; Farmer and DePaolo, 1983; Faure, 2001).
Skulski, T., Percival, J.A., and Stern, R.A., 1996, Archean crustal evolution in the central Minto block, northern Quebec, in Radiogenic
Age and Isotopic Studies, Report 9: Geological Survey of Canada, Current Research 1995-F, p.
Although seemingly impressed with our quality control procedures, which led us to identify biases associated with double-counting of cancer cases and an undercount in 1975, the court found fault with what the defendants cited as our failure to conduct analyses of incidence of "the types of cancers known to be radiogenic
" and of cancer deaths.
Therefore, this paper summarizes the geology of the deposit, analyzes fluid inclusions (FIs), and studies C-H-O-S stable isotopes and Pb radiogenic
isotopes to reveal the characteristics and evolution of the ore-forming fluids.
lead [sup.204] Pb corrected for common lead.
The careful use of radiogenic
isotope geochronometers represented a significant advancement in this area and resolved the considerable speculation surrounding the petrogenesis of various deposits, including Carlin-type deposits in Nevada (Tretbar et al.
At doses near natural background radiation levels (approximating many occupational exposure situations), .the range of uncertainty in the lifetime radiogenic
cancer mortality risk is large, and the lower bound of uncertainty likely includes zero (National Research Council 1990).