WebMay 6, 2024 · The influence of Ca on Sr isotope analysis was insignificant. The 87 Sr/ 86 Sr ratios obtained for in-house standard apatites AP1 and Slyudyanka were 0.711300 ± 0.000092 (2SD; n = 64) and 0.707752 ± 0.000010 (2SD; n = 44), respectively, consistent with their reference values . WebFeb 27, 2024 · The exploration of hydrocarbon resources plays a critical role in fulfilling the world’s increasing demand for energy. In this regard, the distribution and source rock characteristics of coal measure stratum in the whole basin are important and must be studied. However, systematic research has not been conducted yet. In this study, …
GEOCHEMICAL STANDARD REFERENCE SAMPLES GSD 9–12, …
WebMay 22, 2007 · Reference samples include rock powders originating from the USGS, GSJ, GIT-IWG, synthetic and natural reference glasses originating from NIST, USGS, MPI-DING, as well as mineral (e.g., 91500 zircon), isotopic (e.g., La Jolla, E&A, NIST SRM 981), river water and seawater reference materials. WebMay 31, 2007 · The standard reference samples GSD 1-9 (Xie et al., 1985a), GSS 1-8 (Xie et al., 1985b), and GAu 8-14 (Yan et al., 1995), GPt 1-7 (Yan et al., 1998) were used for quality control Xie et al.,... countryball map of ww2
Geostandards and Geoanalytical Research - Wiley Online Library
WebGeochemical reference materials (GRMs) are natural materials such as minerals, ores and rocks, which are sufficiently homogeneous and available in sufficient quantity to be used … WebMay 22, 2007 · Reference samples include rock powders originating from the USGS, GSJ, GIT-IWG, synthetic and natural reference glasses originating from NIST, USGS, MPI-DING, as well as mineral (e.g., 91500... WebJan 10, 2024 · Geological reference materials (standards) and geochemically blank materials (blanks) are part of the standard procedures used to monitor accuracy and … countryball of the day