Results 241 to 250 of about 5,732,959 (308)

Afghanite: A New Silicate‐Matrix Reference Material for In Situ Halogen and Sulfur Microanalysis

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new silicate matrix reference material for in situ chlorine and sulfur determination. Homogeneous across all measured elements. No matrix effects for Cl when calibrating silicate matrices, in contrast to scapolite, which causes systematic Cl overestimation of up to 13%.
Sebastian Stumpf, Thomas Pettke, Johannes Hammerli, Michael A.W. Marks, Andreas Audétat, Jaime D. Barnes, Julia Dietrich, Renée J. Tamblyn   +7 more
wiley   +1 more source

Influence of HEM Drilling Fluid on Organic Geochemical Characteristics of Deep-Water Source Rocks in the Qiongdongnan Basin. [PDF]

ACS Omega
Zhang Z, Hou D, Cheng X, Yan X, Chen W.
europepmc   +1 more source

SC‐550: A Sintered Calcite Reference Material for In Situ U‐Pb Geochronology

Geostandards and Geoanalytical Research, EarlyView.
Key Points New calcite reference material (SC‐550) produced by high‐temperature and high‐pressure sintering of nano‐particulate powder from a microbial limestone. Homogeneous U content (2.3 ± 0.4 μg g‐1) and U‐Pb isotope ratios (< 0.6% RSD for 207Pb/206Pb; < 3% RSD for 238U/206Pb).
Lorenzo Tavazzani, Nico Kueter, Dawid Szymanowski, Felix Marxer, Ismay Vénice Akker, Marcel Guillong, Massimo Chiaradia, Yannick Buret   +7 more
wiley   +1 more source

Geochemical Characteristics of Trace Elements and Mineralization Model of the Ediacaran-Early Cambrian Phosphorites, South China. [PDF]

ACS Omega
Zhang L, Zhang M, Zhu G.
europepmc   +1 more source

Quantification of Sulfur Speciation in Apatites: Comparison of the XAS, XPS and EPMA Techniques

Geostandards and Geoanalytical Research, EarlyView.
Key Points Sulfur speciation in apatites has been determined by S K‐edge X‐ray absorption near‐edge structure (XANES) spectroscopy, S 2p X‐ray photoelectron spectroscopy (XPS) and electron probe microanalysis (EPMA). XANES provides the most sensitive and accurate quantification of sulfur speciation.
Yuzhou Feng, Yuanming Pan, Leo Ka Long Cheung, Reza Deevsalar, Jason Maley, Huayong Chen, Haoran Dou, Mohsen Shakouri, Qunfeng Xiao   +8 more
wiley   +1 more source

Investigation of rock genesis and geodynamic significance based on Sr-Yb granite classification and geochemical characteristics: A case study from Guangxi, China. [PDF]

Heliyon
Wang H, Xia L, Zhang Y, Jiang J, Fu G.
europepmc   +1 more source

Hydrochem, an Integrated R Package for the Analysis and Visualization of Hydrochemical Data

Groundwater, EarlyView.
We present hydrochem, an open‐source R package that simplifies hydrochemical data analysis through reproducible workflows, automated calculations, and advanced visualization tools. It enables flexible and reliable interpretation of complex water chemistry datasets, supporting researchers and practitioners in groundwater quality assessment and resource ...
Guillaume Cinkus, Raphaël Bondu
wiley   +1 more source

Radiation Assessment and Geochemical Characteristics of ²³⁸U, ²²⁶Ra, ²³²Th, and ⁴⁰K of Selected Specialized Granitic Occurrences, Saudi Arabia, Arabian Shield. [PDF]

Toxics
Heikal MTS, Shereif AS, Csámer Á, Deshesh F.   +3 more
europepmc   +1 more source

Anaerobic Attenuation of Diisopropyl Ether (DIPE) in Groundwater: Kinetics and Implications for Monitored Natural Attenuation

Groundwater Monitoring &Remediation, EarlyView.
Abstract Diisopropyl ether (DIPE) is a branched ether used as a solvent, extractant, and gasoline additive. While aerobic biodegradation of DIPE has been documented, attenuation under anaerobic conditions (typical of groundwater impacted by petroleum hydrocarbons and fuel oxygenates) remains poorly constrained.
Sandra Dworatzek, Kawalpreet Kaur, Trevor Carlson, Jennifer Webb, Ioanna Malton, Melody A. Vachon‐Gregory, Lonnie Mercer, Emmanuel Olisa, Eryn Torres, Shailendra Ganna, George Devaull, Joseph Lentini   +11 more
wiley   +1 more source

Elemental Geochemical Characteristics of Shales from Wufeng-Longmaxi Formations in the Southern Margin of the Qinling Orogenic Belt, China: Implications for Depositional Controls on Organic Matter. [PDF]

ACS Omega
Xiao B, Guo D, Zhao Z, Xiong S, Feng M, Zhao Z, Li S.   +6 more
europepmc   +1 more source