A5057044166- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Isotope Analysis in Ecology
- Geochemistry and Elemental Analysis
- High-pressure geophysics and materials
- Arsenic contamination and mitigation
- earthquake and tectonic studies
- Analytical chemistry methods development
- Groundwater flow and contamination studies
- Heavy metals in environment
- Radioactive element chemistry and processing
- Mercury impact and mitigation studies
- Electrokinetic Soil Remediation Techniques
- Environmental Toxicology and Ecotoxicology
- Geophysical and Geoelectrical Methods
- Geothermal Energy Systems and Applications
- Heavy Metal Exposure and Toxicity
- Mass Spectrometry Techniques and Applications
- Field-Flow Fractionation Techniques
- Process Optimization and Integration
- Geophysical Methods and Applications
- Enhanced Oil Recovery Techniques
- Mine drainage and remediation techniques
- CO2 Sequestration and Geologic Interactions
- Soil and Unsaturated Flow
Tsinghua University
2024
State Key Joint Laboratory of Environment Simulation and Pollution Control
2024
Queen's University
2019-2023
Trent University
2005-2010
University of Saskatchewan
1993-2008
China University of Geosciences
1991-1995
Three komatiite‐tholeiite sequences from the Archean Abitibi Southern Volcanic Zone (SVZ), which are separated by major terrane boundaries, show systematic differences in composition, rare earth element (REE) patterns and high field strength (HFSE) /REE fractionation. Komatiites Tisdale Township Al‐undepleted, with MgO = 12–24%, Al 2 O 3 /TiO 13–17, CaO/Al 1–1.3, Ni (722–1275 ppm) Cr (1875–2820 contents. Mg‐tholeiites Fe‐tholeiites spatially associated komatiites. Both komatiites have flat...
Precise and accurate analysis of Hg isotope compositions in environmental samples can be an invaluable tool investigating cycles the environment. We have developed a method for high precision using gold trap sample introduction system coupled to Thermo Finnigan MC-ICP-MS. Environmental were pyrolyzed at temperature released from was collected traps. The on traps then thermally into extended signal duration, which would otherwise short transient if directly plasma, thus significantly...
In order to address the correct reporting and therefore comparison of isotopic measurements across different instrument types instrumental techniques a prepared set synthetic standards was sent 28 laboratories for boron (B) analyses. Standards were from enriched purified salts avoid any sample preparation fractionation. The range in uncertainties analyses between analytical is as large differences within an technique obscuring systematic offset. We conclude that measurement δ11B values often...
A new method has been developed for the simultaneous determination of AsV, monomethylarsenic (MMA), dimethylarsenic (DMA), AsIII, and arsenobetaine (AsB) in aqueous samples. The utilizes a multi-mode ion exchange column coupled with hexapole collision cell inductively plasma mass spectrometer (ICP-MS). mixture 10 mM NH4NO3 0.05% HNO3 was used as mobile phase, pumped by high-performance liquid chromatography (HPLC) pump running an isocratic mode at flow rate 0.4 mL min−1. Under these...
The concentrations of 27 trace elements in the basalt BIR‐1, as well other mafic rock reference materials, have been determined by ICP‐MS, using pure elemental solutions for external calibration and standard additions. Concentrations rare earth BIR‐1 new ICP‐MS data, agree with compiled values, previous ID‐SSMS results, whereas data on HFSE's are systematically higher about 40% to 70% than ID‐SSMS, but consistent generated at laboratories.
Isotope ratios were measured from the low mass (25Mg/26Mg) to high (203Tl/205Tl) region, using an ELAN 5000 and a Platform Hex-ICP-MS, investigate bias effects on two instruments. For 5000, percentage discrimination per atomic unit (MD%) varies 5% for 25Mg/26Mg 0.7% 203Tl/205Tl, whereas it ranges 10% 0.11%, respectively. The has higher at lower region compared 5000. difference in between instruments is attributed different ion transferring lens system, i.e., electrostatic system hexapole...
Greenstone belts in the northern Murchison Terrane of Yilgarn Craton contain an extensive suite 2.9–3.0 Ga, porphyritic komatiites and komatiitic volcaniclastic rocks. These unusual Ti–rich Al–depleted have been sampled at Gabanintha are characterised by higher incompatible‐element abundances than most suites Barberton‐type komatiites. They form a petrogenetically related group with similar Ti– incompatible‐element‐rich, rocks from Karasjok Norway, Dachine French Guiana Steep Rock‐Lumby Lake...
The influence of site-specific conditions on contaminant bioavailability and toxicity to benthic invertebrates is a key consideration in the environmental risk assessment process. This particularly relevant for contaminants with complex speciation chemistries, such as arsenic. present study addressed uncertainties regarding arsenic mayfly (Baetis tricaudatus) under low dissolved oxygen (DO) characteristic many contaminated sites. Arsenic (arsenite, As(III); arsenate, As(V)) nymphs was...