The foundations of stable isotope geochemistry were laid in 1947 by Urey’s classic paper on the thermodynamic properties of isotopic substances and by Nier’s development of the ratio mass spectrometer. Before discussing details of the naturally occurring variations in stable isotope ratios, it is useful to describe some generalities that are pertinent to the field of non-radiogenic isotope geoc...

Isotopic analysis can be performed on minerals, rocks, soil, tissue, gases, and liquids – just about anything. In view of the broad possibilities, we will only cover a few generalities here. In most instances, the element to be analyzed must be first isolated and purified before it can undergo isotopic analysis in a mass spectrometer. Purification is necessary to avoid isobaric interferences an...

The northern flank of the North China Craton (NCC) hosts a linear zone gold, molybdenum, silver, lead, and zinc polymetallic ore deposits. Among these, Yingfang Pb-Zn-Ag deposit is located in central part Yanshan–Liaoxi metallogenic belt (YLMB) which extends for approximately 1000 km forms major mineralized zone. In this study, we characterize mineralization trace genesis based on new sulfur le...

Quantum mechanical electronic structure calculations are playing an increasingly useful role in many areas of mineralogy and geochemistry. This review introduces the density functional method for such calculations, gives an overview of the density functionals developed at the University of Minnesota, and summarizes selected applications using these density functionals that are relevant to miner...

1 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China 2 University of Chinese Academy of Sciences, Beijing, China 3 Department of Civil Engineering, Lamar University, Beaumont, TX, USA 4 College of Environment and Energy, South China University of Technology, Guangzhou, China Correspondence to: C.-J. Lin ([email protected]...

Marine sediments of coastal margins are important sites of carbon sequestration and nitrogen cycling. To determine the metabolic potential and structure of marine sediment microbial communities, two cores were collected each from the two stations (GMT at a depth of 200 m and GMS at 800 m) in the Gulf of Mexico, and six subsamples representing different depths were analyzed from each of these tw...

Cretaceous kimberlites in southern Africa have been suggested to host deeply subducted material their mantle sources based on radiogenic isotope systematics. However, potential contributions the volatile budget, including sulfur, of these is unclear. Here we report new petrographic, geochemical, and isotopic data sulfides sulfates sub-volcanic from Kimberley, South Africa. The examined were div...

Adri C. T. van Duin,†,| Siddharth Dasgupta,‡ Francois Lorant,§ and William A. Goddard III*,‡ Department of Fossil Fuels and EnVironmental Geochemistry, Drummond Building, UniVersity of Newcastle, Newcastle upon Tyne NE1 7RU, United Kingdom, Materials and Process Simulation Center, Beckman Institute (139-74), DiVision of Chemistry and Chemical Engineering, California Institute of Technology, Pas...