Seasonal oxygen depletion (hypoxia) in coastal bottom waters can lead to the release and persistence of free sulfide (euxinia), which is highly detrimental to marine life. Although coastal hypoxia is relatively common, reports of euxinia are less frequent, which suggests that certain environmental controls can delay the onset of euxinia. However, these controls and their prevalence are poorly u...

Located at the intersection of Tethys and Pacific Rim metallogenic belts, Laojunshan polymetallic province in SE Yunnan Province hosts many large-scale W–Sn Sn–Zn deposits. The newly discovered Caiyuanzi medium-sized Pb–Zn deposit is located northern part this has eight sulfide ore bodies. All bodies occur siliceous rocks Lower Devonian Pojiao Formation (D1p). are conformable with stratigraphy ...

In order to understand spatial variations of stable isotope geochemistry in the Quruqtagh basin (northwestern China) in the aftermath of an Ediacaran glaciation, we analyzed carbonate carbon isotopes (dCcarb), carbonate oxygen isotopes (dOcarb), carbonate associated sulfate sulfur (d SCAS) and oxygen isotopes (d OCAS), and pyrite sulfur isotopes (d Spy) of a cap dolostone atop the Ediacaran Han...

1 Cohen Geochemistry Group, Earth Surface Science Institute, School of Earth and Environment, Faculty of Environment, University of Leeds, Leeds, United Kingdom, 2 Rock-Water Interaction Group, Institute of Geological Sciences, University of Bern, Bern, Switzerland, 3 Interface Geochemistry, German Research Centre for Geosciences, Potsdam, Germany, 4 Nano-Science Centre, Department of Chemistry...

1575. Hunt, J.M., Philp, R.P. and Kvenvolden, K.A. (2002) Early developments in petroleumgeochemistry. Organic Geochemistry, 33 (9),

The sulfur isotope geochemistry of the Khibina and Lovozero agpaitic massifs provides an opportunity to understand role plume-lithosphere interaction processes responsible for Paleozoic alkaline igneous activity in north-eastern part Fennoscandian Shield. stable ?S analysis using triple collector ratio mass spectrometer (IRMS) has been carried out on pentlandite, chalcopyrite pyrite from nephel...

Concentrations of sulfur and carbon, and isotopic compositions of sulfur were determined in sedimentary rocks from a section across the terrestrial Permian^Triassic (P^Tr) boundary in the northern Karoo Basin, South Africa. High concentrations of sulfide produced by sulfate-reducing bacteria were found in the sedimentary rocks at and just below the perceived P^Tr boundary. The ratios of organic...

Introduction: The identification of various iron and magnesium sulfates in data from the Mars Exploration Rovers (MER), OMEGA on Mars Express, and CRISM on MRO [e.g. 1-5] provides the impetus to explore analog environments that produce these minerals on Earth. A number of mechanisms have been proposed as models of Martian surface conditions and given the diversity of surface locations on Mars w...

Ghale-madreseh is the first point that the saline and sulfurous streams flow into Tembi River, one of the well-known saline rivers in Khuzestan province, Iran. This river is one of the main sources of increasing Karun River’s salinity, which is the largest river in Iran in terms of discharge. There are three saline and sulfurous springs (Shour-1, Shour-2m and Namak Springs) as well as a drinkab...