PPT-Taking account of sulfur isotope geochemistry in the genesis of Irish-type base-metal

Adrian Boyce Tony Fallick and Gary Mullen Drew Drummond and Aileen Doran Scottish Universities Environmental Research Centre SUERC East Kilbride Glasgow Scotland UK Mogul . José Rojas . Echenique. Colorless Sulfur?. Colorless:. Non-phototrophic. Sulfur:. Sulfur oxidizing. Mats. O. 2. H. 2. S. Thiovulum. veil. Thanks Olivia!. Thiovulum. at the gradient. Thanks Isabella!. A Brave New World?. Graham R Carr. CSIRO Exploration and Mining. June 2013. Outline. Traditional Use of Pb Isotopes in Metallogenic Studies. Exploration Geochemistry – . General Principles. Gossans and Residual Soils. Christina . Machak. HMC 2012. Originally named “non-sulfur” because it was thought that they could not use sulfide as electron donor. Can tolerate small concentrations of sulfur, but much lower than green and purple sulfur bacteria. High Concentrations of H. Brassica oleracea. Gracie Gordon. Michael Lorentsen. James Helzberg. http://upload.wikimedia.org/wikipedia/commons/0/03/Broccoli_and_cross_section_edit.jpg. http://upload.wikimedia.org/wikipedia/commons/4/44/Sulfur-sample.jpg. Lecture 30 . Beginnings. Stable isotope geochemistry is concerned with variations in the isotopic compositions of elements arising . small . differences in the chemical behavior of different isotopes of an . Bedtime stories for STEM. By Tom. TALE #1. What dating was like before Match.com. CARBON 14. Carbon 14 dating. Only valid on remains of living organisms. Rarely used for time >BP 20,000 years. C14 CORRECTIONS. Lecture 33 . Stable Isotopes in the Hydrosphere and Biosphere. Isotopic Fractionation in the Hydrosphere. δ. 18. O in the oceans is nearly constant at 0. However, as a consequence of Rayleigh fractionation and temperature dependence of the water-vapor fractionation factor, the isotopic composition of precipitation varies widely.. ‰. ), or “. per mil. ”. . For example. , . δ. 15. N. Air. = . 12 per mil . means that the sample was analyzed against a reference material and found to be 12 molecules per thousand more abundant than in air – . Peter Ota. Content Overview. Thermochemical Cycles. Heat sources for thermochemical cycles. Iodine-Sulfur cycle. Bromine-Sulfur hybrid cycle. Hybrid sulfur cycle. Conclusion. Thermochemical Cycles. Combine heats source with chemical reactions to split water into hydrogen and oxygen. Redox. Potential. pE. = -log free electrons. When corrected to pH 7 (H. . = OH. -. ), called E. h. When E. h . positive – oxidizing environment . When E. h . negative – reducing environment . COMMON plumeswere initially thought to consist of primitive mantle (e.g., Schilling, 1973). As we found, mixing be-tween primitive and depleted mantle can explain the Sr and Nd isotopic compositions Indian Ridge Anyang Pan a, b, c , Qunhui Yang a, *, Huaiyang Zhou a , *, Fuwu Ji a , Hu Wang a , Richard D. Pancost b a State Key Laboratory of Marine Geology, School of Ocean a nd Earth Sci Lecture . 29. Isochrons. This equation has the form . y = a + bx. .. Plotting the radiogenic isotope ratio against the parent daughter ratio, the intercept with be . R. 0. . and the slope will be . e. Requirements of casting alloys:. 1. . They must not tarnish or corrode in the mouth. ;. . 2. They must be sufficiently strong for intended purpose. .. . 3. They must be compatible ( nontoxic ,not allergic.