2 edition of Sulphur Isotope Study of the Muskox Intrusion, District of Mackenzie, (86 J/13, O/3). found in the catalog.
Sulphur Isotope Study of the Muskox Intrusion, District of Mackenzie, (86 J/13, O/3).
Geological Survey of Canada.
|Series||Paper (Geological Survey of Canada) -- 68-46|
article, we report the results of a sulphur isotope study of phosphate-bound sulphate from the Meishucun Section and several correlative sections in South China. Forty clastic, granular phosphorites from Meishucun yield tightly grouped ä34S values averaging 33‰ (CDT), which agree well with published. Also, the carbon and sulphur isotopic composition of crude oil can give insights into the source of crude oil spills. Using the Thermo Scientific™ Delta V™ and Plus™ Gas IRMS instrumentation one can determine not only the makeup of a complex hydrocarbon mixture, but also the stable isotope composition of each molecular component of.
The stable sulfur isotope ratio between 32 S and 34 S of solid and dissolved sulfur compounds is widely used as a marker for bacterial sulfate reduction and bacterial processes associated with the recycling of sulfide (5, 8, 18).The reduction of sulfate by sulfate reducers is coupled to a pronounced enrichment of 32 S in the produced sulfide. However, the extent of the isotope enrichment. AbstractGypsum crusts on 18 important historical monuments in Prague were investigated from the point of view of theIr sulfur Isotope composition. The ratio of 34S and 32S in deposited sulfates expressed in the delta unit (δ 34S) is almost constant for every monument but a significant difference occurs between monuments in the center of the city and those located on the surrounding hills.
relatively rapid ﬂuctuations allow for correlation of sediment sections using sulphur isotopes. Sulphur isotope reconstructions based on the analysis of carbonate associated sulphate or marine barite result in sulphur isotope records with an age resolution of 1–5 million years (Ma), and for some age intervals the resolution is. Isotope abundances of sulfur. In the above, the most intense ion is set to % since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which totals % for all the naturally occurring isotopes.
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Get this from a library. Sulphur Isotope Study of the Muskox Intrusion isotope study of the Muskox intrusion, District of MacKenzie (86 J/13, O/3). [Akira Sasaki]. Sulfur isotope evidence for the rise of atmospheric oxygen first appeared in the earliest Paleoproterozoic as well. Guo et al.
() identified a transition within the Duitschland Formation, where a mass-independent sulfur isotope signal with small δ 34 S fractionations (typical of Archean samples) is replaced by a mass-dependent sulfur isotope signal with large δ 34 book fractionations.
Shows how stable isotope abundances may be used to differentiate between natural and anthropogenic sulphur in the environment. Basic principles and analytical techniques are included as well as documentation of the relevant research taking place in different parts of the world.
Sulphur isotope study of the Muskox intrusion, District of Mackenzie (J/ 13, 0 / 3). Sulfur isotopic composition of the Triassic igneous rocks of eastern United States The sulfide ores of Sudbury. The ±4Ma Muskox intrusion is one of the largest layered intrusions in the world and is the intrusive centre the giant Mackenzie-Coppermine-Muskox igneous event, widely attributed to the Author: J.
Chamberlain. In this paper we study the sulphur isotope composition in the groundwater of the Cm–V aquifer system at its northernmost margin in North-Estonia.
Our goal is to reveal the origin of sulphate and the factors controlling the sulphur and carbon isotope geochemistry in the aquifer system's water and rock matrix, and to test evidence of bacterial.
Sulphur Isotopes in Nature and the Environment: An Overview 5 system would then have an isotopic distribution between that of its prior condition and equilibrium (Figure ).
Kinetic isotope effects-isotope fractionation in unidirectional process. A new approach to constraining seawater δ 34 S and sulphate concentration using francolite‐bound sulphate reveals an abrupt increase in δ 34 S to +50‰ around the Early–Middle Cambrian boundary.
Such high δ 34 S values are best explained by increased rates of pyrite burial due to ocean anoxia coupled with an increased sensitivity of the ocean sulphate reservoir to perturbations due to.
The element sulfur has four stable isotopes 32 S, 33 S, 34 S and 36 S with the following natural abundances: %, %, %, and % (Hoefs, ).Most commonly, the two major isotopes (32 S, 34 S) are being measured and results expressed as δ 34 S, defined by the following equation.
Sulphur isotopic signature can also be used to trace an anthropogenic source even when it is highly diluted and cannot be detected by basic chemistry (Otero & Soler ).
A case study of the use of sulphur isotopes in assessing impacts of mining on natural waters is presented in the following Closedure web page. Recent advances in mass spectrometry now allow relatively routine measurements of sulphur isotopes (δ 34 S) in small samples (>10 mg) of tissue from archaeological human, plant, and faunal samples.
δ 34 S values of human and faunal bone collagen can indicate residence or migration and can provide palaeodietary information. Here we present a review of applications of sulphur isotopes to.
Sulphur isotope shifts between early and late-stage alkaline rocks have been reported at individual syst31,32,33 and our global compilation demonstrates the ubiquity of this process. CAhlAmANA 9AN22I TheAcidDepositionResearchProgramisfundedandadministeredbytheProvinceof Alberta,theCanadianPetroleumAssociation,Alberta.
Correlative fractionation relationships of sulphur isotope data for coexisting sulphate and sulphide pairs from hydrothermal ore deposits on δ 38 S versus Δ 34 S diagrams are deciphered theoretically. Taking into account dissolved H 2 S and SO 4 2‐ in hydrothermal fluids during precipitation of both sulphate and sulphide minerals, a 4‐species closed system is suggested for describing the.
The proportion of sulphur found in vegetation increases as an industrial sulphur dioxide emission source is approached, but this trend is modified by topographic extremes. Stable sulphur isotope analysis revealed that increased sulphur concentrations in arborcal and terricolous lichens, andPicea glauca needles were due to incorporation of sulphur emitted as sulphur dioxide by the Kaybob sour.
Sulfur (16 S) has 23 known isotopes with mass numbers ranging from 27 to 49, four of which are stable: 32 S (%), 33 S (%), 34 S (%), and 36 S (%). The preponderance of sulfur is explained by its production from carbon plus successive fusion capture of five helium-4 nuclei, in the so-called alpha process of exploding type II supernovas (see silicon burning).
The Isotopic Analysis of Sulphur and Oxygen C.E REES AND B.D. HOLT THE ISOTOPIC ANALYSIS OF SULPHUR* Introduction This chapter is concerned with the ways in which sulphur samples are treated chemically, converted to a suitable gaseous form, and analysed mass spectrometrically.
In order for sulphur isotope analyses to be useful it is. The presence of mass-independently fractionated sulphur isotopes (MIF-S) in many sedimentary rocks older than ∼ billion years (Gyr), and the. The Buttle Lake camp is in central Vancouver Island, southwestern British Columbia, Canada.
The camp hosts world-class polymetallic volcanogenic deposits of Devonian, Frasnian age (Ma). This paper describes an on-going sulphur and lead isotope study of the major orebodies.
Sulphur isotopes were determined for sulphides (pyrite, chalcopyrite, bornite and galena) and sulphate (barite). Stable isotope geochemistry is concerned primarily with the relative partitioning of stable isotopes among substances (i.e., changes in the ratios of isotopes), rather than their absolute abundances.
The difference in the partitioning behavior of various isotopes, otherwise known as fractionation, is due to equilibrium and kinetic effects. VINOGRADOV () indicated identical sulphur isotope ratios for some eleven stone meteorites found in the U.S.S.R. giving an S32/S34 value of for each meteorite.
During the past 6 years a careful study has been made of the sulphur isotope ratio.Sulfur (S) has 25 known isotopes with mass numbers ranging from 26 to 49, four of which are stable: 32S (%), 33S (%), 34S (%), and 36S (%).
The preponderance of sulfur is explained by its production from carbon plus successive fusion capture of five helium nuclei, in the so-called alpha process of exploding type II supernovae (see silicon burning).Stable carbon, nitrogen and sulphur isotope analysis of permafrost preserved human hair from rescue excavations (, ) at the precontact site of Nunalleq, Alaska Isotopic evidence (C, N, S) for a high aquatic dietary contribution for a Pre-Dorset muskox hunter from Umingmak (Banks Island, Canada).