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Rhenium Osmium Ntims

RIF Radiogenic Isotope Facility

Selby D and Creaser R A (2004) Macroscale NTIMS and microscale LA-MC-ICP-MS Re-Os isotopic analysis of molybdenite Testing spatial restrictions for reliable Re-Os age determinations and implications for the decoupling of Re and Os within molybdenite Geochimica et Get price

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[166] Luck J M Turekian K K Osmium-187/Osmium-186 in manganese nodules and the Cretaceous-Tertiary boundary[J] Science 1983 222(4624) 613—615 [167] Blum J D Pellin M J Calaway W F Young C E Gruen D M Hutcheon I D Wasserburg G J Resonance ionization mass spectrometry of sputtered osmium and rhenium atoms[J] Anal Get price

Creaser Robert

Rhenium-osmium geochronology of arsenopyrite in Meguma group gold deposits Meguma terrane Nova Scotia Canada Evidence for multiple gold-mineralizing events [2005] U-Pb tantalite Re-Os molybdenite and 40Ar/39Ar muscovite dating of the Brazil Lake pegmatite Nova Scotia A possible shear-zone related origin for an LCT-type pegmatite Get price

Advances in Earth Science

Rhenium-Osmium (Re-Os) isotopic dating applied to the geochronology of hydrocarbon accumulation has been the forefront of international research in the last 10 years and has achieved significant achievements However our current researches are lacking in Re-Os isotopic chronology on the geochronology of hydrocarbon accumulation Get price

Mthode De Datation Re

Re est normalement de 4 Le rhnium et l'osmium sont tous deux fortement sidrophiles (se liant facilement avec le fer) et le rhnium est par ailleurs chalcophile (se liant facilement avec le soufre) cette mthode est donc trs utilise pour la datation des minerais de Get price

Rhenium Osmium Systematics

The Rhenium-Osmium Clock 187 Rhenium is slightly radioactive 187 Rhenium converts into 187 Osmium when a neutron decays to a proton (β decay) Half life - 42 3 billion years (~ 10 x age of Earth) Osmium is compatible (no preference in absence of iron) Rhenium is highly incompatible Any rock that undergoes melting in the mantle stops its Re Get price

rhenium osmium ntims

For the NTIMS measurements rhenium and osmium fractions are loaded (separately) on filaments (commonly Pt) that have to be cleaned to remove any rhenium background and are measured as negative ReO 4 − and OsO 3 − ions respectively Measurements can also be done by ICP-MS Get price

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Suzuki K Qi-Lu Shimizu H Masuda A Determination of osmium abundance in molybdenite mineral by isotope dilution mass spectrometry with microwave digestion using potassium di- chromate as oxidizing agent Analyst 1992 117 1151— 1156 Morgan J W Walker R J Isotopic determinations of rhenium and osmium in meteorites by Get price

Appendices for Holdsworth et al magmatism exhumation and

negative thermal ionization mass spectrometry (ID‐NTIMS) An aliquant of molybdenite together with a known amount tracer solution (isotopically normal Os + 185Re) are digested and equilibrated in a carius tube with 1ml 11N HCl and 3ml 15N HNO3 for 24hrs at 220˚C Osmium is Get price

Osmium

Re

We have been independently pursuing a similar program with the direct aim of determining possible variations in the initial (Os-187)/(Os-186) ratio or Re-Os closure age of different classes of iron meteorite We have applied NTIMS to Os extracted from the most common group of iron meteorites the IIIAB Get price

Du Andao He Hongliao Yin Ningwan Zou Xiaoqiu Sun Yali

Du Andao He Hongliao Yin Ningwan Zou Xiaoqiu Sun Yali Sun Dezhong Chen Sizhen and Qu Wenjun 1994 A study on the rhenium-osmium geochronometry of molybdenites Acta Gelogica Sinica 68 339～ 347(in Chinese with English abstract) Get price

Evidence for rapid weathering response to climatic

However their concentrations remain high as 187 Os/ 188 Os i values decrease after the Toarcian CIE which suggests a minimal influence of a detrital component of rhenium and osmium to the osmium isotopic signature (see Fig 3 Methods and SI Dataset 1) Get price

Section 1 Introduction

Osmium purifications were originally accomplished by the author using a glass distillation apparatus The volatile Os tetroxide was generated by mixing dissolved rock with ceric sulphate then distilling through a water-cooled condenser Osmium gas was trapped and Get price

LETTER Evidence for a meteoritic component in impact melt

isotopic ratios of osmium and rhenium were determined using the sensitive negative thermal ionization mass spectrometry technique (NTIMS CREASER et al 1991) following methods described by KOEBERL and SHIREY ( 1993 ) (see also caption to Table 2) Get price

Timing of Source Rock Deposition in the Georgina Basin

of rhenium and osmium isotope signature in hydrocarbons to delineate migration comparison of NTIMS analyses and sample and spike masses The decay constant used was 1 666 x 10-11 a-1 Timing of Source Rock Deposition in the Georgina Basin Australia Subject Get price

Laboratory for Isotope Analysis

Finnigan MAT 261 NTIMS Method Determination of Osmium isotope ratios which are used in several geochemical problems (e g Platinum-Osmium as well as Rhenium-Osmium dating of ore or rocks) Furthermore there is also a high potential of this geochemical tracer in archaeology in particular in determining the region from which metal artefacts Get price

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A new method of the measurement of the isotopic ratios of rhenium and osmium by negative ionization mass spectrometry (NTIMS)was developed In the procedure of Os measurement first H Br Os on the filament was reduced to Os metal in high vacuum then the mixed solution of Ba (NO3)2 and NaOH was used as an emission auxiliary Get price

Apatite fission

and the Western Canadian Oil Sands using Platinum Palladium Osmium and Rhenium Implications for global petroleum systems Earth and Planetary Science Letters v 313 p 95-104 Lillis P G and Selby D 2013 Evaluation of the rhenium–osmium geochronometer in the Phosphoria petroleum system Bighorn Basin of Wyoming and Montana USA Get price

Scientists Discover That 40 Percent Of The World's Gold

16-9-2002Rhenium-187 is the radioactive form of the element NTIMS directly dates minerals by counting the number of their rhenium-187 and osmium-187 atoms Rhenium-187 has a half -life of 45 billion years or about 10 times the age of our solar system It decays into osmium-187 So by determining the ratio of radioactive rhenium-187 to daughter osmium Get price

Determination of Iridium in Natural Waters by Clean

Methods for the precise routine measurement of Ir in seawater riverwater and estuarine water using isotope dilution negative thermal ionization mass spectrometry (ID-NTIMS) have been developed After equilibration with a 191Ir-enriched spike Ir is separated from solution by coprecipitation with ferric hydroxide followed by anion exchange Get price

osmium isotope

The determination of osmium concentration and osmium isotopic composition in copper concentrated and waste residue by ICP-MS was investigated Samples were dissolved with Na2O2-NaOH melt Osmium was distilled as OsO4 from H2SO4-KMnO4 solution and separation from rhenium Get price

High

High-precision Measurement for the Concentration and Isotopic Composition of Rhenium and Osmium in Micro-amount of Geological Samples CHU Zhu-yin1 CHEN Fu-kun1 WANG Wei1 2 XIE Lie-wen3 YANG Yue-heng3 (1 Laboratory for Radiogenic Isotope Geochemistry Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Get price

Osmium Isotope Constraints on the Origin of Highly

Osmium Isotope Constraints on the Origin of Highly Siderophile Elements in the Earth's Primitive Upper LATE ELEMENTS HIGHLY SIDEROPHILE OSMIUM PRIMITIVE UPPER MANTLE RHENIUM Bibliographic Code Using negative thermal ionization mass spectrometry (NTIMS) Re and Os abundances were determined by isotope dilution and 187Os Get price

Influence of H_2O_2 on the Signal Intensity of Rhenium

Qualitative study was made to the yellow precipitate appeared in the dissolution of pyrite in sealed Carius tube with high temperature and high pressure Influence of H2O2 added with routine reverse aqua regia on the signal intensity of rhenium and osmium measured by ICP-MS and equilibrium of isotope exchange was also studied Results showed that Get price

Rhenium

Rhenium–osmium isotopic plot for target rocks and impact glasses from the Bosumtwi impact structure Ghana and Ivory Coast tektites that were derived from that crater The huge difference in the Os isotopic ratios between tektites and impact glasses and the crater basement rocks is Get price

Canadian Centre for Isotopic Microanalysis (CCIM)

Research (Crustal Re-Os Geochronology) Development of Re-Os geochronology for crustal matrices has been ongoing since 1998 in the laboratory This work has resulted in major advancements in the direct isotopic dating of crustal sulfide minerals petroleum source-rocks Get price

1 Introduction

The largest world rhenium producer is currently Chile followed by the United States Peru and Poland [20] The hypothesis that rhenium-content of molybdenite could be enhanced in the rhombohedral polytype was raised by the study of molybdenite polytypism addressed in detail forty years ago [21-24] Get price

NAVER 학술정보 The remarkable Re–Os chronometer in

The Re–Os (rhenium–osmium) chronometer applied to molybdenite (MoS2) is now demonstrated to be remarkably robust surviving intense deformation and high‐grade thermal metamorphism Successful dating of molybdenite is dependent on proper preparation of the mineral separate and analysis of a critical quantity of molybdenite unique to each Get price

Daniel Marinov Anglo American Exploration Peru SA

Re-Os Molybdenite Geochronology from Michiquillay and Galeno Porphyry Copper Deposits Cajamarca Per Daniel Marinov Anglo American Exploration Peru S A Piso 9 – 371 Calle Esquilache Lima Peru 27* *Corresponding Author Cardero Group 2300 - 1177 West Hastings Street Vancouver BC Canada V6E 2K3 Abstract Get price

Rhenium Osmium Ntims

Rhenium Osmium Ntims Rhenium Osmium Systematics - GitHub Pages 187 Rhenium converts into 187 Osmium when a neutron decays to a proton (β decay) Half life - 42 3 billion years (~ 10 x age of Earth) Osmium is compatible (no preference in absence of iron) Details Service Online Get price

Accurate and precise Re

Keywords rhenium osmium molybdenite Galway INTRODUCTION SAMPLES AND ANALYTICAL METHODOLOGY Suzuki et al (2001) interpret inaccurate and irreproducible Re-Os molybdenite dates from the Galway granite Ireland to indicate that Re-Os systematics in this mineral have been disturbed by younger fluid interaction Get price

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