U_Pb_Geochronology

least magnetic heavy minerals heavy minerals bomb

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Unformatted text preview: ur, morphology, etc.) Least magnetic heavy minerals Heavy Minerals Bomb dissolution Column chemistry Dry onto filaments Analysis by TIMS Dissolves zircon under pressure Isolates U and Pb Puts U and Pb onto filaments ~50 kg sample from field Edges of zircon grains removed Grain mounts IN-SITU U-Pb GEOCHRONOLOGY analysis by SHRIMP or LA-ICP-MS Air Abrasion CONVENTIONAL U-Pb GEOCHRONOLOGY Interpretation and age Can you guess why U-Pb geochronology is so expensive? Wednesday, 15 August, 12 Heavy minerals Interpretation and age http://www.esslabshop.co.uk/ acatalog/ Retsch_Disc_Mill_DM200.html Wednesday, 15 August, 12 http://www.ga.gov.au/image_cache/ GA4015.jpg Photos Courtesy of Doug Tinkham Wednesday, 15 August, 12 Photos Courtesy of Doug Tinkham Wednesday, 15 August, 12 Photos Courtesy of Doug Tinkham Wednesday, 15 August, 12 http://epsc.wustl.edu/geochronology/wirfley.htm Wednesday, 15 August, 12 http://epsc.wustl.edu/geochronology/wirfley.htm Wednesday, 15 August, 12 Wednesday, 15 August, 12 99NC19B: Pop. A We...
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This document was uploaded on 03/06/2014 for the course ES 4502 at Memorial University.

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