Chengkaide Hello everyone I have some question about the VizualAge UComPbine DRS. If I use VizualAge UComPbine DRS, the Reference materials data should include the radiogenic Pb ratio value or not? Because Chew et al., 2014 mentioned "The values for the radiogenic and common Pb ratios are retrieved from the appropriate Iolite standard file". But in MAD standard there is a “c207Pb/206Pb”, I want to know iolite will calculate the radiogenic Pb ratio from age or not? Can I use any materials which have ID-TIMS ages, U-Pb measured ratios to be one standard like rutile?
Joe Chengkaide If you're using UComPbine, your reference material file should contain the radiogenic U-(Th)-Pb ratios as well as whichever common Pb ratios are required depending on your settings. If you're using Stacey-Kramers composition, they need to have an "Age" defined. Otherwise, C207Pb/206Pb is needed for a 207Pb-based correction, and C206Pb/204Pb, C207Pb/204Pb, C208Pb/204Pb are needed for a 204Pb- or 208Pb-based correction. The radiogenic composition should also be specified and will not be worked out from the specified age. Yes, you can use any material for which you know the required information. Yes, the 207/206 reference is to allow you to use a different material to calculate the 7/6 ratio. All the best, Joe
Chengkaide What the meaning of the 207Pb/206Pb reference in VizualAge UComPbine? It means we can use another materials to calculate the 207Pb/206Pb ratio? Like SRM 612.
