What Iolite does so far…

As noted in the last post we’re all buzzing after Goldschmidt (of course from the workshop, but also from a whole week of stimulating discussions), and we’re now busy working on Iolite 3 among other things. But in the midst of all of this looking forward it occurred to us that this might be a…

Changes in the new UPb DRS (“U_Pb_Geochronology3”)

There are some noteworthy improvements in the latest release of the UPb DRS (U_Pb_Geochronology3), so I thought I should post a description of what’s changed. One of the biggest changes is that flexibility has been added in which isotopes have been measured – previous versions required 206, 207, 208, 232, and 238 (with an option…

Programming Basics for Iolite

We’re getting a lot of users that want to customise the way Iolite processes their data, which is really exciting as it’s exactly why we built Iolite in the way that we did. But we realise that there may be many more that just find getting into the programming code a little too intimidating, or…

How to add more globals to a DRS

This is just a quick tutorial to show you how to add more global variables or global strings to a DRS. These globals are useful because they’re acessible via the Edit Settings window, which means that people not comfortable with the code can quickly and easily view and modify them (e.g., the “ReferenceStandard” global string).…

Uncertainty propagation – how it works

We’ve had a bit of interest in propagation of uncertainties in Iolite, so I thought I’d try to do two things in this post and the next. In this post, I’ll have a go at describing our protocol for propagating uncertainties. There is a description of the method in Paton et al. (2010), but I’ll…

Using splines in a DRS

In this post I’m going to give a description of how someone making or modifying a DRS can take advantage of the DRS support functions included in Iolite for working with splines. I’ll use the existing “Sr_isotopes_REE” DRS as an example – it’s distributed with Iolite, which should make life easy for anyone that wants…

Switching between DRS

The ease with which you can rapidly switch between different elements for internal standardisation and different reference materials for external calibration (see last post) is one of the great strengths of Iolite. This can be extended to the DRS level too. If, for example, in addition to standard U-Pb geochronology, you wish to do some…

Benefits of the Trace Elements_IS DRS

Those new to Iolite will notice that there are two version of the Trace elements DRS, called simply Trace_Elements and Trace_Elements_IS. Which one do I use? Well, if you are analysing a whole bunch of samples with similar major element composition (e.g. speleothems or corals where you can reasonably expect stoichiometric behaviour), or you are…