tIgpet 13/June/2024

January 12,2023

New versions for Mac and Windows

Igpet has improved symbol capability. Symbol files (*.sym.txt) can be customized so that each symbol has its own line width and a scale factor (between 0.2 and 2.) This allows small, medium and large forms (e.g. triangles) with line widths increasing with the scale factor.

The Windows version has an all new code signing process. The new certificate will last for one year but anything signed during the life of the certificate will last indefinitely. Software does not last long because operating systems change and eventually some fatal change will be made.

tIgpet versus Igpet

tIgpet is software for Windows and Mac computers. Igpet models common Igneous processes including, fractional and equilibrium crystallization, a variety of partial melting models, assimilation and magma mixing. The t indicates that these versions of Igpet are free. They are intended primarily for students but also for trial use by professionals who are considering purchasing the professional version of Igpet. The tIgpet implementation provides bit-mapped diagrams whereas the professional implementation provides vector diagrams that can be modified easily in illustration programs such as Adobe Illustrator, CorelDraw or Inkscape. The Windows and Mac versions are identical now.

Purpose

Igpet makes it easy to examine and analyze a comprehensive Igneous data set. Examination starts with simple diagrams that provide IUGS recommended nomenclature (TAS and QPAF diagrams) and other common discrimination diagrams  such as AFM and SiO2 versus K2O. Numerous other diagrams attempt to define the tectonic setting of rocks using weathering resistant trace elements. 

After identifying the rocks, the next step is to determine the igneous processes responsible for the variation within a rock suite and the suite's overall composition. By comparison with published examples, many igneous processes can be tentatively identified. However, numerical testing of hypotheses is essential and Igpet makes this easy. Theses and research reports at all levels will be strengthened by the tools provided in Igpet.

Suggestions for use

Three useful documents are available below. Before downloading and installing the software, please at least glance at the three supporting documents; the Publication, the Manual and the Workbook. Notice that the Manual has a Tutorial starting on Page 1. The Tutorial is the easiest way to learn to use the software. All software requires a learning curve, try the Tutorial, it will save you time and expose you to most of the tools in Igpet. 

Two appendixes to the Manual attempt to describe advanced features and explain the inner workings of Igpet.  Most of the algorithms in Igpet came from the equations in  Introduction to Geochemical Modeling (Albarede, 1995) so Igpet is a toolbox for implementing basic numerical petrology/geochemistry.

The Workbook (written in 2016) is an attempt to show how to use Igpet. It has a dozen exercises that span entry level to advanced use. Consider the Workbook a valuable extension of the Tutorial because it leads you through most of the advanced features of Igpet and emphasizes that forward models can prove hypotheses wrong but, by their nature, do not lead to a single correct answer.

Igpet Paper 

Please download this article and cite it if appropriate.

Carr, MJ, and E Gazel, 2017. Igpet software for modeling igneous processes: examples of application using the open educational version. Miner Petrol 111:283–289 DOI 10.1007/s00710-016-0473-z

Finally, the computer code for the two most important calculations in Igpet are provided as text (.txt) files in the Xojo language, an object oriented language that evolved from BASIC.        Spimix code       Spimod code 

Installation Instructions 

Mac software 

Security rules require installation of two folders; one to Applications, another to Documents.

1. Download Install-tIgpet-2024.dmg  

2. Double-click the dmg. A disk image called tIgpet-2024 should appear on the desktop. Inside are two folders. 

3. Move the IgpetDocs folder to your Documents folder. It MUST be placed there for Igpet to locate critical information.

4. Move the Notarized-tIgpet folder to Applications and open it. There are three Apps. It is a good idea to make aliases for the Apps and copy them to the Desktop or the Dock.

5. Read  the Manual! The IgpetManual is a pdf file in the IgpetDocs folder. Read it,  especially p 21; Common Problems

6. Starting with Mac OS Catalina, all Apps had to be Notarized and the Igpet Apps have been submitted and approved. Notarization means Apple has examined the compiled code of an App and detected no malware. The first time you run each of the Apps, you will get Apple’s notarization statement. You may also be asked if the App can use the Documents folder. Click Allow.

Windows software 

Downloads are:    Windows Installation Instructions (read this first)

                                        Install-tIgpet-win2024.zip    Download it and unzip it. 

First, read the Installation Instructions. 

Follow the instructions.

To make Desktop icons, open File Explorer and navigate to this folder:

C:\Program Files\tIgpet-win

Make shortcuts for CIPW, Mixing and tIgpet-win.  Place the shortcuts on the desktop or wherever you like.

Read  the Manual! The  IgpetManual is a pdf file in the IgpetDocs folder

Read the Manual, especially,  Common Problems