Geochemical Data

With the Geochemistry folder, you can establish a live link to ioGAS and visualise geochemical data in real time. You can also transfer data between Leapfrog Geo and ioGAS, including data to which query filters have been applied.

This topic describes how to connect to ioGAS and transfer data between ioGAS and Leapfrog Geo. It is divided into:

• Sending Data to ioGAS
• Importing ioGAS Data

To connect to ioGAS, make sure ioGAS is running. Next, right-click on the ioGAS object in the project tree and select Connect:

Once the connection is established, any dataset open in ioGAS will be available from the ioGAS object and can be displayed in the Leapfrog Geo scene window:

The status of the connection to ioGAS is indicated in Leapfrog Geo, and the data file open in ioGAS appears in the Geochemistry folder (e.g. demo.gas).

You can view the data in Leapfrog Geo by adding the ioGAS data object to the scene. When attributes are changed in ioGAS, the display will be updated in Leapfrog Geo. You can also:

• Send from and to data columns across the ioGAS link, analyse the data in ioGAS and import calculated columns as interval tables. This data can then be used for modelling in Leapfrog Geo. See Sending Data to ioGAS.
• Import ioGAS data into Leapfrog Geo as points or intervals. See Importing ioGAS Data.

To terminate the connection to ioGAS, right-click on the ioGAS object and select Disconnect:

Once the connection to ioGAS is terminated, ioGAS data (*.gas) will no longer be available in Leapfrog Geo.

Sending Data to ioGAS

To send data to ioGAS, you must first create a data object from the drillhole data in the project. This process uses data from a single interval table to create a new ioGAS object that can then be opened in ioGAS.

There are two considerations when creating an ioGAS data object:

• Are all data columns you wish to send over the ioGAS link in the same table? Creating an ioGAS data object uses a single interval table. If the data you wish to send is in different tables, create a merged table.
• Are lithology intervals similar in length to assay data intervals or are there significant differences? The solution is to apply a majority composite to the lithology data using the interval lengths from the assay table and then create a merged table containing all the data columns you wish to send over the link.

See Merged Drillhole Data Tables and Majority Composites for more information.

To create a new ioGAS data object, right-click on the ioGAS object and select New ioGAS Data:

In the window that appears, select the table you wish to use for the Base table, then select the columns to send to ioGAS. If you wish to filter the data, select the query filter required from the list.

Enter a Name for the data column and click OK. The new data column will appear as part of the ioGAS folder:

Note that any filter applied to the data is part of the new data object and will be sent to ioGAS over the link.

The next step is to open the data in ioGAS.

Opening the Data in ioGAS

Ensure that Leapfrog Geo is connected to ioGAS.

In ioGAS, select File > Open Link Data. Once the column has been opened, you can use the tools available in ioGAS to analyse the data. That the data is open in ioGAS is indicated in the project tree:

If you have the data visible in the Leapfrog Geo scene, changes made will be displayed in Leapfrog Geo. Here the ioGAS attribute manager has been used to assign colours to the selected values in ten equal ranges:

The changes to attributes are automatically updated in the Leapfrog Geo scene window as long as the link is live.

Sending a New Data Column Back to Leapfrog Geo

To save the changes and send a new data column back to Leapfrog Geo while the ioGAS link is live, select one of the Make Variable From options from the Data menu in ioGAS.

In Leapfrog Geo, the column will be added to the base interval table used to create the new lithology. Here, a column called MRV_Au () has been added to the base table:

Importing ioGAS Data

When Leapfrog Geo is connected to ioGAS and a dataset is open, you can import the ioGAS data into Leapfrog Geo. There are two options:

• Importing ioGAS Data as Points
• Importing ioGAS Data as Intervals

When data is imported as points, it is added to the Points folder. When imported as intervals, data is added to an existing interval table or used to create a new interval table. Whichever method is selected, if the data is changed in ioGAS, it will need to be reimported.

ioGAS version 6.1 and later can send a “Filter” attribute to Leapfrog Geo. If you wish to import this attribute, set it to a category column. This imported column will appear in Leapfrog Geo as a query filter:

Importing ioGAS Data as Points

To import ioGAS data as points, right-click on the ioGAS data object in the project tree and select Import as Points:

In the window that appears, select the data columns you wish to import and how they will be imported. Click Finish to import the data, which will appear in the Points folder. You can then display the points in the scene and work with them as you would any other points object. The new points object will remain in Leapfrog Geo once the connection to ioGAS is terminated.

Importing ioGAS Data as Intervals

To import ioGAS data as intervals, right-click on the ioGAS data object in the project tree and select Import as Interval Values. Select the table to which the imported column will be added or select the option to create a new table. Click Import.

• For a new table, select the columns you wish to import and enter a name for the table. Click Finish. The new table will be added to the Drillholes object.
• For adding the data to an existing table, the process is similar to that for adding a column. Select the columns to import, then click Finish.

 

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