Real data description

For MT3DINV4, the real data to be inverted are from Zones 2 & 3 in the Raglan mining district in northern Quebec. The data were acquired by Quantec Geoscience of Toronto in 2017, and comprise data at 164 distinct locations. Fourteen sites were repeated (denoted then an "R" in the filename), so the total number of data files is 178. For these 14 locations, you are to choose which of the two sites to use.

The data and reports are publicly available and can be viewed on the Province of Quebec's Examine web site here

The original Quantec data are in EDI SPECTRA format and can be downloaded from here.

The spectra data have been converted into RhoA/Pha estimates and their errors in J-format and can be downloaded from here.

A Quantec logistics report on acquisition is available here.

NOTE 1: These response estimates are "raw" and are unedited, and need inspecting and careful editing prior to inversion. Problems in the data if uncorrected may lead to spurious erroneous inversion model artefacts.

NOTE 2: Hz was not acquired, so there are no Tipper data. Ignore spurious Tipper values in any files.

NOTE 3: You can ignore the four sites that sit outside the main array, sites MT1301, MT1312, MT1330 and MT1331.

Corrected data description

Glencore is permitting me to release a modified version of the Assessment, Analysis and Correction report I wrote for them on these data, and also to release the corrected data after applying the correction approach described in the report. These corrected data should not be taken as definitive - you need to decide for yourself whether to model the original data, after your own corrections, or to model these data.

Download my Assessment, Analysis and Correction report here.

Download my corrected data in EDI format here.

Download my corrected data in J-format here.

Submitting your model and model results

Inversion model

Unfortunately, we as a community have failed to come together and agree on a universal model file format.
Here are some acceptable formats for the MT3DINV4:

• RLM: Randy Mackie format, for rectilinear meshes. Can be imported directly into Viridien's Geotools software package.
• UBC: UBC format. Can be imported directly into Geotools. Comprises two files, a 3D mesh file and a 3D model file.
• xyzv: An xyzv file is the most mesh-agnostic. Each xyzv points defines the centre of a cell at (x,y,z), of property value v. Two adjacent cells in X would have their boundary at (x1+x2)/2, same for Y and Z.
• Other formats may be added to this list.

Model responses

Please submit BOTH the data you inverted and the responses of your inversion model in EDI format.

Please include the following additional information in your submission email: