Geoscience AnalyticsBrowser apps for geoscience
The Geoscientist’s Workbench

No install required, stay in your browser, work on any device.

The apps run the checks and plots that usually live in spreadsheets and desktop programs, on the same Excel and CSV exports from your database, with every method explained. Geoscience Analytics Toolkit brings it all together.

Open the Toolkit → Learn + free Excel workbooks →
A QC Analytical Results CUSUM chart: lead results for a reference material reading high for months, then low, crossing both control lines. A QC Analytical Results Shewhart chart for silver in a reference material, with nine results in a row below the mean picked out by Nelson rule 2. A QC Analytical Results rolling median chart of duplicate precision through time, against the stage limit and the action limit. The QC Analytical Results Overview: Lab Confidence for a laboratory, the headline finding and four cards for accuracy, precision, contamination and despatch coverage.

QC Analytical Results

QC assay data: standards, blanks and duplicates, from one upload. A lab performance dashboard, accuracy and precision charts.

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Free. Try it on demo data, no account needed.
A 3D lower-hemisphere stereonet, tilted towards the viewer, with Kamb density contours and the bedding poles. A contoured stereonet of bedding poles from the Stawell-Ararat area, with Kamb contours, the best-fit girdle and the fold axis. A strike rose of the same bedding, with its mean axis of 176 degrees and the 95% confidence of the mean. A drillhole strip log of structure dips and dip directions, coloured by bedding, joint and fault zone, beside fracture frequency down the hole. The map: Geological Survey of Victoria bedding readings as strike-and-dip symbols on satellite imagery. A number beside a symbol counts the readings at one site.
Coming soon

Structural Analysis

Orientation data from mapping and oriented core: stereonets with contours, rose diagrams, orientation sets, maps and drillholes in 3D.

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Data: Geological Survey of Victoria (CC BY 4.0) and a synthetic drillhole. Map imagery: Esri, Maxar, Earthstar Geographics, and the GIS User Community
A drillhole strip log: lithology with FGDC patterns, alteration, and gold and copper assays on one depth scale, with significant intercepts shaded. Gold and copper assays down a hole, with three significant intercepts shaded and listed as length at grade, and the method written out. The printable PDF log with a company and title header, hole details, intercepts, a patterned legend and the log columns. Data health: each finding in the workbook with its severity, rows, why it matters and what to do.
Coming soon

Drillhole Analysis

Drillhole data: strip logs of lithology, structure and assays on one depth scale, significant intercepts, sections and 3D hole traces.

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Demo data (Project J). Lithology patterns: FGDC (public domain)
Learn · free downloads

The statistics behind the checks

Articles and Excel workbooks on QA/QC of assay data: control charts, duplicates, robust statistics, and what they will and will not tell you about your laboratory. Free to read and download, no sign-in. If you read one thing, read The Impact of Geological Variation when Quality Controlling Precision.

Go to Learn → Free workbook: Shewhart and CUSUM (Excel) Free workbook: repeated median regression (Excel) Free workbook: change-point analysis (Excel)