Archive for category Software

SEG Best Paper award in M&G, New Orleans, 2015

Posted by on Wednesday, 6 January, 2016


The paper from Geotech Ltd. has been awarded as the Best Paper in the Mining and Geothermal sessions at the 2015 SEG annual meeting in New Orleans: “Airborne Inductively Induced Polarization effects in and their removal from the VTEM data from Mirny, Russia”.

As the Committee Chair says: “Out of all the papers presented, it was voted as highest ranking by the session participants”.

The paper is about airborne inductively induced polarization (AIIPTM) effects, which is expressed in the form of numerous negative transients, and observed in the VTEM helicopter time-domain EM (TDEM) data from Mirny, Russia. VTEM data reflect mainly two physical phenomena in the earth: i) electromagnetic induction and ii) airborne inductively induced polarization (AIIP) related to the relaxation of polarized charges in the ground. Typical AIIP effects in the VTEM data from Mirny corrupt only the early to mid-time channels, from 55 microsec to 400 microsec. Moreover, the earliest few time channels, from 18 microsec to 48 microsec, are not affected by AIIP, because the IP effect takes a finite time to build up. Cole-Cole analysis of the AIIP affected VTEM data showed that the frequency factor and the time constant are close to 0.8 and 0.0001s, respectively. Since the earliest time channel data are not affected by AIIP, the resistivity of the shallow ground can still be precisely determined. As a result, the purely inductive VTEM decay can be accurately modelled and used to remove the AIIP effect from later time-channels.


Read More:

Mobile Technology: Making Field Work Easier

Posted by on Tuesday, 23 June, 2015

by  Gemma Barson, on June, 23, 2015

Smartphones and tablets have worked their way into almost all aspects of our lives, including work. While there has been an abundance of business related apps for some time now, it has taken a while for developers to set their sights on more niche areas. It wasn’t so long ago, for example, that the idea of carrying out field work or surveys accurately using a mobile device was laughable. Nowadays however, there are a number of advantages to using such devices in the field, from simply checking out the journals, to using high quality precision software. The fact that a tablet is considerably more transportable than a heavy piece of equipment is perhaps the most obvious advantage, but there are a number of others as well.

Cost and Practicality

Mobile devices and their potential, especially in the world of geophysics, have been a hot topic for some years now. The oil and gas sector was especially quick on the uptake of any mobile innovations, mainly due to the reliance on mobile technology that had already made itself indispensable to the more data focused areas of the industry. The main stalling point for more field focused areas of geophysics was the fact that many geophysicists were reluctant to engage with app programming. As the use of both cloud based computing and storage and mobile devices has proliferated, as well as the fact that mobile devices are now much more powerful, more apps focused on practical geophysical applications are appearing. This is mainly due to the fact that apps themselves are much easier and cheaper to program than when they first appeared. Now, geoscientists are able to apply their knowledge of their field directly into app form, and solve problems or streamline processes in such a way that makes a tablet a valuable piece of field kit. Another advantage to the proliferation of these specialist apps is they are highly customisable – a feature that is often missing from more unwieldy field equipment. Mobile techs and specialist apps have, as a result, opened up a whole new range of possibilities for all levels of projects for geoscientists across the world. One slight drawback of course, is that tablets can be quite fragile, and are not generally designed to withstand wilderness locations. This can be offset by the fact that cloud computing offers a secure, always accessible storage option for key data. Scientists can also take the simple step of making sure their equipment is protected from damage in case of accident.

Popular Apps

In recent years, a number of geoscience solution providers have also turned their attention to app development, either as standalone products or as companion software to other devices or software. The AGI SuperSting is one such example, which allows a number of remote functions to be performed on the SuperSting equipment, as well as a number of functions. The CSEMoMatic is another example of full service modelling software in app form, which could prove to be extremely useful on a field trip. Mobile database apps in particular are especially popular, and are effectively closing the gap between the expensive kit that is exclusively available to scientists, and everyday technology.


Utah University showcased the value and practicality of a geophysics focused app with the High Density Large Woody Debris app which was used for a large scale stream restoration project. As apps get even cheaper and easier to make, increasingly complex science can slowly make its way into the public domain. With the right tools for example (in app form), there is nothing to stop community and citizen science projects from undertaking experiments projects that would previously have required professional level equipment and software.

For the professional world, the use of database apps to streamline field readings, and data flow in general, is likely to have some far reaching, positive benefits to not only geophysics, but the sciences in general. Coupled with cloud computing, increasingly powerful tablets and mobile devices, as well as more wide reaching, faster Wi-Fi access, it might not be long before the tablet and a number of trusty apps are the most important part of any geophysics expedition or field study. Geophysics may not be alone in these developments either, as more and more scientific fields are embracing the power of the app.


GEOMODEL – online time-domain EM data inversion

Posted by on Tuesday, 19 May, 2015

Significant improvements have been made since the last presentation of the webapp on ExplorationGeophysics.Info pages. Now the shareware TDEM data inversion web application ( has easy and comfy Eng-Rus interface, the input supports six different file formats (airborne and ground systems), sounding stations position can be represented on the scalable Google Map, data is showed in a sheet, TEM off-time decay chart and calculated apparent resistivity with time or depth.


















The software can be used with data from WalkTEM, TerraTEM, ProTEM, Geotech airborne VTEM, TEM-FAST 48HPC, Tsikl and other TEM systems. A user can suggest any new data format and provide GEOMODEL developers with corresponded information.

The inversion process is interactive (forward modeling with thickness and/or resistivity changing) or iterative (automatic iterations to get correspondence between calculated and measured decay curve).

The inversion is based on 1D algorithm with support of CSIRO Division of Exploration and Mining and Australian Mineral Institute Research Association (AMIRA), P223F project.


















The next procedures can be done with TDEM Geomodel webapp:

-Import-export TEM data and inversions from a large number of industrial formats, including USF;

-Viewing and analysis of transient field decay curves;

-Editing individual decays or tens of decays together in a fast and easy way;

-Runing 1D inversion and compiling resistivity sections;

-Saving results in ASCII format for further processing and presentation in third-party software (Surfer, Autocad, Geosoft Oasis Montaj, etc.).

-Saving inversion results as resistivity sections and maps in different image file formats.

The next example shows  Geotech airborne VTEM  data inversion (Alberta, Canada):


The development team welcomes user’s comments and suggestions.

Golden Software – from the beginning of the era of personal computers

Posted by on Wednesday, 6 May, 2015




Golden Software has provided ExplorationGeophysics.Info with this material allowing publishing it for exploration geophysicists and geologists.

Founded in 1983 (the history is here..), Golden Software is a leading provider of affordable scientific graphics software. Its customer base includes over 100,000 users involved in hydrocarbon exploration, mining, engineering, business, education, and medicine in 185 countries.

Golden Software offers six products:

  • Surfer for contour and 3D surface mapping,
  • Voxler for 3D data visualization,
  • Grapher for 2D and 3D graphing,
  • MapViewer for thematic mapping and spatial analysis,
  • Didger for digitizing and coordinate conversion, and
  • Strater for well log and borehole plotting.

All products are user-friendly, include numerous advanced features, and support all popular import/export formats. Golden Software keeps customers satisfied by providing them with high-quality, easy-to-use software and the best technical support offered anywhere. All technical support is free with the purchase of their products.

Product Testimonials

Hear what users are saying:

I have been a Surfer user since very early on and really have enjoyed using it. I am an exploration geologist and Surfer has provided me with much useful geologic exploration information over the years.

Bruce Ahler, Exploration Geologist.


Surfer is by far the best software product I have ever used.  It is user-friendly, allows image attachments (wonderful), translucency (wonderful). I gave a presentation of Surfer’s capabilities to fellow co-workers and got a standing ovation.  It sells itself.

Barry Duncan, Senior Associate Geologist, Syncrude Canada Ltd.


Voxler is simply amazing! I find it quite intuitive and powerful. Had no problem figuring it out, and the samples provided with the program were perfect to get me started.  Well, this is another great piece of work coming out of your brilliant shop.

Dr. Istvan Almasi, P. Geol., Hydrogeologist, Dome GeoConsulting Inc.


Voxler makes the creation of high quality 3D data visualizations possible for a small fraction of the price you’d expect to pay and the real-time one-on-one support is better than you could ever dream of in this world today.”

Frankie Stone, Petroleum Exploration


Grapher is such a fantastic program! People always ask our group how we did our graphs, and we show them Grapher. They see it working and go away to buy their own copy.

Sally Finora, Norman B. Keevil Institute of Mining Engineering


Grapher is a fabulous tool for creating presentation-quality software. It is almost infinitely flexible and is not constrained by some of the limitations that hamper my use of other graphing programs.

David Suder, Principal Scientist, Precise Environmental Consultants


As for teaching people simple mapping, I have worked with other mapping programs and always found I could do thematic mapping much faster and more easily in MapViewer which is why I continue to use MapViewer for years.

Tim Freeman, Project Manager, Rotarians Against Malaria, PNG


Didger is an excellent product! I have used it to digitize curves on old graphs so that the old data can be used to create physical and chemical property spreadsheets.

John Kreinbrink, PE


I just used Strater to produce borehole lithology and well construction logs for >1,000 boreholes in a UN project.  Just brilliant!

Thorsten Kallnischkies, geologist and freelance consultant


Support Testimonials

We take great pride in our customer support here at Golden Software. All registered products receive free technical support for the life of the product. We even receive the occasional DOS version inquiry, and we do our very best to answer the question!

Hear what our customers are saying:

This is a great program.  I’ve been an ardent user since the early, text driven, DOS versions.  How any geologist or geophysicist manages without it, I don’t know.

James Moffatt, Principal Geoscientist, Tullow Oil


You know, every time I’ve ever had to re-build a computer, Golden [Software] has always been by far and away the easiest company to deal with.

Bradley Joyce, GIS Manager, GP Strategies Environmental


Thanks for your promptness…but not surprising considering the great service I have gotten in past years.

Mindy Brugman, Revelstoke, BC Canada


Golden Software is listening to its users and is supporting them. There is lifetime customer-service too.”

Kurt Trinko


I appreciate the quick response and great service. Help like this keeps me a loyal and happy Golden Software customer.

Don Chuck, Geological Engineer


Golden Software is in a class all its own! Your software is outstanding.  But, what I really appreciate is when I have a problem, in a matter of minutes I can get a friendly, live, competent technician on the phone. Who else offers that service in this day and age?

Paul Lundegard, Ph.D., Environmental Geoscientist







Golden Software | 809 14th Street, Golden, Colorado 80401 USA | 303-279-1021 | 800-972-1021


A history of the legendary Golden Software – Exceeding Expectations Since 1983

Posted by on Wednesday, 6 May, 2015




Golden Software has provided ExplorationGeophysics.Info with this material allowing publishing it for exploration geophysicists and geologists.

Golden Software has been located in Golden, Colorado since its founding in March, 1983. It was the brainchild of Dan Smith, a graduate student in the Mining Department at the Colorado School of Mines, and of Patrick Madison, a CSM Computer Science Instructor. At that time, personal computers were new and their applications were limited. Mapping applications required mainframe computers and pen plotters.






Together, Dan and Pat developed a printer language that operated on a PC and required only a dot matrix printer. Their program (PlotCall) also offered a dramatic improvement on the level of resolution available in a computer-generated map: most graphics programs of the time produced printouts that were based on “screen dumps.” This limited the resolution to roughly 24 dpi. PlotCall, on the other hand, offered the full resolution of the installed printer–usually 200 dpi resolution (a breakthrough for the time).

As hardware and software technology improved, Golden Software‘s products evolved and remained at the leading edge of scientific graphics software. In 1985, Surfer was the company’s first program to take advantage of technological advances. Grapher followed in 1986 and provided users with graphing capabilities previously limited to manual methods. MapViewer was introduced in 1990, Didger in 1996, Strater in 2004, and Voxler in 2006.

Today, Golden Software has grown to be the leading provider of scientific graphics software in the world. Our customers include researchers in mining, engineering, and medicine, as well as thousands of applied scientists and engineers. We have sold over 300,000 software licenses to date and our products are in use in 185 countries and on all seven continents! Testimonials of some customers you can read here.. 

We keep our customers satisfied by providing the best technical support offered anywhere. 99% of our technical support phone calls receive an immediate response by one of our expert software support engineers. Of course, all technical support is free with the purchase of our products.

We have new products under development at all times, so count on Golden Software to continue supporting your scientific graphics needs!








Golden Software | 809 14th Street, Golden, Colorado 80401 USA | 303-279-1021 | 800-972-1021


Fresh insights on magnetic field from Geosoft

Posted by on Friday, 20 February, 2015



Virginia Heffernan: “Magnetization Vector Inversion (MVI) is a modern technique which is gaining acceptance as an effective tool for subsurface exploration in areas where magnetization does not necessarily run parallel to the earth’s magnetic field, a more common scenario than geoscientists have traditionally appreciated.”

– See more at: Earth Explorer


Inversion electromagnetic survey data in web app

Posted by on Monday, 22 December, 2014

TDEM geomodel is an online software designed for editing, inversion, and interpretation of transient electromagnetic (TDEM) data. It outputs resistivity cross sections and maps which can be superposed on Google maps. Right now it is a shareware web application developed for pre-processing and 1D inversion of transient (time-domain) electromagnetic data. The software can be used for ground and airborne time-domain EM data.

Here is an example of  ground TEM data on-line inversion:


Supervised Neural Network Targeting and Classification Analysis for Mineral Exploration

Posted by on Tuesday, 29 April, 2014

Karl Kwan (Geotech LTD) presented at Canadian Exploration Geophysical Society meeting (8 April 2014) methodology and examples of using Neural Network Targeting and Classification at mineral exploration.

“Geophysical survey contractors routinely offer multi-parameter data to clients. For example, a helicopter-borne survey may acquire Time-domain electromagnetic (TDEM), magnetic gradiometer and even gamma-ray spectrometer data (i.e., VTEMplus, Geotech LTD). Exploration geophysicists can certainly take advantage some of the readily available multi-disciplinary (geology, geophysics and remote sensing) and multi-parameter (potential field, EM, gamma-ray spectrometry, and others) datasets for mineral exploration. However, the integration and interpretation of these datasets can be time-consuming and even challenging, especially for large-scale datasets covering large areas with diverse geological conditions. The Supervised Neural Network (NN) Targeting and Classification technique for mineral exploration described and demonstrated by Reford, Lipton and Ugalde, 2004, “Predictive Ore Deposit Targeting Using Neural Network Analysis” (, can be a useful and promising tool for the analysis of multi-disciplinary and multi-parameter data.

In this presentation, the properties or responses of the two feed-forward multilayer Neural Networks, Levenberg-Marquardt (NN with LM training) and Fast Classification (FCNN), as implemented in the current version by PGW, are studied in detail. The supervised NN simulations are performed on specially constructed synthetic data. Intended as a tutorial and the NNs treated as black boxes, the objectives of the exercise are twofold, to demonstrate the targeting as well as classification capabilities of the Neural Networks, and at the same time to show one of the known limitations and to suggest a way to get around it. The utility of the NN tool is demonstrated again with real cases from the Republic of Niger.”

Geosoft is delighted to host the online portion of the Canadian Exploration Geophysical Society meeting with keynote speaker Karl Kwan, Geotech LTD.


Rio Tinto: “Geophysics playing an increasingly important role”

Posted by on Tuesday, 17 December, 2013



“Despite a steep appreciation in exploration spending over the past decade, the number of greenfield discoveries is falling every year. Narrowing this gap will require harnessing the power of big data and cloud computing, according to a presentation by Rio Tinto’s exploration chief Stephen McIntosh at the International Geophysical Conference in Melbourne.

“In a lot of cases, we have the data but we haven’t got the most out of it because of time constraints and our ability to find or “discover” this data,” Amanda Butt, McIntosh’s colleague and former manager of exploration and geophysics, said in a follow-up interview with Earth Explorer. “Now that we can do things more quickly, and efficiently we can get more effective information out of the data.”

Geophysics, in particular, has become an increasingly important exploration tool as the depth of the average discovery moves from close to surface in the 1950s to hundreds of metres deep. Indeed, geophysics contributed significantly to nine of the 16 greenfields discoveries Rio Tinto has made since 1996, including the Diavik diamond mine in Canada and more recently at the La Granja copper project in Peru.”

the original story

EMIT Maxwell Configuration File for VTEM system

Posted by on Sunday, 10 March, 2013

PDF file

visualization of geophysical data – tips for Surfer users

Posted by on Saturday, 12 January, 2013


“I have been thinking for a while about writing on visualization of geophysical data. I finally got to it, and I am now pleased  to show you a technique I use often.  This tutorial has shaped up into 2 independent posts: in the first post I will show how to implement the technique with Surfer, in the second one with Matlab (you will need access to a license of Surfer 8.08 or later, and Matlab 2007a or later to replicate the work done in the tutorial).

I will illustrate the technique using gravity data since it is the data I developed it for. In an upcoming series of gravity exploration tutorials I will discuss in depth the acquisition, processing, enhancement, and interpretation of gravity data (see [1] and [4]). For now, suffice it to say that gravity prospecting is useful in areas where rocks with different density are laterally in contact, either stratigraphic or tectonic, producing a measurable local variation of the gravitational field. This was the case for the study area (in the Monti Romani of Southern Tuscany) from my thesis in Geology at the University of Rome [2].

In this part of the Apennine belt, a Paleozoic metamorphic basement (density ~2.7 g/cm3) is overlain by a thick sequence of clastic near-shore units of the Triassic-Oligocene Tuscany Nappe (density ~2.3 g/cm3). The Tuscan Nappe is in turn covered by the Cretaceous-Eocene flish units of the Liguride Complex (density ~2.1 g/cm3).”


VOXI: The New Generation of 3D Mining Software

Posted by on Friday, 24 August, 2012

Geosoft VOXI Earth Modelling is among the 3D technologies cited in the Engineering and Mining Journal (E&MJ) article, New Generation of 3-D Mining Software Sets the Scene. The article looks at different technologies, 3D display systems, high-performance cloud computing and robust data management tools, that are contributing to greater understanding of what lies beneath the surface in exploration and mining.”

Read the full article in the Engineering & Mining Journal.

VOXI (Advanced 3D geophysical modelling) is a new geophysical software service that generates 3D voxel models from airborne or ground gravity and magnetic data. VOXI Earth Modelling is accessed through the Oasis montaj software and uses the power of cloud computing to rapidly create 3D models of large exploration datasets.

“Detecting vanadium and graphite deposits with EM methods”

Posted by on Monday, 23 July, 2012


“The recent rush to find graphite and vanadium deposits to satisfy potential demand in green energy applications is reigniting airborne electromagnetic (EM) methods as highly effective exploration tools.”

read more..

VOXI: Presentation.

Posted by on Thursday, 19 July, 2012

The Maxwell and CSIRO Workshop schedule and booking form for 2012 is now available

Posted by on Thursday, 21 June, 2012


The 2012 Maxwell software training schedule and booking form is now available. Please see the PDF below.

Many hardware and software queries can be answered by EMIT staff over the phone. However, for more intensive personalised training, we can organise one-on-one training sessions either at your workplace or at our office in Midland. Alternatively, customised sessions for your acquisition or interpretation groups can be held at your organisation using your data.

EMIT Workshop Schedule and Booking Form 2012 (Maxwell and CSIRO)
EMIT Workshop Agenda – Maxwell
EMIT Workshop Agenda – CSIRO

Participants are encouraged to book four (4) weeks ahead to ensure their desired workshop dates. Each workshop will be confirmed only when the minimum of four (4) bookings have been received. Workshops are limited to ten (10) participants.

The Geosoft VOXI development story

Posted by on Wednesday, 30 May, 2012

Released in April, 2012, Geosoft’s VOXI Earth Modelling service gives exploration geophysicists the ability to convert magnetic and gravity data directly into useful 3D Earth models that can be integrated with other 3D exploration data.

Read more:

Geosoft 2012 update

Posted by on Friday, 4 May, 2012

The Geosoft 2012 Software Release includes updates to Oasis montaj, Target, Target for ArcGIS and GM-SYS Modelling software. New capabilities and workflow improvements help save time and provide greater flexibility when visualizing multidisciplinary geoscience data in 2D and 3D.

Improved 2D to 3D workflows in Target for ArcGIS: The 2D to 3D workflow enhancements, include new display capabilities, and new section import and export options. Layers, such as interpretation layers from sections or plans can now be easily displayed in their correct geospatial orientation within your 3D view. 2D section interpretations can be exported to a 3D georeferenced file, such as shapefiles or DXF files, to be shared with other 3D applications. 3D vector files, such as open pit outlines, and wire frames can now be easily imported to multiple section and plan maps.

3D Viewer improvements: Geosoft 3D gridding methods have been expanded to include IDW and direct gridding; these new methods better support the 3D gridding of a broad range of data types. Angled clipping of objects in 3D views provides the ability to clip parallel or perpendicular to dataset orientation or geological strike. Geoscientists can set a clipping plane that aligns with any direction chosen.

Expanded GM-SYS 3D density model support: Voxels can be used to define the 3D density variation within GM-SYS 3D model layers. This provides more direct integration with 3D seismic data as the generated density cubes may be used directly in the GM-SYS model.

Geosoft has released VOXI Earth Modelling, a cloud-based geophysical inversion software service that generates 3D voxel models from airborne or ground gravity and magnetic data. VOXI is available as part of the Geosoft 2012 Software Release.

Over the past decade, 3D geophysical modelling has become increasingly important to exploration around the world. The ability to convert geophysical measurements directly into 3D images of subsurface rock properties that can be integrated with other exploration information in three dimensions enables resource explorers to extract significantly more insight from geophysical data.

“One of the important benefits of converting gravity or magnetic data into a 3D earth model is that the visual end product allows explorers to see and understand the subsurface using now common 3D viewing platforms,“ said Ian MacLeod, Geosoft Chief Technologist. “VOXI produces a model of rock properties, which can be directly integrated with other surface and subsurface geologic observations. ”

Integration is important, says MacLeod, because no one technique provides all the answers. “Geophysical models often need to be constrained by geological and geochemical observations in three dimensions. Our aim as explorers is to develop the most complete subsurface picture of geology and mineral systems that we can.”

Geosoft experts and industry collaborators have presented on the topic of 3D modelling at a number of global conferences. Here are some highlights:

SBGf Forum paper on Non-Uniqueness in Potential Field Inversion With Application to the Potiguar Basin: by Robert Ellis
ASEG technical paper on Inversion of Magnetic Data from Remanent and Induced Sources: by Robert Ellis, Barry de Wet and Ian Macleod
EAGE presentation on 3D Gravity and Magnetic Model of a Triassic Large Igneous Province Vent in Central Alaska Range, Alaska: by Gerry Connard.
PDAC presentation on VOXI: A cloud approach to Earth Modelling: by Ian Macleod.

In the Community: Geosoft sponsorship supports CET geophysical image analysis research

Geosoft recently announced a Knowledge from Data© Sponsorship to support continuing collaboration between Geosoft and Australia-based Centre for Exploration Targeting (CET). This support will facilitate relevant image analysis research through short-term CET student projects and communication between CET academics and Geosoft.

“Geosoft’s collaboration with the Centre for Exploration Targeting has grown over the years, and we’re pleased to support CET research initiatives through sponsorship,” said Darin Bryce, Managing Director, Geosoft Australia. “We look forward to contributing to applied research and technology outcomes that progress our shared goal of improving the success of exploration targeting.”

The CET’s Geophysics and Image Analysis research initiatives are aimed at making significant and valued contributions to improve efficiency, accuracy and consistency in the use of data for the mining and exploration industry and other geoscientific communities.  The objective is to maximize human intuition and minimize human biases in geoscientific data analysis though computer aided interpretation and computer field technology.