Archive for May 4th, 2012

Prospective Geophysical Anomalies on Cerro Quema, Panama

Posted by on Friday, 4 May, 2012

PERSHIMCO RESOURCES INC. announces additional results from its drilling campaign as well as strong geophysical results which have been received on the airborne campaign covering its 100% owned Cerro Quema Project in Panama. Results of the preliminary geophysics signatures are considered very significant and Management has decided to immediately release the initial interpretation. Complementary information will be available during the upcoming weeks. A few days ago, Pershimco completed an airborne geophysics survey covering all of its 15,000ha Cerro Quema property covering the “Trend” including the LaPava and Quema targets as well as the continuity towards the east.

The survey has been realized by Geotech Ltd. from Toronto using, amongst other techniques, radiometric and magnetic signatures as well as VTEM procedures. Preliminary results already show a strong signature revealing a continuity along the east-west trend through the whole concession showing additional repetitive magnetic and radiometric signatures revealing similar anomalies as LaPava and Quema targets. These signatures will be focused on over the next months in order to build additional mineral resources to the project. South of the “Trend”, a significant high conductivity footprint has also been detected at depth. Pershimco is presently proceeding in the final treatment of the data. Geotech will complete detailed Resistivity Depth Imaging, which includes Resistivity Sections line by line to define the conductors’ geometry with depth, and also will complete 3D magnetic inversions. The footprint is also highlighted by Th-K ratio lows which correlate perfectly with the magnetic sources which will lead to a full analysis of all merged results including the ground IP realized earlier. The Corporation has posted on its web site a map resulting from the Mag survey. Additional tools and maps will be posted as they become available.Mr. Alain Bureau, President and Chief Executive Officer of Pershimco commented on the geophysics: “We were positive about the continuity of the “Trend” and this signature shows the fantastic potential of this oxide corridor. This project still has a lot to offer and to be discovered. The strong conductivity footprint observed south of LaPava also brings us additional information on our deeper sulfides systems.”

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.