Posts Tagged GOCAD

3D Exploration Models for Targeting New Uranium Deposits in the Athabasca Basin

Posted by on Saturday, 2 July, 2011

JNR Resources Inc. reports that it is continuing to develop 3D exploration models to target new uranium deposits on its properties in the Athabasca Basin. JNR is a Saskatoon-based junior exploration company with one of the strongest technical teams in the uranium exploration industry. The Company is focused on uranium exploration in the Athabasca Basin of Saskatchewan and the Deer Lake Basin and Topsails igneous complex of west-central Newfoundland. These regions represent distinct uranium provinces that are characterized by significant uranium enrichment in many of the rock formations. JNR firmly believes that the best exploration approach is through actively exploring on the ground and drilling high-priority targets based on geology, geophysics, and geochemistry.

JNR is one of several uranium exploration companies that is using leading-edge exploration methods and tools in the Athabasca Basin to better understand mineralization processes/criteria for discovering new resources. These methods and tools include PIMA analyses, Pb isotope analyses, APS mineral analyses, 3D GOCAD modeling via a data- and/or knowledge-driven approach, numerical and/or geostatistical modeling, and high-resolution 2D/3D airborne and ground geophysical surveys, including high-resolution airborne gravity (FTG) and electromagnetic (ZTEM) surveys. In this respect, the Company is taking full advantage of the capabilities and expertise of its experienced, multi-disciplinary geological team.

Over the last 20 years, mineral exploration has evolved into a more rigorous quantitative science. A significant part of this exploration science includes a 3D GIS environment in which rich archives of diverse exploration data sets can be integrated, analyzed, and interpreted for the purpose of targeting new ore deposits.  Building these 3D common earth models using the GOCAD environment/software appears to be a very efficient and effective tool for characterizing and exploiting the regional-, district- to mine-scale 3D common earth models of ore deposits and for determining the complex processes that produced the economic mineralization. For example, the complex spatial and geological relationships between lithological units, geological structures, geochemical data, alteration data, and geophysical data can be studied in detail. As well, a wealth of knowledge of ore-forming processes can be integrated into and queried by what-if scenarios within the geostatistical module of the GOCAD environment.

Results to date (2005 – present) from JNR’s 3D GOCAD models (e.g. eastern Athabasca, Way Lake, Yurchison Lake, Moore Lake, and Snowbird/South Dufferin) indicate that we have a much better understanding of the geological environments that we are exploring in and from this we can successfully pick new lithostructural/geochemical/geophysical drill targets in the search for new uranium resources. Ultimately, this will lead to finding new uranium deposits in less time.

In summary, when applied by experienced, multi-disciplinary exploration teams, this data- and/or knowledge-driven mineral potential modeling approach has great potential to enhance greenfield to brownfield mineral exploration activities within all uranium provinces. JNR will next put this to test by drilling some new discoveries along the eastern and southern margin of the Athabasca Basin (e.g. Snowbird/South Dufferin and Lazy Edward Bay).

Dave Billard, Vice President Exploration and Chief Operating Officer comments; “State-of-the-art, science-based exploration techniques are integral to our ongoing and planned exploration programs. For example, we have been able to define superior targets at shallow depths on our South Dufferin/Snowbird projects, which we plan to drill this summer. We believe these targets are lithostructurally related to the Centennial deposit (Cameco Corporation/Formation Metals Inc.) located approximately 20 km northeast and on strike of our properties. At Centennial, a 650-m long mineralized zone grading up to 8.78% U3O8 over 33.9 m has been outlined at approximately 800 m depth (Formation Metals news release May 30, 2011)”.

All technical information for the Company’s exploration projects is obtained and reported under a formal quality assurance and quality control program, details of which are presented on the Company’s website at: www.jnrresources.com/i/pdf/JNR-QAQC.pdf. A glossary of the technical terms included in this release can be found on the Company’s website at: www.jnrresources.com/s/Glossary.asp.


Drill program in Botswana based on geophysical targets

Posted by on Wednesday, 29 September, 2010

Tsodilo Resources Limited  provides an update of its metals exploration activities in northwest Botswana.

Tsodilo has  prospecting licenses located in the Ngamiland District of northwest Botswana (base, precious, platinum group, and rare earth). The presence of sulphides containing copper, nickel and cobalt became apparent while drilling kimberlite magnetic targets in the Company’s Precious Stone – Diamond licenses as reported earlier (see, Press Release of April 20, 2009 on the Company’s website). The Company, through its wholly owned subsidiary, Gcwihaba Resources (Pty) Ltd. (“Gcwihaba”), immediately applied for metal prospecting licenses over this area. These licenses lie directly north of the Hana Mining Ltd. and Discovery Metals Ltd. Copper – Silver (Cu-Ag) projects.

In late 2008, Tsodilo began a drill program based on the positive petrography and element analysis results of core samples obtained from the initial holes that intersected sulphide mineralization. The license area is covered by shallow Kalahari sands and the selection of drill targets is driven by geophysics in the form of Versatile Time-Domain Electromagnetic (VTEM) system, High Resolution Airborne Aeromagnetic data (HRAM) collected on 250 meter spacing and ground magnetic data collected at between 20 and 50 meter line spacing.The combination of these data allows for the identification of both sulphide bearing conductive metasediments as well as metasedimentary and volcanic rocks that have been mineralized by magnetic pyrrhotite minerals. “Our exploration methodology of combining VTEM data with high resolution ground and airborne magnetic data is spot on as our drill targets are sited on conductors and all holes intersect either carbonaceous shales, metapelites, schists or metavolcanics. These metasediments and metavolcanics host massive and disseminated sulphides containing chalcopyrite, bornite, magnetite, and pyrrhotite. The VTEM data was acquired at 2km (2,000m) line spacing and hence the abundance of magnetic pyrrhotite in these sediments makes it possible to complement the electromagnetic data with high resolution magnetic data both along and in-between the VTEM profiles“, states Mike de Wit, President and COO.

The objective of this current phase of the project (Phase 1) is to cover the whole license area of 12,810km2 with a widely spaced drill program (approximately 100 holes and 16,000 meters of drilled footage), focused on regional geophysical targets. As of September 1, 2010, 63 holes totalling 12,828 meters have been drilled inside the metal licenses. The majority of holes drilled so far have been in the Panhandle project west of the Okavango Delta. Presently, the drilling is concentrated on a highly magnetic zone (Xaudum Magnetic Anomaly) in the middle-upper part of the Panhandle project where so far layered magnetite units have been recognised within the metasedimentary sequence. Phase 1 results will further delineate areas of high interest for more detailed exploration and also to produce a robust geological model of the whole area that will drive the more detailed follow-up drilling program of Phase 2. The Company’s recently acquired Paradigm GOCAD(r) software will form the backbone for data management, interoperability, interpretation and modelling of this potential economic mineral deposit.

The metasedimentary sequence of the central Panhandle license area is similar to the stratigraphy described from the Kalumbila Co-Ni-Cu deposit of northwest Zambia and it has been suggested that the Kalumbila carbonaceous metapelites may be the chronostratigraphic equivalent of the Katangan Roan Ore shales which is an important exploration target.


To great resources with Mira

Posted by on Wednesday, 31 March, 2010

Mira Geoscience has held 4 days GOCAD training session in Toronto with support of MacDonald Mines and Energiser Resources.

The Gocad® Mining Suite is the most advanced, easy-to-use, and cost-effective 3D earth modelling system available to the mining, geotechnical, and environmental industries. It is an extension of Paradigm™ Gocad®, the earth modelling standard in the oil and gas industry.

Source: http://twitter.com/MiraGeoscience