Several radio transmitters operate throughout the world in the VLF range, 15-30 kHz, and are used mainly for marine navigation, communication with submersed submarines, and other purposes.  The principle of VLF subsurface exploration is simple.  At large distances from the transmitter, the EM field is effectively planar and horizontal.  A conductor that strikes in the direction of the transmitter is cut by the magnetic vector, and these primary magnetic fields cause electric currents to flow in subsurface conductors.  In another, more recent, theory, the subsurface currents flow along interfaces between bodies of differing conductivity.

The Very Low Frequency (VLF) radio spectrum extends from 3 to 30 kHz. Standard communications receivers do not receive signals that low in frequency. Furthermore, most antennas used with standard communications receivers are optimized for higher frequencies and perform poorly in the VLF spectrum. Because of that, few Radio Amateurs or shortwave listeners have ever heard VLF signals and most know very little about the large number of stations in that part of the spectrum, what those stations are used for, or the nature of VLF radio signal propagation.

However, because VLF receivers and receiving antennas are easy to construct, the VLF spectrum attracts a small number of curious and sometimes very dedicated VLF listeners who want to learn more about this little-known and somewhat secretive part of the radio spectrum.

Signals from powerful VLF stations can be received worldwide. They penetrate deep into the earth and deep into the sea (especially in the lower portion of the VLF spectrum) and therefore can be received by submerged submarines. Though some VLF stations have other purposes, the primary function of most VLF stations is to communicate with submerged military submarines or help them navigate underwater.

http://www.smeter.net/stations/vlf-stations.php

http://sidstation.lionelloudet.homedns.org/stations-list-en.xhtml

Peregrine Diamonds Ltd. reports the discovery of two new kimberlites, named Q1 and Q2, by prospecting on the Company’s 854,000 hectare Qilaq project (“Qilaq” or “the Project”) on Baffin Island, Nunavut, Canada. Qilaq is located on Hall Peninsula, northeast of Iqaluit, the capital of Nunavut, and is adjacent to Peregrine’s Chidliak project (“Chidliak”) where, as reported in a news release on August 4, 2010, the Company has discovered 32 kimberlites in the past two years.

In the spring of this year, Peregrine conducted a 670 line-kilometre helicopter airborne geophysical survey on what represents less than 2% of Qilaq’s area. The 12 geophysical anomalies that were found from this limited survey were prospected and will be prioritized for ground geophysics to be followed by drilling next year. A larger airborne geophysical survey is also being planned for next spring.

Mr. Eric Friedland, Peregrine’s CEO stated “The recent discovery of two kimberlites at surface at Qilaq by prospecting shows that the kimberlite district we have discovered on south Baffin Island continues to expand substantially in area and that this region has excellent potential to host another Canadian diamond mine. Our targeting and exploration methods are producing new kimberlite discoveries at a very rapid pace in Nunavut, and we look forward to more discoveries at Qilaq in the near future. The fact that Qilaq is wholly-owned by Peregrine is especially exciting for our shareholders as it allows us to benefit fully from the value that could result from the potential development of the Project.”

Q1 KIMBERLITE

The spring 2010 helicopter-borne magnetic/electromagnetic geophysical survey revealed a magnetic high anomaly with an estimated diameter of 150 metres associated with a topographic depression that measures approximately 60 metres by 50 metres. Subsequent prospecting led to the discovery of the Q1 kimberlite, represented by large concentrations of coarse-grained KIMs, and kimberlite cobbles and boulders on the surface. Both magmatic kimberlite and probable weathered kimberlite breccia boulders were identified. Pyrope garnet, picroilmenite and chrome diopside grains over 10 millimetres in size were observed on the surface. Clasts of limestone, shale and sandstone, interpreted to have weathered from the kimberlite, are also present on the surface.

Q2 KIMBERLITE

The Q2 kimberlite is located approximately four kilometres south of the Q1 kimberlite and outside of the 2010 airborne geophysical survey. Q2 was discovered through the identification of kimberlite boulders by a field crew that was collecting a follow-up till sample. Subsequent prospecting led to the discovery of two kimberlite outcrops within a surface depression that is more than 80 metres in diameter. At least two phases of kimberlite were identified. One phase is described as being magmatic without limestone xenoliths and the other phase has coarser grained olivine and KIMs and contains limestone xenoliths. Both phases contain olivine, picroilmenite, pyrope garnet and chrome diopside macrocrysts.

Samples from the Q1 and Q2 kimberlites are being sent to the Saskatchewan Research Council for diamond analysis by caustic fusion and results will be reported as they become available. If the diamond results are positive, Q1 and Q2 will be scheduled for drilling as early as possible next year. An exploration summary showing the two new kimberlite discoveries is available athttp://www.pdiam.com/i/pdf/qilaq632.pdf.

QILAQ EXPLORATION UPDATE

Over 300 follow-up sediment samples, related to the seven KIM anomalies identified in 2009, are currently being collected in addition to the prospecting of anomalies revealed from the 2010 airborne geophysical survey in anticipation of a drilling program that is being planned for the next field season. Follow-up geochemical and rock sampling, prospecting and mapping related to precious metals anomalies identified in 2009 is also underway this field season.

Kirrin Resources Inc. today announced the completion of a 1,076 line-kilometre magnetic-electromagnetic (EM) airborne survey of the Key Lake Southwest (‘Key Lake SW’) uranium property located on the southeastern margin of the Athabasca Basin in Saskatchewan, Canada. Fugro Airborne Surveys Corp. of Ottawa, Ontario (‘Fugro’) was contracted to complete the survey. In addition, a review of the technical disclosures following the January 10, 2010 announcements by Delta Uranium Inc. (‘Delta’) and Denison Mines Corp. (‘Denison’) of the expansion of their Phoenix Discovery, just 60 km from Key Lake SW, has revealed many geological similarities between Phoenix and Key Lake SW.

Kirrin’s airborne magnetic-EM survey at Key Lake SW utilised Fugro’s fixed-wing Tempest(R) Digital Time Domain Electromagnetic (DTDEM) system which provides maximum quantitative discrimination of relatively near surface (upper 200 to 300 m) conductivity variations. Kirrin has appointed Condor Consulting, Inc. of Lakewood, Colorado,  to undertake the processing and analysis of the airborne EM and magnetic data acquired by Kirrin. Condor anticipates submitting its report by July.

On January 10, 2010, Delta and Denison reported that high-grade uranium mineralization continues to be encountered on the Phoenix discovery on the Wheeler River Property located in the Athabasca Basin of northern Saskatchewan, and that the results of the fall 2009 drilling program have confirmed that the Phoenix discovery has the potential to host an economically significant, high-grade uranium deposit.

The Key Lake SW property is at the southwest end of the geologically favourable trend that hosts numerous uranium mines and important deposits, including the Phoenix and Millennium deposits, and the former Key Lake mine. Although the Key Lake SW property is believed to be somewhat southwest of the margin of the current Athabasca Basin, there is evidence (regolith encountered in some old drill holes) that indicates the Athabasca Supergroup-Wollaston Group basement unconformity was not far above the present ground surface within the property. Discovery of several ‘Ingress style’ uranium deposits, such as Phoenix (up to 117 m below unconformity), Millennium (up to 100 m below unconformity), Eagle Point (up to 450 m below the unconformity) and some other deposits within the Athabasca Basin, indicate that important uranium deposits can occur from several tens of metres up to a few hundred metres below the unconformity. Hence, there is potential for important basement-hosted uranium deposits to exist within the Key Lake SW property. Regional aeromagnetic data show the Phoenix discovery is associated with a fault which cross-cuts the P2 Rift Fault.

Important features at the Phoenix basement-hosted uranium discovery which are similar to the geological setting at the Key Lake SW property include the geological composition of the host basement rocks, the spatial association with the projected regional P2 fault, and the localization of the Phoenix uranium prospect on cross-cutting faults. Gracie (2009) has postulated that the Key Lake SW property is along the projected extension of both the P2 fault, which extends southerly from the McArthur River mine, and the Key Lake fault, which extends southwesterly from the former Key Lake mine.

The eastern margin of the Athabasca Basin is home to the most productive uranium mines in the world with roughly 25% of the world’s uranium production coming from this area. Kirrin’s target at Key Lake SW is basement-hosted unconformity-type uranium deposits, similar to Cameco’s basement-hosted Millennium deposit, located about 50 km to the northeast; the Phoenix discovery, located about 60 km northeast; and the former Key Lake mine, located about 35 km east-northeast.

Goldbrook Ventures Inc. announces mobilization of men and equipment to its Raglan project, Ungava, Quebec in order to carry out a planned summer field season exploration program.

Belanger Camp will support a large exploration program on the western portion of the Goldbrook properties, and an eastern camp in Kangiqsujuaq (Wakeham Bay) will support activities in the eastern tenures.  Both camps are now operational and receiving field crews. Geological field crews mobilized to these camps during the week of June 21^st.

In total five diamond drill rigs are scheduled for up to 25,000 metres during the 2010 summer season and one base-of-till rig will test geochemical anomalies identified from regional data as well as testing coincident Magnetic-EM targets identified from Airborne data.  Geophysical crews to conduct borehole geophysics and surface EM and magnetic surveys will be deployed in early July.

The 2010 exploration program, with a budget of over $17,500,000, includes a goal of 25,000 metres of diamond drilling in conjunction with an extensive program of prospecting, geochemical surveys and ground geophysics over both the east and west extensions of the productive north and south Raglan horizons. This program will follow-up on the positive results of geological, geophysical and remote sensing surveys completed in these areas over the previous years and which helped with discoveries of extensive nickel-copper-PGE sulphides at the Mystery and Timtu zones.

GEOLOGICAL SETTING

The Raglan Project area is underlain by rocks of the Cape Smith (Raglan) Belt that extends for 375 km across the Ungava Peninsula of Nunavik, northern Quebec, Canada. The Aphebian (Paleoproteozoic) Cape Smith Belt and the Thompson Belt, both hosting Ni-Cu-PGE deposits, are part of the Canadian Circum-Superior Belt that separates the Archean Superior and Archean-Proterozoic Churchill geologic provinces of the Canadian Shield.

Komatiite-associated and komatiitic basalt hosted Ni-Cu-PGE deposits occur in Aphebian greenstone belts in various locations around the world including the Cape Smith Belt, Thompson Belt and the Pechenga Belt, Kola Peninsula, Russia.

Northern Shield Resources Inc. The Wabassi and Max properties are located in northwestern Ontario, 60 km south of the Highbank Lake project and 100 km south of the Ring of Fire Ni-Cu-PGE and Chromite deposits. The properties are being explored for reef-hosted PGE and massive sulphide Ni-Cu-PGE deposits.

The Wabassi and Wabassi North properties were staked by Northern Shield Resources Inc. in 2007 based on the geophysical pattern observed on the magnetic survey published by the Ontario Geological Survey (OGS) in the Fort Hope area, which suggests a layered intrusion. Now four mafic-ultramafic intrusions are known to exist within the two properties.

WABASSI LAYERED INTRUSION
This is a layered mafic-ultramafic intrusion composed of olivine-gabbronorites and norites in the upper (northern) portion. To date, very little exploration has been conducted on the southern portion but it is now believed to represent the lower, and most prospective, levels of the intrusion.

WABASSI LAYERED INTRUSION
This is a layered mafic-ultramafic intrusion composed of olivine-gabbronorites and norites in the upper (northern) portion. To date, very little exploration has been conducted on the southern portion but it is now believed to represent the lower, and most prospective, levels of the intrusion.

WABASSI NORTH INTRUSION
Other than one drill hole, no other exploration has been conducted to date on the Wabassi North Property. Drilling intersected a variety of gabbroic rocks which may, or may not be related to the main Wabassi layered intrusion or the Max peridotite intrusion. The geophysics suggest that this body may consist of composite phases of gabbroic and other mafic/ultramafic phases.

MAX PERIDOTITE INTRUSION
Five drill-holes were completed on this target by Northern Shield in 2007 as part of an option agreement to earn a 50% interest in the property. The body is composed mostly of peridotite (harzburgite) and comprises the most primitive rocks intersected to date within the two properties. The body has high background levels of Ni-Cu-PGE. Geophysics suggests a possible feeder conduit between the Max peridotite and Wabassi North gabbro.

GABBROIC INTRUSION
An intrusion in the southern portion of the Max property (see figure above) has been mapped by the OGS as a gabbroic body, but no exploration has taken place to date on this portion of the Property.

WABASSI LAYERED INTRUSION
The Wabassi intrusion is a well-layered mafic-ultramafic complex with similarities to the Stillwater Complex in Montana, where PGEs are mined from the J-M reef. Rock-types so far identified include, olivine gabbronorites, olivine norites and norites; these are all ideal lithologies in nickel and PGE bearing systems. The intrusion is being explored for Ni-Cu-PGE massive sulphides along the contacts and in feeders, and for disseminated mineralization hosted in “reefs”.

Based on geophysical interpretations and surface sampling, the Wabassi layered intrusion appears to be composed of two districts series, the Cyclic Series and the Layered Series.

Ongoing studies and interpretation of the Wabassi intrusion have isolated two layered sequences that will also be prospected for disseminated reef-type PGE mineralization and chromite. Disseminated mineralization and chromite are not usually detected by airborne EM surveys.

A VTEM survey completed over the Wabassi property has detected three distinct clusters of electromagnetic (EM) anomalies (WAbassi A, B & C.) The strength of the conductors range from moderate to very strong and correspond to magnetic highs. One of the clusters of VTEM anomalies can be traced intermittently along a magnetic feature that has strike length of 2000 meters. The location and geometry of this body suggests it may represent a feeder conduit into the main Wabassi Intrusion. Feeder conduits are ideal hosts for Ni-Cu-(PGE) mineralization. Fragments of nickel-bearing pyrrhotite and blebs of primary nickel-copper mineralization were observed in core from a drill-hole completed in 2008 adjacent to one of the VTEM conductors.

One of the VTEM anomalies at Wabassi.

May 2010.

AGI hosts three separate seminars many times a year. The Resistivity Imaging Seminar covers all aspects of electrical resistivity imaging methods. The Advanced Resistivity Imaging Seminar focuses on the resistivity imaging theory, survey design, in-depth understanding of resistivity imaging methods and hands-on practice of resistivity data processing. The new Marine Resistivity Imaging Seminar focuses on the continuous resistivity profiling (CRP)with an electrode streamer on the water, and underwater resistivity imaging with a bottom cable.

2010 Seminar Schedule and Location

The regional office of the European Association of Geoscientists and Engineers (EAGE) in Russia and other members of the Commonwealth of Independent States invites you to take part in the GEOBAIKAL – 2010 First International Scientific and Practical Conference on Electromagnetic Research Methods to be held in Irkutsk in August 15 to 20, 2010.

The main topics of the conference:

1. Role of electromagnetic methods in studies of geological environment.

2. Hardware solutions for electromagnetic methods.

3. Software for data collection, processing and interpretation.

4. Geological efficiency of electromagnetic methods. Examples of results.

The 2010 exploration programme is scheduled to commence in mid-May with ground geophysics. Ground magnetic and electromagnetic surveys will be conducted over priority geophysical anomalies that have been selected from previously completed airborne surveys. Kimberlite-type geophysical anomalies that have been prioritized based on their geophysical signatures and association with KIMs will be targeted for drilling. Drilling is scheduled to commence in early July on up to eight targets. New kimberlite discoveries will be tested for diamonds by caustic dissolution. In addition, up to 400 KIM samples will be collected as a follow-up to anomalies identified from previous exploration work.

A map showing the location of the known kimberlites and 2009 sample locations, images of four of the geophysical anomalies that will be evaluated by ground geophysics and/or drilling, and some photos of previous field work can be viewed at http://www.pdiam.com/i/pdf/nanuq826.pdf.

PROJECT HISTORY

Exploration commenced at Nanuq in 2003. Between 2003 and 2007, 1,728 KIM samples were collected, 32,183 line kilometres of airborne geophysical surveys were flown and 591 line kilometres of ground magnetic surveys were completed. In 2007, three high priority magnetic low anomalies were drilled by the Company, resulting in the discovery of three diamond-bearing kimberlites, Tudlik (Sandpiper), Naturalik (Eagle) and Kayuu (Hawk), with estimated surface areas of one, seven and five hectares, respectively. The kimberlites at Nanuq are unique in the Western Churchill Province of the eastern Arctic in that they represent the first reported occurrence of “Lac de Gras-type” crater-facies volcaniclastic and resedimented volcaniclastic kimberlites in the region. They are also unique with respect to their late Cretaceous ages (70-80 million years) and are the youngest kimberlites known in the area.