Posts Tagged Scintrex

GEOPHYSICAL RESULTS: NEW EXPLORATION TARGETS AT KIZILTEPE

Posted by on Friday, 3 June, 2011
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Ariana announced geophysical  test results from their Kisiltepe project in Turkey.

The programme has successfully confirmed the presence of several potential vein systems in the northern half of the prospect area.

Highlights

  • Several resistivity and chargeability anomalies, which may coincide with buried vein systems, located to the northeast of the Arzu South vein.
  • One significant new anomaly coincides directly with an area of extensive quartz vein float from which grades of up to 21.1 g/t Au have been recorded.
  • Significant additional exploration upside defined on the prospect.
  • Exploratory drilling programme to commence within days.

Dr. Kerim Sener, Managing Director, commented:

“These geophysical results coupled with systematic sampling have demonstrated the potential for further significant veins to be discovered at the Kiziltepe prospect.  These geophysical anomalies will be targeted by exploration drilling.  The first phase of this drilling is due to commence over the weekend (27/28 March) and its aim will be to confirm the presence of these buried vein systems or their associated alteration.  There is clear potential at the prospect to increase the current mineral resource and to further enhance the economics of the project.”

Geophysical Programme

The geophysical programme described here was undertaken over a 2km2 area covering the northern half of the Kiziltepe vein field in an area where no veins appear in surface outcrop.  Detailed mapping of the area had previously identified the potential for buried vein systems and sampling of one area of extensive quartz sub-crop outlined grades of up to 21.1 g/t Au in composite rock-chip sampling of float material.

Data was collected from nine northeast-southwest oriented Induced Polarisation (IP) / resistivity profiles, which were spaced 180-230m apart and designed to coincide directly with existing geochemical data lines (total length surveyed is approx. 12km).  A pole-dipole array was used with 30m or 60m electrode spacing, using a Zonge GGT-3 transmitter and a Scintrex IPR-12 receiver operating in the time domain.

Several high chargeability and high resistivity anomalies were identified in the two-dimensional inversion models, which are interpreted to coincide with zones containing vein systems and their related alteration.  Zones with resistivities greater than 150 Ohm.m, in places coinciding with chargeabilities less than 10mV/V, were identified as significant anomalies.

In plan, the distribution of the anomalies is broadly coincident along three distinct trends; one in the immediate vicinity of Arzu South (possibly representing a splay), another directly beneath a hill which conceals part of the Arzu structure and one in the vicinity of the Vein 5 structure.  These trends possibly represent new vein systems at depth, which must be tested by drilling.  An initial programme of drilling comprising several short test holes will be focused on certain of these areas.  No more than 1,000m of drilling is envisaged for this initial programme.

Figure 1 showing an inverse model resistivity (top) and chargeability (bottom) profiles on Line 2 viewed looking to the northeast.  Towards the left-hand side of the sections a resistive body is identified which possibly represents a north-south trending splay off the Arzu South structure.  Approximately midway along the section (just to the left of the 480 mark) is a distinct resistive body which corresponds directly with the area of quartz vein float from which several highly anomalous results were obtained in rock-chip sampling.  Towards the right-hand side (near the 960 mark) a resistive body is coincident with a discrete high chargeability anomaly and this does not correspond to any known vein system and represents a new target area for drilling.


GRAVITY SURVEY FOR CHROME TARGETS IN THE RING OF FIRE

Posted by on Wednesday, 3 March, 2010

MacDonald Mines Exploration Ltd. announces that it has contracted Abitibi Géophysique Inc. to conduct a gravity survey on land-based targets on the Hornby mineral claims, jointly owned by Temex Resources and MacDonald Mines, and on the Company’s 100% owned BigMac Property.

These claims are interpreted to host the potential for a chromite horizon(s). The Hornby Property is immediately south of KWG/Spider’s “Big Daddy” chromite discovery.   Based on the airborne data, Dr. Larry Hulbert, P. Geo, along with Hadyn Butler, P. Geo, have interpreted a number of potential chromite horizons on the BigMac property.  The gravity sections will cross these horizons at five locations varying from 2 to 10 kilometres apart.

The gravity survey will help define drill-ready targets along the interpreted horizons. The gravity survey is expected to be completed by mid-March, 2010.  The gravity technique has proven capable of defining chromite intercepts in the Ring of Fire and have been successfully utilized by both Freewest (Cliffs) and Spider/KWG in their discoveries.

MacDonald will also refocus exploration attention on its McNuggett Property.  Previous drilling results have been the catalyst for the complete re-interpretation of all exploration activity.  Quentin Yarie, P. Geo., MacDonald Mines’ new Vice President of Exploration heads this new initiative and he is being assisted by both consulting geologists Hadyn Bulter, P. Geo, and Dr. Larry Hulbert, P.Geo.  This analysis has outlined previous drill hole areas where the drilling did not fully explain the anomalous electromagnetic conductors.  The revised interpretation has outlined targets that will be drilled in the upcoming exploration program, which is planned to commence in March, 2010.

Abitibi Geophysics is using SCINTREX CG5 AutoGrav for a gravity survey.

Source: McDonald Mines Exploration Press Release, March 3, 2010


Saskatchewan Geological Survey Open House – November 30th to December 2nd, 2009

Posted by on Friday, 27 November, 2009

The 40th annual Saskatchewan Geological Survey Open House will be held at the Delta Bessborough Hotel, Saskatoon, Saskatchewan, November 30th to December 2nd, 2009. Geophysical events and speakers are going to be there:

Ken Witherly (Condor Consulting) who is a big popularizer of geophysics is going to represent: “2009 – Advances in Geophysics – Adapting to Changing Geological Models”;

Dennis Woods (research scientist, university professor, geophysical contractor, mining company geophysicist, and geophysical consultant) and others – “SQUID in Saskatchewan: The Next Level of Deep Electromagnetic Exploration in the Athabasca Basin”;

Clare R. O’Dowd and Garnet Wood (Cameco Corporation, Saskatoon):  “3-D Seismic Investigations at the Millennium Uranium Deposit, Athabasca Basin, Saskatchewan”;

Geotech Ltd. with new airborne EM developments: “ZTEM Airborne Tipper AFMAG Test Survey Over a Magmatic Copper-Nickel Target at Axis Lake in Northern Saskatchewan”;

Dr. Harold Seigel, founder of Scintrex: “Results from the Initial Field Trials of a Borehole Gravity Meter for Mining Applications”.

Good luck!


Azteca Gold Announces Two Mile Down-Hole Geophysics Update

Posted by on Thursday, 19 November, 2009

Richard Nanna, the Azteca Gold Corporation’s QP, has reviewed and has accepted as technically accurate the Scintrex gravilog data, with all relevant correction factors applied, as well as the report dated November 16, 2009  by Geoaviation LLC, an arms-length geophysical consulting company located in Chandler, Arizona, which summarizes the forward modeling conducted on this Scintrex down-hole gravity data.  Down hole geophysical surveys are done in an effort to identify, through the differences in gravity measurements, layers or masses of mineralized material around or immediately below the drill hole.

The Company has until recently been focused primarily on massive sulfide targets at depth.  Recent gravity geophysical results, as well as a re-assessment of previous IP geophysics work,  has given the Company cause for a second focus on carbonate hosted disseminated mineralization, especially as it may apply to potential silver mineralization and to potential mineralization much higher in the drill holes (closer to surface) than previously considered.