VANCOUVER, BC, April 20, 2022 /CNW/ - Norra Metals Corp.
("Norra" or the "Company") (TSXV: NORA) (Frankfurt: 1KO) (OTC: NRRMF) is pleased to
announce that it has completed ~1054-line kilometers, or
219 Km2, corresponding to 100% property coverage,
helicopter airborne magnetic, electromagnetic and radiometric
survey over the area of the Meråker Project ("Meråker" or
the "Project") in central Norway. The objective of the survey was to
obtain a dense high resolution magnetic, electromagnetic and
radiometric dataset over the Meråker area merging the reprocessed
1991 data in conjunction with this new survey. The final dataset
results of a 100m line spacing that
will aid in general understanding of the regional geology of the
area as well as better definition of the previously selected
targets and identify new ones.
The Meråker survey was done under the same agreement between
Norra Metals and NGU (Norwegian Geological Survey) signed for
Bleikvassli Project (see news release of April 12, 2022).
The survey was flown by NGU with a 200m line spacing with 90º azimuth. The average
speed was 109 km/h and height clearance for the magnetometer and
the electromagnetic probe was 45.3m
and for the spectrometer was 75.3m.
NGU had flown over the same area in 1991 (~4250-line kilometers or
850 Km2, 90º azimuth, 200m
line spacing) and the new flight was intended to intercalate the
new flight lines with old ones in a way to increase data density
and resolution (Figure 1). The magnetic and radiometric data from
2021/22 were merged with the data from 1991, except the
electromagnetic survey due to the different type of instruments and
incompatible transmission frequencies.
Figure 1. – Meråker survey area with flight
paths
Mr. Paulo Nuno de Sá Caessa, EurGeol., VP Exploration,
stated, "The acquisition of high-quality and high-density
geophysical data is particularly important for Meråker project
because it covers the entire area of the project and fills the gap
of absence of modern geophysical surveys for several decades. The
future data processing with techniques suitable for understanding
the regional geology, structural and mineralization controls will
aid to define geophysical targets and/or enhance the previous
selected ones."
Airborne Survey Technical
Parameters
NGU used a modified Hummingbird electromagnetic and magnetic
system installed in a Eurocopter AS350-B3 (LN-OSD) helicopter
designed to obtain low level, low speed detailed airborne magnetic
and electromagnetic data. The system was supplemented by 1024
channel gamma ray spectrometer to acquire radiometric data. The
instrument specifications are listed in Table 1.
The magnetic data were recorded at 0.2 second intervals
resulting in approximately 6m average
point spacing. The data was visually inspected and spikes were
removed and after several corrections were applied before
gridding.
The electromagnetic data were recorded at 0.1 second intervals
resulting in data with a sample increment of 3m along the ground on average. The
electromagnetic system transmits five fixed frequencies and records
an in-phase and a quadrature response for each of the four coil
sets of the system. The received signals were processed and used
for computation of an apparent resistivity.
The radiometric data were recorded at every 1 second intervals
giving a point spacing of approximately 30.3m. The radiometric data were processed using
standard procedures recommended by International Atomic Energy
Association (IAEA).
For quality control, the surveys, altitude and navigation data
were monitored on four separate windows in the operator's display
during the flight while they were recorded in three streams to the
PC hard drive.
The above parameters allow for recognizing sufficient details in
the data to detect subtle anomalies that may represent
mineralization and/or rocks of different composition.
Table 1. Instrument specifications
INSTRUMENT
|
PRODUCER/MODEL
|
ACCURACY/SENSITIVITY
|
SAMPLING
FREQUENCY/INTERVAL
|
Magnetometer
|
Scintrex
Cs-2
|
<2.5nT throug. Range
/0.0006nT √Hz rms
|
5 Hz
|
base
magnetometer
|
GEM GSM-19
|
0.1 nT
|
3 s
|
Eletromagnetic
|
Geotech
Hummingbird
|
1-2 ppm
|
10 Hz
|
Gama
spectometer
|
Radiation solutions
RSX-5
|
1024 ch's, 16 litres
down, 4 litres up
|
1 Hz
|
Radar
altimeter
|
Honeywell/KRA-10A
|
±5ft 40-100 ft; ±5%
100-500ft; ±7% 500-2500ft
|
1 Hz
|
Pressure/temperature
|
Honeywell
PPT
|
±0.03% FS
|
1 Hz
|
Navigation
|
Topcon
GPS-receiver
|
±5 meters
|
1 Hz
|
Acquisition
|
NGU custom
software
|
Qualified Person
Mr. Paulo Nuno De Sa Caessa, EurGeol., VP Exploration, who is
the Qualified Person for Norra Metals Corp. and responsible for the
review and preparation of the scientific and technical information
contained in this news release.
About Norra Metals
Norra Metals Corp. (TSX-V: NORA) (FSE: 1KO) (OTC:
NRRMF) is a Canadian-based precious and base metals
exploration company. The Company's Norwegian assets include the
past-producing Bleikvassli polymetallic, zinc-copper-lead-silver
underground mine project and the high-grade Meråker copper-zinc-
gold exploration project. The Company also holds a 100% interest in
the Pyramid copper-gold porphyry project located in Northwest British Columbia. For more
information, please visit www.norrametals.com.
ON BEHALF OF THE BOARD OF NORRA METALS CORP.
Per: "Minaz Devji"
Minaz
Devji, CEO and Director
This press release contains "forward-looking information" that
is based on the Company's current expectations, estimates,
forecasts, and projections. This forward-looking information
includes, among other things, statements with respect to the
Company's exploration and development plans. The words "will",
"anticipated", "plans" or other similar words and phrases are
intended to identify forward-looking information. Forward-looking
information is subject to known and unknown risks, uncertainties
and other factors that may cause the Company's actual results,
level of activity, performance, or achievements to be materially
different from those expressed or implied by such forward looking
information.
Neither the Canadian Securities Exchange nor its Regulation
Services Provider accept responsibility for the adequacy or
accuracy of this release.
SOURCE Norra Metals Corp.