pico envirotec inc. p them them test flight in anada pp- … · 2019-04-22 · the area is...
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Pico Envirotec Inc. P-THEM
16/05/2012
ABOUT PICO ENVIROTEC
Pico Envirotec Inc. (PEI) is a Canadian company, established in 1992. Since 1998 it has been engaged primarily in
manufacturing advanced instrumentation for use in airborne and ground geophysical surveys for mining, oil and gas and
environmental applications. PEI’s core expertise is the development and manufacture of instrumentation for remotely
measuring magnetic, electromagnetic, gravity and gamma-ray radiation data, using real-time data acquisition and precise
satellite (GPS) navigation and positioning. Because of PEI’s close co-operation with other geophysical companies, it provides
complete, integrated, turnkey airborne or ground geophysical systems for acquiring data for mining, oil and gas or
environmental applications. This is made possible by its development of "intelligent" instruments, using advanced state-of-the
-art technology, which facilitates easy and safe integration of just about any sensor or measuring device into a system. The
AGIS (Airborne Geophysical Information System for airborne geophysical exploration), IRIS (Integrated Radiation Information
System for environmental monitoring), P-THEM (Pico Envirotec Transient Helicopter EM System) and PeiCore (Ground Data
Acquisition based on mobile technologies) are PEI’s most successful systems based on this “intelligent” philosophy.
During the many years PEI has been in business, it has installed more than 100 airborne systems on a wide variety of aircraft
and helicopters, for clients that include mining companies, exploration services companies, and government agencies.
Airborne systems designed, built, integrated and installed by PEI are flying in many countries around the world, including
Canada, USA, UK, Austria, Australia, Brazil, China, Czech Republic, Egypt, Finland, France, Germany, India, Italy, Libya, Mexico,
Norway, Russia, Sweden, South Africa and other.
During the same time frame, PEI has also delivered many portable, mobile and base station systems based on advanced
mobile technologies. These systems included sensors for magnetic and/or magnetic gradient measurements and gamma-ray
spectrometry, equipped with GPS synchronization and compact data logger unit. The systems are widely used in geological
exploration, archaeology, environmental and radiation protection tasks around the world.
P-THEM test flight in Canada The Reid Mahaffy Test Site is located in the Abitibi Subprovince. The test site was created in 1999 by the Ontario Geological Survey, initially to enable various airborne geophysical systems to demonstrate their basic performance capabilities.
The area is underlain by Archean (~2.7 b.y.) mafic to intermediate metavolcanic rocks in the south, and felsic to intermediate metavolcanic rocks in the north, with roughly an east-west striking stratigraphy. The survey flights over the Reid
Mahaffy test site were performed in April 2010.
The altitude and direction tests were flown on three lines over the test survey area. The lengths of test lines were approximately 5.3 km with a line spacing of 200 m. All test lines were flown with the transmitter elevation 30 meters above the ground and a survey speed of approximately 55 knots.
On the CDI image, the conductive body under overburden can be seen
on the grid of the observation results at different decay time channels. One can see that early time windows represent overburden which correlates with the known thickness. The conductive body appears on later time channels and remains detectable in late channels
The electrical inversion of the results allows a structure of several vertical conductor slices, forming the con-ductive body, to be distinguished.
More detailed test flights data and information can be provided by request.
Reid-Mahaffy test site
Conductivity-depth image (CDI) over the Reid-Mahaffy test site
PICO ENVIROTEC INC
222 Snidercroft Road
Concord, ON
L4K 2K1, Canada
Phone: +1.905.760.9512
Fax: +1.905.760.9513
E-mail: [email protected]
www.picoenvirotec.com
PP--THEMTHEM Pico Envirotec Time Domain Helicopter EM System
PPP---THEM is a versatile stateTHEM is a versatile stateTHEM is a versatile state---ofofof---thethethe---art timeart timeart time---domain domain domain
helicopterhelicopterhelicopter---borne electromagnetic system. It features a borne electromagnetic system. It features a borne electromagnetic system. It features a
powerful compact transmitter, three axis receiver, powerful compact transmitter, three axis receiver, powerful compact transmitter, three axis receiver,
digital data acquisition and system control. The easy digital data acquisition and system control. The easy digital data acquisition and system control. The easy
operation and high mobility system is well suited for operation and high mobility system is well suited for operation and high mobility system is well suited for
mineral and ground water explorations, nearmineral and ground water explorations, nearmineral and ground water explorations, near---surface surface surface
geological mapping, and environmental study. The geological mapping, and environmental study. The geological mapping, and environmental study. The
light Plight Plight P---THEM system can be towed by a midTHEM system can be towed by a midTHEM system can be towed by a mid---light light light
helicopter such as Bell 206 “Ranger”, MD 500, helicopter such as Bell 206 “Ranger”, MD 500, helicopter such as Bell 206 “Ranger”, MD 500,
AS350 or similar. The system can be easy operated AS350 or similar. The system can be easy operated AS350 or similar. The system can be easy operated
in rough terrain due to its compact size and low in rough terrain due to its compact size and low in rough terrain due to its compact size and low
weight.weight.weight.
The Pico Envirotec Time Domain EM system has The Pico Envirotec Time Domain EM system has The Pico Envirotec Time Domain EM system has
been designed and constructed using the latest been designed and constructed using the latest been designed and constructed using the latest
technologies and experience of specialists, who technologies and experience of specialists, who technologies and experience of specialists, who
have collaborated in the development. The have collaborated in the development. The have collaborated in the development. The
relatively powerful system, with a tight footrelatively powerful system, with a tight footrelatively powerful system, with a tight foot---print, print, print,
provides better spatial underground object provides better spatial underground object provides better spatial underground object
resolution. The full wavelength recorded data resolution. The full wavelength recorded data resolution. The full wavelength recorded data
allows the user to set the data extraction and allows the user to set the data extraction and allows the user to set the data extraction and
processing according to the particular geological processing according to the particular geological processing according to the particular geological
task.task.task.
Pico Envirotec Inc. P-THEM
The standard PThe standard PThe standard P---THEM system is comprised of an 8.6 meter diameter THEM system is comprised of an 8.6 meter diameter THEM system is comprised of an 8.6 meter diameter
nonagon transmitter loop assembly and a 3nonagon transmitter loop assembly and a 3nonagon transmitter loop assembly and a 3---axis receiver suspended axis receiver suspended axis receiver suspended
on the towon the towon the tow---rope, midway between the transmitter assembly and the rope, midway between the transmitter assembly and the rope, midway between the transmitter assembly and the
helicopter.helicopter.helicopter.
The PThe PThe P---THEM system, in its standard configuration, can work powerTHEM system, in its standard configuration, can work powerTHEM system, in its standard configuration, can work power---
independent from the helicopter power supply. A motor generator independent from the helicopter power supply. A motor generator independent from the helicopter power supply. A motor generator
is mounted on the transmitter assembly and balanced to deliver is mounted on the transmitter assembly and balanced to deliver is mounted on the transmitter assembly and balanced to deliver
stable power to the transmitter through the duration of each survey stable power to the transmitter through the duration of each survey stable power to the transmitter through the duration of each survey
mission. Optionally, power can be obtained from the aircraft, if the mission. Optionally, power can be obtained from the aircraft, if the mission. Optionally, power can be obtained from the aircraft, if the
helicopter has sufficient power reserves.helicopter has sufficient power reserves.helicopter has sufficient power reserves.
The PThe PThe P---THEM transmitter forms a half sign wave pulse of a quarter THEM transmitter forms a half sign wave pulse of a quarter THEM transmitter forms a half sign wave pulse of a quarter
duty cycle length (25% pulse length) with the peak magnetic moment duty cycle length (25% pulse length) with the peak magnetic moment duty cycle length (25% pulse length) with the peak magnetic moment
of 250 000 NIA. The system can support two base frequencies of 250 000 NIA. The system can support two base frequencies of 250 000 NIA. The system can support two base frequencies
depending on the survey requirements (mineral exploration, or depending on the survey requirements (mineral exploration, or depending on the survey requirements (mineral exploration, or
geological mapping in resistive area, etc) adapted to industrial geological mapping in resistive area, etc) adapted to industrial geological mapping in resistive area, etc) adapted to industrial
frequency in the survey area: 30Hz and 90Hz for 60Hz environment; frequency in the survey area: 30Hz and 90Hz for 60Hz environment; frequency in the survey area: 30Hz and 90Hz for 60Hz environment;
25Hz and 75Hz for 50Hz environment. The transmitter current is 25Hz and 75Hz for 50Hz environment. The transmitter current is 25Hz and 75Hz for 50Hz environment. The transmitter current is
recorded through the current monitor channel. recorded through the current monitor channel. recorded through the current monitor channel.
The three axis receiver, attached on the half distance between The three axis receiver, attached on the half distance between The three axis receiver, attached on the half distance between
the transmitter assembly and the helicopter, acquires the full the transmitter assembly and the helicopter, acquires the full the transmitter assembly and the helicopter, acquires the full
vector of the secondary field. Zvector of the secondary field. Zvector of the secondary field. Z---coil data can be used directly coil data can be used directly coil data can be used directly
from observations for an preliminary (fast) interpretation. from observations for an preliminary (fast) interpretation. from observations for an preliminary (fast) interpretation.
The data extraction software has builtThe data extraction software has builtThe data extraction software has built---in operation for the in operation for the in operation for the
acquired data recalculation to X and Z axes along the flight acquired data recalculation to X and Z axes along the flight acquired data recalculation to X and Z axes along the flight
direction. This compensates for mechanical vibrations of the direction. This compensates for mechanical vibrations of the direction. This compensates for mechanical vibrations of the
receiver during the flight. The time derivative magnetic field receiver during the flight. The time derivative magnetic field receiver during the flight. The time derivative magnetic field
(((dB/dtdB/dtdB/dt) or its recovered value () or its recovered value () or its recovered value (BBB) can be obtained from the ) can be obtained from the ) can be obtained from the
survey.survey.survey.
The data extraction, processing and interpretation can be The data extraction, processing and interpretation can be The data extraction, processing and interpretation can be
customized according to exploration tasks in a post mission customized according to exploration tasks in a post mission customized according to exploration tasks in a post mission
mode because of full wavelength data acquisition. Depending mode because of full wavelength data acquisition. Depending mode because of full wavelength data acquisition. Depending
on the survey goals, more attention can be paid to early or to on the survey goals, more attention can be paid to early or to on the survey goals, more attention can be paid to early or to
late windows (time channels). The user may also select wider or late windows (time channels). The user may also select wider or late windows (time channels). The user may also select wider or
narrower windows.narrower windows.narrower windows.
P-THEM schematics; Pulse and response shape
P-THEM System in Gatineau, QC, Canada Buckingham test flight (2009, QC, Canada)
P-THEM System in test flight, 2010
Pico Envirotec Inc. P-THEM
Dipole Moment: P-THEM - 250,000 NIA
Tx Waveform: Half Sine, vertical dipole
Pulse length: 25% - standard
Frequency: Standard: 25Hz/30Hz
Optional: 75Hz/90Hz
Receiver (Rx) : Multi-axes, X, Y, Z
ADC sampling rate: 90 kHz
Time channels (TC): Defined while extraction
TC positions: Programmable
TC width: Programmable
On-time channel: Can be defined while
extraction
Transmitter loop: 8.6 metres diameter
Surface area: 57 m2
System weight : 300 kg
Survey Speed: 50 – 60 knots (standard) (80 – 100 kph)
Tx Loop MTC : 30 meters
Rx MTC: 60 meters
Other equipment: Synchronized Magne-tometer; Gamma-Ray spectrometer
Helicopter MTC: 90-100 meters
Output data format: Binary, ASCII, Geosoft
MTC = Mean Terrain Clearance
P-THEM Specifications
Pico Envirotec has designed dedicated
data extracting and pre-processing
software. EMDataViewer allows
operators to perform express data
quality control, correction of data,
analyzation of data, external noise
filtering, windows extraction and basic
Software
operations in a visual and dialog mode.
The data can be corrected to pulse
amplitude variations, happening due to
altitude/temperature changes.
The extracted windowed data can be
exported into Geosoft or ASCII formats for
further processing and interpretation
using a wide range of software.
Data Extraction and pre-processing software
Data Acquisition software screenshot
Tau Map of the test survey in Aliston Area, ON, Canada, 2010
The Aliston area, located just north of Toronto, Canada is formed by quaternary sediments going to 300 meters depth and underlying Ordovician bedrock corps.
The test flight showed the response of the
P-THEM system to quaternary geology, surface salinity pollution and industrial constructions.
More detailed test flights information can be provided by request.