INSTRUMENT SYSTEMSFOR ELECTRICAL ANDELECTROMAGNETICEXPLORATION

For additional information about specific instruments, aboutsystems for other application, or about the other productsand services of Zonge Engineering and Research Organiza-tion, please contact our office in Tucson, AZ or visit our website http//www.zonge.com

3322 EAST FORT LOWELL ROADTUCSON, ARIZONA 85716 USATOLL-FREE: 1 (800) 523-9913TEL: 1 (520) 327-5501FAX: 1 (520) 325-1588E-MAIL: zonge@zonge.com

ZONGE ENGINEERING& RESEARCH ORGANIZATION, INC.

4929 PALO VERDE DRIVEFAIRBANKS, ALASKA 99709 USATEL: 1 (907) 474-3679FAX: 1 (907) 474-3684E-MAIL: zongeak@polarnet.net

c/o ALASKA EARTH SCIENCES11341 OLIVE LANEANCHORAGE, ALASKA 99515TEL: 1 (907) 522-4664FAX: 1 (907) 349-3557E-MAIL:zong e@alaska.net

924 GREG STREETSPARKS, NEVADA 89431 USATEL: 1 (702) 355-7707FAX: 1 (702) 355-9144E-MAIL: zongenv@w orldnet.att net

ZONGE GEOSCIENCES, INC.

98 FREDERICK STREETWELLAND, SOUTH AUSTRALIA 5007TEL: (61) 8 8340 4308FAX: (61) 8-8340-4309E-MAIL: zong e@ozemail.com.au

ZONGE ENGINEERING & RESEARCHORGANIZATION (AUSTRALIA), INC.

EDUARDO ORCHARD 1351ANTOFAGASTATEL: (56) 55-268096FAX: (56) 55-259167E-MAIL: zonge@entelc hile.net

ZONGE INGENIERIA y GEOFISICA(CHILE) S.A.

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ZONGE ENGINEERING &RESEARCH ORGANIZATION, INC.

ZONGE provides a broad range of ser-vices beyond the manufacture of instru-ments. These include:

FIELD SERVICES: The company wasfounded as a geophysical service com-pany specializing in electrical and elec-tromagnetic surveys for the mining indus-try. Field services and data interpreta-tion remain an essential part of thecompany’s business.

TRAINING: Training courses in all as-pects of field data acquisition, data pro-cessing, and interpretation are availableat our Tucson office or at the customer’ssite.

CONSULTING: With 26-years of experi-ence in providing field services and data

interpretation of electrical and EM datafor mining, petroleum, and engineeringapplications, ZONGE can provide con-sulting services relating to developmentand conduct of exploration or site char-acterization programs.

PETROPHYSICS LABORATORY:ZONGE maintains a small petrophysicslaboratory for measuring electrical andmagnetic properties of cores and grabsamples. Physical properties routinelymeasured in our laboratory include: bulkresistivity/IP (frequency domain or timedomain), complex resistivity, magneticsusceptibility, remnant magnetism, wet/dry bulk density and porosity.

SERVICES

INSTRUMENT SYSTEMS FORELECTRICAL AND ELECTRO-MAGNETIC EXPLORATION

MULTIFUNCTION RECEIVER: TheGDP-32II receiver performs broadbandsynchronous time- or frequency-domainmeasurements on both controlled source(i.e., signals generated by transmittingcurrent into grounded dipoles or wireloops) and on natural fields (MT/AMT).

TRANSMITTERS: ZONGE manufac-tures a complete series of transmitterswith power ratings ranging from milliwattsto 10s of kilowatts, and output currentsranging from 1 µA to 45 A. All transmit-ters can transmit either frequency do-main (100% duty cycle) or time domain(50%

Since its founding in 1972, Zonge Engi-neering & Research Organization(ZONGE) has specialized in the develop-ment and application of broadband elec-trical and electromagnetic methods forpetroleum and mineral exploration, geo-thermal prospecting, and engineeringsite characterization. ZONGE wasamong the first to recognize the potentialof the microprocessor-controlled receiverand, with the introduction of the GDP-12multifunction receiver in 1977, was thefirst to commercialize this new technol-ogy. The ZONGE GDP-32II receiversare arguably the most versatile electricaland EM receivers available in the world

today. These rugged one-man portable,multi-channel, battery-operated receiverscan perform the following measurementswith no change in either hardware orsoftware: resistivity-phase IP (RPIP);time domain IP (TDIP); complex resistiv-ity (CR); controlled-source AMT(CSAMT); time domain EM (TEM); andlow-frequency and audio frequencymagnetotellics (MT/AMT). ZONGE alsomanufactures a complete line of support-ing instruments and ancillary equipmentrequired in systems used for the acquisi-tion of most electrical resistivity and elec-tromagnetic survey data.

PRODUCT LINE

During the course of processing real-world electrical and EM field data over a25-year period, ZONGE has developed acomprehensive set of programs for theprocessing, display, and interpretation offield data for the many survey methodsthat ZONGE instrument systems rou-tinely perform. Key features of ZONGEsoftware are:

• data processing and display soft-ware for all survey types and optionsthat allow you to generate the resultsyou want.

• DatProWin, a Windows 95/NT basedprogram that integrates the editing,processing, and display functions thatheretofore were accomplished with

text-based editors and a series ofDOS based programs.

• modeling and interpretation pro-grams that use robust smooth-modelinversion.

The following basic software is fur-nished at no charge with purchase of aGDP-32II receiver:

• QC, averaging, and display programsfor CSAMT, Harmonic CSAMT, RPIP,TDIP, CR, and TEM

• DatProWin

• Utilities

The following software is available forpurchase:

• Modeling and interpretation programs

• Upgrades from DatPro3 toDatProWin.

• Additional licenses for DatPro,DatProWin, and modelingprograms.

PROCESSING ANDINTERPRETATION SOFTWARE

duty cycle) waveforms. These transmit-ters are suitable for surveys ranging fromlaboratory-scale (e.g., cores) to deepmining, geothermal, or petroleum explo-ration.

MAGNETIC SENSORS: The TEM,CSAMT, AMT, and MT methods requirethe measurement of one or more com-ponents of the magnetic field (or its timederivative) as a function of frequencyand/or time. ZONGE has designed sen-sitive permeable-core coils (inductionmagnetometers) specifically for makingthe required magnetic field measure-

ments associated with the aforemen-tioned EM methods. These rugged andextremely compact coils represent thestate-of-the-art in induction magnetom-eters for geophysical measurements ofcontrolled and natural magnetic field sig-nals.

ACCESSORY EQUIPMENT: ZONGEmanufactures or supplies a variety of ac-cessory equipment including wire reels,switches, multiplexers, and specialcables.

DATA PROCESSING AND INTERPRE-TATION SOFTWARE: To support its in-strument customers and its world-widefield operations, ZONGE has developedcomprehensive software for the process-ing, display, modeling, and interpretationof electrical and electromagnetic data.

3) DatPro is the name of a series of MS-DOS based data processingprograms that has been replaced by the Windows 95/NT based programDatPro Win

The ZONGE GDP-32II multifunction re-ceiver is the fourth generation GDP re-ceiver and it plays a pivotal role in theZONGE system of instrumentation. Thenew receiver is downward compatiblewith its predecessor, the GDP-32, retain-ing the same package design, analog

circuits, and timing circuits. Its new digi-tal control and front panel assembly fea-tures a QWERTY keypad and a high-contrast sun-light readable 1/2 VGAmonochrome LCD display both of whichare compatible with common operatingsystems such as MS-DOS and Windows95.

GDP-32II

MULTIFUNCTION RECEIVER

PERFORMANCE ADVANTAGESMULTIFUNCTION CAPABILITY: Thestandard GDP-32II has true multifunctionmeasurement capabilities permitting it toperform as a multi-channel time- or fre-quency-domain receiver for the measure-ment of both controlled-source and natu-ral electric and magnetic fields.

SYNCHRONOUS TIMING: An oven-sta-bilized precision quartz oscillator-drivenclock, standard with the GDP-32II re-ceiver, maintains a ultra-stable timingreference with typical drift rates of lessthan 5 µs/hr (~0.03 mr/hr phase drift at 1Hz). Optionally, the oscillator can be dis-ciplined with the Global Positioning Sys-

tem (GPS) to further reduce timing er-rors. An identical clock in a separatetransmitter controller (XMT-32) can besynchronized with one or more GDP re-ceivers and used to drive a transmitterthereby eliminating the need for hardwireconnections to provide phase reference.

MULTI-CHANNEL ACQUISITION: TheGDP-32II can acquire data from up to 16independent analog channels. Each in-put signal is preconditioned by a preci-sion low-noise gain and filtering circuit af-ter which it is sampled and converted todigital format by a dedicated 16-bit A/D.Analog signals are not multiplexed

Laboratory-System

NanoTEM System

Streaming Resistivity / IP-System

NanoTEM APPLICATIONS

• Waste SiteCharacterization

• Shallow GroundwaterExploration

• UXO-Detection• Engineering Site

Investigation• Acid Mine Drainage• Void Detection• Metal Detection• Underground Tank

Detection

LABORATORY APPLICATIONS

• Electrical Properties• Scale Modeling

STREAMING RESISTIVITY/IP APPLICATIONS

• River/Lake BottomSurveys

• Petroleum Exploration

KEY FEATURES• Rugged, one-man portable, and envi-

ronmentally sealed.

• 40 MHz 486DX MPU (Optional 75MHz and 100 MHz processors avail-able).

• PC-104 expansion buss permits the in-stallation of easily available OEMboard-level products.

• Ultra-stable quartz oscillator-based tim-ing reference (aging rate < 5x10-10/24hr) with optional GPS discipline whenbetter stability is required.

• Broadband TD or FD operation ( .001 -ƒ - 8192 Hz ).

• Multifunction capability (Resistiv-ity, TD/FD IP, CR, CSAMT, Har-monic Analysis CSAMT, MT/AMT,and TEM/NanoTEM. Other acqui-sition programs available.)

• High-capacity mass storage (> 1 GB)available as an option for waveform re-cording.

• Ethernet (10 BaseT) LAN interface fa-cilitates high-speed ( 0.5 to 1.2 MB/sec) data transfer.

through a single converter as is com-monly done in many receivers.

ON-LINE SOFTWARE FOR DATAQUALITY CONTROL: The programscontrolling the GDP-32II permit the op-erator to review the data either numeri-cally or graphically while in the field. Astandard error of the mean (SEM) is cal-

culated for every measurement. Appar-ent resistivity is calculated for commonlyused antenna arrays for each of the ac-quisition programs. Time domain tran-sient decay curves and frequency do-main spectra may be viewed graphically.Graphic displays of several repeatedmeasurements show error bars.

AMT/MT System

CSAMT-System

TEM-System

CSAMT APPLICATIONS

• Mining Exploration• Petroleum Exploration• In Situ Leaching• Heap Leach Monitoring• Geothermal Exploration• Groundwater Exploration

AMT/MT APPLICATIONS

• Mining Exploration• Petroleum Exploration• Geothermal Exploration

TEM APPLICATIONS

• Mining Exploration• Geothermal Exploration• Static Corrections

for MT/AMT

• Remote operation through modem ordirect wire serial port.

• Multi-channel operation (16 channelsmax) with dedicated A/D for each chan-nel.

• Precision internal calibration sourcewith supporting calibration software fa-cilitates data quality checks, and re-moval of system response.

• Automatic gain ranging, and SPbuckout.

ZONGE manufactures a complete line of transmitters for applications ranging fromthe laboratory to mining and geothermal exploration

TRANSMITTERS

MOTOR-GENERATOR DRIVEN TRANSMITTERS (GGT SERIES)

The GGT series transmitters provide abroad range of rated output power. Pri-mary power for these transmitters is 2083-phase 400 Hz Vac. Both the transmit-ter and the required motor-generator aresignificantly smaller and more portablethan they would otherwise be if poweredby 50/60Hz 3-phase AC power. Thehigher primary frequency (400 Hz) alsoresults in current waveforms that are freeof AC noise ripple below 2400 Hz. GGTseries transmitters include features im-portant for operational safety includingautomatic shutdown when load circuit isbroken and a two-step RESET-TRANS-MIT switch to prevent accidental trans-mission. A multifunction digital panelmeter measures output power, outputcurrent, internal temperature, and cur-rent shut-off time. Three GGT Transmit-ters with different output power ratingsare manufactured: GGT-3 (3 KVA); GGT-

10 (10 KVA); and GGT-30 (30 KVA). Mo-tor-generators with appropriate outputpower levels are available for each of theGGT transmitters.

KEY-FEATURES:• Dual-function resistivity or EM transmit-

ter (i.e., grounded dipole or loop anten-nas)

• Broadband frequency range (DC to 10kHz)

• Constant-current supply with regulationto ±0.2% at a maximum output voltageof 1000 Vdc

• Frequency or time domain operation

• Fast shutoff times (~10 µs into resistiveload; 125 µs into 300m x 300m loop)

• Automatic fault detection and shutdowncircuits

• Current shutoff time measurement (Im-portant for TEM)

Complex Resistivity (CR) System

Resistivity/IP System (Time Domain or Frequency Domain)

Electrical Resistance Tomography (ERT) System

GGT-30 GGT-10GGT-3

CR APPLICATIONS

• Mining Exploration• Petroleum Exploration• IP Source Determination

RPIP/TDIP APPLICATIONS

• Mining Exploration• Engineering Site

Investigation• Hazardous Waste Site

Characterization• Groundwater Exploration• Petroleum Exploration

ERT APPLICATIONS

• Plume Migration• In Situ Leaching• Heap Leach Monitoring• Secondary Recovery

(petroleum)• Site Remediation• Tank Monitoring

1) A version of the ZT-30 with primary DC power voltages as high as 400 Vdc is under development.

2) A 400 watt DC-DC power converter (DCPS400) with current-regulated output (400 VA output power) is available. When used as the source of primary power for theZT-30, the two units together constitute a 400 watt battery-powered current-regulated resistivity/IP transmitter suitable for small-scale precision resistivity/IP measure-ments. Where AC is available, the DCPS400 can be configured so that it will operate from a universal AC source (i.e., 85-264 VAC, 47-440 Hz)

ZONGE manufactures three transmittersthat use DC power (e.g., storage batter-ies) as the primary power source. Two ofthe transmitters (NT-20; ZT-30) were de-veloped specifically as TEM transmitters.A third transmitter, the LDT-10, is de-signed for small-scale resistivity/IP mea-surements in drill holes and on coresamples.

ZT-30 ZeroTEM TRANSMITTER: Oper-ating from a DC power source (24-120Vdc),1 the ZT-30 can switch currents ashigh as 30 A into inductive or resistiveloads. Two or more 12 Vdc automotivebatteries connected in series provide DCpower when the ZT-30 is used as a TEMtransmitter. The ZT-30 is also being usedas a low-power resistivity/IP transmittersfor applications where precision currentregulation is not required (e.g., time do-

main IP) or when the current waveformcan be directly measured (e.g., referenceIP, CR, ERT, etc).2 The ZT-30 transmit-ter is small and easily transportable byone person. It is most appropriate foruse in TEM surveys where the targets ofinterest are less than 500 m.

NT-20 NanoTEM TRANSMITTER: Whenequipped with optional NanoTEM analogacquisition cards, the GDP-32II can mea-sure TEM transients at time delays asshort as ~1 µs after current shutoff.When used together with a fast shutoffTEM transmitter, these early time TEMmeasurements provide information aboutthe subsurface for depths less than 100m. The NT-20 supplies up to 3 A intosmall loops (5-100 m) while achievingthe rapid current turnoff (e.g., 1.5 µs intoa 20 m loop) required for NanoTEMmeasurements. The NT-20 is a dualmode TEM transmitter. When operatingin its slow turnoff mode(ZeroTEM mode), it cansupply up to 20 A intolarger loops.

LDT-10 LABORATORY TRANSMITTER:The LDT-10 operates with12 Vdc power and, depend-ing on the load resistance,can provide precision cur-rent-regulated frequency do-main or time domain wave-forms with amplitudes rang-ing from 1 µA to 10 mA.The transmitter is ideal forresistivity/IP measurementson drill core and for use inconnection with drill holelogging.

BATTERY-POWERED TRANSMITTERS

ZONGE has adapted its instrument sys-tems to conduct electrical and EM sur-veys for a wide range of engineering, en-vironmental, and research applications. Ahallmark of the ZONGE GDP receiver, in-deed perhaps its most significant feature,is its multi-function capability. Whenpaired with an appropriate transmitter, the

A SINGLE RECEIVERHANDLES ROUTINEAND SPECIAL SURVEYS

receiver is applicable to a variety of sur-vey methods. Moreover, the functionalityof the GDP receiver is constantly beingexpanded with special purpose measur-ing software. Illustrated on succeedingpages are block diagrams showing GDP-32II instrument systems configured fordifferent types of electrical or EM sur-veys.

ZT-30

LDT-10

NT-20

NanoTEM System

Electrical ResistanceTomography (ERT) System

Regardless of the particular method em-ployed, electrical and EM surveys requireconsiderable accessory equipment to fa-cilitate efficient data production. ZONGEmanufactures a broad line of the acces-sories necessary to properly equip a fieldoperation. Many of these accessorieshave been developed as the result of 25years of accumulated field experience inapplying electrical and EM methods tomining, petroleum, geothermal, ground-water, and engineering problems, andthey are simply not available from anyother source. Accessories include:

WIRE REELS: Light-weight breast reels(manual) and heavy-duty power reels fortransmitter and receiver wire.

ANCILLARY EQUIPMENT: Resistor loadbanks, isolation amplifiers, electrodeswitch boxes and multiplexers (manual &computer controlled), active electrodeamplifiers.

ACCESSORIES MAGNETIC SENSORSWith the advent of high dynamic rangereceivers, such as the GDP-32II , the im-portance of high quality magnetic fieldsensors has increased. ZONGE manu-factures a complete range of inductioncoil based magnetic field detectors, eachtailored to the requirements of a particu-lar application. Low-noise, low-power,

and thermal stability are important de-sign objectives in magnetic sensors forgeophysical exploration. The ZONGEsensors meet these objectives. Themagnetic sensors we manufacture andtheir corresponding application are listedin the table:

MAGNETIC SENSORS

<_ <_

<_<_

<_<_

SENSOR APPLICATION FREQUENCY RANGE REMARKS

ANT-3 CSAMT/AMT 0.1 f 20 kHz H-field response; 100 mv/nT

ANT-4 MT 0.0005 f 1.5 kHz H-field response; 100 mv/nT

UO-4 CSAMT 1 f 20 kHz H-field response; 100 mv/nT

TEM-3 TEM f0 > 20 kHz dB/dt response

Ae=10,000 m2

Regardless of the particular method em-ployed, electrical and EM surveys requireconsiderable accessory equipment to fa-cilitate efficient data production. ZONGEmanufactures a broad line of the acces-sories necessary to properly equip a fieldoperation. Many of these accessorieshave been developed as the result of 25years of accumulated field experience inapplying electrical and EM methods tomining, petroleum, geothermal, ground-water, and engineering problems, andthey are simply not available from anyother source. Accessories include:

WIRE REELS: Light-weight breast reels(manual) and heavy-duty power reels fortransmitter and receiver wire.

ANCILLARY EQUIPMENT: Resistor loadbanks, isolation amplifiers, electrodeswitch boxes and multiplexers (manual &computer controlled), active electrodeamplifiers.

ACCESSORIES MAGNETIC SENSORSWith the advent of high dynamic rangereceivers, such as the GDP-32II , the im-portance of high quality magnetic fieldsensors has increased. ZONGE manu-factures a complete range of inductioncoil based magnetic field detectors, eachtailored to the requirements of a particu-lar application. Low-noise, low-power,

and thermal stability are important de-sign objectives in magnetic sensors forgeophysical exploration. The ZONGEsensors meet these objectives. Themagnetic sensors we manufacture andtheir corresponding application are listedin the table:

MAGNETIC SENSORS

<_ <_

<_<_

<_<_

SENSOR APPLICATION FREQUENCY RANGE REMARKS

ANT-3 CSAMT/AMT 0.1 f 20 kHz H-field response; 100 mv/nT

ANT-4 MT 0.0005 f 1.5 kHz H-field response; 100 mv/nT

UO-4 CSAMT 1 f 20 kHz H-field response; 100 mv/nT

TEM-3 TEM f0 > 20 kHz dB/dt response

Ae=10,000 m2

ZONGE manufactures three transmittersthat use DC power (e.g., storage batter-ies) as the primary power source. Two ofthe transmitters (NT-20; ZT-30) were de-veloped specifically as TEM transmitters.A third transmitter, the LDT-10, is de-signed for small-scale resistivity/IP mea-surements in drill holes and on coresamples.

ZT-30 ZeroTEM TRANSMITTER: Oper-ating from a DC power source (24-120Vdc),1 the ZT-30 can switch currents ashigh as 30 A into inductive or resistiveloads. Two or more 12 Vdc automotivebatteries connected in series provide DCpower when the ZT-30 is used as a TEMtransmitter. The ZT-30 is also being usedas a low-power resistivity/IP transmittersfor applications where precision currentregulation is not required (e.g., time do-

main IP) or when the current waveformcan be directly measured (e.g., referenceIP, CR, ERT, etc).2 The ZT-30 transmit-ter is small and easily transportable byone person. It is most appropriate foruse in TEM surveys where the targets ofinterest are less than 500 m.

NT-20 NanoTEM TRANSMITTER: Whenequipped with optional NanoTEM analogacquisition cards, the GDP-32II can mea-sure TEM transients at time delays asshort as ~1 µs after current shutoff.When used together with a fast shutoffTEM transmitter, these early time TEMmeasurements provide information aboutthe subsurface for depths less than 100m. The NT-20 supplies up to 3 A intosmall loops (5-100 m) while achievingthe rapid current turnoff (e.g., 1.5 µs intoa 20 m loop) required for NanoTEMmeasurements. The NT-20 is a dualmode TEM transmitter. When operatingin its slow turnoff mode(ZeroTEM mode), it cansupply up to 20 A intolarger loops.

LDT-10 LABORATORY TRANSMITTER:The LDT-10 operates with12 Vdc power and, depend-ing on the load resistance,can provide precision cur-rent-regulated frequency do-main or time domain wave-forms with amplitudes rang-ing from 1 µA to 10 mA.The transmitter is ideal forresistivity/IP measurementson drill core and for use inconnection with drill holelogging.

BATTERY-POWERED TRANSMITTERS

ZONGE has adapted its instrument sys-tems to conduct electrical and EM sur-veys for a wide range of engineering, en-vironmental, and research applications. Ahallmark of the ZONGE GDP receiver, in-deed perhaps its most significant feature,is its multi-function capability. Whenpaired with an appropriate transmitter, the

A SINGLE RECEIVERHANDLES ROUTINEAND SPECIAL SURVEYS

receiver is applicable to a variety of sur-vey methods. Moreover, the functionalityof the GDP receiver is constantly beingexpanded with special purpose measur-ing software. Illustrated on succeedingpages are block diagrams showing GDP-32II instrument systems configured fordifferent types of electrical or EM sur-veys.

ZT-30

LDT-10

NT-20

NanoTEM System

Electrical ResistanceTomography (ERT) System

ZONGE manufactures a complete line of transmitters for applications ranging fromthe laboratory to mining and geothermal exploration

TRANSMITTERS

MOTOR-GENERATOR DRIVEN TRANSMITTERS (GGT SERIES)

The GGT series transmitters provide abroad range of rated output power. Pri-mary power for these transmitters is 2083-phase 400 Hz Vac. Both the transmit-ter and the required motor-generator aresignificantly smaller and more portablethan they would otherwise be if poweredby 50/60Hz 3-phase AC power. Thehigher primary frequency (400 Hz) alsoresults in current waveforms that are freeof AC noise ripple below 2400 Hz. GGTseries transmitters include features im-portant for operational safety includingautomatic shutdown when load circuit isbroken and a two-step RESET-TRANS-MIT switch to prevent accidental trans-mission. A multifunction digital panelmeter measures output power, outputcurrent, internal temperature, and cur-rent shut-off time. Three GGT Transmit-ters with different output power ratingsare manufactured: GGT-3 (3 KVA); GGT-

10 (10 KVA); and GGT-30 (30 KVA). Mo-tor-generators with appropriate outputpower levels are available for each of theGGT transmitters.

KEY-FEATURES:• Dual-function resistivity or EM transmit-

ter (i.e., grounded dipole or loop anten-nas)

• Broadband frequency range (DC to 10kHz)

• Constant-current supply with regulationto ±0.2% at a maximum output voltageof 1000 Vdc

• Frequency or time domain operation

• Fast shutoff times (~10 µs into resistiveload; 125 µs into 300m x 300m loop)

• Automatic fault detection and shutdowncircuits

• Current shutoff time measurement (Im-portant for TEM)

Complex Resistivity (CR) System

Resistivity/IP System (Time Domain or Frequency Domain)

Electrical Resistance Tomography (ERT) System

GGT-30 GGT-10GGT-3

CR APPLICATIONS

• Mining Exploration• Petroleum Exploration• IP Source Determination

RPIP/TDIP APPLICATIONS

• Mining Exploration• Engineering Site

Investigation• Hazardous Waste Site

Characterization• Groundwater Exploration• Petroleum Exploration

ERT APPLICATIONS

• Plume Migration• In Situ Leaching• Heap Leach Monitoring• Secondary Recovery

(petroleum)• Site Remediation• Tank Monitoring

1) A version of the ZT-30 with primary DC power voltages as high as 400 Vdc is under development.

2) A 400 watt DC-DC power converter (DCPS400) with current-regulated output (400 VA output power) is available. When used as the source of primary power for theZT-30, the two units together constitute a 400 watt battery-powered current-regulated resistivity/IP transmitter suitable for small-scale precision resistivity/IP measure-ments. Where AC is available, the DCPS400 can be configured so that it will operate from a universal AC source (i.e., 85-264 VAC, 47-440 Hz)

KEY FEATURES• Rugged, one-man portable, and envi-

ronmentally sealed.

• 40 MHz 486DX MPU (Optional 75MHz and 100 MHz processors avail-able).

• PC-104 expansion buss permits the in-stallation of easily available OEMboard-level products.

• Ultra-stable quartz oscillator-based tim-ing reference (aging rate < 5x10-10/24hr) with optional GPS discipline whenbetter stability is required.

• Broadband TD or FD operation ( .001 -ƒ - 8192 Hz ).

• Multifunction capability (Resistiv-ity, TD/FD IP, CR, CSAMT, Har-monic Analysis CSAMT, MT/AMT,and TEM/NanoTEM. Other acqui-sition programs available.)

• High-capacity mass storage (> 1 GB)available as an option for waveform re-cording.

• Ethernet (10 BaseT) LAN interface fa-cilitates high-speed ( 0.5 to 1.2 MB/sec) data transfer.

through a single converter as is com-monly done in many receivers.

ON-LINE SOFTWARE FOR DATAQUALITY CONTROL: The programscontrolling the GDP-32II permit the op-erator to review the data either numeri-cally or graphically while in the field. Astandard error of the mean (SEM) is cal-

culated for every measurement. Appar-ent resistivity is calculated for commonlyused antenna arrays for each of the ac-quisition programs. Time domain tran-sient decay curves and frequency do-main spectra may be viewed graphically.Graphic displays of several repeatedmeasurements show error bars.

AMT/MT System

CSAMT-System

TEM-System

CSAMT APPLICATIONS

• Mining Exploration• Petroleum Exploration• In Situ Leaching• Heap Leach Monitoring• Geothermal Exploration• Groundwater Exploration

AMT/MT APPLICATIONS

• Mining Exploration• Petroleum Exploration• Geothermal Exploration

TEM APPLICATIONS

• Mining Exploration• Geothermal Exploration• Static Corrections

for MT/AMT

• Remote operation through modem ordirect wire serial port.

• Multi-channel operation (16 channelsmax) with dedicated A/D for each chan-nel.

• Precision internal calibration sourcewith supporting calibration software fa-cilitates data quality checks, and re-moval of system response.

• Automatic gain ranging, and SPbuckout.

The ZONGE GDP-32II multifunction re-ceiver is the fourth generation GDP re-ceiver and it plays a pivotal role in theZONGE system of instrumentation. Thenew receiver is downward compatiblewith its predecessor, the GDP-32, retain-ing the same package design, analog

circuits, and timing circuits. Its new digi-tal control and front panel assembly fea-tures a QWERTY keypad and a high-contrast sun-light readable 1/2 VGAmonochrome LCD display both of whichare compatible with common operatingsystems such as MS-DOS and Windows95.

GDP-32II

MULTIFUNCTION RECEIVER

PERFORMANCE ADVANTAGESMULTIFUNCTION CAPABILITY: Thestandard GDP-32II has true multifunctionmeasurement capabilities permitting it toperform as a multi-channel time- or fre-quency-domain receiver for the measure-ment of both controlled-source and natu-ral electric and magnetic fields.

SYNCHRONOUS TIMING: An oven-sta-bilized precision quartz oscillator-drivenclock, standard with the GDP-32II re-ceiver, maintains a ultra-stable timingreference with typical drift rates of lessthan 5 µs/hr (~0.03 mr/hr phase drift at 1Hz). Optionally, the oscillator can be dis-ciplined with the Global Positioning Sys-

tem (GPS) to further reduce timing er-rors. An identical clock in a separatetransmitter controller (XMT-32) can besynchronized with one or more GDP re-ceivers and used to drive a transmitterthereby eliminating the need for hardwireconnections to provide phase reference.

MULTI-CHANNEL ACQUISITION: TheGDP-32II can acquire data from up to 16independent analog channels. Each in-put signal is preconditioned by a preci-sion low-noise gain and filtering circuit af-ter which it is sampled and converted todigital format by a dedicated 16-bit A/D.Analog signals are not multiplexed

Laboratory-System

NanoTEM System

Streaming Resistivity / IP-System

NanoTEM APPLICATIONS

• Waste SiteCharacterization

• Shallow GroundwaterExploration

• UXO-Detection• Engineering Site

Investigation• Acid Mine Drainage• Void Detection• Metal Detection• Underground Tank

Detection

LABORATORY APPLICATIONS

• Electrical Properties• Scale Modeling

STREAMING RESISTIVITY/IP APPLICATIONS

• River/Lake BottomSurveys

• Petroleum Exploration

During the course of processing real-world electrical and EM field data over a25-year period, ZONGE has developed acomprehensive set of programs for theprocessing, display, and interpretation offield data for the many survey methodsthat ZONGE instrument systems rou-tinely perform. Key features of ZONGEsoftware are:

• data processing and display soft-ware for all survey types and optionsthat allow you to generate the resultsyou want.

• DatProWin, a Windows 95/NT basedprogram that integrates the editing,processing, and display functions thatheretofore were accomplished with

text-based editors and a series ofDOS based programs.

• modeling and interpretation pro-grams that use robust smooth-modelinversion.

The following basic software is fur-nished at no charge with purchase of aGDP-32II receiver:

• QC, averaging, and display programsfor CSAMT, Harmonic CSAMT, RPIP,TDIP, CR, and TEM

• DatProWin

• Utilities

The following software is available forpurchase:

• Modeling and interpretation programs

• Upgrades from DatPro3 toDatProWin.

• Additional licenses for DatPro,DatProWin, and modelingprograms.

PROCESSING ANDINTERPRETATION SOFTWARE

duty cycle) waveforms. These transmit-ters are suitable for surveys ranging fromlaboratory-scale (e.g., cores) to deepmining, geothermal, or petroleum explo-ration.

MAGNETIC SENSORS: The TEM,CSAMT, AMT, and MT methods requirethe measurement of one or more com-ponents of the magnetic field (or its timederivative) as a function of frequencyand/or time. ZONGE has designed sen-sitive permeable-core coils (inductionmagnetometers) specifically for makingthe required magnetic field measure-

ments associated with the aforemen-tioned EM methods. These rugged andextremely compact coils represent thestate-of-the-art in induction magnetom-eters for geophysical measurements ofcontrolled and natural magnetic field sig-nals.

ACCESSORY EQUIPMENT: ZONGEmanufactures or supplies a variety of ac-cessory equipment including wire reels,switches, multiplexers, and specialcables.

DATA PROCESSING AND INTERPRE-TATION SOFTWARE: To support its in-strument customers and its world-widefield operations, ZONGE has developedcomprehensive software for the process-ing, display, modeling, and interpretationof electrical and electromagnetic data.

3) DatPro is the name of a series of MS-DOS based data processingprograms that has been replaced by the Windows 95/NT based programDatPro Win

ZONGE provides a broad range of ser-vices beyond the manufacture of instru-ments. These include:

FIELD SERVICES: The company wasfounded as a geophysical service com-pany specializing in electrical and elec-tromagnetic surveys for the mining indus-try. Field services and data interpreta-tion remain an essential part of thecompany’s business.

TRAINING: Training courses in all as-pects of field data acquisition, data pro-cessing, and interpretation are availableat our Tucson office or at the customer’ssite.

CONSULTING: With 26-years of experi-ence in providing field services and data

interpretation of electrical and EM datafor mining, petroleum, and engineeringapplications, ZONGE can provide con-sulting services relating to developmentand conduct of exploration or site char-acterization programs.

PETROPHYSICS LABORATORY:ZONGE maintains a small petrophysicslaboratory for measuring electrical andmagnetic properties of cores and grabsamples. Physical properties routinelymeasured in our laboratory include: bulkresistivity/IP (frequency domain or timedomain), complex resistivity, magneticsusceptibility, remnant magnetism, wet/dry bulk density and porosity.

SERVICES

INSTRUMENT SYSTEMS FORELECTRICAL AND ELECTRO-MAGNETIC EXPLORATION

MULTIFUNCTION RECEIVER: TheGDP-32II receiver performs broadbandsynchronous time- or frequency-domainmeasurements on both controlled source(i.e., signals generated by transmittingcurrent into grounded dipoles or wireloops) and on natural fields (MT/AMT).

TRANSMITTERS: ZONGE manufac-tures a complete series of transmitterswith power ratings ranging from milliwattsto 10s of kilowatts, and output currentsranging from 1 µA to 45 A. All transmit-ters can transmit either frequency do-main (100% duty cycle) or time domain(50%

Since its founding in 1972, Zonge Engi-neering & Research Organization(ZONGE) has specialized in the develop-ment and application of broadband elec-trical and electromagnetic methods forpetroleum and mineral exploration, geo-thermal prospecting, and engineeringsite characterization. ZONGE wasamong the first to recognize the potentialof the microprocessor-controlled receiverand, with the introduction of the GDP-12multifunction receiver in 1977, was thefirst to commercialize this new technol-ogy. The ZONGE GDP-32II receiversare arguably the most versatile electricaland EM receivers available in the world

today. These rugged one-man portable,multi-channel, battery-operated receiverscan perform the following measurementswith no change in either hardware orsoftware: resistivity-phase IP (RPIP);time domain IP (TDIP); complex resistiv-ity (CR); controlled-source AMT(CSAMT); time domain EM (TEM); andlow-frequency and audio frequencymagnetotellics (MT/AMT). ZONGE alsomanufactures a complete line of support-ing instruments and ancillary equipmentrequired in systems used for the acquisi-tion of most electrical resistivity and elec-tromagnetic survey data.

PRODUCT LINE

INSTRUMENT SYSTEMSFOR ELECTRICAL ANDELECTROMAGNETICEXPLORATION

For additional information about specific instruments, aboutsystems for other application, or about the other productsand services of Zonge Engineering and Research Organiza-tion, please contact our office in Tucson, AZ or visit our website http://www.zonge.com

3322 EAST FORT LOWELL ROADTUCSON, ARIZONA 85716 USATOLL-FREE: 1 (800) 523-9913TEL: 1 (520) 327-5501FAX: 1 (520) 325-1588E-MAIL: zonge@zonge.com

ZONGE ENGINEERING& RESEARCH ORGANIZATION, INC.

4929 PALO VERDE DRIVEFAIRBANKS, ALASKA 99709 USATEL: 1 (907) 474-3679FAX: 1 (907) 474-3684E-MAIL:zongeak@polarnet.com

c/o ALASKA EARTH SCIENCES11341 OLIVE LANEANCHORAGE, ALASKA 99515TEL: 1 (907) 522-4664FAX: 1 (907) 349-3557E-MAIL:zong e@alaska.net

924 GREG STREETSPARKS, NEVADA 89431 USATEL: 1 (702) 355-7707FAX: 1 (702) 355-9144E-MAIL: zongenv@worldnet.att.net

ZONGE GEOSCIENCES, INC.

98 FREDERICK STREETWELLAND, SOUTH AUSTRALIA 5007TEL: (61) 8-8340-4308FAX: (61) 8-8340-4309E-MAIL: zong e@ozemail.com.au

ZONGE ENGINEERING & RESEARCHORGANIZATION (AUSTRALIA), INC.

EDUARDO ORCHARD 1351ANTOFAGASTATEL: (56) 55-268096FAX: (56) 55-259167E-MAIL: zonge@entelc hile.net

ZONGE INGENIERIA y GEOFISICA(CHILE) S.A.

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ZONGE ENGINEERING &RESEARCH ORGANIZATION, INC.