Main directions / Development of technologies and hardware / Remote sensing
Sevmorgeo performs remote sensing with the help of the hardware system RIFT 3 (AMK- Apparatus Methodological Complex).
AMK Rift 3 is designated to:
Perfom deep water geological prospecting during exploration and evaluation stages.
License № Б-187694 dated 30.09.96
AMK Rift 3 ensures profile electrical survey by natural field techniques (EP), vertical electric sounding (VES) as well as geochemical and geophysical surveys with measurement of hydrogen indicatiors (pH), sulfur (pS), sodium (pNa), reductive-oxidative potential (Eh).
AMK Rift 3 is used in two modifications (potentiometric measurements or VES) in accordance with the set geological tasks.
AMK Rift 3 can be used at the following work stages:
Major tasks solved with the help of the AMK:
During the exploration stage:
- Identification of zones with bad values of hydrochemical parameters caused by intensive hydrothermal activity (pH, pS, pNa, Eh) and directly by ore appearance in deep water (natural electrical field);
- Localization of deep water ore bodies including relics.
During the exploration and evaluation stage:
- Mapping of ore body boundaries and identification of body thickness using the VES technique.
The AMK Rift 3 is a towing deep-water telemetric system working in the towing mode at a permanent depth or flowing underwater topography.
AMK is a module-based system; each module is a complete system designed to carry out a certain set of functions. Module sets can be different depending on survey specifics.
|
№ |
Module |
Function |
Comments |
|
1 |
Control and recording module (on-board) |
Importation and recording of data from the deep-water part of the complex, relay of commands |
Display of measurement and control data; Relay of commands; data recording. |
|
2 |
Power module (on-board) |
Power supply to the deep-water part of the complex |
Input voltage and frequency: U=115V±10%; F=400Hz Output voltage:100 1000V |
|
3 |
Central hardware module |
Importation and relay of data from measurement modules along cable. Reception of commands from the on-board module. |
Compatible with the cable KGP (КГП)-1-15, of up to 10000 m long. Simultaneous relay of commands and data importation |
|
Measurement modules |
Measured parameter |
Range |
Error |
||
|
4 |
Potential measurement module |
Natural electric field (horizontal and vertical components), electro chemical potentials |
ЕП рН Eh pS pNa |
±50 mV 500 mB 500 mB 500 mB 500 mB |
0.1% 0.5% 0.5% 0.5% 0.5% |
|
5 |
Module VE 3 with towed с bottom multi-differential installation |
Vertical electric sensing |
Voltage |
30mV ¸500mV |
0.1% |
|
Current from generator line |
1 А |
|
|||
|
6 |
Module for echosounding and pressure measurement |
Measuring of towing depth and distance between the installation and the bottom |
Pressure |
0¸60 MPa |
0.5% |
|
Distance |
10¸200 m |
0.2 m |
|||
|
7 |
Deep-sea navigation module |
Determination of position in the system of bottom beacons or in the “short” base |
Distance |
0.3¸6 km |
12 m |
|
8 |
Towed rack for the system |
Placement of modules |
Total weight |
350 kg |
|
|
Dimensions |
1800х940х850 |
||||
Sea depth for work performance – up to 5000 m, vessel speed is 1 knot.
Data control correlation:
- During the exploration survey stage – with the SPN Sigma in the “short” wave mode (in the course of areal profile surveys) or in the system of bottom beacon-responents;
- In the course of GPS ore bodies’ localization;
