Differential Hydromagnetic and Surface Gravimetric Observations

Gravimetric survey is carried out in conjunction with seismic surveys with sea waves up to 4 points with an error of + 0.3-0.4 mGal for regional work and + 0‚1-0‚2 mGal for detailed.

Equipment

• Gravimeters "Chekan-Am", "Chekan-Am" (model "Shelf-E") production: Russia (JSC "Concern" Central Research Institute "Elektropribor")
• MEASUREMENT RANGE LESS THAN 10 GAL
• LIMITS OF ALLOWED ABSOLUTE ERROR ± 0.3-0.8 MGAL
• SENSITIVITY (DIVISION PRICE) 0.01 MGAL
• CONSTANT TIME OF GRAVIMETROT from 35 to 100 C
• Zero-point offset speed is less than 2 mGal / sut
• SeaSPY2 magnetometers, production: Canada (Marine Magnetics)
• ABSOLUTE ACCURACY 0.1 NTL
• SENSOR SENSITIVITY 0.01 NTL
• COUNTER SENSITIVITY .001 NTL
• MEASUREMENT RANGE FROM 18,000 NTL TO 120,000 NTL
• ALLOWED DEVIATION OF A GRADIENT MORE THAN 10,000 NTL / M

Using modern techniques and this equipment allows you to perform large-scale high-precision gravimetric and magnetometric surveys, as well as regional studies in conjunction with seismic surveys. The accuracy of magnetometric surveys, according to a regular network of observations, is ± 0.5-2 nT, in combination with seismic exploration - ± 3-5 nT. Gravimetric surveys in combination with seismic surveys are carried out with sea waves up to 4 points, with an accuracy of ± 0.3-0.4 mGal, and with detailed work ± 0.1-0.2 mGal.