GEOPHYSICAL STUDIES :
GSI has an experience of five decades in gravity, magnetic, IP-Resistivity, electromagnetic shallow seismic and bore-hole logging for applications to :
Mineral Exploration: Search for minerals, identification of sub-surface structures.
Study on urban development: Search for ground water detection of saline water, sub-surface maps for underground terrains, sewerage and town planning. Identification of waste disposal areas.
Studies in Environment: Glacial mass balance, Archaeology, Earthquake precursor
Aspects and Ecology and preventives against natural hazards, land subsidence and void identification.
Has an array of geophysical survey equipment and experienced professionals in all the six regional centres, head by a DDG / DIC Geophysics.
Its role in mineral exploration in becoming increasingly important. Investigation has been almost completed in most of the exposed or near surface deposits.
EQUIPMENT :
Magneto Telluric SAMTEC 2 (BRGM), VLF (BRGM)
Gravimeter — CG2 Scintrex, SODIN;
Micro gravimeter — La Coste
I.P. Unit (Time Domain) — 3 kW TSQ 3(Scintrex)/IPR IOA
I.P. Unit (Frequency Mode) — IPRF 2 (Receiver) Scintrex
Spectral I.P. MKIV (Huntec)
E.M. Unit — VHEM (Mc Phar), TURAM SE 77 F(Scintrex)
Magnetometer — MF2 (analogue), MFD4 (Digital)
Proton Precession Magnetometer MP2
Resistivity — RDC 10, (Scintrex), RV2(Phoenix)
Shallow Seismic — Huntec.
Seismic — SIE unit, (Refraction) DFS
High Resolution seismic survey — Minisosie (Input Output Corpn)
MEQ PS-2
Logger OYO (Japan), Pro Logger (RG,UK)
New Acquisitions :
Over a dozen Micro processor based Gravimeters
10 KW IP / Deep Resistivity Unit
Services available
(i) Gravity Survey (ii) Magnetic Survey (iii) EM Survey (iv) IP Survey (v) Resistivity Survey (vi) Borehole Logging (vi) Sesmic Survey
Contact :- Dy. DG, CGD, CHQ,,27, J.N.Road,
Calcutta 700 016.
Send mail to Dy. Director General,Geophysics for more information.
Last modified: June 20, 2002