Airborne Geophysics


Dr.Ajay Manglik, Chief Scientist & Divisional Head Project Leader: MLP-6107-28(AM)

Project Title: Heliborne Geophysical Surveys over parts of Singhbhum Shear zone, Chhattisgarh, Kaladigi & Bhima Basins: Uranium Exploration Studies sponsored by AMD. Project No. : MLP-6107-28(AM)

Trans Chhattisgarh aeromagnetic lineaments running over a length of about 400 km from Deccan traps in the west till easternghat mobile belt in the east across different geological terrains were studied in detail in the light of very recent high resolution multi-parameter heliborne data. These lineaments were found to be associated with block faulting within the mesoproterozoic Singhora proto basin and their post depositional reactivation was inferred from the TDEM data inversion. This study may play a major role in understanding the regional tectonic setup, its implication in basin development and their role in the occurrence of unconformity related uranium mineralization in the basin.

Flight line path map of Sing hora Basin, Chhattisgarh

Staff

Dr.Ajay Manglik

Chief Scientist &Project Leader

Sri.R.RajKumar

Sr.Scientist,Activity Incharge

Dr.M.P.Lakshmi

Sr.Scientist

Sri.R.K.Kishore

Scientist

Sri.N.Srikanth

Scientist

Sr.G.Ramachandra Rao

Sr.Technician (1)

S.Parveen Begum

Sr.Technical Assistant

Sri.D.Praveen

Technical Officer

Sri.V.Pradeep Kumar

Technical Assistant

Sri.D.Seshu

Technical Assistant

S.Srinivasa Rao

Lab Assistant

Rock Mechanics:

Project Title: Petro-physical properties of the Deccan basalts and the underlying Mesozoic sedimentary rocks for geophysical modeling in hydrocarbon exploration.

Modelling of an impact cratering process requires a precise understanding of physics of the impact event. One of the main product of the impact cratering event is the ejecta blanket, which consists of angular fragments of the target materials. The larger size fractions of the ejecta are essentially produced by spall mechanism. Quantification of the spall layer needs the knowledge of petrophysical properties (density, P- and S-wave velocity, Poisson's ratio, uniaxial compressive strength, and Young's/bulk/shear modulus) of the target materials. In India, Lonar crater is located in the Deccan basalt province near Aurangabad; it is one of the rarest impact crater that formed in basalt and therefore is a terrestrial analog of km-scale simple craters on Mars and Moon. In order to understand the spallation processes in the crater, we measured the petrophysical properties of four types (massive, vesicular, amygdaloidal basalt and redbole) of ejecta fragments. The sample locations and relationships between these properties are shown in Figure 13. Using these parameters and the theoretical spallation model of Melosh (1984), we calculated the thickness of near surface zone (ZP) and spall layer (ZS). As predicted by the spallation model, ZP increase radially from the impact point. It is ~5.5 m at 165 m from the impact site, but gradually increases to 53 m near the crater rim (940 m from the impact point).
Staff

Name Designation

Rajeev Menon

Sr.Pr.Scientist

P.Senthil Kumar

Pr.Scientist

K.J.P.Lakshmi

Sr.Scientist

S.Ravinder

Technical Assistant

A.Sham

Lab Assistant

Mineral & Engineering &Air Borne Geophysics