Laboratories

 

Gravimetry and Geomagnetism 

Acquires, processes and interprets ground-based gravimetric, conventional marine, satellite altimetry and aero-surveying (gravimetric and magnetic) data. It also develops methodologies for processing and modeling potential data in various computational environments. One of the main objective of this lab is the modeling of regional and local tectonic structures, integrating with magnetic data. It has Gravity meters, precision GPS.

Phone: (11)3091-2763 and (11)3091-476


Geophysics of Lithosphere:

Performs field work performing gravimetric and tidal gravimetric measures in local and regional scales. Researchers at this lab performs data integration of geophysical and geochemical processes for the study of composition, structure and dynamics of South American plate. The instruments used by research group listed are mainly gravimeters, GPS and magnetometers. Aeromagnetic and gamma-spectrometric data (obtained through CPRM and other sources), satellite (directly from NASA through INPE), borehole samples and geophysical profiles from boreholes, geochemical and isotopic data (analyzed in laboratories of domestic and foreign institutions) are integrated with field data raised by researchers of the lab.


Nuclear Geophysics:

Natural and artificial radioactive elements are analyzed at environmental levels in different geological arrays such as rocks, soils, sediments, water, minerals, etc. For Gamma Spectrometry measurements, the laboratory has NaI (Tl) detectors and a 70% high resolution high purity germanium detector, which is being used mainly for the investigation of radioactive imbalance between members of the natural series of 238U and 232Th. For Gamma Spectrometry in the field research the lab has NaI (Tl) detectors for concentration of U, Th and K concentrations in situ.


Geochemistry:

It has the necessary infrastructure to perform simple qualitative and quantitative chemical analyzes on geological materials, such as rocks, soils, sediments, minerals and water. This infrastructure includes complete gas exhaust system, a complete gamma spectrometry system for measurements of induced activity (neutron activation), glassware, heating plates, digital analytical balance, distillers and water deionizers. Determinations of trace element concentrations (rare earths, Ta, Hf, Ba, Rb, Cs, Sc, Co etc.) are carried out using the neutron activation technique. These analyzes are carried out in collaboration with the Nuclear and Energy Research Institute-CNEN / SP, through an agreement between IAG and IPEN.


Applied Geophysics:

Research group developing theoretical and applied studies covering broad aspects on geophysical techniques applied to mineral exploration, hydrogeological investigation, mapping of interferences in subsoil and site characterization for environmental, geotechnical and archeological problems. The laboratory has a set of geophysical equipments to develop a variety of field work, such as Iris Syscal R2 Resistivity Meter; AGI SuperSting Resistivity Meter; Time Domain IP System Iris Elrec Pro + VIP 5000; Geonics TDEM-Time Domain Electromagnetic System with PROTEM-D Receiver + TEM57-MK2 and TEM47 Transmitters; Geonics FDEM-Frequency Domain Electromagnetic Systems EM-34 and EM-38; GSSI GPR-Ground Penetrating Radar Systems SIR-3000 and SIR-4000 with 20-80MHz antennas MLF-Multi Low Frequency and 70MHz, 100MHz, 200MHz, 270MHz, 400MHz e 900MHz antennas; GSSI GPR System DF-Dual Frequency with 300/800MHz antennas; GSSI GPR System StructureScan Mini of 2,6GHz; Geometrics Geode Seismograph with 96 channels; Oyo Seismograph with 24 channels; GEM GSM40 Magnetometer/Gradiometer; Geoscan FS-40 Magnetometer/Gradiometer; Robertson Geolloging Micrologger with dual induction probe. The laboratory has the support of two technicians and an off-road vehicle for field work.

Phone: (11) 3091-2765


Paleomagnetism and Rock Magnetism:

It develops research related to global and regional tectonics, geomagnetism as well as several applications of rock magnetism. For measurements of magnetic remanence of rocks, there are five rock magnetometers being two automatic (model JR6A from AGICO), a four-position Molspin and two superconducting rock magnetometers from 2G Enterprises, one with the option of measurements of up to 8 discrete samples or a continuous sample of up to 1.5 meters (Long Core system) and another for measurements of 100 discrete samples automatically (RAPID system), the last two magnetometers are systems that have coupled susceptibilimeter and alternating field demagnetizers, inducers of isothermal and antihysteresis remanence. For demagnetizing treatments there are two demagnetizers for alternating magnetic fields, one being Molspin and AGICO; (LDA-3A), has the option of an antisectic magnetiser (AMU-1A) and three thermal demagnetizers from ASC Scientific, one of the TD48 model and two of the TD48SC model (including inductive coil). For the analysis of the magnetic properties of the rocks, a Princeton vibrating sample magnetometer (model PMM MicroMag 3900 Series AGM / VSM) is used to perform hysteresis curves, Magnetic Measurements (MMPM-10) pulse magnetizers for induction of isothermal magnetization and three (Model MS2), and two AGICO susceptibility sensors, one with three frequency options and anisotropy susceptibility measurement (MKF1 - FA) and the other with measurement options with variation of Curie temperatures and low temperature transitions and anisotropy measurements (model KLY4S, CS3 and CSL). The laboratory has two fully shielded rooms to perform measurements of magnetic remanence and demagnetization treatments in rock samples. It has the support of an engineer and two physicists.

Phone: (11)3091-2755.


Seismology:


The Seismology Center operates seismographic networks in various parts of Brazil to perform seismicity, structural and seismotectonic studies at local and continental scales. The Seismology Center has a set of portable seismographs for temporary installation in areas with seismicity outbreak, as well as operates 25 stations as part of the Brazilian Seismograph Network (RSBR) and a Geoscope Program station (in Sorocaba, SP). Our Seismology Center processes data from all RSBR and many global stations in real time, determining epicenters and magnitudes for earthquakes mainly in Brazil and South America. This work is performed using the SeisComp3 software that is in constant development by the world community and that forms the basic tool that we use for our operation. Both earthquake catalogs and the waveform data are available to the public at the Seismology Center portal who keeps more than 5 TB of data and a catalog with over 1,500 Brazilian earthquakes. The methods constantly used in our research include receiver functions for P and S waves, travel time tomography, full waveform tomography and anisotropy with SKS waves. In addition we have extensive experience in absolute and relative hypocentral location as well as studies of seismic source and focal mechanisms. The Seismology Center staff comprises two lecturers and five technicians, besides two fellow technicians supported by the RSBR project.

Phone. (11)3091-4766 / (11)3091-4773

Web:  http://www.moho.iag.usp.br / http://www.sismo.iag.usp.br


Tectonophysics:

The Tectonophysics laboratory develops activities with the objective of studying the internal dynamics of the planet and its implications on the evolution of the earth's surface through numerical simulations at different scales of time and space as well as investigating the composition and structure of the lithosphere of the South American Plate using geopotential data, electromagnetic deep soundings, and other geophysical and geological data. The laboratory owns a cluster of computers, broadband magnetotelluric systems and accessories required for fieldworks, including batteries, electric cables, laptops, and GPS.

Phone: (11)3091-2776


Preparation of samples and Lamination:

Intended geological samples preparation for different  studies, mainly geochemical and paleomagnetics, as well as production of polished sections and  thin plate for optical microscopy. In addition to the equipment needed for cutting and  spraying (agate windmills and tungsten carbide) samples, there is also a magnetic separator  Frantz type used for phase separation of minerals present in rocks.

Phone: (11)3091-2752


Optical Microscopy

Has the necessary  infrastructure to identify  and study mineral phases present in rocks, including opaque minerals analysis using the  reflected light microscope.