Blsp02: Projeto De Estudo Sismológico Da Crosta E Manto Superior No Brasil

The recent Brazilian Lithosphere Seismic Project<br>(BLSP02) is studying the crustal and upper mantle structure<br>in Brazil by operating broadband seismic stations in<br>areas not covered in previous studies, specially in Northern<br>and NE Brazil. Teleseismic P waves are being used<br>to investigate crustal structure with receiver functions, and<br>surface waves are being used in tomographic mapping of<br>the lithosphere. As an example, the crustal thickness<br>beneath the Teresina station is shown to be 40 km.<br>Preliminary results of joint inversion of Rayleigh wave<br>group velocities and waveforms reveal new features: thick<br>lithosphere of the SE part of the Amazon craton, and<br>upper mantle low velocity anomalies beneath the Pantanal<br>Basin. Regional and local seismicity are also studied<br>with the new stations. This is a multi-institutional project<br>with collaboration from universities (UnB, UFRN, UFMS,<br>UFRA and IPT) and logistical support from several<br>companies (CPRM, Anglo-Gold, CVRD, De Beers,<br>RTDM, Embasa, and Alta Resolução).