Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Academia Brasileira de Ciências
2016
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=32744812007 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- Integrated evaluation of the geology, aerogammaspectrometry and aeromagnetometry of the Sul-Riograndense Shield, southernmost Brazil LÉO AFRANEO HARTMANN WILLIAM R. LOPES JAIRO F. SAVIAN Multidisciplinaria (Ciencias Naturales y Exactas) Sul Aeromagnetometry Riograndense Shield magnetic provinces aerogammaspectrometry An integrated evaluation of geology, aerogammaspectrometry and aeromagnetometry of the Sul-Riogran- dense Shield is permitted by the advanced stage of understanding of the geology and geochronology of the southern Brazilian Shield and a 2010 airborne geophysical survey. Gamma rays are registered from the rocks near the surface and thus describe the distribution of major units in the shield, such as the Pelotas batholith, the juvenile São Gabriel terrane, the granulite-amphibolite facies Taquarembó terrane and the numerous granite intrusions in the foreland. Major structures are also observed, e.g., the Dorsal de Canguçu shear. Magnetic signals register near surface crustal compositions (analytic signal) and total crust composition (total magnetic signal), so their variation as measured indicates either shallow or whole crustal structures. The Caçapava shear is outstanding on the images as is the magnetic low along the N-S central portion of the shield. These integrated observations lead to the deepening of the understanding of the largest and even detailed structures of the Sul-Riograndense Shield, some to be correlated to fi eld geology in future studies. Most signi fi cant is the presence of different provinces and their limits depending on the method used for data acquisition – geology, aerogammaspectrometry or aeromagnetometry. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32744812007 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.88