Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The Itajai foreland basin: a tectono-sedimentary record of the Ediacaran period, Southern Brazil

Full text
Author(s):
Basei, M. A. S. [1] ; Drukas, C. O. [2] ; Nutman, A. P. [3] ; Wemmer, K. [4] ; Dunyi, L. [5] ; Santos, P. R. [6] ; Passarelli, C. R. [7] ; Campos Neto, M. C. [8] ; Siga, Jr., O. ; Osako, L. [10]
Total Authors: 10
Affiliation:
[1] Univ Sao Paulo
[2] Univ Sao Paulo
[3] Univ Wollongong. Sch Earth & Environm Sci
[4] Univ Gottingen. Gottingen
[5] Chinese Acad Sci. Beijing SHRIMP Ctr
[6] Univ Sao Paulo
[7] Univ Sao Paulo
[8] Univ Sao Paulo
[10] UFC. Inst Geosci
Total Affiliations: 10
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF EARTH SCIENCES; v. 100, n. 2-3, p. 543-569, APR 2011.
Web of Science Citations: 2
Abstract

The Itajai Basin located in the southern border of the Luis Alves Microplate is considered as a peripheral foreland basin related to the Dom Feliciano Belt. It presents an excellent record of the Ediacaran period, and its upper parts display the best Brazilian example of Precambrian turbiditic deposits. The basal succession of Itajai Group is represented by sandstones and conglomerates (BaA(0) Formation) deposited in alluvial and deltaic-fan systems. The marine upper sequences correspond to the Ribeiro Carvalho (channelized and non-channelized proximal silty-argillaceous rhythmic turbidites), Ribeiro Neisse (arkosic sandstones and siltites), and Ribeiro do Bode (distal silty turbidites) formations. The ApiA(0)na Formation felsic volcanic rocks crosscut the sedimentary succession. The Cambrian Subida leucosyenogranite represents the last felsic magmatic activity to affect the Itajai Basin. The Brusque Group and the Florianpolis Batholith are proposed as source areas for the sediments of the upper sequence. For the lower continental units the source areas are the Santa Catarina, So Miguel and CamboriA(0) complexes. The lack of any oceanic crust in the Itajai Basin suggests that the marine units were deposited in a restricted, internal sea. The sedimentation started around 600 Ma and ended before 560 Ma as indicated by the emplacement of rhyolitic domes. The Itajai Basin is temporally and tectonically correlated with the Camaqu Basin in Rio Grande do Sul and the Arroyo del Soldado/Piriapolis Basin in Uruguay. It also has several tectono-sedimentary characteristics in common with the African-equivalent Nama Basin. (AU)

FAPESP's process: 05/58688-1 - South America in the context of supercontinents: fusion and fission
Grantee:Miguel Angelo Stipp Basei
Support type: Research Projects - Thematic Grants