Geometry and structural control of gold vein mineralizations in the Serido Belt, northeastern Brazil

Araújo, M. N. C., Alves da Silva, F. C., Jardim de Sá, E. F. and Holcombe, R. J. (2002) Geometry and structural control of gold vein mineralizations in the Serido Belt, northeastern Brazil. Journal of South American Earth Sciences, 15 3: 337-348. doi:10.1016/S0895-9811(02)00040-8


Author Araújo, M. N. C.
Alves da Silva, F. C.
Jardim de Sá, E. F.
Holcombe, R. J.
Title Geometry and structural control of gold vein mineralizations in the Serido Belt, northeastern Brazil
Formatted title
Geometry and structural control of gold vein mineralizations in the Seridó Belt, northeastern Brazil
Journal name Journal of South American Earth Sciences   Check publisher's open access policy
ISSN 0895-9811
1873-0647
Publication date 2002-07
Sub-type Article (original research)
DOI 10.1016/S0895-9811(02)00040-8
Volume 15
Issue 3
Start page 337
End page 348
Total pages 12
Editor James N. Kellogg
Place of publication Oxford, U.K
Publisher Pergamon
Collection year 2002
Language eng
Subject C1
780104 Earth sciences
260107 Structural Geology
0403 Geology
0404 Geophysics
Formatted abstract
Gold mineralization in the Seridó Belt (SB) generally has been associated with Neoproterozoic Brasiliano strike-slip shear zones (D3 event). The study of gold occurrence in the central and western SB has shown that the situation is much more complex.

In the micaschists of the central SB, the relationship among the Brasiliano strike-slip structures (D3), especially of a late retrometamorphic stage and gold mineralization, is evident. However, the investigation of two occurrences in the western domain of the Belt highlights the importance of earlier structures (D2) in controlling the geometry of the ore bodies.

The role played by the D3 event in the structural control of the gold mineralization is twofold. In the central SB, the mineral occurrences are synchronous and essentially controlled by the steep-dipping D3 structures. In the western domain, the earlier S2 foliation is preserved more in its original flat-lying attitude; this planar heterogeneity was reactivated during D3 and used as a site for gold precipitation.
© 2002 Elsevier Science B.V.. All rights reserved.
Keyword Serido Belt
Seridó Belt
Gold mineralizations
Quartz veins
Shear zones
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
School of Physical Sciences Publications
 
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Created: Tue, 14 Aug 2007, 17:07:33 EST