Abstract
The C1-Santaluz gold deposit is located in the Itapicuru greenstone belt in Bahia State, Brazil. Metavolcanic and metasedimentary rocks dominate at the base and top, respectively. The ore minerals related to the auriferous mineralization are pyrite, arsenopyrite, sphalerite, chalcopyrite and stibnite. Arsenopyrite is related to, and associated with the presence of gold in quartz veins, a feature which is detected by scanning electron microscope analyses. The deposit is structurally complex, with tree deformational phases being recognized: D n-1 , D n , and D n+1 . Phases D n-1 and D n have a direct relation to the mineralization, and mineralized quartz veins are parallel to the S n foliation (S 0 //S n-1 //S n ). The intersection between the S 0 //S n-1 bedding and the Sn foliation generates an intersection lineation parallel to the D n fold axis, plunging to the NW, which has favored an increase in the volume of mineralized bodies.
Highlights
Structural controls play a major role in gold deposits, and understanding the different structures and their relationships with one another is fundamental to the interpretation of the gold system.According to Groves et al (2003), there are important factors regarding orogenic gold deposits, such as the source of ore fluids and metals, tectonic setting, age of mineralization of some provinces, features of hydrothermal alteration and depositional mechanisms specific to gold
The volcanic and metasedimentary domains, and the intermediate intrusive lithotypes are recognized in the study area
It is difficult to separate the sub-units of the Rio Itapicuru greenstone belt because of the common alternation between lenses and apophyses of each domain into one another
Summary
According to Groves et al (2003), there are important factors regarding orogenic gold deposits (definition after Groves et al 1998), such as the source of ore fluids and metals, tectonic setting, age of mineralization of some provinces, features of hydrothermal alteration and depositional mechanisms specific to gold. These factors are not always well known during the exploration phase and may be compared to those from important world-class deposits already documented, leading to a better understanding of their characteristics. The main orogenic gold deposits are strongly associated with deformed metamorphic terranes, and gold is commonly related to greenschist facies rocks (Groves et al 1998, 2000, 2003, Hagemann & Cassidy 2000, Goldfarb et al 2005, Goldfarb & Groves, 2015)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
