The Chapada Cu-Au deposit, Mara Rosa magmatic arc, Central Brazil: Constraints on the metallogenesis of a Neoproterozoic large porphyry-type deposit
详细信息 查看全文
- 作者：Claudinei Gouveia de Oliveiraa ; gouveia@unb.br" class="auth_mail" title="E-mail the corresponding author ; Frederico Bedran de Oliveirab ; Maria Emilia Schutesky Della Giustinaa ; Gustavo Campos Marquesc ; Elton Luis Dantasa ; Má ; rcio Martins Pimentela ; Bernhard Manfred Buhna
- 关键词：Goiá ; s Magmatic Arc ; Neoproterozoic ; Porphyry Cu&ndash ; Au deposit ; Hydrothermal alteration ; Kyanite-bearing rocks
- 刊名：Ore Geology Reviews
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：72
- 期：part_P1
- 页码：1-21
- 全文大小：5963 K
文摘
- •
We propose a two-stage genetic model for the Chapada deposit: an early porphyry Cu-Au and shear zone-hosted Cu-Au events;
- •
The Chapada Cu–Au deposit is an example of a metamorphosed Porphyry-type copper–gold deposit of Neoproterozoic age;
- •
Kyanite-rich rocks are interpreted as products of metamorphosed argillic hydrothermal alteration halo.
- •
Sulfide δ34S values indicate that both mineralization stages were generated by sulfur of magmatic composition.