Artículo
Structurally controlled fluid flow: High-grade silver ore-shoots at Martha epithermal mine, Deseado Massif, Argentina
Paez, Gerardo Nestor
; Ruiz, R.; Guido, Diego Martin
; Jovic, Sebastian Miguel
; Schalamuk, Bernardo Isidoro
Fecha de publicación:
05/2011
Editorial:
Pergamon-Elsevier Science Ltd
Revista:
Journal Of Structural Geology
ISSN:
0191-8141
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The role of structurally controlled fluid flow during epithermal ore-shoot formation is addressed through a structural study of the high grade Martha Mine epithermal deposit (Deseado Massif, Patagonia, Argentina). Martha is a silver-rich deposit, characterised by a complex mineralogy dominated by Ag–As–Sb sulphosalts and Cu–Pb–Zn sulphides. Mineralised veins can be subdivided into two groups: master structures that trend approximately NW–SE, and second-order structures that trend E–W and coalesce into the master structures. The Martha vein system is interpreted as a hard-linked step-over zone between two NW–SE trending fault segments. Furthermore, the geometry of ore-shoots at Martha Mine suggests a first-order structural control on their location and orientation. At the deposit scale, mineralisation is concentrated in the step-over zone. Mineralisation, and presumably hydrothermal fluid flow, was concentrated at the intersection between the two main vein groups. Finally, at the scale of single veins, jogs and subordinate step-overs were important channels for hydrothermal fluids and the formation of high-grade ore-shoots.
Palabras clave:
Epithermal veins
,
Normal faults
,
Hydrothermal flow
,
Ore-shoots
,
Jurassic
,
Patagonia
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Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
Paez, Gerardo Nestor; Ruiz, R.; Guido, Diego Martin; Jovic, Sebastian Miguel; Schalamuk, Bernardo Isidoro; Structurally controlled fluid flow: High-grade silver ore-shoots at Martha epithermal mine, Deseado Massif, Argentina; Pergamon-Elsevier Science Ltd; Journal Of Structural Geology; 33; 5; 5-2011; 985-999
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