eCite Digital Repository

How metalliferous brines line Mexican epithermal veins with silver


Wilkinson, JJ and Simmons, SF and Stoffell, B, How metalliferous brines line Mexican epithermal veins with silver, Scientific Reports, 3 Article 2057. ISSN 2045-2322 (2013) [Refereed Article]


Copyright Statement

Licensed under Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)

DOI: doi:10.1038/srep02057


We determined the composition of ,30-m.y.-old solutions extracted from fluid inclusions in one of the world’s largest and richest silver ore deposits at Fresnillo, Mexico. Silver concentrations average 14 ppm and have a maximum of 27 ppm. The highest silver, lead and zinc concentrations correlate with salinity, consistent with transport by chloro-complexes and confirming the importance of brines in ore formation. The temporal distribution of these fluids within the veins suggests mineralization occurred episodically when they were injected into a fracture system dominated by low salinity, metal-poor fluids. Mass balance shows that a modest volume of brine, most likely of magmatic origin, is sufficient to supply the metal found in large Mexican silver deposits. The results suggest that ancient epithermal ore-forming events may involve fluid packets not captured in modern geothermal sampling and that giant ore deposits can form rapidly from small volumes of metal-rich fluid.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Exploration geochemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Wilkinson, JJ (Professor Jamie Wilkinson)
ID Code:88295
Year Published:2013
Web of Science® Times Cited:14
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2014-01-24
Last Modified:2017-11-06
Downloads:344 View Download Statistics

Repository Staff Only: item control page