Pb-Zn-Cu-Ag deposits of the Granadena mine, San Francisco del Oro-Santa Barbara district, Chihuahua, Mexico

Glenn J. Grant, Joaquin Ruiz

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Mid-Tertiary polymetallic quartz sulfide vein deposits of the San Francisco del Oro-Santa Barbara district are among the largest Pb-Zn-Cu-Ag deposits in Mexico. The veins of this district are hosted by the Cretaceous Parral shale. Vein formation occurred in at least four distinct stages that define an unusual paragenetic sequence when compared to similar systems. Stage 1 veins are characterized by abundant sphalerite and galena, and minor quartz, with weak alteration halos of epidote, axinite, chlorite, quartz, and minor andradite. Stage 2 veins are characterized by an abundance of calc-silicate minerals within the veins, sulfides, a small amount of gold mineralization, and a pervasive, calc-silicate-rich alteration assemblage containing manganoan hedenbergite, manganoan ilvaite, quartz, minor andradite, and hematite. Stage 3 and 4 veins are characterized by quartz, calcite, and fluorite. Fluid inclusion studies reveal a highly complex ore-forming history. The deposits of the San Francisco del Oro/Santa Barbara district were probably emplaced during several episodes and these ores may represent the superposition of at least two distinct hydrothermal systems.

Original languageEnglish (US)
Pages (from-to)1683-1702
Number of pages20
JournalEconomic Geology
Volume83
Issue number8
StatePublished - Dec 1988

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Quartz
Mexico
veins
Deposits
deposits
quartz
andradite
Sulfides
Ores
minerals
sulfide
Silicate minerals
hedenbergite
Silicates
sulfides
silicates
Fluorspar
Calcium Carbonate
silicate mineral
fluorite

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Pb-Zn-Cu-Ag deposits of the Granadena mine, San Francisco del Oro-Santa Barbara district, Chihuahua, Mexico. / Grant, Glenn J.; Ruiz, Joaquin.

In: Economic Geology, Vol. 83, No. 8, 12.1988, p. 1683-1702.

Research output: Contribution to journalArticle

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