Wolframite, tetrahedrite, and base metal sulfides in quartz veins associated with a 10-m.y.-old quartz monzonite stock. 87 Sr/ 86 Sr of fluid inclusion waters in the host minerals ranges from 0.7058 to 0.7239 with Rb/Sr < or = 0.027. The independent variables delta D and 87 Sr/ 86 Sr clearly indicate the following: (1) that delineation of the three recognized waters involved in the mineralization process is possible; (2) that wolframite was deposited from magma-derived tungsten in solution when a large (30-50%) meteoric water influx caused precipitation by a concurrent drop in fluid temperature, a decrease in salinity, and an increase in pH and f O2 of the fluid; (3) that sulfide mineralization was from mixed derivation ore fluids, even though a magmatic source of sulfur is indicated; and (4) that fluorite exclusively is related to fluids deriving both water and solutes from the stock.--Modified journal abstract.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.