Scientific article
English

Sulfur evolution of oxidized arc magmas as recorded in apatite from a porphyry copper batholith

Published inGeology, vol. 26, no. 6, p. 523-526
Publication date1998
Abstract

Uniformly sulfur-rich cores abruptly zoned to sulfur-poor rims (∼1 to <0.2 wt% SO₃) in apatite from the Yerington batholith, Nevada, indicate that early magma that is crystal poor, oxidizing, and sulfate rich evolved to sulfate-poor magma via crystallization of anhydrite, a mineral observed in magmas from Pinatubo and El Chichón. We predict that the characteristic zonation to sulfur-poor rims of apatite in the Yerington batholith is common in other oxidized, hydrous, calc-alkaline magmas, and can be used to track cryptic anhydrite saturation as well as to monitor sulfur evolution. Sulfate-rich arc magmas such as Yerington magmas may crystallize to produce hydrothermal fluids rich in chlorine, copper, and sulfur and porphyry copper ores.

Funding
  • Swiss National Science Foundation - 20-49730.96
Citation (ISO format)
STRECK, Martin, DILLES, John H. Sulfur evolution of oxidized arc magmas as recorded in apatite from a porphyry copper batholith. In: Geology, 1998, vol. 26, n° 6, p. 523–526. doi: 10.1130/0091-7613(1998)026<0523:SEOOAM>2.3.CO;2
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ISSN of the journal0091-7613
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