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Dynamics of a long-lived magmatic system as indicated by variations in amphibole composition and textures in dacites erupted over 11 M.y. at the Aucanquilcha Volcanic Cluster, Central Andes, Chile

Creator:

Giles, Denise E. L.

Abstract:

The Aucanquilcha Volcanic Cluster (AVC) is the erupted part of a magmatic system with a complex and long-lived history. The AVC lies at 21°S in the high Andes and is built on thick continental crust. The thick crust in the area combined with the prolonged magmatic activity make it an...

Resource Type:

Masters Thesis
Deep crustal and mantle inputs to North Sister Volcano, Oregon High Cascade Range

Creator:

Schmidt, Mariek E.

Abstract:

The Central Oregon High Cascade Range is an anomalously mafic segment of the Cascade Arc due to ongoing intra-arc extension, which allows most magmas to traverse the crust without stalling and evolving to more evolved compositions. North Sister, a composite volcano in this arc segment, has produced a seemingly monotonous...

Resource Type:

Dissertation
Evolution of volcanism and hydrothermal activity in the Yanacocha Mining District, northern Perú

Creator:

Longo, Anthony A.

Abstract:

The Yanacocha Mining District in northern Perú is considered the largest group of high-sulfidation style epithermal gold deposits in the world. District-scale geologic mapping coupled with detailed 40Ar/39Ar geochronology, geochemistry and petrography establish the volcanic history of the area and analyze the temporal and spatial evolution of volcanism, hypogene advanced...

Resource Type:

Dissertation

ScholarsArchive@OSU

Dynamics of a long-lived magmatic system as indicated by variations in amphibole composition and textures in dacites erupted over 11 M.y. at the Aucanquilcha Volcanic Cluster, Central Andes, Chile

Deep crustal and mantle inputs to North Sister Volcano, Oregon High Cascade Range

Evolution of volcanism and hydrothermal activity in the Yanacocha Mining District, northern Perú

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