Index Catalog // ScholarsArchive@OSU

Crustal architecture and magma dynamics in a large continental magmatic system : a case study of the Purico-Chascon Volcanic Complex, Northern Chile

Creator:: Burns, Dale H.
Abstract:: The ~1 Myr history of the Purico-Chascon volcanic complex (PCVC) records significant changes in the production and storage of magmas in the crust. At ~1 Ma activity at the PCVC initiated with the eruption of a large 80-100 km³ crystal-rich dacite ignimbrite with restricted whole rock ⁸⁷Sr/⁸⁶Sr isotope ratios between...
Resource Type:: Dissertation

Investigating Timescales of Resurgence at Large Calderas: Post-74 ka Activity at Toba Caldera, Sumatra, Indonesia

Creator:: Mucek, Adonara E.
Abstract:: The Toba Caldera Complex is the youngest resurgent caldera in the last 100 kyrs, formed from four overlapping eruptions starting 1.2 Myrs ago. The last caldera-forming eruption, the Youngest Toba Tuff eruption, occurred ~74 kyrs ago, emitting 2800 km3 of ash and pumice into the atmosphere and forming the caldera...
Resource Type:: Dissertation
Full Text:: . Abstract approved: ______________________________________________________ Shanaka L. de Silva The

Magma dynamics and evolution in continental arcs : insights from the Central Andes

Creator:: Grocke, Stephanie B.
Abstract:: Constraining the magma evolution and dynamics that lead to the eruption of large volume continental arc systems is fundamental to our understanding of continental crust formation. An investigation into the magmagenesis that results in the formation of the Central Volcanic Zone (CVZ) in the Andes of South America, situated atop...
Resource Type:: Dissertation
Full Text:: from the Central Andes. Abstract approved: Shanaka L. de Silva Constraining the magma evolution

Stratigraphy, sedimentology, and eruptive dynamics of the 2-ka eruption of Misti Volcano, southern Peru

Creator:: Harpel, Christopher J.
Abstract:: The 2-ka eruption of Misti volcano produced voluminous flowage deposits and a wide-spread tephra-fall deposit. The flowage deposits form large terraces within channels draining the south side of the volcano. All the channels drain into the city of Arequipa. Arequipa's city center is ~16 km from the summit of the...
Resource Type:: Dissertation
Full Text:: Volcano, Southern Peru. Abstract approved: Shanaka L. de Silva The 2-ka

The Cerro Guacha caldera complex : an upper Miocene-Pliocene polycyclic volcano-tectonic structure in the Altiplano Puna Volcanic Complex of the Central Andes of Bolivia

Creator:: Iriarte, Rodrigo
Abstract:: Four multicyclic complex calderas and smaller ignimbrite shields located within the Altiplano Puna Volcanic Complex of the Central Andes (APVC) erupted 13000 km³ of magma within the last 11 Ma. One of the largest and most complex of these is the Cerro Guacha Caldera. Ar-Ar age determinations and paleomagnetic directions...
Resource Type:: Masters Thesis

Timescales of large silicic magma systems : implications from accessory minerals in Pleistocene lavas of the Altiplano-Puna Volcanic Complex, central Andes

Creator:: Tierney, Casey R.
Abstract:: Constraining the development, evolution, and timescales of large silicic magma systems is important to understanding the development of granite batholiths, the relationships between volcanoes and their plutonic underpinnings, and the development of the continental crust. The ignimbrite flare up that produced the Altiplano-Puna Volcanic Complex of the Central Andes is...
Resource Type:: Masters Thesis
Full Text:: : _______________________________________ Shanaka L. de Silva Constraining the development, evolution, and timescales of large

Timescales of large silicic magma systems : investigating the magmatic history of ignimbrite eruptions in the Altiplano-Puna Volcanic Complex of the Central Andes through U-Pb zircon dating

Creator:: Kern, Jamie M.
Abstract:: The Altiplano-Puna Volcanic Complex in the Central Andes is one of the youngest large silicic volcanic fields (LSVFs) in the world, erupting over 13,000 km³ of material during multiple supereruptions from 11 to 1 Ma. Understanding the timescales over which magma is stored in the crust prior to eruption is...
Resource Type:: Masters Thesis
Full Text:: : _______________________________________________________________________ Shanaka L. de Silva The Altiplano-‐Puna Volcanic Complex in

Understanding large resurgent calderas and associated magma systems : the Pastos Grandes Caldera Complex, southwest Bolivia

Creator:: Kaiser, Jason Frederick, 1985-
Abstract:: The Pastos Grandes Caldera Complex (PGCC) in southwest Bolivia has produced two large-volume (≥800 km³ DRE) dacite ignimbrites from a nested caldera source over a period of 5.5 Myr. In addition to the large-volume ignimbrites, a small-volume ignimbrite shield and post-climactic lavas define this composite system. Based on detailed field...
Resource Type:: Dissertation
Full Text:: Shanaka L. de Silva The Pastos Grandes Caldera Complex (PGCC) in southwest Bolivia has produced

Upper-Crustal Magma Evolution at Intermediate Arc Systems : Uranium-Series Zircon Chronochemistry of the Unzen Volcanic Complex, Southwestern Japan

Creator:: Murphy, Bethany S.
Abstract:: Crystal-rich (40-50 vol.%) intermediate lava has been the primary eruptive product of several recent hazardous eruptions: Mt. Pinatubo, Philippines (1991), Soufriere Hills, Montserrat (1995-present), and Unzen, Japan (1990-1995). Despite this association with such devastating eruptions, the formation, timing, and evacuation of such magma is not well understood: do such eruptions...
Resource Type:: Masters Thesis
Full Text:: approved: ___________________________________________________ Shanaka L. de Silva Crystal

ScholarsArchive@OSU

Crustal architecture and magma dynamics in a large continental magmatic system : a case study of the Purico-Chascon Volcanic Complex, Northern Chile

Investigating Timescales of Resurgence at Large Calderas: Post-74 ka Activity at Toba Caldera, Sumatra, Indonesia

Magma dynamics and evolution in continental arcs : insights from the Central Andes

Stratigraphy, sedimentology, and eruptive dynamics of the 2-ka eruption of Misti Volcano, southern Peru

The Cerro Guacha caldera complex : an upper Miocene-Pliocene polycyclic volcano-tectonic structure in the Altiplano Puna Volcanic Complex of the Central Andes of Bolivia

Timescales of large silicic magma systems : implications from accessory minerals in Pleistocene lavas of the Altiplano-Puna Volcanic Complex, central Andes

Timescales of large silicic magma systems : investigating the magmatic history of ignimbrite eruptions in the Altiplano-Puna Volcanic Complex of the Central Andes through U-Pb zircon dating

Understanding large resurgent calderas and associated magma systems : the Pastos Grandes Caldera Complex, southwest Bolivia

Upper-Crustal Magma Evolution at Intermediate Arc Systems : Uranium-Series Zircon Chronochemistry of the Unzen Volcanic Complex, Southwestern Japan

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