Publications
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Combining ash analyses with remote sensing to identify juvenile magma involvement and fragmentation mechanisms during the 2018/19 small eruption of Peteroa volcano (Southern Andes) Combining ash analyses with remote sensing to identify juvenile magma involvement and fragmentation mechanisms during the 2018/19 small eruption of Peteroa volcano (Southern Andes)
The Planchón Peteroa Volcanic Complex (PPVC) is located on the border of Chile and Argentina, and is one of the most active volcanic systems in the Andes. Holocene activity has included magma-water interaction with an evolving series of crater lakes, mainly sourced from Peteroa volcano. This study examines data from the 2018/19 eruption, together with the volcanic history of the PPVC, to...
Authors
Jorge E Romero, Felipe Aguilera, Francisco Delgado, Danny Guzman, Alexa R. Van Eaton, Nicolas Luengo, Javiera Caro, Jorge Bustillos, Alicia Guevara, Sven Holbik, Daniel Tormey, Iver Zegarra
Interpreting and reporting 40Ar/39Ar geochronologic data Interpreting and reporting 40Ar/39Ar geochronologic data
The 40Ar/39Ar dating method is among the most versatile of geochronometers, having the potential to date a broad variety of K-bearing materials spanning from the time of Earth’s formation into the historical realm. Measurements using modern noble-gas mass spectrometers are now producing 40Ar/39Ar dates with analytical uncertainties of ∼0.1%, thereby providing precise time constraints for...
Authors
Allen J. Schaen, Brian R. Jicha, Kip V. Hodges, Pieter Vermeesch, Mark E. Stelten, Cameron M. Mercer, David Phillips, Tiffany Rivera, Fred Jourdan, Erin L. Matchan, Sidney R. Hemming, Leah E. Morgan, Simon P. Kelley, William S. Cassata, Matt T. Heizler, Paulo M. Vasconcelos, Jeff A. Benowitz, Anthony A.P. Koppers, Darren F. Mark, Elizabeth M. Niespolo, Courtney J. Sprain, William E. Hames, Klaudia F. Kuiper, Brent D. Turrin, Paul R. Renne, Jake Ross, Sebastian Nomade, Herve Guillou, Laura E. Webb, Barbara A. Cohen, Andrew T. Calvert, Nancy Joyce, Morgan Ganderod, Jan Wijbrans, Osamu Ishizuka, Huaiyu He, Adan Ramirez, Jorg Pfander, Margarita Lopez-Martinez, Huaning Qiu, Brad S. Singer
Response: Commentary: Variability in Shelf Sedimentation in Response to Fluvial Sediment Supply and Coastal Erosion Over the Past 1,000 Years in Monterey Bay, CA, United States Response: Commentary: Variability in Shelf Sedimentation in Response to Fluvial Sediment Supply and Coastal Erosion Over the Past 1,000 Years in Monterey Bay, CA, United States
No abstract available.
Authors
Joe Carlin, Jason A. Addison, Amy Wagner, Valerie Evelyn Schwartz, Jamie Hayward, Victoria Severin
Quantifying gas emissions associated with the 2018 rift eruption of Kīlauea Volcano using ground-based DOAS measurements Quantifying gas emissions associated with the 2018 rift eruption of Kīlauea Volcano using ground-based DOAS measurements
Starting on 3 May 2018, a series of eruptive fissures opened in Kīlauea Volcano’s lower East Rift Zone (LERZ). Over the course of the next 3 months, intense degassing accompanied lava effusion from these fissures. Here, we report on ground-based observations of the gas emissions associated with Kīlauea’s 2018 eruption. Visual observations combined with radiative transfer modeling show...
Authors
Christoph Kern, Allan Lerner, Tamar Elias, Patricia A. Nadeau, Lacey Holland, Peter J. Kelly, Cynthia Werner, Laura E. Clor, Michael Cappos
Geochemical modeling of iron and aluminum precipitation during mixing and neutralization of acid mine drainage Geochemical modeling of iron and aluminum precipitation during mixing and neutralization of acid mine drainage
Geochemical modeling of precipitation reactions in the complex matrix of acid mine drainage is fundamental to understanding natural attenuation, lime treatment, and treatment procedures that separate constituents for potential reuse or recycling. The three main dissolved constituents in acid mine drainage are iron, aluminum, and sulfate. During the neutralization of acid mine drainage...
Authors
D. Kirk Nordstrom
Cyclic shear zone cataclasis and sintering during lava dome extrusion: Insights from Chaos Crags, Lassen Volcanic Center (USA) Cyclic shear zone cataclasis and sintering during lava dome extrusion: Insights from Chaos Crags, Lassen Volcanic Center (USA)
The ascent and extrusion of crystal-rich magma is commonly facilitated by deformation partitioned within annular, conduit-parallel shear zones. The physical properties and textures of the shear zone materials, where exposed at surface, provide a record of ascent and eruption dynamics. We describe the shear zone developed in Dome C, part of Chaos Crags in the Lassen Volcanic Center...
Authors
Amy Ryan, Michael J. Heap, James K. Russell, Lori A. Kennedy, Michael A. Clynne
The prevalence and significance of offset magma reservoirs at arc volcanoes The prevalence and significance of offset magma reservoirs at arc volcanoes
Determining the spatial relations between volcanic edifices and their underlying magma storage zones is fundamental for characterizing long-term evolution and short-term unrest. We compile centroid locations of upper crustal magma reservoirs at 56 arc volcanoes inferred from seismic, magnetotelluric, and geodetic studies. We show that magma reservoirs are often horizontally offset from...
Authors
Allan H. Lerner, Daniel O'Hara, Leif Karlstrom, Susanna K. Ebmeier, Kyle R. Anderson, Shaul Hurwitz
Geology and eruptive history of Bogoslof volcano Geology and eruptive history of Bogoslof volcano
Bogoslof volcano is a shallow submarine/subaerial volcano in the southern Bering Sea about 100 km west of the community of Dutch Harbor, Alaska. The subaerial parts of the volcano consist of two small islands, Bogoslof Island and Fire Island, that together have a total area of about 1.6 km2. Bogoslof was first depicted on a Russian map in 1772 and since then has been observed and visited
Authors
Christopher F. Waythomas, Matthew Warren Loewen, Kristi L. Wallace, Cheryl E. Cameron, Jessica F. Larsen
Felsic melt and gas mobilisation during magma solidification: An experimental study at 1.1 kbar Felsic melt and gas mobilisation during magma solidification: An experimental study at 1.1 kbar
Melt and gas transfer processes are essential to the formation and growth of the Earth’s crust and for sustaining volcanic activity. These processes also play a major role in magma fractionation at shallow depths (
Authors
Mattia Pistone, Lukas Baumgartner, Florence Begue, Paul A. Jarvis, Elias Bloch, Martin Robyr, Othmar Muntener, Thomas W. Sisson, Jon D. Blundy
Observations on the structure of Surtsey Observations on the structure of Surtsey
Comparison of investigations of the 1979 and 2017 cored boreholes coupled with continued observations of the dynamic surface of Surtsey has modified our concepts of the subsurface structure of the volcano. A geometrical analysis of the 2017 vertical and inclined cores indicates that near-surface layering dips westerly, indicating that the boreholes are located inside the Surtur crater...
Authors
James G. Moore, Marie D. Jackson
Modeling groundwater inflow to the new crater lake at Kīlauea Volcano, Hawaiʻi Modeling groundwater inflow to the new crater lake at Kīlauea Volcano, Hawaiʻi
During the 2018 eruption of Kīlauea Volcano, Hawai'i, scientists relied heavily on a conceptual model of explosive eruptions triggered when lava‐lake levels drop below the water table. Numerical modeling of multiphase groundwater flow and heat transport revealed that, contrary to expectations, liquid water inflow to the drained magma conduit would likely be delayed by months to years...
Authors
Steven E. Ingebritsen, Ashton F. Flinders, James P. Kauahikaua, Paul A. Hsieh
Source model for Sabancaya volcano constrained by DInSAR and GNSS surface deformation observation Source model for Sabancaya volcano constrained by DInSAR and GNSS surface deformation observation
Sabancaya is the most active volcano of the Ampato-Sabancaya Volcanic Complex (ASVC) in southern Perú and has been erupting since 2016. The analysis of ascending and descending Sentinel-1 orbits (DInSAR) and Global Navigation Satellite System (GNSS) datasets from 2014 to 2019 imaged a radially symmetric inflating area, uplifting at a rate of 35 to 50 mm/yr and centered 5 km north of...
Authors
Gregorio Boixart, Luis Cruz, Rafael Miranda, Pablo Euillades, Leonardo Euillades, Maurizio Battaglia