geophysical observations of Lusi; hydrothermal systems; volcano hydrogeology; modeling liquefaction
Malvoisin Benjamin, Mazzini Adriano, Miller Stephen A. (2018), Deep hydrothermal activity driving the Lusi mud eruption, in Earth and Planetary Science Letters
, 497, 42-49.
Mauri Guillaume, Husein Alwi, Mazzini Adriano, Karyono Karyono, Obermann Anne, Bertrand Guillaume, Lupi Matteo, Prasetyo Hardi, Hadi Soffian, Miller Stephen A. (2018), Constraints on density changes in the funnel-shaped caldera inferred from gravity monitoring of the Lusi mud eruption, in Marine and Petroleum Geology
, 90, 91-103.
Mauri Guillaume, Husein Alwi, Mazzini Adriano, Irawan Dwinata, Sohrabi Reza, Hadi Soffian, Prasetyo Hardi, Miller Stephen A. (2018), Insights on the structure of Lusi mud edifice from land gravity data, in Marine and Petroleum Geology
, 90, 104-115.
Panzera Francesco, D'Amico Sebastiano, Lupi Matteo, Mauri Guillaume, Karyono Karyono, Mazzini Adriano (2018), Lusi hydrothermal structure inferred through ambient vibration measurements, in Marine and Petroleum Geology
, 90, 116-124.
Miller Stephen A., Mazzini Adriano (2018), More than ten years of Lusi: A review of facts, coincidences, and past and future studies, in Marine and Petroleum Geology
, 90, 10-25.
Sohrabi Reza, Jansen Gunnar, Malvoisin Benjamin, Mazzini Adriano, Miller Stephen A. (2018), Numerical modeling of the Lusi hydrothermal system: Initial results and future challenges, in Marine and Petroleum Geology
, 90, 191-200.
Jansen Gunnar, Sohrabi Reza, Miller Stephen A. (2017), HULK – Simple and fast generation of structured hexahedral meshes for improved subsurface simulations, in Computers & Geosciences
, 99, 159-170.
We propose to conduct a suite of geophysical and laboratory investigations to constrain the lithological, geotechnical, hydrogeological and hydrothermal properties of the Lusi hydrothermal complex. Geophysical observations laboratory experiments will be used to constrain numerical modeling of a range of unsolved problems. Specifically, we propose (1) high-resolution micro-gravity studies of the Lusi eruption site and its southward extension towards the active volcanic complex, (2) Magnetotelluric (MT) surveys of the eruption site to constrain dominant fluid pathways in the subsurface, (3) MT studies to the south of the eruption site to search deeper levels for a sill intrusion hypothesized to be hydrothermally driving this system, (4) Geo-electric studies study the shallow subsurface and calibrate our other geophyiscal measurements, (5) Process and incorporate seismic reflection profiles into hydrogeological hydrothermal numerical models, (6) photogrammetry studies using the existing drone at Lusi to explore the possibility that Lusi represents a natural meso-scale analog to plate tectonics, and (7) active seismic surveys to constrain the geometry of the mud basin. We will collaborate closely and synthesize data with other ongoing geochemical and passive seismic monitoring investigations. We also propose to perform numerical modeling studies constrained by geophysical observation to (1) Create 3D geological models to investigate the large-scale hydrogeological and hydrothermal properties of this mud eruption/volcanic arc system. (2) Develop and investigate reactive transport models constrained by geochemical observations acquired from the Lusi vent and surroundings, (3) Couple wave propagation codes to liquefaction models to investigate i) eruptive properties in response to incoming energy of nearby and distant earthquakes and constrained by seismic observations, and ii) assess the potential for a catastrophic and very hazardous event of large-scale liquefaction of the evolved mud basin, and (4) Further develop models of geyser behavior to constrain the properties of the roots of this system.