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Seismic imaging in Long Valley, California, by surface and borehole techniques: An investigation of active tectonics

Rundle, John B. and Elbrig, Greg J. and Striker, Richard P. and Finger, John T. and Carson, Charles C. and Walck, Marianne C. and Ellsworth, William L. and Hill, David P. and Malin, Peter and Tono, Enrique and Robertson, Michelle and Kuhlman, Steve and McEvilly, Tom and Clymer, Richard and Smithson, Scott B. and Deemer, Sharon and Johnson, Roy and Henyey, Tom and Hauksson, Egill and Leary, Peter and McCraney, John and Kissling, Edi (1985) Seismic imaging in Long Valley, California, by surface and borehole techniques: An investigation of active tectonics. Eos, 66 (18). pp. 194-200. ISSN 0096-3941. https://resolver.caltech.edu/CaltechAUTHORS:20181204-111229201

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Abstract

The search for silicic magma in the upper crust is converging on the Long Valley Caldera of eastern California, where several lines of geophysical evidence show that an active magma chamber exists at mid‐to lower‐crustal depths. There are also other strong indications that magma may be present at depths no greater than about 5 km below the surface. In this paper, we review the history of the search for magma at Long Valley. We also present the preliminary results from a coordinated suite of seismic experiments, conducted by a consortium of institutions in the summer and fall of 1984, that were designed to refine our knowledge of the upper extent of the magma chamber. Major funding for the experiments was provided by the Geothermal Research Program of the U.S. Geological Survey (USGS) and by the Magma Energy Technology Program of the U.S. Department of Energy (DOE), a program to develop the technology necessary to extract energy directly from crustal magma. Additional funding came from DOE's Office of Basic Energy Sciences and the National Science Foundation (NSF). Also, because extensive use was made of a 0.9‐km‐deep well lent to us by Santa Fe Geothermal, Inc., the project was conducted partly under the auspices of the Continental Scientific Drilling Program (CSDP). As an integrated seismic study of the crust within the caldera that involved the close cooperation of a large number of institutions, the project was moreover viewed as a prototype for future scientific experiments to be conducted under the Program for Array Seismic Studies of the Continental Lithosphere (PASSCAL). The experiment thus represented a unique blend of CSDP and PASSCAL methods, and achieved goals consistent with both programs.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/eo066i018p00194DOIArticle
ORCID:
AuthorORCID
Hauksson, Egill0000-0002-6834-5051
Additional Information:© 1985 American Geophysical Union. First published: 30 April 1985. Funding for this project has been provided by the U.S. Department of Energy under contract DE-AC04-76DP00789 to Sandia National Laboratories from the Division of Geothermal and Hydropower Technology and from the Office of Basic Energy Sciences; by the Geothermal Research Program of the U.S. Geological Survey; and by the National Science Foundation. We are grateful to all those who have made this joint project possible.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC04-76DP00789
USGSUNSPECIFIED
NSFUNSPECIFIED
Issue or Number:18
Record Number:CaltechAUTHORS:20181204-111229201
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20181204-111229201
Official Citation:Rundle, J. B., et al. (1985), Seismic imaging in Long Valley, California, by surface and borehole techniques: An investigation of active tectonics, Eos Trans. AGU, 66(18), 194–200, doi: 10.1029/EO066i018p00194
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91432
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 Dec 2018 19:21
Last Modified:03 Oct 2019 20:35

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