Elastic source model of the North Mono eruption (1325–1368 A.D.) based on shoreline deformation
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Topographic data from the Shuttle Radar Topography Mission (SRTM) captures the permanent deformation of a prominent highstand of Mono Lake, California USA. Deformation of the Dechambeau Ranch highstand shoreline was measured using the elevation of the beach berm—shoreline bluff break-in-slope. Point source models and a boundary element dike model were used to approximate the source of deformation underneath the northern end of the Mono Craters. The point source model could not adequately explain the observed deformation. The dike model yielded the best results for a NW trending dike dipping 60° NE and inflated to widths greater than 60 m. The results suggest that the geometry of the source is more complex than a simple vertical dike and that the deformation is better explained with a dipping dike following a normal fault, or an elongated cryptodome.
KeywordsNorth Mono eruption Mono-Inyo craters Mono Lake, California Deformation Uplift Shoreline Intrusion Dike Model Poly3D Mogi source Volcanotectonic
This work was supported primarily by NASA grants NAG534142 and NNX08AF75G to study use of SRTM data in modeling volcanic phenomena. Funding from USGS 9ARRAV0030 was helpful in finalizing the work. The suggestions of reviewer Juan Manuel Espindola-C. and an anonymous reviewer are greatly appreciated.
- Bailey RA (1989) Geologic map of long Valley Caldera, Mono—Inyo Craters volcanic chain, and vicinity, Eastern California, US Geol Surv Misc Invest Map I-1933, Scale 1:62, 500Google Scholar
- Griffin K (1998) Poly3D: a tutorial-base users’ manual for Poly3D. 59p. http://www.geo.umass.edu/faculty/cooke/poly3d/polyIntro.pdf (accessed 9 March 2010)
- Mogi K (1958) Relations of the eruptions of various volcanoes and the deformations of the ground surfaces around them. Bull Earthq Res Inst Univ Tokyo 36:99–134Google Scholar
- Shaffer W (2006) Evaluation of the Shuttle Radar Topography Mission Digital Elevation Model and application to the modeling of permanent deformation: case studies on the North Mono eruption, California (1325–1368 AD) and glacial Lake Iroquois, New York (12,200 yr BP). MS thesis, University at BuffaloGoogle Scholar
- Stine SW (1987) Mono Lake: the past 4,000 years. PhD thesis, University of CaliforniaGoogle Scholar
- Thomas AL (1993) Poly3D: a three-dimensional, polygonal element, displacement discontinuity boundary element computer program with applications to fractures, faults, and cavities in the Earth’s crust. MS thesis, Stanford UniversityGoogle Scholar