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Range front faulting and volcanism in the Mono Basin, eastern California

Bursik, Marcus and Sieh, Kerry (1989) Range front faulting and volcanism in the Mono Basin, eastern California. Journal of Geophysical Research. Solid Earth, 94 (B11). pp. 15587-15609. ISSN 2169-9313. doi:10.1029/JB094iB11p15587.

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The spatial and temporal pattern of range front normal faulting and volcanism in the Mono Basin of eastern California suggests that dikes are being intruded underneath the Mono Craters in response to crustal stretching and are now accommodating strain that was once taken up by range front faulting. The section of the Sierra Nevadan range front near the craters accommodated as much as 1 mm/yr of extension as recently as about 40,000 years ago. For the past 40,000 years, this section of range front has been inactive, even though range front extension to the north and south has continued at up to 0.9 mm/yr. For the past 40,000 years, dikes, intruding underneath the Mono Craters, seem to have been accommodating the 1 mm/yr of extension that was previously taken up by faulting. Since the basin is extending obliquely to the trend of the frontal faults, there is a component of dextral shear to their motion, so that the Mono Craters may be forming on an extensional boundary of a pull‐apart basin. If the craters represent incipient caldera formation, then calderas such as Long Valley may also have formed in pull‐apart zones.

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Sieh, Kerry0000-0002-7311-2447
Additional Information:© 1989 by the American Geophysical Union. Paper number 89JB00848. Received August 22, 1988; revised March 30, 1989; accepted April 27, 1989. We thank Leslie Sander for reading through an earlier version of our manuscript. The work has also benefited from discussions with Malcolm Clark, Charlie Bacon, Roy Bailey, Dan Miller, Craig de Polo and Sylvia Pezzopane. Scott Stine pointed out to us some of the faults near Mono Lake. We thank Ileana Meza, Gregory Ehe, Andy Thomas and Colin Howell for assistance in the field. The Los Angeles Department of Water and Power graciously allowed us to inspect exploratory logs for the Mono Craters Tunnel. Steve Barsi of Lee Vining allowed us to recharge geodimeter batteries. The work was supported by U.S. Geological Survey Earthquake Hazards Reduction Program grants 14-08-0001-22011, -G1098 and -G1370; by Geological Society of America Penrose grant 3547-86, and by the Allan V.C. Davis Foundation. The total station was provided by funds from the W.M. Keck Foundation and by U.S. Geological Survey Earthquake Hazards Reduction Program grant 14-08-0001-G1177.
Group:Seismological Laboratory
Funding AgencyGrant Number
Geological Society of America3547-86
W. M. Keck FoundationUNSPECIFIED
Allan V. C. Davis FoundationUNSPECIFIED
Issue or Number:B11
Record Number:CaltechAUTHORS:20190917-154236757
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Official Citation:Bursik, M., and Sieh, K. (1989), Range front faulting and volcanism in the Mono Basin, eastern California, J. Geophys. Res., 94(B11), 15587–15609, doi:10.1029/JB094iB11p15587
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98699
Deposited By: Tony Diaz
Deposited On:17 Sep 2019 23:01
Last Modified:16 Nov 2021 17:40

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