Hidden intrabasin extension: Evidence for dike-fault interaction from magnetic, gravity, and seismic reflection data in Surprise Valley, northeastern California
| Autor: | Jonathan M. G. Glen, Valentina C. Fontiveros, Noah D. Athens, Anne E. Egger, Simon L. Klemperer |
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| Rok vydání: | 2015 |
| Předmět: |
Dike
geography geography.geographical_feature_category Rift 010504 meteorology & atmospheric sciences Stratigraphy Geology Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Gravity anomaly Tectonics Magnetic anomaly Basin and range topography Seismology Basin and Range Province 0105 earth and related environmental sciences |
| Zdroj: | Geosphere. 12:15-25 |
| ISSN: | 1553-040X |
| DOI: | 10.1130/ges01173.1 |
| Popis: | The relative contributions of tectonic and magmatic processes to continental rifting are highly variable. Magnetic, gravity, and seismic reflection data from Surprise Valley, California, in the northwest Basin and Range, reveal an intrabasin, fault-controlled, ∼10-m-thick dike at a depth of ∼150 m, providing an excellent example of the interplay between faulting and dike intrusion. The dike, likely a composite structure representing multiple successive intrusions, is inferred from modeling a positive magnetic anomaly that extends ∼35 km and parallels the basin-bounding Surprise Valley normal fault on the west side of the valley. A two-dimensional high-resolution seismic reflection profile acquired across the magnetic high images a normal fault dipping 56°E with ∼275 m of throw buried ∼60 m below the surface. Densely spaced gravity measurements reveal a |
| Databáze: | OpenAIRE |
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