The Silent Canyon Caldera Complex--A three-dimensional model based on drill-hole stratigraphy and gravity inversion
- USGS
The structural framework of Pahute Mesa, nevada, is dominated by the Silent Canyon caldera complex, a buried, multiple collapse caldera complex. Using the boundary surface between low density Tertiary volcanogenic rocks and denser granitic and weakly metamorphosed sedimentary rocks (basement) as the outer faults surfaces for the modeled collapse caldera complex, it is postulated that the caldera complex collapsed on steeply dipping arcuate faults two, possibly three, times following eruption of at least two major ash-flow tuffs. The caldera and most if its eruptive products are now deeply buried below the surface of Pahute Mesa. Relatively low-density rocks in the caldera complex produce one of the largest gravity lows in the western conterminous United States.
- Research Organization:
- United States Geological Survey - Nevada, Las Vegas, NV (US)
- Sponsoring Organization:
- USDOE Nevada Operations Office (US)
- DOE Contract Number:
- AI08-96NV11967
- OSTI ID:
- 15123
- Report Number(s):
- USGS OFR 99-555
- Country of Publication:
- United States
- Language:
- English
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