The 40Ar/39Ar ages and tectonic setting of the Middle Eocene northeast Nevada volcanic field
Journal of Geophysical Research
By: W. E. Brooks, C.H. Thorman, and L. W. Snee
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Abstract
Widespread middle to late Eocene calc-alkalic volcanism, which formed the Northeast Nevada Volcanic Field, marks the earliest Tertiary volcanism in the northern Basin and Range. The central part of this major field in northest Nevada and adjacent Utah is herein defined by 23 40Ar/39Ar ages that arange from 42.6 to 39.0 Ma, rock chemistry from 12 localities, stratigraphic position of the volcanic rocks above a regional middle Eocene unconformity, volcanic setting, and lithology. The type area is at Nanny Creek, in the northern Pequop Mountains, Nevada. In the western and southeastern parts of the field these middle Eocene volcanic rocks rest with depositional angular discordance on lower Eocene lacustrine strata of the Elko and White Sage Formations, respectively. This angular discordance documents a middle Eocene deformational event previously unrecognized in the region. -from Authors
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The 40Ar/39Ar ages and tectonic setting of the Middle Eocene northeast Nevada volcanic field |
| Series title | Journal of Geophysical Research |
| Volume | 100 |
| Issue | B6 |
| Year Published | 1995 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Geophysical Research |
| Google Analytic Metrics | Metrics page |