thumbnail

The 40Ar/39Ar ages and tectonic setting of the Middle Eocene northeast Nevada volcanic field

Journal of Geophysical Research

By:
, ,

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time

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

Additional Publication Details

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