...D.A. Ponce; J.M.G. Glen Abstract We consider the origin and character of a prominent large-scale geophysical feature in north-central Nevada that is coincident with the western margin of the northern Nevada rift—a mid-Miocene rift that includes mafic dike swarms and associated volcanic rocks...

...Janet T. Watt; Jonathan M.G. Glen; David A. John; David A. Ponce Abstract A three-dimensional (3D) geologic model of part of the northern Nevada rift encompassing the Beowawe geothermal system was developed from a series of two-dimensional (2D) geologic and geophysical models. The 3D model...

...Joseph P. Colgan Abstract The northern Nevada rift is a prominent mafic dike swarm and magnetic anomaly in north-central Nevada inferred to record the Middle Miocene (16.5–15.0 Ma) extension direction in the northern Basin and Range province in the western United States. From the 245°–250° rift...

...MARY LOU ZOBACK; EDWIN H. McKEE; RICHARD J. BLAKELY; GEORGE A. THOMPSON Abstract As defined by the most recent aeromagnetic surveys, the north-northwest-trending northern Nevada rift zone extends for at least 500 km from southern Nevada to the Oregon Nevada border. At several places along the rift...

...Mary Lou Zoback; George A. Thompson Abstract A linear rift composed of dike swarms and graben-filling volcanic rocks marks the inception of Basin and Range rifting in northern Nevada 17 to 14 m.y. ago. This mid-Miocene rift, with its associated aeromagnetic anomaly, indicates S68°W-N68°E (±5...

...D. A. Ponce; J. M. G. Glen Abstract Geophysical maps of northern Nevada reveal at least three and possibly six large-scale arcuate features, one of which corresponds to the northern Nevada rift that possibly extends more than 1,000 km from the Oregon-Idaho border to southern Nevada. These features...

... defined in this report are the Walker Lane, Rye Patch, Midas, Pancake Range, Warm Springs, Timpahute, Pahranagat, and Northern Nevada Rift. The three structural zones are the Walker Lane structural zone, the Humboldt structural zone, and the Southern Nevada structural zone. The northwest-trending Walker...

... of geologic and geophysical features. Aeromagnetic maps reveal some of the most important elements of this pattern, which are several narrow, arcuate anomalies, here referred to as the Northern Nevada rifts. These rifts extend hundreds of kilometers across Nevada and are likely caused by highly magnetic...

... reflecting a hanging-wall influence related to uplift of the Ruby Mountains-East Humboldt core complex on the east side of the Elko basin. The later faults are concentrated along the north-northwest–trending northern Nevada rift west of the Tuscarora Mountains. The area west of the rift contains major tilted...

...) were found to be the optimum number that best represents the geophysical data. The resulting map of the distribution of these groups shows linear features which define a geophysical trend not previously recognized. This trend is clearly related to the northern Nevada rift and extends from near...

... the northern McDermitt volcanic field, through McDermitt caldera and the Santa Rosa–Calico center, to the northern Nevada Rift. A similar linear trend is observed ∼75 km to the west, where the Hawks Valley–Lone Mountain center and the calderas of the High Rock caldera complex define an ∼N20°E trend radiating...

...David A. John; Albert H. Hofstra; Robert J. Fleck; Jon E. Brummer; Eric C. Saderholm Abstract The Mule Canyon mine exploited shallow, low-sulfidation, epithermal Au-Ag deposits that lie near the west side of the Northern Nevada rift in northern Lander County, Nevada. Mule Canyon consists of six...

... contemporaneously with middle Miocene volcanism related to the nearby northern Nevada rifts, suggesting a link between magmatism and extensional stresses in the crust that facilitated normal faulting in the East Range. Younger fault slip, although less well constrained, began after 10 Ma and is synchronous...