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Geologic map of the Chokecherry Mountain quadrangle, Lincoln County, Nevada [MAP AND TEXT]
Geol Chokecherry Mtn

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Title: Geologic map of the Chokecherry Mountain quadrangle, Lincoln County, Nevada

Author: Peter D. Rowley, Lawrence W. Snee, Ralph R. Shroba, W C Swadley, and F. William Simonds
Year: 2023
Series: Open-File Report 2023-09
Format: map sheet with cross sections: 36 x 28 inches, color; text: 31 pages, b/w
Scale: 1:24,000

This geologic map is one of two geologic quadrangles of the Caliente caldera complex to be published in 2023 by the Nevada Bureau of Mines and Geology (NBMG); five more quadrangles are anticipated. These result from mapping and related petrologic, geochemical, and isotopic studies by the authors that were funded by the U.S. Geological Survey (USGS) in the late 1980s to middle 1990s. The mapping was part of a large USGS project named the Basin and Range to Colorado Plateau Transition (BARCO) study in southeastern Nevada, southwestern Utah, and northwestern Arizona. Mapping was to be published by the USGS at detailed (1:24,000) scale, then compiled in 1:100,000-scale quadrangles. The project ended in early 1995 during the USGS Reduction in Force (RIF).

One of the subprojects of BARCO was a study of the Caliente caldera complex and its gold deposits, led by the senior author. Mapping at 1:24,000 scale began at the western end of the caldera complex, but only three quadrangles were published (Rowley and Shroba, 1991; Rowley et al., 1994; Swadley and Rowley, 1994). Abstracts cited here and summary reports (e.g., Rowley et al., 1992, 1995, 2001; Best et al., 1993; Hudson et al., 1995, 1998; Nealey et al., 1995; Unruh et al., 1995; Scott et al., 1995a, b) also were prepared before the RIF, with some published after. The seven quadrangles we intend to complete were mapped but never published. We also intend to publish with NBMG many 40Ar/39Ar dates by L.W. Snee, most of them from rocks in the caldera complex, that were never released in final form (e.g., Snee et al., 1990; Snee and Rowley, 2000). Funding from the USGS STATEMAP program awarded to NBMG has permitted synthesis and completion of our research in the area and publication of these quadrangles.

The physiography of the Chokecherry Mountain quadrangle consists mostly of the central to northern Delamar Mountains, with the central Burnt Springs Range in the northwestern part of the map area. Southern Dry Lake Valley and northern Delamar Valley lie west of the quadrangle. The other map to be published this year, the Caliente NW quadrangle to the north (Rowley et al., 2023), contains the northern Delamar Mountains, the northern Burnt Springs Range, and several small unnamed ranges. The Caliente quadrangle to the east of the map area consists of the eastern Delamar Mountains and magnificent south-flowing Rainbow Canyon that forms the eastern edge of the Delamar Mountains. The railroad town of Caliente lies in the northern end of Rainbow Canyon, where Newman Canyon joins Rainbow Canyon from the west and Clover Creek joins Rainbow Canyon from the east. North and northeast of the Caliente quadrangle, the areas of the eastern Antelope Canyon basin, Chief Range, and southern Panaca basin were mapped by Rowley and Shroba (1991) and Rowley et al. (1994). West of the map area, the western Dry Lake Valley, southern Burnt Springs Range, and part of the western Delamar Mountains were mapped by Swadley and Rowley (1994).

Research for this publication was supported by the U.S. Geological Survey, National Cooperative Geologic Mapping Program, under STATEMAP award number G21AC10873.

Suggested citation:
Rowley, P.D., Snee, L.W., Shroba, R.R., Swadley, WC, and Simonds, F.W., 2023, Geologic map of the Chokecherry Mountain quadrangle, Lincoln County, Nevada: Nevada Bureau of Mines and Geology Open-File Report 2023-09, scale 1:24,000, 31 p.

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