Archive | March 2013

Dr. Jim Faulds lecture – March 28 in Carson City

Who:  State Geologist and NBMG Director, Jim Faulds

What:  Frances Humphrey Lecture Series

Title:  Why is Nevada in Hot Water?: Tectonic Controls on Geothermal Activity in the Great Basin

When:  Thursday, March 28, 6:30 – 7:30 p.m. Early arrival recommended; doors open at 6:00 p.m.

Where:  Nevada State Museum, 600 N. Carson Street, Carson City

Why:  To learn more about geology, plate tectonics, geothermal activity in the Great Basin, and recent research regarding alternative energy technologies

Admission:  $8 for adults and free for museum members and ages 17 and under

Details about the topic:
Geothermal studies enhance understanding of what controls hot fluids in the earth’s crust and aid in exploration and discovery of energy resources.  Scientists study geologic faults, stress conditions, and stratigraphy to determine where to drill.

More about the speaker:
State geologist Jim Faulds is an award-winning scholar and professor in geothermal research and development. He published numerous papers on the subject and presented his work at many conferences, including the World Geothermal Congress in Bali, Indonesia and the GEONZ2010 Geoscience-Geothermal Conference in Auckland, New Zealand.  According to Faulds, “Our research will provide the baseline studies that are absolutely needed if Nevada is going to become the Saudi Arabia of geothermal.”

Contact information: Deborah Stevenson: dstevenson@nevadaculture.org or 775-687-4810, ext. 237

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Dr. Gene Smith lecture – Monday March 25 at 4 p.m. – TODAY!

Dr. Eugene Smith (Gene) will giving the Monday afternoon seminar at 4 pm in DMS 103 (March 25). Title of the talk is The Birth and Death of Intra-plate Volcanic Fields.

Gene has been on the faculty of the Dept of Geoscience at UNLV for 30+ years and is retiring this spring. He is a volcanologist and igneous petrologist, who has worked in the Basin and Range and many other places of the world. Gene has published widely. Among other things, he has worked on the Quaternary volcanism in the Yucca Mountain area. His website is at http://faculty.unlv.edu/wpmu/smithe/.

Major mines of Nevada 2011 – new

P23 – Major mines of Nevada 2011: Mineral industries in Nevada’s economy 
by Mike Visher and Alan Coyner
2012

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28 pages, $3.00 or free on the Web:
http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=P-23

This twenty-third issue of an annual series of reports on the major mines and mills in Nevada lists the names and addresses of operators, numbers of employees, and annual production in 2011. Map locations of all major mines are shown and an overview of mineral production and its effect on Nevada’s economy is presented.

Photo contest for 2014 calendar – reminder – deadline March 31

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Do you have an amazing photo of Nevada geology that you would like to see in the next 2014 Nevada Geology Calendar?

Entries are being accepted for two more weeks!

Here is information about the 2013 calendar:
http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=CAL2013
Here are the details for this contest for the 2014 calendar:

  • Deadline for entries is March 31, 2013.
  • Photos need to be taken in Nevada. A location description and/or GPS coordinates should accompany submissions along with description.
  • High-quality, high-resolution photo files of at least 300 dpi are required for quality printing.
  • You may enter as many photos as you wish.
  • E-mail submissions to Jack Hursh (jhursh@unr.edu).
  • NBMG Cartographers will make the final decision on the winning photos.
  • Prizes will be awarded for first-, second-, and third-place winners.

Jack Hursh lecture – take a photo trip – March 20

Jack Hursh, NBMG Cartographer, designed (with Jennifer Mauldin and Chris Henry) and provided many photographs for the 2013 Nevada Geology Calendar. Now you can see even more of his wonderful photographs at this lecture on March 20.

What:  “Discover Nevada” by Jack Hursh – Nevada Rock Art Foundation benefit
When:  Wednesday, March 20, 6-7 pm
Where:  National Automobile Museum theatre
10 South Lake Street, Reno (corner of Lake and Mill streets)
Free parking in lot behind museum
Cost:  Admission free to Nevada Rock Art Foundation members, National Automobile Museum members, and students with valid ID; $5 for nonmembers

“Jack Hursh provides a wide-ranging photographic essay exploring the geography and history of Nevada’s natural and built environments. The lecture will appeal to those who enjoy immersing themselves in the Nevada landscape.”

New 43-101 Report Map Service for Mineral Properties

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The Nevada Bureau of Mines and Geology is pleased to announce a new 43-101 Report Map Service.  Creation of map services has been an important component of NBMG’s efforts to modernize and make data that are relevant to mineral exploration and land use decisions readily available to the public. The 43-101 Report Map Service shows the locations of 43-101 reports in Nevada. Clicking on a location point with the “Identify” tool will result in links to the report(s). Clicking the link will result in a new window showing the report as a PDF file.

These 43-101 reports are publically available technical reports that follow a codified set of rules and guidelines for reporting and displaying information related to mineral properties owned by, or explored by, companies which report these results on stock exchanges within Canada. The map is not an exhaustive list of all the 43-101 reports completed in Nevada. NBMG will periodically update the map with additional reports, both old and new.

We hope you find this service of use.  Please contact us with feedback.  More similar map services relevant to mineral exploration will be released later this year.

Link to Map Service – http://gisweb.unr.edu/report_43101_1/

Other Map Services – http://www.nbmg.unr.edu/Mapping/InteractiveMaps.html

John Muntean (munteanj@unr.edu)
Gary Johnson (glj@unr.edu)

Ute quadrangle – two new maps

Map 177–Geologic map of the Ute quadrangle, Clark County, Nevada, by Craig M. dePolo and Wanda J. Taylor; 2012

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44 x 27.5 inches, color; 17-page text, b/w; folded or rolled, $23.00 ($18.00 for map only) or free on Web: http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=M177

A 1:24,000-scale, color geologic map of the Ute 7.5-minute quadrangle in Clark County, Nevada with descriptions of 59 geologic units and 2 cross sections. Accompanying text includes full unit descriptions and references. GIS zip file also available online.

The Ute quadrangle covers the central part of the California Wash basin and a small section of the westernmost North Muddy Mountains, where Paleozoic and Mesozoic rocks were highly deformed by the Sevier orogeny. Tertiary and Quaternary sedimentary rocks record the history of basin filling and dissection. Noteworthy on the quadrangle are several resistant Quaternary petrocalcic surfaces, with as much as Stage VI carbonate development, that form pediment caps on the Tertiary basin deposits. The map includes the northern part of the Holocene-active California Wash fault and the southernmost part of the Quaternary-active Hogan Spring fault.

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Open-File Report 12-4–Preliminary erosional impact potential map of the Ute quadrangle, Clark County, Nevada, by Craig M. dePolo and Irene M. Seelye, 2012

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20.5 x 32.5 inches, color, scale 1:24,000; folded or rolled, $14.00 or free on Web: http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=OF12-%204

There is a wide range of erosional susceptibility associated with different geologic units on the Ute quadrangle that might be considered when planning cross-country motor vehicle events, which are common in this valley. Tracks from motor races that can be seen in 1976 photography were hard to find in 2011 if they were on the harder petrocalcic surfaces, but caused long-lasting disruption of softer geologic units and surfaces with desert pavements on them. When more easily erodible units are disrupted, there is enhanced erosion from water runoff and significantly more dust is generated until the surface is stabilized with a new pavement, vegetation, or erodes down to a resistant layer. Using the distribution of the geologic units and their general erosional susceptibility, this Preliminary Erosional Impact Potential Map of the Ute Quadrangle was produced. This map can be used to plan race routes with the least erosional impact.

There are three general categories on the map:

1) more resistant units with lower erosional impact,

2) softer units that can be disrupted and eroded relatively easily, and

3) stream channels that have their surfaces refreshed when the channel flows with water.

The more resistant units include petrocalcic surfaces and pre-Tertiary limestones. Softer units include Tertiary basin sediments and Quaternary surfaces with pavements and an underlying loose silty layer. Stream channels are areas that have water flowing annually to every decade or so and have the ability to refresh themselves and recover from the effects of vehicular traffic. The map is experimental and is a simple derivative map from the Geologic Map of the Ute Quadrangle (NBMG Map 177).