Additional Facilities within the Geoscience Department
Cryptotephra Laboratory for Archaeological and Geological Research (CLAGR):
The cryptotephra laboratory in the Department of Geoscience specializes in the processing and analysis of extremely low abundance cryptotephra from sediments to provide precise dates for archaeological and geological events. The laboratory was established in 2013 to support an international effort to understand the evolution of early modern humans in southern Africa. The lab contains the equipment and supplies necessary for processing and identifying extremely low abundance cryptotephra and has access to a JEOL JXA-8900 Electron Probe Microanalyzer (EPMA) with 4 wavelength dispersive X-ray spectrometers (WDS) and an energy dispersive X-ray spectrometer (EDS). The probe is housed in UNLV’s Electron Microanalysis and Imaging Lab, a petrographic microscope with imaging system and grinding and polishing facilities. This type of tephra occurs as very small glass shards (usually < 100 microns in size) and in very low abundances (less than 10 shards/gram). Cryptotephra are found beyond the geographical limits of visible ash fall deposits, (e.g., the 74 ka eruption of the Youngest Toba Tuff) allowing correlations to be made over wider areas.
Contact: Racheal Johnsen
Fluid and Melt Inclusion Laboratory:
This lab is equipped with a USGS-type gas-flow heating/freezing stage (Fluid, Inc.) for fluid inclusion analyses, a Linkam gas flow heating/freezing stage for fluid inclusion analysis, and a Linkam high temperature stage for melt inclusion rehomogenization.
Contact: Andrew Martin
Mineral Separation Laboratory:
The Mineral Separation Laboratory is well equipped for the preparation of high purity mineral separates. Facilities for heavy liquid mineral separations include two Nuaire perchloric hoods, a centrifuge, and a Buchi Rotavapor still for the reclamation of heavy liquids. The laboratory also includes a Wilfley table for heavy mineral separations, an air-abrader, three Franz isodynamic magnetic separators, and one Franz magnetic barrier separator. An Olympus 5260 microscope with reflected fiber optic light source and transmitted light base is used for the final hand picking of mineral separates.
Contact: Previously Christopher Adcock
Nevada Rock Deformation Laboratory (NERD):
This lab is equipped with a newly refurbished Griggs modified piston cylinder apparatus capable of deformation experiments at conditions up to 1.8 GPa and 1400 ºC and strain rates between 10-4/sec and 10-7/sec. Other equipment includes: Diamond wafering saw and wire saw, Vacuum drying oven and high temperature furnace (1200 ºC); Nikon Eclipse LV100 Research grade polarizing microscope with transmitted and reflected light, outfitted with a Medenbach micro drill, Vibromet polisher (for EBSD sample preparation), Quorum Technologies QT150T ES turbo pumped sputter coater/carbon coater.
Contact: Pamela Burnley
UNLV Rock Chemistry Laboratory:
This lab maintains an X-ray Diffraction (XRD) (a Proto AXRD Benchtop Diffractometer with Fine focus Cu-anode metal/ceramic construction 1500 W x-ray tube) and X-ray Fluorescence spectrometer (XRF) for mineral and bulk rock chemical analysis of major elements.
Contact: Oliver Tschauner
Rock Preparation Facilities:
The Department of Geoscience houses several laboratory facilities for the preparation of samples for geological analysis. For sample crushing, facilities include Bico Chipmunk and Badger rock crushers, a Bico rotary disk mill, and a Ro-Tap for size sieving crushed samples. For preparation of oriented slabs and thin sections, a water saws with 18 an diamond blade, a large oil saws with 24 inch diamond blade, a trim saw, and Hillquist thin section machine and section grinder are available.
Contact: Michael Nicholl
Sampling Equipment:
Foredom CC-TCT drilling tools and drilling bits from 0.2 to 1.6 mm diameters; Sherline Precision Mill for high-resolution (to <100 μm) stable isotope sampling of carbonate laminae and cements; Merchantek computer-controlled microdrill with a dedicated Leica GZ6 microscope for super-high resolution (to 20 μm) sampling of carbonate cements and components, equipped with digital camera and screen capture; Petroscope for thin section analysis; 12X, 24X, and 42X objectives provide sample width of view (up to 22 mm) for detailed analysis of meso-scale structures. Mejia 8TR stereomicroscope and Fuji S7000 Digital Camera for image capture.
Contact: Matthew Lachniet
Shock-deformation Laboratory:
This lab is equipped with two single stage light gas guns of 7mm and 15 mm bore for velocities up to 2 km/s, velocimeters, capture tanks for shock-recovery experiments, and one vertical gun (6 mm bore, 500m/s maximum flyer velocity). Additionally, four diamond cells of a novel type optimized for single crystal diffraction at low to ambient temperatures and pressures to above 100 GPa are available. These cells provide a 92° Japperture when used on a 4-circle goniometer. There are also loading and preparation facilities for diamond anvil cells including stereozoommicroscopes, EDM micro-drilling devices, diamond alignment tools, a cryogenic loading device. A CO2-laser heating system with two combined stabilized CO2 lasers of 125 and 60 W cw power, adjustable focal spot diameter and adjustable power profile, microstage positioning, pyrometric temperature measurement through reflecting optic is also housed in this lab
Contact: Oliver Tschauner
Soil Analyses Laboratory:
Dr. Hausrath’s laboratory is located in the state-of-the-art, 208,000 ft2 UNLV Science and Engineering Building (SEB) that was completed in 2009. The wet chemistry laboratory currently supports five major research activities: 1) Mineral synthesis and preparation; 2) microbial growth experiments; 3) Mineral dissolution experiments; 4) Geochemistry sample preparation and analysis; and 5) Synchrotron sample preparation. Existing equipment includes an 18.2 ϺΩ-cm water purifier, chemical fume hoods, ovens, temperature-controlled shaker baths, a refrigerated centrifuge, an ultrasonicator, a vortexer, a laminar flow hood, a Plas-labs anoxic glove box, a Gas Chromatograph refrigerators and freezers, heated stir plates, a pH meter, vacuum filter towers, a glycolation chamber, a vacuum desiccator, rod stands, balances, pipettors, a freezer drier, and acid and water washing baths. Parr pressure vessels, a petrographic microscope and mineral crushing and sieving equipment allow for in-house mineral synthesis and preparation. A laminar flow hood enables aseptic microbial culturing. Instruments supporting aqueous geochemistry analyses include an Atomic Absorption Spectrometer and UV-Vis Spectrometer
Contact: Libby Hausrath
Structural Geology Laboratory:
Structural geology laboratory is set up for microstructural and strain analysis. A Nikon Optiphot Polarizing microscope is equipped with a Nikon 4-axis Universal Stage. An Olympus BHSP-2 Polarizing Microscope with an Olympus SC100 10.6 megapixel digital camera and cellSens digital imaging software. The lab uses NIH Image software for image processing and analysis, coupled with spreadsheet-based macro programs for strain analysis
Contact: Michael Wells