Rick Moscati began his career as a geologist for the US EPA in 1990. In 1991 he was hired by the USGS, Branch of Isotope Geology, and then transfered to the Yucca Mountain Project Branch in 1992 to assist with stable isotope studies related to the proposed nuclear repository at Yucca Mountain.
Rick Moscati is a geochemist with the USGS Yucca Mountain Project Branch, Denver, Colorado, and has been a member of the YMPB Geochemistry Team since 1992. Rick is the PI of the Isotope and Chemical Monitoring of Precipitation study at Yucca Mountain, and also participated in a large-scale Great Basin precipitation study from 1993 to 1999. Rick also provides the Geochemistry Team with research capabilities in the areas of: · stable isotope mass spectrometry of O, H, S, and C for numerous geologic materials and waters · fluid inclusion temperature determination of secondary mineralization · X-ray microfluorescence spectrometry and multispectral image analysis of secondary mineral abundance · cathode luminescence analysis · Collateral Duty Safety Officer for all Denver-based Yucca Mountain Project personnel and their labs In addition to his duties with the YMP, Rick also participates in many outside projects including: · providing laboratory support for U-Pb dating of zircon crystals for Afghanistan project · operating the SEM for mineral mapping for various projects · stable isotope support for Great Basin National Park, Pahranagat National Wildlife Refuge, Black Canyon (NV) studies · providing multispectral image analysis for Chalk River (Ontario) crystalline rocks
Science and Products
In situ LA-ICPMS U–Pb dating of cassiterite without a known-age matrix-matched reference material: Examples from worldwide tin deposits spanning the Proterozoic to the Tertiary
Cassiterite (SnO2), a main ore mineral in tin deposits, is suitable for U–Pb isotopic dating because of its relatively high U/Pb ratios and typically low common Pb. We report a LA-ICPMS analytical procedure for U–Pb dating of this mineral with no need for an independently dated matrix-matched cassiterite standard. LA-ICPMS U-Th-Pb data were...Neymark, Leonid; Holm-Denoma, Christopher S.; Moscati, Richard J.
Geologic map of the upper Arkansas River valley region, north-central Colorado
This 1:50,000-scale U.S. Geological Survey geologic map represents a compilation of the most recent geologic studies of the upper Arkansas River valley between Leadville and Salida, Colorado. The valley is structurally controlled by an extensional fault system that forms part of the prominent northern Rio Grande rift, an intra-continental region...Kellogg, Karl S.; Shroba, Ralph R.; Ruleman, Chester A.; Bohannon, Robert G.; McIntosh, William C.; Premo, Wayne R.; Cosca, Michael A.; Moscati, Richard J.; Brandt, Theodore R.
U-Pb ages and geochemistry of zircon from Proterozoic plutons of the Sawatch and Mosquito ranges, Colorado, U.S.A.: Implications for crustal growth of the central Colorado province
A broad study of zircons from plutonic rocks of the Sawatch and Mosquito ranges of west-central Colorado (U.S.A.) was undertaken to significantly refine the magmatic chronology and chemistry of this under-studied region of the Colorado province. This region was chosen because it lies just to the north of the suspected arc-related Gunnison-Salida...Moscati, Richard J.; Premo, Wayne R.; Dewitt, Ed; Wooden, Joseph L.
High spatial resolution U-Pb geochronology and Pb isotope geochemistry of magnetite-apatite ore from the Pea Ridge iron oxide-apatite deposit, St. Francois Mountains, southeast Missouri, USA
The Pea Ridge iron oxide-apatite (IOA) deposit is one of the major rhyolite-hosted magnetite deposits of the St. Francois Mountains terrane, which is located within the Mesoproterozoic (1.5–1.3 Ga) Granite-Rhyolite province in the U.S. Midcontinent. Precise and accurate determination of the timing and duration of oreforming processes in this...Neymark, Leonid; Holm-Denoma, Christopher S.; Pietruszka, Aaron; Aleinikoff, John N.; Fanning, C. Mark; Pillers, Renee M.; Moscati, Richard J.
Major element and oxygen isotope geochemistry of vapour-phase garnet from the Topopah Spring Tuff at Yucca Mountain, Nevada, USA
Twenty vapour-phase garnets were studied in two samples of the Topopah Spring Tuff of the Paintbrush Group from Yucca Mountain, in southern Nevada. The Miocene-age Topopah Spring Tuff is a 350 m thick, devitrified, moderately to densely welded ash-flow tuff that is zoned compositionally from high-silica rhyolite to latite. During cooling of the...Moscati, Richard J.; Johnson, Craig A.
U–Pb, Rb–Sr, and U-series isotope geochemistry of rocks and fracture minerals from the Chalk River Laboratories site, Grenville Province, Ontario, Canada
As part of the Geologic Waste Management Facility feasibility study, Atomic Energy of Canada Ltd. (AECL) is evaluating the suitability of the Chalk River Laboratories (CRL) site in Ontario, situated in crystalline rock of the southwestern Grenville Province, for the possible development of an underground repository for low- and intermediate-level...Neymark, Leonid; Peterman, Zell E.; Moscati, Richard J.; Thivierge, R. H.
Mass fractionation of noble gases in synthetic methane hydrate: Implications for naturally occurring gas hydrate dissociation
As a consequence of contemporary or longer term (since 15 ka) climate warming, gas hydrates in some settings may presently be dissociating and releasing methane and other gases to the ocean-atmosphere system. A key challenge in assessing the impact of dissociating gas hydrates on global atmospheric methane is the lack of a technique able to...Hunt, Andrew G.; Stern, Laura; Pohlman, John W.; Ruppel, Carolyn; Moscati, Richard J.; Landis, Gary P.
Fluid geochemistry of Yucca Mountain and vicinity
Yucca Mountain, a site in southwest Nevada, has been proposed for a deep underground radioactive waste repository. An extensive database of geochemical and isotopic characteristics has been established for pore waters and gases from the unsaturated zone, perched water, and saturated zone waters in the Yucca Mountain area. The development of this...Stuckless, John S.; Marshall, Brian D.; Moscati, Richard J.; Patterson, Gary L.
The Spar Lake strata-Bound Cu-Ag deposit formed across a mixing zone between trapped natural gas and metals-bearing brine
Ore formation at the Spar Lake red bed-associated strata-bound Cu deposit took place across a mixing and reaction zone between a hot oxidized metals-transporting brine and a reservoir of “sour” (H2S-bearing) natural gas trapped in the host sandstones. Fluid inclusion volatile analyses have very high CH4 concentrations (≥1 mol % in most samples),...Hayes, Timothy S.; Landis, Gary P.; Whelan, Joseph F.; Rye, Robert O.; Moscati, Richard J.
Meteoric precipitation at Yucca Mountain, Nevada: Chemical and stable isotope analyses, 2006-09
Meteoric precipitation samples collected in 2006-09 at Yucca Mountain, Nevada, were analyzed for chemistry and stable isotope composition. Precipitation is the major source of infiltration to the unsaturated zone and of recharge to the saturated zone at Yucca Mountain. On February 28, 2005, seepage of water was observed about 40 to 80 meters below...Moscati, Richard J.; Scofield, Kevin M.
Observations of mass fractionation of noble gases in synthetic methane hydrate
As a consequence of contemporary or longer term (since 15 ka) climate warming, gas hydrates in some settings are presently dissociating and releasing methane and other gases to the oceanatmosphere system. A key challenge in assessing the susceptibility of gas hydrates to warming climate is the lack of a technique able to distinguish between...Hunt, Andrew G.; Pohlman, John; Stern, Laura A.; Ruppel, Carolyn D.; Moscati, Richard J.; Landis, Gary P.; Pinkston, John C.