Geologic Map of Oasis Valley Spring-Discharge Area and Vicinity, Nye County, Nevada

Fridrich, Christopher J.; Minor, Scott A.; Slate, Janet L.; Ryder, P.L.

doi:10.3133/sim2957

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“…The Timber Mountain and Paintbrush (Pliocene) and Crater Flat (Miocene) ash-flow tuffs and rhyolitic ash-flow dominate the area's geology. Older welded tuff, basalt, sedimentary breccia and conglomerate and hydrothermally altered rhyolites form a minority of the area (Fridrich, 2007). The northern tip of Bare Mountain, a Paleozoic carbonate unit, intersects the southern boundary of the East/West flight box.…”

Section: Local Geologymentioning

confidence: 99%

Final Report for the MANNRRSS II Program Management of Nevada's Natural Resources with Remote Sensing Systems, Beatty, NV

Miller¹,

Horowitz²,

Kratt³

et al. 2009

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Section: Local Geologymentioning

confidence: 99%

Final Report for the MANNRRSS II Program Management of Nevada's Natural Resources with Remote Sensing Systems, Beatty, NV

Miller¹,

Horowitz²,

Kratt³

et al. 2009

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The Gold Flat Tuff, Nevada: Insights into the evolution of peralkaline silicic magmas

Macdonald

Bagiński

Belkin³

et al. 2019

Lithos

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The Gold Flat Tuff is the youngest (9.15 Ma) ash-flow sheet erupted from the Black Mountain Volcanic Centre, southwest Nevada, USA. This paper explores some aspects of the very complex nature of the tuff's plumbing system. The main body of the deposit is a mixed magma product, comprising pantelleritic and comenditic melts derived from independently evolving reservoirs, and antecrysts and enclaves derived from a range of basic to intermediate sources. Metre-scale cognate xenoliths point to the presence of alkali feldspar accumulation zones. The pantellerite contains phenocrysts of fluorite and chevkinite-(Ce). The inferred intermediate magma component contains perrierite-(Ce) phenocrysts. The pantellerite has unusually high contents of F (≤2.2 wt%), F+Cl (≤2.9 wt%) and ZrO2 (≤1.04 wt%). The high halogen contents may have influenced the evolution of the strongly peralkaline magma. The crystallization conditions are poorly constrained but those for the pantelleritic magma may have been close to water-saturation (>4 wt% melt water) at temperatures ~740 °C and fO2 around FMQ.

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Geologic Map of Oasis Valley Spring-Discharge Area and Vicinity, Nye County, Nevada

Cited by 2 publications

References 22 publications

Final Report for the MANNRRSS II Program Management of Nevada's Natural Resources with Remote Sensing Systems, Beatty, NV

Final Report for the MANNRRSS II Program Management of Nevada's Natural Resources with Remote Sensing Systems, Beatty, NV

The Gold Flat Tuff, Nevada: Insights into the evolution of peralkaline silicic magmas

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