Comparative evaluation and use of petrophysically derived and laboratory-measured core porosity data at yucca mountain,nevada

摘要

Volcanic rocks within the unsaturated zone at Yucca Mountain in southwestern Nevada are being considered by the U.S. Department of Energy as the host for a geologic repository for high-level nuclear waste.These rocks comprise a sequence of variably welded,nonwelded,ad subae-rially reworked tuffaceousdeposits deposited,principally during Miocene time,as the result of regional silicic volca-nism that produced thick pyroclastic-flow and air-fall deposits across much of southwestern Nevada.