The origin and history of alteration and carbonatization of the Yucca Mountain ignimbrites. Volume I

Dialogs on the Yucca Mountain controversy. Special report No. 5

“…It should be emphasized that this data was all published in reports and papers available to the NAS panel and that nearly all of it was obtained by DOE contractors, including (and predominantly) the USGS. (In this regard the reference to Szymanski, 1992, in Figure 1 refers to his compilation of results from a number of authors who were associated with the DOE program.) In looking at Figure (1) it is evident that none of the temperature data for vein formation, rock alteration or zircon annealing can possibly be due to rain water.…”

“…In this report we examine the spatial distribution of the various types of chemical alteration indicated by the data reported in Broxton, et al (1986) in order to evaluate the location, spatial character and extent of the alteration with the hope of shedding light on the origin of the altering fluids and to test the hypogene hypothesis of Szymanski (1992). In this regard, it is of prime importance is to evaluate whether the metasomatic alteration reflects supergene or, conversely, hypogene processes.…”

Review of USGS OFR 92-516. Special report No. 4

“…where the repository would be situated) (Smith, 1991). Chemical analysis of water shows that it is mineral water, which welled up from the carbonates and other Precambrian rocks underlying the vdcanics (Szymanski, 1992 The persistence of such a high gradient seems doubtful as the normal gradient in the Basin and Range area is only 20"Ckm. (p. 37)…”

Dialogs on the Yucca Mountain controversy. Special report No. 10

“…Clinoptilolites of the dacite flow breccia, Tfb, are Na20 rich. Szymanski (1992). Though Broxton, et a/.…”