Thesis (B.Sc.(Hons.))--University of Adelaide, Dept. of Economic Geology, 1979.

Thesis (Ph.D.)--Indiana University, Dept. of Geological Sciences, 2005. / Adviser: Edward M. Ripley.

Thesis (Ph.D.)--Rice University, 2007. / (UMI)AAI3257331. Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1511. Advisers: Gerald R. Dickens; Andre W. Droxler.

Thesis (Ph.D.)--Indiana University, Dept. of Geological Studies, 2007. / Title from PDF t.p. (viewed Nov. 19, 2008). Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 0846. Adviser: Juergen Schieber.

Thesis (Ph.D.)--Indiana University, Dept. of Geological Sciences, 2008. / Title from PDF t.p. (viewed on May 14, 2009). Source: Dissertation Abstracts International, Volume: 69-08, Section: B, page: 4623. Adviser: Edward M. Ripley.

Thesis (Ph.D.)--Indiana University, Dept. of Geological Sciences, 2008. / Title from PDF t.p. (viewed on May 14, 2009). Source: Dissertation Abstracts International, Volume: 69-09, Section: B, page: 5279. Adviser: Edward M. Ripley.

Thesis (Ph. D.)--Indiana University, Dept. of Geological Sciences, 2005. / Title from PDF t.p. (viewed Dec. 3, 2008). Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1355. Co-Chairs: Maria Mastalerz; Simon Brassell.

<p> In the southern White Pine Range (SWPR) silica is found to have been deposited from hydrothermal solution within the Currant Gap Detachment fault (CGD). Silica has been observed to occur in three modes of deposition: (1) narrow veins within the lower plate Pole Canyon limestone, (2) bulk silicification of carbonates and (3) breccia matrix found in proximity to the CGD. </p><p> Through stable isotope analysis of oxygen from quartz samples and hydrogen from fluid inclusions we see that there is a history of meteoric waters penetrating into the Lower Pole Canyon Formation, in the lower plate of the CGD. This study reveals that silica in the SWPR formed from aqueous fluids at temperatures between 260 &deg;C and 315 &deg;C within lower plate quartz veins and 150 &deg;C to 300 &deg;C within the upper plate of the CGD. These temperature ranges are in line with what would be expected in a brittle regime (T &lt; 350 &deg;C).</p><p>

<p> Quantifying recharge in arid watersheds, such as the Indian Wells Valley, CA, is critical for a reliable assessment of groundwater availability. In this study, lumped parameter models were coupled with tritium, radiocarbon, and helium data to generate groundwater ages. These ages were paired with (1) noble gas temperatures (NGTs) data to evaluate paleotemperature trends, and (2) well and aquifer parameters to calculate groundwater recharge rates. Age trends of NGTs reveal a complex climatic evolution within the Indian Wells Valley. Exponential trends between the point scale groundwater recharge rates and distance between the well and the mountain fronts of the basin translate to a mean mountain front recharge rate of 9.92 millimeters per year. These trends may be applicable in other arid settings where a lack of point scale data prevents a reliable estimation of recharge.</p><p>

<p> Recent debate has questioned the efficiency of magma differentiation in basaltic magma chambers (Marsh, 2013). As a result, petrologists are increasingly inclined to interpret olivine cumulate layers in small intrusive bodies as separately injected slurries, as opposed to the result of in-situ differentiation. Two sills with basal olivine layers, the 0601 sill, Victoria Island, NWT, Canada, and the Palisades Sill, Fort Lee, NJ have been examined in detail. First, it can be shown that the 0601 sill could have formed by the emplacement of a single phenocryst bearing magma, followed by settling of the initial phenocryst load, and in-situ differentiation. Second, a high-resolution analysis of the internal ordering of the Palisades Sill olivine horizon, widely recognized as the result of an olivine slurry, is described in order to create a generalizable model of basal olivine layers formed via slurry emplacement (Husch, 1990; Gorring, 1995). Both sills were analyzed for whole rock major and trace element compositions, mineral compositions, crystal size distributions and modal mineralogy. Parent-Daughter modeling, Pearce Element Ratio Analysis, trace element modeling, and MELTS (Ghiorso and Sack, 1995; Asimow and Ghiorso, 1998) were then used to model formation mechanisms. Finally, the 0601 sill olivine cumulate layer is com-pared with the Palisades Sill olivine horizon. While both olivine cumulate zones look superficially similar, detailed investigation reveals that a well developed trend of progressively increasing olivine upward from the base, as observed in the 0601 sill is best explained by crystal settling within an initial phenocryst-phyric magma, followed by in-situ differentiation, and cannot be explained by a slurry emplacement process.</p><p>