We are inviting IDEALS users, both people looking for materials in IDEALS and those who want to deposit their work, to give us feedback on improving this service through an interview. Participants will receive a $20 VISA gift card. Please sign up via webform. # Browse Dissertations and Theses - Geology by Subject "Geochemistry" • (1999) A process model of this drainage shows the main controls on the pH are reaction with local bedrock, limestone conglomerate, and concurrent mixing with tributary streams draining unmined regions. Models that account for ... application/pdf PDF (3MB) • (1982) A solution 0.79 Molal in NaCl and 0.079 Molal in CaCl(,2) was forced through clay cakes made by sedimenting the one-half to two micron size fraction of Cheto clay. The two cakes sedimented from distilled water had nearly ... application/pdf PDF (3MB) • (1984) Solutions of NaCl and NaCl-CaCl were forced through clay plugs made by compacting the 0.2 to 2.0 micron size fraction of Cheto montmorillonite. The concentration of NaCl solution was either 1.10 m or 1.087 m, and that of ... application/pdf PDF (7MB) • (1985) The hydration states of a dioctahedral smectite in contact with saline solutions were determined at temperatures and hydraulic pressures that simulate burial diagenetic environments. A high-pressure high-temperature X-ray ... application/pdf PDF (3MB) • (1991) Textures similar to those found in natural microcrystalline limestones (micrites) were produced by closed-system (70-200$\sp\circ$C/1-15.6 bars/1-486 days) and open-system (90-95$\sp\circ$C/1 bar/63-311 days; 10-200 mL/day) ... application/pdf PDF (15MB) • (1978) application/pdf PDF (3MB) • (2004) Microbiologists have long believed that highly alkaline conditions are poorly supportive of microbial life, in part because an environment lacking in hydrogen ions (H+) is likely to interfere with the proton motive force, ... application/pdf PDF (3MB) • (1988) Structure and chemical composition of the products of the reaction of crystalline low albite and a glass of nearly albite composition with aqueous solutions of pH's from 1 to 11 at 250$\sp\circ$C and the mechanisms of these ... application/pdf PDF (4MB) • (1996) Illite was first named in 1937 in Illinois by Ralph Grim, one of the founders of clay mineralogy. Illite is the most abundant clay mineral on the earth's surface. However, we know very little about the origin of illite in ... application/pdf PDF (4MB) • (1974) application/pdf PDF (2MB) • (1976) application/pdf PDF (8MB) • (1994) This investigation focuses on the chemistry of dolomitization and the geochemical and petrographic characteristics of the Middle Ordovician limestones and dolostones in the Illinois basin. application/pdf PDF (6MB) • (1996) A rhyolitic hyaloclastite from Ponza island, Italy, has been hydrothermally altered producing four distinct alteration zones based on XRD and field textures: (1) non-pervasive argillic zone; (2) propylitic zone; (3) silicic ... application/pdf PDF (6MB) • (1975) application/pdf PDF (4MB) • (1992) Textural, chemical, and mineralogical analyses of authigenic clays in anthracite-rank coal from eastern Pennsylvania have allowed a better understanding of parameters controlling diagenesis and relationships among mineral ... application/pdf PDF (6MB) • (1995) This thesis investigates the local environments and dynamic behavior of anions and cations adsorbed onto mineral surfaces, using$\sp{31}$P and$\sp{133}$Cs magic angle spinning (MAS) nuclear magnetic resonance (NMR) ... application/pdf PDF (5MB) • (1989) Oxygen isotope evidence from Caradocian Trenton Group brachiopods in the Mohawk Valley of New York suggests that Caradocian oceans were salinity-stratified and dominated at depth by warm, saline waters.$\delta\sp{18}\$O ...

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• (1979)

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• (1990)
In Hole UPH-3 the Mt. Simon Sandstone contains three distinct diagenetic zones: an upper K-feldspar overgrowth zone, an underlying sericite zone, and a lowermost feldspar zone. Uppermost Precambrian basement exhibits ...

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• (1993)
In this study, I develop a numerical model to predict dissolution and precipitation reactions by groundwater flow through temperature and pressure gradients in sedimentary basins. I incorporate chemical reaction into a ...

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